diff --git a/.firefox.metadata b/.firefox.metadata index 2f7e453..692c2d9 100644 --- a/.firefox.metadata +++ b/.firefox.metadata @@ -1,7 +1,7 @@ 18a8f30a0356c751b8d0ea6f76e764cab13ee046 SOURCES/Python-2.7.13.tar.xz a9effcc06cf80eaa22f12c1f7d6aa4266a1c4966 SOURCES/cbindgen-vendor-0.14.3.tar.xz -ae46913563ffe92efa7cdaacb818435a4c3d4492 SOURCES/firefox-78.5.0esr.source.tar.xz -6049ef7708e6855c1c96d881e0dfd54a9991ef2b SOURCES/firefox-langpacks-78.5.0esr-20201118.tar.xz +4dc4e41ae749e1d189ac8f45d0b804a18b8d38c3 SOURCES/firefox-78.6.0esr.source.tar.xz +d45296cbd3128ebc9aaf3f91a8b1d4cd6051365a SOURCES/firefox-langpacks-78.6.0esr-20201210.tar.xz 0de63f863b158454b9429234b52ed28a397ec45c SOURCES/gtk3-private-3.22.26-1.el6.src.rpm e188ab1a444697bc649e223c28389d82ca94c472 SOURCES/libffi-3.0.13-18.el7_3.src.rpm 5715f987bc0024ce5d72993cb101b8268350033b SOURCES/nodejs-10.21.0-5.fc32.src.rpm diff --git a/.gitignore b/.gitignore index 807fdd0..297d297 100644 --- a/.gitignore +++ b/.gitignore @@ -1,7 +1,7 @@ SOURCES/Python-2.7.13.tar.xz SOURCES/cbindgen-vendor-0.14.3.tar.xz -SOURCES/firefox-78.5.0esr.source.tar.xz -SOURCES/firefox-langpacks-78.5.0esr-20201118.tar.xz +SOURCES/firefox-78.6.0esr.source.tar.xz +SOURCES/firefox-langpacks-78.6.0esr-20201210.tar.xz SOURCES/gtk3-private-3.22.26-1.el6.src.rpm SOURCES/libffi-3.0.13-18.el7_3.src.rpm SOURCES/nodejs-10.21.0-5.fc32.src.rpm diff --git a/SOURCES/Bug-1238661---fix-mozillaSignalTrampoline-to-work-.patch b/SOURCES/Bug-1238661---fix-mozillaSignalTrampoline-to-work-.patch deleted file mode 100644 index 6dfe2ad..0000000 --- a/SOURCES/Bug-1238661---fix-mozillaSignalTrampoline-to-work-.patch +++ /dev/null @@ -1,12 +0,0 @@ -diff -up firefox-60.0/mfbt/LinuxSignal.h.mozilla-1238661 firefox-60.0/mfbt/LinuxSignal.h ---- firefox-60.0/mfbt/LinuxSignal.h.mozilla-1238661 2018-04-27 08:55:38.848241768 +0200 -+++ firefox-60.0/mfbt/LinuxSignal.h 2018-04-27 09:06:47.946769859 +0200 -@@ -22,7 +22,7 @@ __attribute__((naked)) void SignalTrampo - void* aContext) { - asm volatile("nop; nop; nop; nop" : : : "memory"); - -- asm volatile("b %0" : : "X"(H) : "memory"); -+ asm volatile("bx %0" : : "r"(H), "l"(aSignal), "l"(aInfo), "l"(aContext) : "memory"); - } - - # define MOZ_SIGNAL_TRAMPOLINE(h) (mozilla::SignalTrampoline) diff --git a/SOURCES/Bug-1526653---fix_user_vfp_armv7.patch b/SOURCES/Bug-1526653---fix_user_vfp_armv7.patch deleted file mode 100644 index 3f84f95..0000000 --- a/SOURCES/Bug-1526653---fix_user_vfp_armv7.patch +++ /dev/null @@ -1,35 +0,0 @@ -From fd6847c9416f9eebde636e21d794d25d1be8791d Mon Sep 17 00:00:00 2001 -From: Mike Hommey -Date: Sat, 1 Jun 2019 09:06:01 +0900 -Subject: [PATCH] Bug 1526653 - Include struct definitions for user_vfp and - user_vfp_exc. - ---- - js/src/wasm/WasmSignalHandlers.cpp | 11 ++++++++++- - 1 file changed, 10 insertions(+), 1 deletion(-) - -diff --git a/js/src/wasm/WasmSignalHandlers.cpp b/js/src/wasm/WasmSignalHandlers.cpp -index 636537f8478..383c380f04c 100644 ---- a/js/src/wasm/WasmSignalHandlers.cpp -+++ b/js/src/wasm/WasmSignalHandlers.cpp -@@ -248,7 +248,16 @@ using mozilla::DebugOnly; - #endif - - #ifdef WASM_EMULATE_ARM_UNALIGNED_FP_ACCESS --# include -+struct user_vfp { -+ unsigned long long fpregs[32]; -+ unsigned long fpscr; -+}; -+ -+struct user_vfp_exc { -+ unsigned long fpexc; -+ unsigned long fpinst; -+ unsigned long fpinst2; -+}; - #endif - - #if defined(ANDROID) --- -2.20.1 - diff --git a/SOURCES/firefox-centos-default-prefs.js b/SOURCES/firefox-centos-default-prefs.js deleted file mode 100644 index ea10021..0000000 --- a/SOURCES/firefox-centos-default-prefs.js +++ /dev/null @@ -1,35 +0,0 @@ -pref("app.update.auto", false); -pref("app.update.enabled", false); -pref("app.update.autoInstallEnabled", false); -pref("general.smoothScroll", true); -pref("intl.locale.matchOS", true); -pref("toolkit.storage.synchronous", 0); -pref("toolkit.networkmanager.disable", false); -pref("offline.autoDetect", true); -pref("browser.backspace_action", 2); -pref("browser.display.use_system_colors", true); -pref("browser.download.folderList", 1); -pref("browser.link.open_external", 3); -pref("browser.shell.checkDefaultBrowser", false); -pref("network.manage-offline-status", true); -pref("extensions.shownSelectionUI", true); -pref("ui.SpellCheckerUnderlineStyle", 1); -pref("startup.homepage_override_url", "http://www.centos.org"); -pref("startup.homepage_welcome_url", "http://www.centos.org"); -pref("browser.startup.homepage", "data:text/plain,browser.startup.homepage=file:///usr/share/doc/HTML/index.html"); -pref("geo.wifi.uri", "https://location.services.mozilla.com/v1/geolocate?key=%MOZILLA_API_KEY%"); -pref("media.gmp-gmpopenh264.provider.enabled",false); -pref("media.gmp-gmpopenh264.autoupdate",false); -pref("media.gmp-gmpopenh264.enabled",false); -pref("media.gmp-gmpopenh264.enabled",false); -pref("plugins.notifyMissingFlash", false); -/* See https://bugzilla.redhat.com/show_bug.cgi?id=1226489 */ -pref("browser.display.use_system_colors", false); -pref("layers.use-image-offscreen-surfaces", false); -/* Allow sending credetials to all https:// sites */ -pref("network.negotiate-auth.trusted-uris", "https://"); -pref("security.use_sqldb", false); -/* Use OS settings for UI language */ -pref("intl.locale.requested", ""); -/* See https://bugzilla.redhat.com/show_bug.cgi?id=1672424 */ -pref("storage.nfs_filesystem", true); diff --git a/SOURCES/rust-1.47.patch b/SOURCES/rust-1.47.patch deleted file mode 100644 index 65441a1..0000000 --- a/SOURCES/rust-1.47.patch +++ /dev/null @@ -1,35276 +0,0 @@ - -# HG changeset patch -# User Emilio Cobos Álvarez -# Date 1599584448 0 -# Node ID 85c38ea4d34969797eb5d24265cd90cc6841e6ae -# Parent 5aa243a2fe9d77578dd95ce3ab3a2aa6c1e92604 -Bug 1663715 - Update syn and proc-macro2 so that Firefox can build on Rust nightly again. r=froydnj, a=RyanVM - -Generated with: - - cargo update -p syn --precise 1.0.40 - ./mach vendor rust - -Rust issue: https://github.com/rust-lang/rust/issues/76482 - -Differential Revision: https://phabricator.services.mozilla.com/D89473 - -diff --git a/Cargo.lock b/Cargo.lock ---- a/Cargo.lock -+++ b/Cargo.lock -@@ -3712,19 +3712,19 @@ checksum = "ecd45702f76d6d3c75a80564378a - dependencies = [ - "proc-macro2", - "quote", - "syn", - ] - - [[package]] - name = "proc-macro2" --version = "1.0.5" --source = "registry+https://github.com/rust-lang/crates.io-index" --checksum = "90cf5f418035b98e655e9cdb225047638296b862b42411c4e45bb88d700f7fc0" -+version = "1.0.20" -+source = "registry+https://github.com/rust-lang/crates.io-index" -+checksum = "175c513d55719db99da20232b06cda8bab6b83ec2d04e3283edf0213c37c1a29" - dependencies = [ - "unicode-xid", - ] - - [[package]] - name = "procedural-masquerade" - version = "0.1.1" - source = "registry+https://github.com/rust-lang/crates.io-index" -@@ -4642,19 +4642,19 @@ dependencies = [ - "cc", - "gleam", - "glsl-to-cxx", - "webrender_build", - ] - - [[package]] - name = "syn" --version = "1.0.5" --source = "registry+https://github.com/rust-lang/crates.io-index" --checksum = "66850e97125af79138385e9b88339cbcd037e3f28ceab8c5ad98e64f0f1f80bf" -+version = "1.0.40" -+source = "registry+https://github.com/rust-lang/crates.io-index" -+checksum = "963f7d3cc59b59b9325165add223142bbf1df27655d07789f109896d353d8350" - dependencies = [ - "proc-macro2", - "quote", - "unicode-xid", - ] - - [[package]] - name = "sync-guid" -diff --git a/third_party/rust/proc-macro2/.cargo-checksum.json b/third_party/rust/proc-macro2/.cargo-checksum.json ---- a/third_party/rust/proc-macro2/.cargo-checksum.json -+++ b/third_party/rust/proc-macro2/.cargo-checksum.json -@@ -1,1 +1,1 @@ --{"files":{"Cargo.toml":"e2c1fc6ed317eeef8462fcd192f6b6389e1d84f0d7afeac78f12c23903deddf8","LICENSE-APACHE":"a60eea817514531668d7e00765731449fe14d059d3249e0bc93b36de45f759f2","LICENSE-MIT":"378f5840b258e2779c39418f3f2d7b2ba96f1c7917dd6be0713f88305dbda397","README.md":"362a2156f7645528061b6e8487a2eb0f32f1693012ed82ee57afa05c039bba0d","build.rs":"0cc6e2cb919ddbff59cf1d810283939f97a59f0037540c0f2ee3453237635ff8","src/fallback.rs":"5c6379a90735e27abcc40253b223158c6b1e5784f3850bc423335363e87ef038","src/lib.rs":"ae5251296ad3fcd8b600919a993fec0afd8b56da3e11fef6bc7265b273129936","src/strnom.rs":"37f7791f73f123817ad5403af1d4e2a0714be27401729a2d451bc80b1f26bac9","src/wrapper.rs":"81372e910604217a625aa71c47d43e65f4e008456eae93ac39325c9abf10701a","tests/features.rs":"a86deb8644992a4eb64d9fd493eff16f9cf9c5cb6ade3a634ce0c990cf87d559","tests/marker.rs":"c2652e3ae1dfcb94d2e6313b29712c5dcbd0fe62026913e67bb7cebd7560aade","tests/test.rs":"8c427be9cba1fa8d4a16647e53e3545e5863e29e2c0b311c93c9dd1399abf6a1"},"package":"90cf5f418035b98e655e9cdb225047638296b862b42411c4e45bb88d700f7fc0"} -\ No newline at end of file -+{"files":{"Cargo.toml":"c20c4c52342e65ea11ad8382edc636e628e8f8c5ab7cffddc32426b2fe8fe4cd","LICENSE-APACHE":"a60eea817514531668d7e00765731449fe14d059d3249e0bc93b36de45f759f2","LICENSE-MIT":"378f5840b258e2779c39418f3f2d7b2ba96f1c7917dd6be0713f88305dbda397","README.md":"e1f9d4fc22cff2c049f166a403b41458632a94357890d31cf0e3ad83807fb430","build.rs":"332185d7ad4c859210f5edd7a76bc95146c8277726a2f81417f34927c4424d68","src/detection.rs":"9d25d896889e65330858f2d6f6223c1b98cd1dad189813ad4161ff189fbda2b8","src/fallback.rs":"239f9a25c0f2ab57592288d944c7f1a0f887536b6d4dc2428a17640af8d10a41","src/lib.rs":"2b1d98424c9b23b547dabf85554120e5e65472026a0f3f711b3a097bca7c32fe","src/parse.rs":"500edee9773132e27e44d0fdaa042b1cb9451e29e65124493986f51710c0664c","src/wrapper.rs":"d36c0dced7ec0e7585c1f935cda836080bcae6de1de3d7851d962e9e11a3ac48","tests/comments.rs":"ea6cbe6f4c8852e6a0612893c7d4f2c144a2e6a134a6c3db641a320cbfc3c800","tests/features.rs":"a86deb8644992a4eb64d9fd493eff16f9cf9c5cb6ade3a634ce0c990cf87d559","tests/marker.rs":"c2652e3ae1dfcb94d2e6313b29712c5dcbd0fe62026913e67bb7cebd7560aade","tests/test.rs":"310c856e27ff61c9ec7f0a5cd96031aac02971557b1621f5e17b089d58e79bcd","tests/test_fmt.rs":"745dfdc41d09c5308c221395eb43f2041f0a1413d2927a813bc2ad4554438fe2"},"package":"175c513d55719db99da20232b06cda8bab6b83ec2d04e3283edf0213c37c1a29"} -\ No newline at end of file -diff --git a/third_party/rust/proc-macro2/Cargo.toml b/third_party/rust/proc-macro2/Cargo.toml ---- a/third_party/rust/proc-macro2/Cargo.toml -+++ b/third_party/rust/proc-macro2/Cargo.toml -@@ -8,36 +8,35 @@ - # If you believe there's an error in this file please file an - # issue against the rust-lang/cargo repository. If you're - # editing this file be aware that the upstream Cargo.toml - # will likely look very different (and much more reasonable) - - [package] - edition = "2018" - name = "proc-macro2" --version = "1.0.5" --authors = ["Alex Crichton "] --description = "A stable implementation of the upcoming new `proc_macro` API. Comes with an\noption, off by default, to also reimplement itself in terms of the upstream\nunstable API.\n" --homepage = "https://github.com/alexcrichton/proc-macro2" -+version = "1.0.20" -+authors = ["Alex Crichton ", "David Tolnay "] -+description = "A substitute implementation of the compiler's `proc_macro` API to decouple\ntoken-based libraries from the procedural macro use case.\n" - documentation = "https://docs.rs/proc-macro2" - readme = "README.md" - keywords = ["macros"] -+categories = ["development-tools::procedural-macro-helpers"] - license = "MIT OR Apache-2.0" - repository = "https://github.com/alexcrichton/proc-macro2" - [package.metadata.docs.rs] - rustc-args = ["--cfg", "procmacro2_semver_exempt"] - rustdoc-args = ["--cfg", "procmacro2_semver_exempt"] -+targets = ["x86_64-unknown-linux-gnu"] - --[lib] --name = "proc_macro2" -+[package.metadata.playground] -+features = ["span-locations"] - [dependencies.unicode-xid] - version = "0.2" - [dev-dependencies.quote] - version = "1.0" - default_features = false - - [features] - default = ["proc-macro"] - nightly = [] - proc-macro = [] - span-locations = [] --[badges.travis-ci] --repository = "alexcrichton/proc-macro2" -diff --git a/third_party/rust/proc-macro2/README.md b/third_party/rust/proc-macro2/README.md ---- a/third_party/rust/proc-macro2/README.md -+++ b/third_party/rust/proc-macro2/README.md -@@ -1,11 +1,11 @@ - # proc-macro2 - --[![Build Status](https://api.travis-ci.com/alexcrichton/proc-macro2.svg?branch=master)](https://travis-ci.com/alexcrichton/proc-macro2) -+[![Build Status](https://img.shields.io/github/workflow/status/alexcrichton/proc-macro2/build%20and%20test)](https://github.com/alexcrichton/proc-macro2/actions) - [![Latest Version](https://img.shields.io/crates/v/proc-macro2.svg)](https://crates.io/crates/proc-macro2) - [![Rust Documentation](https://img.shields.io/badge/api-rustdoc-blue.svg)](https://docs.rs/proc-macro2) - - A wrapper around the procedural macro API of the compiler's `proc_macro` crate. - This library serves two purposes: - - - **Bring proc-macro-like functionality to other contexts like build.rs and - main.rs.** Types from `proc_macro` are entirely specific to procedural macros -diff --git a/third_party/rust/proc-macro2/build.rs b/third_party/rust/proc-macro2/build.rs ---- a/third_party/rust/proc-macro2/build.rs -+++ b/third_party/rust/proc-macro2/build.rs -@@ -9,16 +9,20 @@ - // "wrap_proc_macro" - // Wrap types from libproc_macro rather than polyfilling the whole API. - // Enabled on rustc 1.29+ as long as procmacro2_semver_exempt is not set, - // because we can't emulate the unstable API without emulating everything - // else. Also enabled unconditionally on nightly, in which case the - // procmacro2_semver_exempt surface area is implemented by using the - // nightly-only proc_macro API. - // -+// "hygiene" -+// Enable Span::mixed_site() and non-dummy behavior of Span::resolved_at -+// and Span::located_at. Enabled on Rust 1.45+. -+// - // "proc_macro_span" - // Enable non-dummy behavior of Span::start and Span::end methods which - // requires an unstable compiler feature. Enabled when building with - // nightly, unless `-Z allow-feature` in RUSTFLAGS disallows unstable - // features. - // - // "super_unstable" - // Implement the semver exempt API in terms of the nightly-only proc_macro -@@ -52,16 +56,24 @@ fn main() { - // https://github.com/alexcrichton/proc-macro2/issues/147 - println!("cargo:rustc-cfg=procmacro2_semver_exempt"); - } - - if semver_exempt || cfg!(feature = "span-locations") { - println!("cargo:rustc-cfg=span_locations"); - } - -+ if version.minor < 39 { -+ println!("cargo:rustc-cfg=no_bind_by_move_pattern_guard"); -+ } -+ -+ if version.minor >= 45 { -+ println!("cargo:rustc-cfg=hygiene"); -+ } -+ - let target = env::var("TARGET").unwrap(); - if !enable_use_proc_macro(&target) { - return; - } - - println!("cargo:rustc-cfg=use_proc_macro"); - - if version.nightly || !semver_exempt { -diff --git a/third_party/rust/proc-macro2/src/detection.rs b/third_party/rust/proc-macro2/src/detection.rs -new file mode 100644 ---- /dev/null -+++ b/third_party/rust/proc-macro2/src/detection.rs -@@ -0,0 +1,67 @@ -+use std::panic::{self, PanicInfo}; -+use std::sync::atomic::*; -+use std::sync::Once; -+ -+static WORKS: AtomicUsize = AtomicUsize::new(0); -+static INIT: Once = Once::new(); -+ -+pub(crate) fn inside_proc_macro() -> bool { -+ match WORKS.load(Ordering::SeqCst) { -+ 1 => return false, -+ 2 => return true, -+ _ => {} -+ } -+ -+ INIT.call_once(initialize); -+ inside_proc_macro() -+} -+ -+pub(crate) fn force_fallback() { -+ WORKS.store(1, Ordering::SeqCst); -+} -+ -+pub(crate) fn unforce_fallback() { -+ initialize(); -+} -+ -+// Swap in a null panic hook to avoid printing "thread panicked" to stderr, -+// then use catch_unwind to determine whether the compiler's proc_macro is -+// working. When proc-macro2 is used from outside of a procedural macro all -+// of the proc_macro crate's APIs currently panic. -+// -+// The Once is to prevent the possibility of this ordering: -+// -+// thread 1 calls take_hook, gets the user's original hook -+// thread 1 calls set_hook with the null hook -+// thread 2 calls take_hook, thinks null hook is the original hook -+// thread 2 calls set_hook with the null hook -+// thread 1 calls set_hook with the actual original hook -+// thread 2 calls set_hook with what it thinks is the original hook -+// -+// in which the user's hook has been lost. -+// -+// There is still a race condition where a panic in a different thread can -+// happen during the interval that the user's original panic hook is -+// unregistered such that their hook is incorrectly not called. This is -+// sufficiently unlikely and less bad than printing panic messages to stderr -+// on correct use of this crate. Maybe there is a libstd feature request -+// here. For now, if a user needs to guarantee that this failure mode does -+// not occur, they need to call e.g. `proc_macro2::Span::call_site()` from -+// the main thread before launching any other threads. -+fn initialize() { -+ type PanicHook = dyn Fn(&PanicInfo) + Sync + Send + 'static; -+ -+ let null_hook: Box = Box::new(|_panic_info| { /* ignore */ }); -+ let sanity_check = &*null_hook as *const PanicHook; -+ let original_hook = panic::take_hook(); -+ panic::set_hook(null_hook); -+ -+ let works = panic::catch_unwind(proc_macro::Span::call_site).is_ok(); -+ WORKS.store(works as usize + 1, Ordering::SeqCst); -+ -+ let hopefully_null_hook = panic::take_hook(); -+ panic::set_hook(original_hook); -+ if sanity_check != &*hopefully_null_hook { -+ panic!("observed race condition in proc_macro2::inside_proc_macro"); -+ } -+} -diff --git a/third_party/rust/proc-macro2/src/fallback.rs b/third_party/rust/proc-macro2/src/fallback.rs ---- a/third_party/rust/proc-macro2/src/fallback.rs -+++ b/third_party/rust/proc-macro2/src/fallback.rs -@@ -1,41 +1,121 @@ -+use crate::parse::{token_stream, Cursor}; -+use crate::{Delimiter, Spacing, TokenTree}; - #[cfg(span_locations)] - use std::cell::RefCell; - #[cfg(span_locations)] - use std::cmp; --use std::fmt; --use std::iter; -+use std::fmt::{self, Debug, Display}; -+use std::iter::FromIterator; -+use std::mem; - use std::ops::RangeBounds; - #[cfg(procmacro2_semver_exempt)] - use std::path::Path; - use std::path::PathBuf; - use std::str::FromStr; - use std::vec; -- --use crate::strnom::{block_comment, skip_whitespace, whitespace, word_break, Cursor, PResult}; --use crate::{Delimiter, Punct, Spacing, TokenTree}; - use unicode_xid::UnicodeXID; - -+/// Force use of proc-macro2's fallback implementation of the API for now, even -+/// if the compiler's implementation is available. -+pub fn force() { -+ #[cfg(wrap_proc_macro)] -+ crate::detection::force_fallback(); -+} -+ -+/// Resume using the compiler's implementation of the proc macro API if it is -+/// available. -+pub fn unforce() { -+ #[cfg(wrap_proc_macro)] -+ crate::detection::unforce_fallback(); -+} -+ - #[derive(Clone)] --pub struct TokenStream { -- inner: Vec, -+pub(crate) struct TokenStream { -+ pub(crate) inner: Vec, - } - - #[derive(Debug)] --pub struct LexError; -+pub(crate) struct LexError; - - impl TokenStream { - pub fn new() -> TokenStream { - TokenStream { inner: Vec::new() } - } - - pub fn is_empty(&self) -> bool { - self.inner.len() == 0 - } -+ -+ fn take_inner(&mut self) -> Vec { -+ mem::replace(&mut self.inner, Vec::new()) -+ } -+ -+ fn push_token(&mut self, token: TokenTree) { -+ // https://github.com/alexcrichton/proc-macro2/issues/235 -+ match token { -+ #[cfg(not(no_bind_by_move_pattern_guard))] -+ TokenTree::Literal(crate::Literal { -+ #[cfg(wrap_proc_macro)] -+ inner: crate::imp::Literal::Fallback(literal), -+ #[cfg(not(wrap_proc_macro))] -+ inner: literal, -+ .. -+ }) if literal.text.starts_with('-') => { -+ push_negative_literal(self, literal); -+ } -+ #[cfg(no_bind_by_move_pattern_guard)] -+ TokenTree::Literal(crate::Literal { -+ #[cfg(wrap_proc_macro)] -+ inner: crate::imp::Literal::Fallback(literal), -+ #[cfg(not(wrap_proc_macro))] -+ inner: literal, -+ .. -+ }) => { -+ if literal.text.starts_with('-') { -+ push_negative_literal(self, literal); -+ } else { -+ self.inner -+ .push(TokenTree::Literal(crate::Literal::_new_stable(literal))); -+ } -+ } -+ _ => self.inner.push(token), -+ } -+ -+ #[cold] -+ fn push_negative_literal(stream: &mut TokenStream, mut literal: Literal) { -+ literal.text.remove(0); -+ let mut punct = crate::Punct::new('-', Spacing::Alone); -+ punct.set_span(crate::Span::_new_stable(literal.span)); -+ stream.inner.push(TokenTree::Punct(punct)); -+ stream -+ .inner -+ .push(TokenTree::Literal(crate::Literal::_new_stable(literal))); -+ } -+ } -+} -+ -+// Nonrecursive to prevent stack overflow. -+impl Drop for TokenStream { -+ fn drop(&mut self) { -+ while let Some(token) = self.inner.pop() { -+ let group = match token { -+ TokenTree::Group(group) => group.inner, -+ _ => continue, -+ }; -+ #[cfg(wrap_proc_macro)] -+ let group = match group { -+ crate::imp::Group::Fallback(group) => group, -+ _ => continue, -+ }; -+ let mut group = group; -+ self.inner.extend(group.stream.take_inner()); -+ } -+ } - } - - #[cfg(span_locations)] - fn get_cursor(src: &str) -> Cursor { - // Create a dummy file & add it to the source map - SOURCE_MAP.with(|cm| { - let mut cm = cm.borrow_mut(); - let name = format!("", cm.files.len()); -@@ -54,68 +134,49 @@ fn get_cursor(src: &str) -> Cursor { - - impl FromStr for TokenStream { - type Err = LexError; - - fn from_str(src: &str) -> Result { - // Create a dummy file & add it to the source map - let cursor = get_cursor(src); - -- match token_stream(cursor) { -- Ok((input, output)) => { -- if skip_whitespace(input).len() != 0 { -- Err(LexError) -- } else { -- Ok(output) -- } -- } -- Err(LexError) => Err(LexError), -+ let (rest, tokens) = token_stream(cursor)?; -+ if rest.is_empty() { -+ Ok(tokens) -+ } else { -+ Err(LexError) - } - } - } - --impl fmt::Display for TokenStream { -+impl Display for TokenStream { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - let mut joint = false; - for (i, tt) in self.inner.iter().enumerate() { - if i != 0 && !joint { - write!(f, " ")?; - } - joint = false; -- match *tt { -- TokenTree::Group(ref tt) => { -- let (start, end) = match tt.delimiter() { -- Delimiter::Parenthesis => ("(", ")"), -- Delimiter::Brace => ("{", "}"), -- Delimiter::Bracket => ("[", "]"), -- Delimiter::None => ("", ""), -- }; -- if tt.stream().into_iter().next().is_none() { -- write!(f, "{} {}", start, end)? -- } else { -- write!(f, "{} {} {}", start, tt.stream(), end)? -- } -+ match tt { -+ TokenTree::Group(tt) => Display::fmt(tt, f), -+ TokenTree::Ident(tt) => Display::fmt(tt, f), -+ TokenTree::Punct(tt) => { -+ joint = tt.spacing() == Spacing::Joint; -+ Display::fmt(tt, f) - } -- TokenTree::Ident(ref tt) => write!(f, "{}", tt)?, -- TokenTree::Punct(ref tt) => { -- write!(f, "{}", tt.as_char())?; -- match tt.spacing() { -- Spacing::Alone => {} -- Spacing::Joint => joint = true, -- } -- } -- TokenTree::Literal(ref tt) => write!(f, "{}", tt)?, -- } -+ TokenTree::Literal(tt) => Display::fmt(tt, f), -+ }? - } - - Ok(()) - } - } - --impl fmt::Debug for TokenStream { -+impl Debug for TokenStream { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - f.write_str("TokenStream ")?; - f.debug_list().entries(self.clone()).finish() - } - } - - #[cfg(use_proc_macro)] - impl From for TokenStream { -@@ -134,122 +195,107 @@ impl From for proc_macro::T - .to_string() - .parse() - .expect("failed to parse to compiler tokens") - } - } - - impl From for TokenStream { - fn from(tree: TokenTree) -> TokenStream { -- TokenStream { inner: vec![tree] } -+ let mut stream = TokenStream::new(); -+ stream.push_token(tree); -+ stream - } - } - --impl iter::FromIterator for TokenStream { -- fn from_iter>(streams: I) -> Self { -- let mut v = Vec::new(); -- -- for token in streams.into_iter() { -- v.push(token); -- } -- -- TokenStream { inner: v } -+impl FromIterator for TokenStream { -+ fn from_iter>(tokens: I) -> Self { -+ let mut stream = TokenStream::new(); -+ stream.extend(tokens); -+ stream - } - } - --impl iter::FromIterator for TokenStream { -+impl FromIterator for TokenStream { - fn from_iter>(streams: I) -> Self { - let mut v = Vec::new(); - -- for stream in streams.into_iter() { -- v.extend(stream.inner); -+ for mut stream in streams { -+ v.extend(stream.take_inner()); - } - - TokenStream { inner: v } - } - } - - impl Extend for TokenStream { -- fn extend>(&mut self, streams: I) { -- self.inner.extend(streams); -+ fn extend>(&mut self, tokens: I) { -+ tokens.into_iter().for_each(|token| self.push_token(token)); - } - } - - impl Extend for TokenStream { - fn extend>(&mut self, streams: I) { -- self.inner -- .extend(streams.into_iter().flat_map(|stream| stream)); -+ self.inner.extend(streams.into_iter().flatten()); - } - } - --pub type TokenTreeIter = vec::IntoIter; -+pub(crate) type TokenTreeIter = vec::IntoIter; - - impl IntoIterator for TokenStream { - type Item = TokenTree; - type IntoIter = TokenTreeIter; - -- fn into_iter(self) -> TokenTreeIter { -- self.inner.into_iter() -+ fn into_iter(mut self) -> TokenTreeIter { -+ self.take_inner().into_iter() - } - } - - #[derive(Clone, PartialEq, Eq)] --pub struct SourceFile { -+pub(crate) struct SourceFile { - path: PathBuf, - } - - impl SourceFile { - /// Get the path to this source file as a string. - pub fn path(&self) -> PathBuf { - self.path.clone() - } - - pub fn is_real(&self) -> bool { - // XXX(nika): Support real files in the future? - false - } - } - --impl fmt::Debug for SourceFile { -+impl Debug for SourceFile { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - f.debug_struct("SourceFile") - .field("path", &self.path()) - .field("is_real", &self.is_real()) - .finish() - } - } - - #[derive(Clone, Copy, Debug, PartialEq, Eq)] --pub struct LineColumn { -+pub(crate) struct LineColumn { - pub line: usize, - pub column: usize, - } - - #[cfg(span_locations)] - thread_local! { - static SOURCE_MAP: RefCell = RefCell::new(SourceMap { - // NOTE: We start with a single dummy file which all call_site() and - // def_site() spans reference. -- files: vec![{ -+ files: vec![FileInfo { - #[cfg(procmacro2_semver_exempt)] -- { -- FileInfo { -- name: "".to_owned(), -- span: Span { lo: 0, hi: 0 }, -- lines: vec![0], -- } -- } -- -- #[cfg(not(procmacro2_semver_exempt))] -- { -- FileInfo { -- span: Span { lo: 0, hi: 0 }, -- lines: vec![0], -- } -- } -+ name: "".to_owned(), -+ span: Span { lo: 0, hi: 0 }, -+ lines: vec![0], - }], - }); - } - - #[cfg(span_locations)] - struct FileInfo { - #[cfg(procmacro2_semver_exempt)] - name: String, -@@ -277,26 +323,31 @@ impl FileInfo { - } - } - - fn span_within(&self, span: Span) -> bool { - span.lo >= self.span.lo && span.hi <= self.span.hi - } - } - --/// Computesthe offsets of each line in the given source string. -+/// Computes the offsets of each line in the given source string -+/// and the total number of characters - #[cfg(span_locations)] --fn lines_offsets(s: &str) -> Vec { -+fn lines_offsets(s: &str) -> (usize, Vec) { - let mut lines = vec![0]; -- let mut prev = 0; -- while let Some(len) = s[prev..].find('\n') { -- prev += len + 1; -- lines.push(prev); -+ let mut total = 0; -+ -+ for ch in s.chars() { -+ total += 1; -+ if ch == '\n' { -+ lines.push(total); -+ } - } -- lines -+ -+ (total, lines) - } - - #[cfg(span_locations)] - struct SourceMap { - files: Vec, - } - - #[cfg(span_locations)] -@@ -305,81 +356,83 @@ impl SourceMap { - // Add 1 so there's always space between files. - // - // We'll always have at least 1 file, as we initialize our files list - // with a dummy file. - self.files.last().unwrap().span.hi + 1 - } - - fn add_file(&mut self, name: &str, src: &str) -> Span { -- let lines = lines_offsets(src); -+ let (len, lines) = lines_offsets(src); - let lo = self.next_start_pos(); - // XXX(nika): Shouild we bother doing a checked cast or checked add here? - let span = Span { - lo, -- hi: lo + (src.len() as u32), -+ hi: lo + (len as u32), - }; - -- #[cfg(procmacro2_semver_exempt)] - self.files.push(FileInfo { -+ #[cfg(procmacro2_semver_exempt)] - name: name.to_owned(), - span, - lines, - }); - - #[cfg(not(procmacro2_semver_exempt))] -- self.files.push(FileInfo { span, lines }); - let _ = name; - - span - } - - fn fileinfo(&self, span: Span) -> &FileInfo { - for file in &self.files { - if file.span_within(span) { - return file; - } - } - panic!("Invalid span with no related FileInfo!"); - } - } - - #[derive(Clone, Copy, PartialEq, Eq)] --pub struct Span { -+pub(crate) struct Span { - #[cfg(span_locations)] -- lo: u32, -+ pub(crate) lo: u32, - #[cfg(span_locations)] -- hi: u32, -+ pub(crate) hi: u32, - } - - impl Span { - #[cfg(not(span_locations))] - pub fn call_site() -> Span { - Span {} - } - - #[cfg(span_locations)] - pub fn call_site() -> Span { - Span { lo: 0, hi: 0 } - } - -+ #[cfg(hygiene)] -+ pub fn mixed_site() -> Span { -+ Span::call_site() -+ } -+ - #[cfg(procmacro2_semver_exempt)] - pub fn def_site() -> Span { - Span::call_site() - } - -- #[cfg(procmacro2_semver_exempt)] - pub fn resolved_at(&self, _other: Span) -> Span { - // Stable spans consist only of line/column information, so - // `resolved_at` and `located_at` only select which span the - // caller wants line/column information from. - *self - } - -- #[cfg(procmacro2_semver_exempt)] - pub fn located_at(&self, other: Span) -> Span { - other - } - - #[cfg(procmacro2_semver_exempt)] - pub fn source_file(&self) -> SourceFile { - SOURCE_MAP.with(|cm| { - let cm = cm.borrow(); -@@ -422,36 +475,69 @@ impl Span { - return None; - } - Some(Span { - lo: cmp::min(self.lo, other.lo), - hi: cmp::max(self.hi, other.hi), - }) - }) - } -+ -+ #[cfg(not(span_locations))] -+ fn first_byte(self) -> Self { -+ self -+ } -+ -+ #[cfg(span_locations)] -+ fn first_byte(self) -> Self { -+ Span { -+ lo: self.lo, -+ hi: cmp::min(self.lo.saturating_add(1), self.hi), -+ } -+ } -+ -+ #[cfg(not(span_locations))] -+ fn last_byte(self) -> Self { -+ self -+ } -+ -+ #[cfg(span_locations)] -+ fn last_byte(self) -> Self { -+ Span { -+ lo: cmp::max(self.hi.saturating_sub(1), self.lo), -+ hi: self.hi, -+ } -+ } - } - --impl fmt::Debug for Span { -+impl Debug for Span { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { -- #[cfg(procmacro2_semver_exempt)] -+ #[cfg(span_locations)] - return write!(f, "bytes({}..{})", self.lo, self.hi); - -- #[cfg(not(procmacro2_semver_exempt))] -+ #[cfg(not(span_locations))] - write!(f, "Span") - } - } - --pub fn debug_span_field_if_nontrivial(debug: &mut fmt::DebugStruct, span: Span) { -- if cfg!(procmacro2_semver_exempt) { -+pub(crate) fn debug_span_field_if_nontrivial(debug: &mut fmt::DebugStruct, span: Span) { -+ #[cfg(span_locations)] -+ { -+ if span.lo == 0 && span.hi == 0 { -+ return; -+ } -+ } -+ -+ if cfg!(span_locations) { - debug.field("span", &span); - } - } - - #[derive(Clone)] --pub struct Group { -+pub(crate) struct Group { - delimiter: Delimiter, - stream: TokenStream, - span: Span, - } - - impl Group { - pub fn new(delimiter: Delimiter, stream: TokenStream) -> Group { - Group { -@@ -469,58 +555,67 @@ impl Group { - self.stream.clone() - } - - pub fn span(&self) -> Span { - self.span - } - - pub fn span_open(&self) -> Span { -- self.span -+ self.span.first_byte() - } - - pub fn span_close(&self) -> Span { -- self.span -+ self.span.last_byte() - } - - pub fn set_span(&mut self, span: Span) { - self.span = span; - } - } - --impl fmt::Display for Group { -+impl Display for Group { -+ // We attempt to match libproc_macro's formatting. -+ // Empty parens: () -+ // Nonempty parens: (...) -+ // Empty brackets: [] -+ // Nonempty brackets: [...] -+ // Empty braces: { } -+ // Nonempty braces: { ... } - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { -- let (left, right) = match self.delimiter { -+ let (open, close) = match self.delimiter { - Delimiter::Parenthesis => ("(", ")"), -- Delimiter::Brace => ("{", "}"), -+ Delimiter::Brace => ("{ ", "}"), - Delimiter::Bracket => ("[", "]"), - Delimiter::None => ("", ""), - }; - -- f.write_str(left)?; -- self.stream.fmt(f)?; -- f.write_str(right)?; -+ f.write_str(open)?; -+ Display::fmt(&self.stream, f)?; -+ if self.delimiter == Delimiter::Brace && !self.stream.inner.is_empty() { -+ f.write_str(" ")?; -+ } -+ f.write_str(close)?; - - Ok(()) - } - } - --impl fmt::Debug for Group { -+impl Debug for Group { - fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result { - let mut debug = fmt.debug_struct("Group"); - debug.field("delimiter", &self.delimiter); - debug.field("stream", &self.stream); -- #[cfg(procmacro2_semver_exempt)] -- debug.field("span", &self.span); -+ debug_span_field_if_nontrivial(&mut debug, self.span); - debug.finish() - } - } - - #[derive(Clone)] --pub struct Ident { -+pub(crate) struct Ident { - sym: String, - span: Span, - raw: bool, - } - - impl Ident { - fn _new(string: &str, raw: bool, span: Span) -> Ident { - validate_ident(string); -@@ -544,26 +639,24 @@ impl Ident { - self.span - } - - pub fn set_span(&mut self, span: Span) { - self.span = span; - } - } - --#[inline] --fn is_ident_start(c: char) -> bool { -+pub(crate) fn is_ident_start(c: char) -> bool { - ('a' <= c && c <= 'z') - || ('A' <= c && c <= 'Z') - || c == '_' - || (c > '\x7f' && UnicodeXID::is_xid_start(c)) - } - --#[inline] --fn is_ident_continue(c: char) -> bool { -+pub(crate) fn is_ident_continue(c: char) -> bool { - ('a' <= c && c <= 'z') - || ('A' <= c && c <= 'Z') - || c == '_' - || ('0' <= c && c <= '9') - || (c > '\x7f' && UnicodeXID::is_xid_continue(c)) - } - - fn validate_ident(string: &str) { -@@ -610,49 +703,49 @@ where - if self.raw { - other.starts_with("r#") && self.sym == other[2..] - } else { - self.sym == other - } - } - } - --impl fmt::Display for Ident { -+impl Display for Ident { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - if self.raw { -- "r#".fmt(f)?; -+ f.write_str("r#")?; - } -- self.sym.fmt(f) -+ Display::fmt(&self.sym, f) - } - } - --impl fmt::Debug for Ident { -+impl Debug for Ident { - // Ident(proc_macro), Ident(r#union) -- #[cfg(not(procmacro2_semver_exempt))] -+ #[cfg(not(span_locations))] - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - let mut debug = f.debug_tuple("Ident"); - debug.field(&format_args!("{}", self)); - debug.finish() - } - - // Ident { - // sym: proc_macro, - // span: bytes(128..138) - // } -- #[cfg(procmacro2_semver_exempt)] -+ #[cfg(span_locations)] - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - let mut debug = f.debug_struct("Ident"); - debug.field("sym", &format_args!("{}", self)); -- debug.field("span", &self.span); -+ debug_span_field_if_nontrivial(&mut debug, self.span); - debug.finish() - } - } - - #[derive(Clone)] --pub struct Literal { -+pub(crate) struct Literal { - text: String, - span: Span, - } - - macro_rules! suffixed_numbers { - ($($name:ident => $kind:ident,)*) => ($( - pub fn $name(n: $kind) -> Literal { - Literal::_new(format!(concat!("{}", stringify!($kind)), n)) -@@ -664,17 +757,17 @@ macro_rules! unsuffixed_numbers { - ($($name:ident => $kind:ident,)*) => ($( - pub fn $name(n: $kind) -> Literal { - Literal::_new(n.to_string()) - } - )*) - } - - impl Literal { -- fn _new(text: String) -> Literal { -+ pub(crate) fn _new(text: String) -> Literal { - Literal { - text, - span: Span::call_site(), - } - } - - suffixed_numbers! { - u8_suffixed => u8, -@@ -706,61 +799,62 @@ impl Literal { - i32_unsuffixed => i32, - i64_unsuffixed => i64, - i128_unsuffixed => i128, - isize_unsuffixed => isize, - } - - pub fn f32_unsuffixed(f: f32) -> Literal { - let mut s = f.to_string(); -- if !s.contains(".") { -+ if !s.contains('.') { - s.push_str(".0"); - } - Literal::_new(s) - } - - pub fn f64_unsuffixed(f: f64) -> Literal { - let mut s = f.to_string(); -- if !s.contains(".") { -+ if !s.contains('.') { - s.push_str(".0"); - } - Literal::_new(s) - } - - pub fn string(t: &str) -> Literal { - let mut text = String::with_capacity(t.len() + 2); - text.push('"'); - for c in t.chars() { - if c == '\'' { -- // escape_default turns this into "\'" which is unnecessary. -+ // escape_debug turns this into "\'" which is unnecessary. - text.push(c); - } else { -- text.extend(c.escape_default()); -+ text.extend(c.escape_debug()); - } - } - text.push('"'); - Literal::_new(text) - } - - pub fn character(t: char) -> Literal { - let mut text = String::new(); - text.push('\''); - if t == '"' { -- // escape_default turns this into '\"' which is unnecessary. -+ // escape_debug turns this into '\"' which is unnecessary. - text.push(t); - } else { -- text.extend(t.escape_default()); -+ text.extend(t.escape_debug()); - } - text.push('\''); - Literal::_new(text) - } - - pub fn byte_string(bytes: &[u8]) -> Literal { - let mut escaped = "b\"".to_string(); - for b in bytes { -+ #[allow(clippy::match_overlapping_arm)] - match *b { - b'\0' => escaped.push_str(r"\0"), - b'\t' => escaped.push_str(r"\t"), - b'\n' => escaped.push_str(r"\n"), - b'\r' => escaped.push_str(r"\r"), - b'"' => escaped.push_str("\\\""), - b'\\' => escaped.push_str("\\\\"), - b'\x20'..=b'\x7E' => escaped.push(*b as char), -@@ -779,656 +873,22 @@ impl Literal { - self.span = span; - } - - pub fn subspan>(&self, _range: R) -> Option { - None - } - } - --impl fmt::Display for Literal { -+impl Display for Literal { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { -- self.text.fmt(f) -- } --} -- --impl fmt::Debug for Literal { -- fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result { -- let mut debug = fmt.debug_struct("Literal"); -- debug.field("lit", &format_args!("{}", self.text)); -- #[cfg(procmacro2_semver_exempt)] -- debug.field("span", &self.span); -- debug.finish() -- } --} -- --fn token_stream(mut input: Cursor) -> PResult { -- let mut trees = Vec::new(); -- loop { -- let input_no_ws = skip_whitespace(input); -- if input_no_ws.rest.len() == 0 { -- break; -- } -- if let Ok((a, tokens)) = doc_comment(input_no_ws) { -- input = a; -- trees.extend(tokens); -- continue; -- } -- -- let (a, tt) = match token_tree(input_no_ws) { -- Ok(p) => p, -- Err(_) => break, -- }; -- trees.push(tt); -- input = a; -- } -- Ok((input, TokenStream { inner: trees })) --} -- --#[cfg(not(span_locations))] --fn spanned<'a, T>( -- input: Cursor<'a>, -- f: fn(Cursor<'a>) -> PResult<'a, T>, --) -> PResult<'a, (T, crate::Span)> { -- let (a, b) = f(skip_whitespace(input))?; -- Ok((a, ((b, crate::Span::_new_stable(Span::call_site()))))) --} -- --#[cfg(span_locations)] --fn spanned<'a, T>( -- input: Cursor<'a>, -- f: fn(Cursor<'a>) -> PResult<'a, T>, --) -> PResult<'a, (T, crate::Span)> { -- let input = skip_whitespace(input); -- let lo = input.off; -- let (a, b) = f(input)?; -- let hi = a.off; -- let span = crate::Span::_new_stable(Span { lo, hi }); -- Ok((a, (b, span))) --} -- --fn token_tree(input: Cursor) -> PResult { -- let (rest, (mut tt, span)) = spanned(input, token_kind)?; -- tt.set_span(span); -- Ok((rest, tt)) --} -- --named!(token_kind -> TokenTree, alt!( -- map!(group, |g| TokenTree::Group(crate::Group::_new_stable(g))) -- | -- map!(literal, |l| TokenTree::Literal(crate::Literal::_new_stable(l))) // must be before symbol -- | -- map!(op, TokenTree::Punct) -- | -- symbol_leading_ws --)); -- --named!(group -> Group, alt!( -- delimited!( -- punct!("("), -- token_stream, -- punct!(")") -- ) => { |ts| Group::new(Delimiter::Parenthesis, ts) } -- | -- delimited!( -- punct!("["), -- token_stream, -- punct!("]") -- ) => { |ts| Group::new(Delimiter::Bracket, ts) } -- | -- delimited!( -- punct!("{"), -- token_stream, -- punct!("}") -- ) => { |ts| Group::new(Delimiter::Brace, ts) } --)); -- --fn symbol_leading_ws(input: Cursor) -> PResult { -- symbol(skip_whitespace(input)) --} -- --fn symbol(input: Cursor) -> PResult { -- let raw = input.starts_with("r#"); -- let rest = input.advance((raw as usize) << 1); -- -- let (rest, sym) = symbol_not_raw(rest)?; -- -- if !raw { -- let ident = crate::Ident::new(sym, crate::Span::call_site()); -- return Ok((rest, ident.into())); -- } -- -- if sym == "_" { -- return Err(LexError); -- } -- -- let ident = crate::Ident::_new_raw(sym, crate::Span::call_site()); -- Ok((rest, ident.into())) --} -- --fn symbol_not_raw(input: Cursor) -> PResult<&str> { -- let mut chars = input.char_indices(); -- -- match chars.next() { -- Some((_, ch)) if is_ident_start(ch) => {} -- _ => return Err(LexError), -- } -- -- let mut end = input.len(); -- for (i, ch) in chars { -- if !is_ident_continue(ch) { -- end = i; -- break; -- } -- } -- -- Ok((input.advance(end), &input.rest[..end])) --} -- --fn literal(input: Cursor) -> PResult { -- let input_no_ws = skip_whitespace(input); -- -- match literal_nocapture(input_no_ws) { -- Ok((a, ())) => { -- let start = input.len() - input_no_ws.len(); -- let len = input_no_ws.len() - a.len(); -- let end = start + len; -- Ok((a, Literal::_new(input.rest[start..end].to_string()))) -- } -- Err(LexError) => Err(LexError), -+ Display::fmt(&self.text, f) - } - } - --named!(literal_nocapture -> (), alt!( -- string -- | -- byte_string -- | -- byte -- | -- character -- | -- float -- | -- int --)); -- --named!(string -> (), alt!( -- quoted_string -- | -- preceded!( -- punct!("r"), -- raw_string -- ) => { |_| () } --)); -- --named!(quoted_string -> (), do_parse!( -- punct!("\"") >> -- cooked_string >> -- tag!("\"") >> -- option!(symbol_not_raw) >> -- (()) --)); -- --fn cooked_string(input: Cursor) -> PResult<()> { -- let mut chars = input.char_indices().peekable(); -- while let Some((byte_offset, ch)) = chars.next() { -- match ch { -- '"' => { -- return Ok((input.advance(byte_offset), ())); -- } -- '\r' => { -- if let Some((_, '\n')) = chars.next() { -- // ... -- } else { -- break; -- } -- } -- '\\' => match chars.next() { -- Some((_, 'x')) => { -- if !backslash_x_char(&mut chars) { -- break; -- } -- } -- Some((_, 'n')) | Some((_, 'r')) | Some((_, 't')) | Some((_, '\\')) -- | Some((_, '\'')) | Some((_, '"')) | Some((_, '0')) => {} -- Some((_, 'u')) => { -- if !backslash_u(&mut chars) { -- break; -- } -- } -- Some((_, '\n')) | Some((_, '\r')) => { -- while let Some(&(_, ch)) = chars.peek() { -- if ch.is_whitespace() { -- chars.next(); -- } else { -- break; -- } -- } -- } -- _ => break, -- }, -- _ch => {} -- } -- } -- Err(LexError) --} -- --named!(byte_string -> (), alt!( -- delimited!( -- punct!("b\""), -- cooked_byte_string, -- tag!("\"") -- ) => { |_| () } -- | -- preceded!( -- punct!("br"), -- raw_string -- ) => { |_| () } --)); -- --fn cooked_byte_string(mut input: Cursor) -> PResult<()> { -- let mut bytes = input.bytes().enumerate(); -- 'outer: while let Some((offset, b)) = bytes.next() { -- match b { -- b'"' => { -- return Ok((input.advance(offset), ())); -- } -- b'\r' => { -- if let Some((_, b'\n')) = bytes.next() { -- // ... -- } else { -- break; -- } -- } -- b'\\' => match bytes.next() { -- Some((_, b'x')) => { -- if !backslash_x_byte(&mut bytes) { -- break; -- } -- } -- Some((_, b'n')) | Some((_, b'r')) | Some((_, b't')) | Some((_, b'\\')) -- | Some((_, b'0')) | Some((_, b'\'')) | Some((_, b'"')) => {} -- Some((newline, b'\n')) | Some((newline, b'\r')) => { -- let rest = input.advance(newline + 1); -- for (offset, ch) in rest.char_indices() { -- if !ch.is_whitespace() { -- input = rest.advance(offset); -- bytes = input.bytes().enumerate(); -- continue 'outer; -- } -- } -- break; -- } -- _ => break, -- }, -- b if b < 0x80 => {} -- _ => break, -- } -- } -- Err(LexError) --} -- --fn raw_string(input: Cursor) -> PResult<()> { -- let mut chars = input.char_indices(); -- let mut n = 0; -- while let Some((byte_offset, ch)) = chars.next() { -- match ch { -- '"' => { -- n = byte_offset; -- break; -- } -- '#' => {} -- _ => return Err(LexError), -- } -- } -- for (byte_offset, ch) in chars { -- match ch { -- '"' if input.advance(byte_offset + 1).starts_with(&input.rest[..n]) => { -- let rest = input.advance(byte_offset + 1 + n); -- return Ok((rest, ())); -- } -- '\r' => {} -- _ => {} -- } -- } -- Err(LexError) --} -- --named!(byte -> (), do_parse!( -- punct!("b") >> -- tag!("'") >> -- cooked_byte >> -- tag!("'") >> -- (()) --)); -- --fn cooked_byte(input: Cursor) -> PResult<()> { -- let mut bytes = input.bytes().enumerate(); -- let ok = match bytes.next().map(|(_, b)| b) { -- Some(b'\\') => match bytes.next().map(|(_, b)| b) { -- Some(b'x') => backslash_x_byte(&mut bytes), -- Some(b'n') | Some(b'r') | Some(b't') | Some(b'\\') | Some(b'0') | Some(b'\'') -- | Some(b'"') => true, -- _ => false, -- }, -- b => b.is_some(), -- }; -- if ok { -- match bytes.next() { -- Some((offset, _)) => { -- if input.chars().as_str().is_char_boundary(offset) { -- Ok((input.advance(offset), ())) -- } else { -- Err(LexError) -- } -- } -- None => Ok((input.advance(input.len()), ())), -- } -- } else { -- Err(LexError) -- } --} -- --named!(character -> (), do_parse!( -- punct!("'") >> -- cooked_char >> -- tag!("'") >> -- (()) --)); -- --fn cooked_char(input: Cursor) -> PResult<()> { -- let mut chars = input.char_indices(); -- let ok = match chars.next().map(|(_, ch)| ch) { -- Some('\\') => match chars.next().map(|(_, ch)| ch) { -- Some('x') => backslash_x_char(&mut chars), -- Some('u') => backslash_u(&mut chars), -- Some('n') | Some('r') | Some('t') | Some('\\') | Some('0') | Some('\'') | Some('"') => { -- true -- } -- _ => false, -- }, -- ch => ch.is_some(), -- }; -- if ok { -- match chars.next() { -- Some((idx, _)) => Ok((input.advance(idx), ())), -- None => Ok((input.advance(input.len()), ())), -- } -- } else { -- Err(LexError) -+impl Debug for Literal { -+ fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result { -+ let mut debug = fmt.debug_struct("Literal"); -+ debug.field("lit", &format_args!("{}", self.text)); -+ debug_span_field_if_nontrivial(&mut debug, self.span); -+ debug.finish() - } - } -- --macro_rules! next_ch { -- ($chars:ident @ $pat:pat $(| $rest:pat)*) => { -- match $chars.next() { -- Some((_, ch)) => match ch { -- $pat $(| $rest)* => ch, -- _ => return false, -- }, -- None => return false -- } -- }; --} -- --fn backslash_x_char(chars: &mut I) -> bool --where -- I: Iterator, --{ -- next_ch!(chars @ '0'..='7'); -- next_ch!(chars @ '0'..='9' | 'a'..='f' | 'A'..='F'); -- true --} -- --fn backslash_x_byte(chars: &mut I) -> bool --where -- I: Iterator, --{ -- next_ch!(chars @ b'0'..=b'9' | b'a'..=b'f' | b'A'..=b'F'); -- next_ch!(chars @ b'0'..=b'9' | b'a'..=b'f' | b'A'..=b'F'); -- true --} -- --fn backslash_u(chars: &mut I) -> bool --where -- I: Iterator, --{ -- next_ch!(chars @ '{'); -- next_ch!(chars @ '0'..='9' | 'a'..='f' | 'A'..='F'); -- loop { -- let c = next_ch!(chars @ '0'..='9' | 'a'..='f' | 'A'..='F' | '_' | '}'); -- if c == '}' { -- return true; -- } -- } --} -- --fn float(input: Cursor) -> PResult<()> { -- let (mut rest, ()) = float_digits(input)?; -- if let Some(ch) = rest.chars().next() { -- if is_ident_start(ch) { -- rest = symbol_not_raw(rest)?.0; -- } -- } -- word_break(rest) --} -- --fn float_digits(input: Cursor) -> PResult<()> { -- let mut chars = input.chars().peekable(); -- match chars.next() { -- Some(ch) if ch >= '0' && ch <= '9' => {} -- _ => return Err(LexError), -- } -- -- let mut len = 1; -- let mut has_dot = false; -- let mut has_exp = false; -- while let Some(&ch) = chars.peek() { -- match ch { -- '0'..='9' | '_' => { -- chars.next(); -- len += 1; -- } -- '.' => { -- if has_dot { -- break; -- } -- chars.next(); -- if chars -- .peek() -- .map(|&ch| ch == '.' || is_ident_start(ch)) -- .unwrap_or(false) -- { -- return Err(LexError); -- } -- len += 1; -- has_dot = true; -- } -- 'e' | 'E' => { -- chars.next(); -- len += 1; -- has_exp = true; -- break; -- } -- _ => break, -- } -- } -- -- let rest = input.advance(len); -- if !(has_dot || has_exp || rest.starts_with("f32") || rest.starts_with("f64")) { -- return Err(LexError); -- } -- -- if has_exp { -- let mut has_exp_value = false; -- while let Some(&ch) = chars.peek() { -- match ch { -- '+' | '-' => { -- if has_exp_value { -- break; -- } -- chars.next(); -- len += 1; -- } -- '0'..='9' => { -- chars.next(); -- len += 1; -- has_exp_value = true; -- } -- '_' => { -- chars.next(); -- len += 1; -- } -- _ => break, -- } -- } -- if !has_exp_value { -- return Err(LexError); -- } -- } -- -- Ok((input.advance(len), ())) --} -- --fn int(input: Cursor) -> PResult<()> { -- let (mut rest, ()) = digits(input)?; -- if let Some(ch) = rest.chars().next() { -- if is_ident_start(ch) { -- rest = symbol_not_raw(rest)?.0; -- } -- } -- word_break(rest) --} -- --fn digits(mut input: Cursor) -> PResult<()> { -- let base = if input.starts_with("0x") { -- input = input.advance(2); -- 16 -- } else if input.starts_with("0o") { -- input = input.advance(2); -- 8 -- } else if input.starts_with("0b") { -- input = input.advance(2); -- 2 -- } else { -- 10 -- }; -- -- let mut len = 0; -- let mut empty = true; -- for b in input.bytes() { -- let digit = match b { -- b'0'..=b'9' => (b - b'0') as u64, -- b'a'..=b'f' => 10 + (b - b'a') as u64, -- b'A'..=b'F' => 10 + (b - b'A') as u64, -- b'_' => { -- if empty && base == 10 { -- return Err(LexError); -- } -- len += 1; -- continue; -- } -- _ => break, -- }; -- if digit >= base { -- return Err(LexError); -- } -- len += 1; -- empty = false; -- } -- if empty { -- Err(LexError) -- } else { -- Ok((input.advance(len), ())) -- } --} -- --fn op(input: Cursor) -> PResult { -- let input = skip_whitespace(input); -- match op_char(input) { -- Ok((rest, '\'')) => { -- symbol(rest)?; -- Ok((rest, Punct::new('\'', Spacing::Joint))) -- } -- Ok((rest, ch)) => { -- let kind = match op_char(rest) { -- Ok(_) => Spacing::Joint, -- Err(LexError) => Spacing::Alone, -- }; -- Ok((rest, Punct::new(ch, kind))) -- } -- Err(LexError) => Err(LexError), -- } --} -- --fn op_char(input: Cursor) -> PResult { -- if input.starts_with("//") || input.starts_with("/*") { -- // Do not accept `/` of a comment as an op. -- return Err(LexError); -- } -- -- let mut chars = input.chars(); -- let first = match chars.next() { -- Some(ch) => ch, -- None => { -- return Err(LexError); -- } -- }; -- let recognized = "~!@#$%^&*-=+|;:,<.>/?'"; -- if recognized.contains(first) { -- Ok((input.advance(first.len_utf8()), first)) -- } else { -- Err(LexError) -- } --} -- --fn doc_comment(input: Cursor) -> PResult> { -- let mut trees = Vec::new(); -- let (rest, ((comment, inner), span)) = spanned(input, doc_comment_contents)?; -- trees.push(TokenTree::Punct(Punct::new('#', Spacing::Alone))); -- if inner { -- trees.push(Punct::new('!', Spacing::Alone).into()); -- } -- let mut stream = vec![ -- TokenTree::Ident(crate::Ident::new("doc", span)), -- TokenTree::Punct(Punct::new('=', Spacing::Alone)), -- TokenTree::Literal(crate::Literal::string(comment)), -- ]; -- for tt in stream.iter_mut() { -- tt.set_span(span); -- } -- let group = Group::new(Delimiter::Bracket, stream.into_iter().collect()); -- trees.push(crate::Group::_new_stable(group).into()); -- for tt in trees.iter_mut() { -- tt.set_span(span); -- } -- Ok((rest, trees)) --} -- --named!(doc_comment_contents -> (&str, bool), alt!( -- do_parse!( -- punct!("//!") >> -- s: take_until_newline_or_eof!() >> -- ((s, true)) -- ) -- | -- do_parse!( -- option!(whitespace) >> -- peek!(tag!("/*!")) >> -- s: block_comment >> -- ((s, true)) -- ) -- | -- do_parse!( -- punct!("///") >> -- not!(tag!("/")) >> -- s: take_until_newline_or_eof!() >> -- ((s, false)) -- ) -- | -- do_parse!( -- option!(whitespace) >> -- peek!(tuple!(tag!("/**"), not!(tag!("*")))) >> -- s: block_comment >> -- ((s, false)) -- ) --)); -diff --git a/third_party/rust/proc-macro2/src/lib.rs b/third_party/rust/proc-macro2/src/lib.rs ---- a/third_party/rust/proc-macro2/src/lib.rs -+++ b/third_party/rust/proc-macro2/src/lib.rs -@@ -73,37 +73,44 @@ - //! - //! # Thread-Safety - //! - //! Most types in this crate are `!Sync` because the underlying compiler - //! types make use of thread-local memory, meaning they cannot be accessed from - //! a different thread. - - // Proc-macro2 types in rustdoc of other crates get linked to here. --#![doc(html_root_url = "https://docs.rs/proc-macro2/1.0.5")] -+#![doc(html_root_url = "https://docs.rs/proc-macro2/1.0.20")] - #![cfg_attr(any(proc_macro_span, super_unstable), feature(proc_macro_span))] - #![cfg_attr(super_unstable, feature(proc_macro_raw_ident, proc_macro_def_site))] -+#![allow(clippy::needless_doctest_main)] - - #[cfg(use_proc_macro)] - extern crate proc_macro; - - use std::cmp::Ordering; --use std::fmt; -+use std::fmt::{self, Debug, Display}; - use std::hash::{Hash, Hasher}; - use std::iter::FromIterator; - use std::marker; - use std::ops::RangeBounds; - #[cfg(procmacro2_semver_exempt)] - use std::path::PathBuf; - use std::rc::Rc; - use std::str::FromStr; - --#[macro_use] --mod strnom; --mod fallback; -+mod parse; -+ -+#[cfg(wrap_proc_macro)] -+mod detection; -+ -+// Public for proc_macro2::fallback::force() and unforce(), but those are quite -+// a niche use case so we omit it from rustdoc. -+#[doc(hidden)] -+pub mod fallback; - - #[cfg(not(wrap_proc_macro))] - use crate::fallback as imp; - #[path = "wrapper.rs"] - #[cfg(wrap_proc_macro)] - mod imp; - - /// An abstract stream of tokens, or more concretely a sequence of token trees. -@@ -223,32 +230,32 @@ impl FromIterator for Token - TokenStream::_new(streams.into_iter().map(|i| i.inner).collect()) - } - } - - /// Prints the token stream as a string that is supposed to be losslessly - /// convertible back into the same token stream (modulo spans), except for - /// possibly `TokenTree::Group`s with `Delimiter::None` delimiters and negative - /// numeric literals. --impl fmt::Display for TokenStream { -+impl Display for TokenStream { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { -- self.inner.fmt(f) -+ Display::fmt(&self.inner, f) - } - } - - /// Prints token in a form convenient for debugging. --impl fmt::Debug for TokenStream { -+impl Debug for TokenStream { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { -- self.inner.fmt(f) -+ Debug::fmt(&self.inner, f) - } - } - --impl fmt::Debug for LexError { -+impl Debug for LexError { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { -- self.inner.fmt(f) -+ Debug::fmt(&self.inner, f) - } - } - - /// The source file of a given `Span`. - /// - /// This type is semver exempt and not exposed by default. - #[cfg(procmacro2_semver_exempt)] - #[derive(Clone, PartialEq, Eq)] -@@ -286,19 +293,19 @@ impl SourceFile { - /// Returns `true` if this source file is a real source file, and not - /// generated by an external macro's expansion. - pub fn is_real(&self) -> bool { - self.inner.is_real() - } - } - - #[cfg(procmacro2_semver_exempt)] --impl fmt::Debug for SourceFile { -+impl Debug for SourceFile { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { -- self.inner.fmt(f) -+ Debug::fmt(&self.inner, f) - } - } - - /// A line-column pair representing the start or end of a `Span`. - /// - /// This type is semver exempt and not exposed by default. - #[cfg(span_locations)] - #[derive(Copy, Clone, Debug, PartialEq, Eq)] -@@ -306,16 +313,32 @@ pub struct LineColumn { - /// The 1-indexed line in the source file on which the span starts or ends - /// (inclusive). - pub line: usize, - /// The 0-indexed column (in UTF-8 characters) in the source file on which - /// the span starts or ends (inclusive). - pub column: usize, - } - -+#[cfg(span_locations)] -+impl Ord for LineColumn { -+ fn cmp(&self, other: &Self) -> Ordering { -+ self.line -+ .cmp(&other.line) -+ .then(self.column.cmp(&other.column)) -+ } -+} -+ -+#[cfg(span_locations)] -+impl PartialOrd for LineColumn { -+ fn partial_cmp(&self, other: &Self) -> Option { -+ Some(self.cmp(other)) -+ } -+} -+ - /// A region of source code, along with macro expansion information. - #[derive(Copy, Clone)] - pub struct Span { - inner: imp::Span, - _marker: marker::PhantomData>, - } - - impl Span { -@@ -337,38 +360,42 @@ impl Span { - /// - /// Identifiers created with this span will be resolved as if they were - /// written directly at the macro call location (call-site hygiene) and - /// other code at the macro call site will be able to refer to them as well. - pub fn call_site() -> Span { - Span::_new(imp::Span::call_site()) - } - -+ /// The span located at the invocation of the procedural macro, but with -+ /// local variables, labels, and `$crate` resolved at the definition site -+ /// of the macro. This is the same hygiene behavior as `macro_rules`. -+ /// -+ /// This function requires Rust 1.45 or later. -+ #[cfg(hygiene)] -+ pub fn mixed_site() -> Span { -+ Span::_new(imp::Span::mixed_site()) -+ } -+ - /// A span that resolves at the macro definition site. - /// - /// This method is semver exempt and not exposed by default. - #[cfg(procmacro2_semver_exempt)] - pub fn def_site() -> Span { - Span::_new(imp::Span::def_site()) - } - - /// Creates a new span with the same line/column information as `self` but - /// that resolves symbols as though it were at `other`. -- /// -- /// This method is semver exempt and not exposed by default. -- #[cfg(procmacro2_semver_exempt)] - pub fn resolved_at(&self, other: Span) -> Span { - Span::_new(self.inner.resolved_at(other.inner)) - } - - /// Creates a new span with the same name resolution behavior as `self` but - /// with the line/column information of `other`. -- /// -- /// This method is semver exempt and not exposed by default. -- #[cfg(procmacro2_semver_exempt)] - pub fn located_at(&self, other: Span) -> Span { - Span::_new(self.inner.located_at(other.inner)) - } - - /// Convert `proc_macro2::Span` to `proc_macro::Span`. - /// - /// This method is available when building with a nightly compiler, or when - /// building with rustc 1.29+ *without* semver exempt features. -@@ -434,19 +461,19 @@ impl Span { - /// This method is semver exempt and not exposed by default. - #[cfg(procmacro2_semver_exempt)] - pub fn eq(&self, other: &Span) -> bool { - self.inner.eq(&other.inner) - } - } - - /// Prints a span in a form convenient for debugging. --impl fmt::Debug for Span { -+impl Debug for Span { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { -- self.inner.fmt(f) -+ Debug::fmt(&self.inner, f) - } - } - - /// A single token or a delimited sequence of token trees (e.g. `[1, (), ..]`). - #[derive(Clone)] - pub enum TokenTree { - /// A token stream surrounded by bracket delimiters. - Group(Group), -@@ -457,35 +484,35 @@ pub enum TokenTree { - /// A literal character (`'a'`), string (`"hello"`), number (`2.3`), etc. - Literal(Literal), - } - - impl TokenTree { - /// Returns the span of this tree, delegating to the `span` method of - /// the contained token or a delimited stream. - pub fn span(&self) -> Span { -- match *self { -- TokenTree::Group(ref t) => t.span(), -- TokenTree::Ident(ref t) => t.span(), -- TokenTree::Punct(ref t) => t.span(), -- TokenTree::Literal(ref t) => t.span(), -+ match self { -+ TokenTree::Group(t) => t.span(), -+ TokenTree::Ident(t) => t.span(), -+ TokenTree::Punct(t) => t.span(), -+ TokenTree::Literal(t) => t.span(), - } - } - - /// Configures the span for *only this token*. - /// - /// Note that if this token is a `Group` then this method will not configure - /// the span of each of the internal tokens, this will simply delegate to - /// the `set_span` method of each variant. - pub fn set_span(&mut self, span: Span) { -- match *self { -- TokenTree::Group(ref mut t) => t.set_span(span), -- TokenTree::Ident(ref mut t) => t.set_span(span), -- TokenTree::Punct(ref mut t) => t.set_span(span), -- TokenTree::Literal(ref mut t) => t.set_span(span), -+ match self { -+ TokenTree::Group(t) => t.set_span(span), -+ TokenTree::Ident(t) => t.set_span(span), -+ TokenTree::Punct(t) => t.set_span(span), -+ TokenTree::Literal(t) => t.set_span(span), - } - } - } - - impl From for TokenTree { - fn from(g: Group) -> TokenTree { - TokenTree::Group(g) - } -@@ -508,42 +535,42 @@ impl From for TokenTree { - TokenTree::Literal(g) - } - } - - /// Prints the token tree as a string that is supposed to be losslessly - /// convertible back into the same token tree (modulo spans), except for - /// possibly `TokenTree::Group`s with `Delimiter::None` delimiters and negative - /// numeric literals. --impl fmt::Display for TokenTree { -+impl Display for TokenTree { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { -- match *self { -- TokenTree::Group(ref t) => t.fmt(f), -- TokenTree::Ident(ref t) => t.fmt(f), -- TokenTree::Punct(ref t) => t.fmt(f), -- TokenTree::Literal(ref t) => t.fmt(f), -+ match self { -+ TokenTree::Group(t) => Display::fmt(t, f), -+ TokenTree::Ident(t) => Display::fmt(t, f), -+ TokenTree::Punct(t) => Display::fmt(t, f), -+ TokenTree::Literal(t) => Display::fmt(t, f), - } - } - } - - /// Prints token tree in a form convenient for debugging. --impl fmt::Debug for TokenTree { -+impl Debug for TokenTree { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - // Each of these has the name in the struct type in the derived debug, - // so don't bother with an extra layer of indirection -- match *self { -- TokenTree::Group(ref t) => t.fmt(f), -- TokenTree::Ident(ref t) => { -+ match self { -+ TokenTree::Group(t) => Debug::fmt(t, f), -+ TokenTree::Ident(t) => { - let mut debug = f.debug_struct("Ident"); - debug.field("sym", &format_args!("{}", t)); - imp::debug_span_field_if_nontrivial(&mut debug, t.span().inner); - debug.finish() - } -- TokenTree::Punct(ref t) => t.fmt(f), -- TokenTree::Literal(ref t) => t.fmt(f), -+ TokenTree::Punct(t) => Debug::fmt(t, f), -+ TokenTree::Literal(t) => Debug::fmt(t, f), - } - } - } - - /// A delimited token stream. - /// - /// A `Group` internally contains a `TokenStream` which is surrounded by - /// `Delimiter`s. -@@ -646,25 +673,25 @@ impl Group { - pub fn set_span(&mut self, span: Span) { - self.inner.set_span(span.inner) - } - } - - /// Prints the group as a string that should be losslessly convertible back - /// into the same group (modulo spans), except for possibly `TokenTree::Group`s - /// with `Delimiter::None` delimiters. --impl fmt::Display for Group { -+impl Display for Group { - fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result { -- fmt::Display::fmt(&self.inner, formatter) -+ Display::fmt(&self.inner, formatter) - } - } - --impl fmt::Debug for Group { -+impl Debug for Group { - fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result { -- fmt::Debug::fmt(&self.inner, formatter) -+ Debug::fmt(&self.inner, formatter) - } - } - - /// An `Punct` is an single punctuation character like `+`, `-` or `#`. - /// - /// Multicharacter operators like `+=` are represented as two instances of - /// `Punct` with different forms of `Spacing` returned. - #[derive(Clone)] -@@ -725,23 +752,23 @@ impl Punct { - /// Configure the span for this punctuation character. - pub fn set_span(&mut self, span: Span) { - self.span = span; - } - } - - /// Prints the punctuation character as a string that should be losslessly - /// convertible back into the same character. --impl fmt::Display for Punct { -+impl Display for Punct { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { -- self.op.fmt(f) -+ Display::fmt(&self.op, f) - } - } - --impl fmt::Debug for Punct { -+impl Debug for Punct { - fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result { - let mut debug = fmt.debug_struct("Punct"); - debug.field("op", &self.op); - debug.field("spacing", &self.spacing); - imp::debug_span_field_if_nontrivial(&mut debug, self.span.inner); - debug.finish() - } - } -@@ -915,25 +942,25 @@ impl Ord for Ident { - impl Hash for Ident { - fn hash(&self, hasher: &mut H) { - self.to_string().hash(hasher) - } - } - - /// Prints the identifier as a string that should be losslessly convertible back - /// into the same identifier. --impl fmt::Display for Ident { -+impl Display for Ident { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { -- self.inner.fmt(f) -+ Display::fmt(&self.inner, f) - } - } - --impl fmt::Debug for Ident { -+impl Debug for Ident { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { -- self.inner.fmt(f) -+ Debug::fmt(&self.inner, f) - } - } - - /// A literal string (`"hello"`), byte string (`b"hello"`), character (`'a'`), - /// byte character (`b'a'`), an integer or floating point number with or without - /// a suffix (`1`, `1u8`, `2.3`, `2.3f32`). - /// - /// Boolean literals like `true` and `false` do not belong here, they are -@@ -1135,36 +1162,36 @@ impl Literal { - /// nightly compiler, this method will always return `None`. - /// - /// [`proc_macro::Literal::subspan`]: https://doc.rust-lang.org/proc_macro/struct.Literal.html#method.subspan - pub fn subspan>(&self, range: R) -> Option { - self.inner.subspan(range).map(Span::_new) - } - } - --impl fmt::Debug for Literal { -+impl Debug for Literal { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { -- self.inner.fmt(f) -+ Debug::fmt(&self.inner, f) - } - } - --impl fmt::Display for Literal { -+impl Display for Literal { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { -- self.inner.fmt(f) -+ Display::fmt(&self.inner, f) - } - } - - /// Public implementation details for the `TokenStream` type, such as iterators. - pub mod token_stream { -- use std::fmt; -+ use crate::{imp, TokenTree}; -+ use std::fmt::{self, Debug}; - use std::marker; - use std::rc::Rc; - - pub use crate::TokenStream; -- use crate::{imp, TokenTree}; - - /// An iterator over `TokenStream`'s `TokenTree`s. - /// - /// The iteration is "shallow", e.g. the iterator doesn't recurse into - /// delimited groups, and returns whole groups as token trees. - #[derive(Clone)] - pub struct IntoIter { - inner: imp::TokenTreeIter, -@@ -1174,19 +1201,19 @@ pub mod token_stream { - impl Iterator for IntoIter { - type Item = TokenTree; - - fn next(&mut self) -> Option { - self.inner.next() - } - } - -- impl fmt::Debug for IntoIter { -+ impl Debug for IntoIter { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { -- self.inner.fmt(f) -+ Debug::fmt(&self.inner, f) - } - } - - impl IntoIterator for TokenStream { - type Item = TokenTree; - type IntoIter = IntoIter; - - fn into_iter(self) -> IntoIter { -diff --git a/third_party/rust/proc-macro2/src/parse.rs b/third_party/rust/proc-macro2/src/parse.rs -new file mode 100644 ---- /dev/null -+++ b/third_party/rust/proc-macro2/src/parse.rs -@@ -0,0 +1,791 @@ -+use crate::fallback::{ -+ is_ident_continue, is_ident_start, Group, LexError, Literal, Span, TokenStream, -+}; -+use crate::{Delimiter, Punct, Spacing, TokenTree}; -+use std::str::{Bytes, CharIndices, Chars}; -+use unicode_xid::UnicodeXID; -+ -+#[derive(Copy, Clone, Eq, PartialEq)] -+pub(crate) struct Cursor<'a> { -+ pub rest: &'a str, -+ #[cfg(span_locations)] -+ pub off: u32, -+} -+ -+impl<'a> Cursor<'a> { -+ fn advance(&self, bytes: usize) -> Cursor<'a> { -+ let (_front, rest) = self.rest.split_at(bytes); -+ Cursor { -+ rest, -+ #[cfg(span_locations)] -+ off: self.off + _front.chars().count() as u32, -+ } -+ } -+ -+ fn starts_with(&self, s: &str) -> bool { -+ self.rest.starts_with(s) -+ } -+ -+ pub(crate) fn is_empty(&self) -> bool { -+ self.rest.is_empty() -+ } -+ -+ fn len(&self) -> usize { -+ self.rest.len() -+ } -+ -+ fn as_bytes(&self) -> &'a [u8] { -+ self.rest.as_bytes() -+ } -+ -+ fn bytes(&self) -> Bytes<'a> { -+ self.rest.bytes() -+ } -+ -+ fn chars(&self) -> Chars<'a> { -+ self.rest.chars() -+ } -+ -+ fn char_indices(&self) -> CharIndices<'a> { -+ self.rest.char_indices() -+ } -+ -+ fn parse(&self, tag: &str) -> Result, LexError> { -+ if self.starts_with(tag) { -+ Ok(self.advance(tag.len())) -+ } else { -+ Err(LexError) -+ } -+ } -+} -+ -+type PResult<'a, O> = Result<(Cursor<'a>, O), LexError>; -+ -+fn skip_whitespace(input: Cursor) -> Cursor { -+ let mut s = input; -+ -+ while !s.is_empty() { -+ let byte = s.as_bytes()[0]; -+ if byte == b'/' { -+ if s.starts_with("//") -+ && (!s.starts_with("///") || s.starts_with("////")) -+ && !s.starts_with("//!") -+ { -+ let (cursor, _) = take_until_newline_or_eof(s); -+ s = cursor; -+ continue; -+ } else if s.starts_with("/**/") { -+ s = s.advance(4); -+ continue; -+ } else if s.starts_with("/*") -+ && (!s.starts_with("/**") || s.starts_with("/***")) -+ && !s.starts_with("/*!") -+ { -+ match block_comment(s) { -+ Ok((rest, _)) => { -+ s = rest; -+ continue; -+ } -+ Err(LexError) => return s, -+ } -+ } -+ } -+ match byte { -+ b' ' | 0x09..=0x0d => { -+ s = s.advance(1); -+ continue; -+ } -+ b if b <= 0x7f => {} -+ _ => { -+ let ch = s.chars().next().unwrap(); -+ if is_whitespace(ch) { -+ s = s.advance(ch.len_utf8()); -+ continue; -+ } -+ } -+ } -+ return s; -+ } -+ s -+} -+ -+fn block_comment(input: Cursor) -> PResult<&str> { -+ if !input.starts_with("/*") { -+ return Err(LexError); -+ } -+ -+ let mut depth = 0; -+ let bytes = input.as_bytes(); -+ let mut i = 0; -+ let upper = bytes.len() - 1; -+ -+ while i < upper { -+ if bytes[i] == b'/' && bytes[i + 1] == b'*' { -+ depth += 1; -+ i += 1; // eat '*' -+ } else if bytes[i] == b'*' && bytes[i + 1] == b'/' { -+ depth -= 1; -+ if depth == 0 { -+ return Ok((input.advance(i + 2), &input.rest[..i + 2])); -+ } -+ i += 1; // eat '/' -+ } -+ i += 1; -+ } -+ -+ Err(LexError) -+} -+ -+fn is_whitespace(ch: char) -> bool { -+ // Rust treats left-to-right mark and right-to-left mark as whitespace -+ ch.is_whitespace() || ch == '\u{200e}' || ch == '\u{200f}' -+} -+ -+fn word_break(input: Cursor) -> Result { -+ match input.chars().next() { -+ Some(ch) if UnicodeXID::is_xid_continue(ch) => Err(LexError), -+ Some(_) | None => Ok(input), -+ } -+} -+ -+pub(crate) fn token_stream(mut input: Cursor) -> PResult { -+ let mut trees = Vec::new(); -+ let mut stack = Vec::new(); -+ -+ loop { -+ input = skip_whitespace(input); -+ -+ if let Ok((rest, tt)) = doc_comment(input) { -+ trees.extend(tt); -+ input = rest; -+ continue; -+ } -+ -+ #[cfg(span_locations)] -+ let lo = input.off; -+ -+ let first = match input.bytes().next() { -+ Some(first) => first, -+ None => break, -+ }; -+ -+ if let Some(open_delimiter) = match first { -+ b'(' => Some(Delimiter::Parenthesis), -+ b'[' => Some(Delimiter::Bracket), -+ b'{' => Some(Delimiter::Brace), -+ _ => None, -+ } { -+ input = input.advance(1); -+ let frame = (open_delimiter, trees); -+ #[cfg(span_locations)] -+ let frame = (lo, frame); -+ stack.push(frame); -+ trees = Vec::new(); -+ } else if let Some(close_delimiter) = match first { -+ b')' => Some(Delimiter::Parenthesis), -+ b']' => Some(Delimiter::Bracket), -+ b'}' => Some(Delimiter::Brace), -+ _ => None, -+ } { -+ input = input.advance(1); -+ let frame = stack.pop().ok_or(LexError)?; -+ #[cfg(span_locations)] -+ let (lo, frame) = frame; -+ let (open_delimiter, outer) = frame; -+ if open_delimiter != close_delimiter { -+ return Err(LexError); -+ } -+ let mut g = Group::new(open_delimiter, TokenStream { inner: trees }); -+ g.set_span(Span { -+ #[cfg(span_locations)] -+ lo, -+ #[cfg(span_locations)] -+ hi: input.off, -+ }); -+ trees = outer; -+ trees.push(TokenTree::Group(crate::Group::_new_stable(g))); -+ } else { -+ let (rest, mut tt) = leaf_token(input)?; -+ tt.set_span(crate::Span::_new_stable(Span { -+ #[cfg(span_locations)] -+ lo, -+ #[cfg(span_locations)] -+ hi: rest.off, -+ })); -+ trees.push(tt); -+ input = rest; -+ } -+ } -+ -+ if stack.is_empty() { -+ Ok((input, TokenStream { inner: trees })) -+ } else { -+ Err(LexError) -+ } -+} -+ -+fn leaf_token(input: Cursor) -> PResult { -+ if let Ok((input, l)) = literal(input) { -+ // must be parsed before ident -+ Ok((input, TokenTree::Literal(crate::Literal::_new_stable(l)))) -+ } else if let Ok((input, p)) = op(input) { -+ Ok((input, TokenTree::Punct(p))) -+ } else if let Ok((input, i)) = ident(input) { -+ Ok((input, TokenTree::Ident(i))) -+ } else { -+ Err(LexError) -+ } -+} -+ -+fn ident(input: Cursor) -> PResult { -+ let raw = input.starts_with("r#"); -+ let rest = input.advance((raw as usize) << 1); -+ -+ let (rest, sym) = ident_not_raw(rest)?; -+ -+ if !raw { -+ let ident = crate::Ident::new(sym, crate::Span::call_site()); -+ return Ok((rest, ident)); -+ } -+ -+ if sym == "_" { -+ return Err(LexError); -+ } -+ -+ let ident = crate::Ident::_new_raw(sym, crate::Span::call_site()); -+ Ok((rest, ident)) -+} -+ -+fn ident_not_raw(input: Cursor) -> PResult<&str> { -+ let mut chars = input.char_indices(); -+ -+ match chars.next() { -+ Some((_, ch)) if is_ident_start(ch) => {} -+ _ => return Err(LexError), -+ } -+ -+ let mut end = input.len(); -+ for (i, ch) in chars { -+ if !is_ident_continue(ch) { -+ end = i; -+ break; -+ } -+ } -+ -+ Ok((input.advance(end), &input.rest[..end])) -+} -+ -+fn literal(input: Cursor) -> PResult { -+ match literal_nocapture(input) { -+ Ok(a) => { -+ let end = input.len() - a.len(); -+ Ok((a, Literal::_new(input.rest[..end].to_string()))) -+ } -+ Err(LexError) => Err(LexError), -+ } -+} -+ -+fn literal_nocapture(input: Cursor) -> Result { -+ if let Ok(ok) = string(input) { -+ Ok(ok) -+ } else if let Ok(ok) = byte_string(input) { -+ Ok(ok) -+ } else if let Ok(ok) = byte(input) { -+ Ok(ok) -+ } else if let Ok(ok) = character(input) { -+ Ok(ok) -+ } else if let Ok(ok) = float(input) { -+ Ok(ok) -+ } else if let Ok(ok) = int(input) { -+ Ok(ok) -+ } else { -+ Err(LexError) -+ } -+} -+ -+fn literal_suffix(input: Cursor) -> Cursor { -+ match ident_not_raw(input) { -+ Ok((input, _)) => input, -+ Err(LexError) => input, -+ } -+} -+ -+fn string(input: Cursor) -> Result { -+ if let Ok(input) = input.parse("\"") { -+ cooked_string(input) -+ } else if let Ok(input) = input.parse("r") { -+ raw_string(input) -+ } else { -+ Err(LexError) -+ } -+} -+ -+fn cooked_string(input: Cursor) -> Result { -+ let mut chars = input.char_indices().peekable(); -+ -+ while let Some((i, ch)) = chars.next() { -+ match ch { -+ '"' => { -+ let input = input.advance(i + 1); -+ return Ok(literal_suffix(input)); -+ } -+ '\r' => { -+ if let Some((_, '\n')) = chars.next() { -+ // ... -+ } else { -+ break; -+ } -+ } -+ '\\' => match chars.next() { -+ Some((_, 'x')) => { -+ if !backslash_x_char(&mut chars) { -+ break; -+ } -+ } -+ Some((_, 'n')) | Some((_, 'r')) | Some((_, 't')) | Some((_, '\\')) -+ | Some((_, '\'')) | Some((_, '"')) | Some((_, '0')) => {} -+ Some((_, 'u')) => { -+ if !backslash_u(&mut chars) { -+ break; -+ } -+ } -+ Some((_, '\n')) | Some((_, '\r')) => { -+ while let Some(&(_, ch)) = chars.peek() { -+ if ch.is_whitespace() { -+ chars.next(); -+ } else { -+ break; -+ } -+ } -+ } -+ _ => break, -+ }, -+ _ch => {} -+ } -+ } -+ Err(LexError) -+} -+ -+fn byte_string(input: Cursor) -> Result { -+ if let Ok(input) = input.parse("b\"") { -+ cooked_byte_string(input) -+ } else if let Ok(input) = input.parse("br") { -+ raw_string(input) -+ } else { -+ Err(LexError) -+ } -+} -+ -+fn cooked_byte_string(mut input: Cursor) -> Result { -+ let mut bytes = input.bytes().enumerate(); -+ 'outer: while let Some((offset, b)) = bytes.next() { -+ match b { -+ b'"' => { -+ let input = input.advance(offset + 1); -+ return Ok(literal_suffix(input)); -+ } -+ b'\r' => { -+ if let Some((_, b'\n')) = bytes.next() { -+ // ... -+ } else { -+ break; -+ } -+ } -+ b'\\' => match bytes.next() { -+ Some((_, b'x')) => { -+ if !backslash_x_byte(&mut bytes) { -+ break; -+ } -+ } -+ Some((_, b'n')) | Some((_, b'r')) | Some((_, b't')) | Some((_, b'\\')) -+ | Some((_, b'0')) | Some((_, b'\'')) | Some((_, b'"')) => {} -+ Some((newline, b'\n')) | Some((newline, b'\r')) => { -+ let rest = input.advance(newline + 1); -+ for (offset, ch) in rest.char_indices() { -+ if !ch.is_whitespace() { -+ input = rest.advance(offset); -+ bytes = input.bytes().enumerate(); -+ continue 'outer; -+ } -+ } -+ break; -+ } -+ _ => break, -+ }, -+ b if b < 0x80 => {} -+ _ => break, -+ } -+ } -+ Err(LexError) -+} -+ -+fn raw_string(input: Cursor) -> Result { -+ let mut chars = input.char_indices(); -+ let mut n = 0; -+ while let Some((i, ch)) = chars.next() { -+ match ch { -+ '"' => { -+ n = i; -+ break; -+ } -+ '#' => {} -+ _ => return Err(LexError), -+ } -+ } -+ for (i, ch) in chars { -+ match ch { -+ '"' if input.rest[i + 1..].starts_with(&input.rest[..n]) => { -+ let rest = input.advance(i + 1 + n); -+ return Ok(literal_suffix(rest)); -+ } -+ '\r' => {} -+ _ => {} -+ } -+ } -+ Err(LexError) -+} -+ -+fn byte(input: Cursor) -> Result { -+ let input = input.parse("b'")?; -+ let mut bytes = input.bytes().enumerate(); -+ let ok = match bytes.next().map(|(_, b)| b) { -+ Some(b'\\') => match bytes.next().map(|(_, b)| b) { -+ Some(b'x') => backslash_x_byte(&mut bytes), -+ Some(b'n') | Some(b'r') | Some(b't') | Some(b'\\') | Some(b'0') | Some(b'\'') -+ | Some(b'"') => true, -+ _ => false, -+ }, -+ b => b.is_some(), -+ }; -+ if !ok { -+ return Err(LexError); -+ } -+ let (offset, _) = bytes.next().ok_or(LexError)?; -+ if !input.chars().as_str().is_char_boundary(offset) { -+ return Err(LexError); -+ } -+ let input = input.advance(offset).parse("'")?; -+ Ok(literal_suffix(input)) -+} -+ -+fn character(input: Cursor) -> Result { -+ let input = input.parse("'")?; -+ let mut chars = input.char_indices(); -+ let ok = match chars.next().map(|(_, ch)| ch) { -+ Some('\\') => match chars.next().map(|(_, ch)| ch) { -+ Some('x') => backslash_x_char(&mut chars), -+ Some('u') => backslash_u(&mut chars), -+ Some('n') | Some('r') | Some('t') | Some('\\') | Some('0') | Some('\'') | Some('"') => { -+ true -+ } -+ _ => false, -+ }, -+ ch => ch.is_some(), -+ }; -+ if !ok { -+ return Err(LexError); -+ } -+ let (idx, _) = chars.next().ok_or(LexError)?; -+ let input = input.advance(idx).parse("'")?; -+ Ok(literal_suffix(input)) -+} -+ -+macro_rules! next_ch { -+ ($chars:ident @ $pat:pat $(| $rest:pat)*) => { -+ match $chars.next() { -+ Some((_, ch)) => match ch { -+ $pat $(| $rest)* => ch, -+ _ => return false, -+ }, -+ None => return false, -+ } -+ }; -+} -+ -+fn backslash_x_char(chars: &mut I) -> bool -+where -+ I: Iterator, -+{ -+ next_ch!(chars @ '0'..='7'); -+ next_ch!(chars @ '0'..='9' | 'a'..='f' | 'A'..='F'); -+ true -+} -+ -+fn backslash_x_byte(chars: &mut I) -> bool -+where -+ I: Iterator, -+{ -+ next_ch!(chars @ b'0'..=b'9' | b'a'..=b'f' | b'A'..=b'F'); -+ next_ch!(chars @ b'0'..=b'9' | b'a'..=b'f' | b'A'..=b'F'); -+ true -+} -+ -+fn backslash_u(chars: &mut I) -> bool -+where -+ I: Iterator, -+{ -+ next_ch!(chars @ '{'); -+ next_ch!(chars @ '0'..='9' | 'a'..='f' | 'A'..='F'); -+ loop { -+ let c = next_ch!(chars @ '0'..='9' | 'a'..='f' | 'A'..='F' | '_' | '}'); -+ if c == '}' { -+ return true; -+ } -+ } -+} -+ -+fn float(input: Cursor) -> Result { -+ let mut rest = float_digits(input)?; -+ if let Some(ch) = rest.chars().next() { -+ if is_ident_start(ch) { -+ rest = ident_not_raw(rest)?.0; -+ } -+ } -+ word_break(rest) -+} -+ -+fn float_digits(input: Cursor) -> Result { -+ let mut chars = input.chars().peekable(); -+ match chars.next() { -+ Some(ch) if ch >= '0' && ch <= '9' => {} -+ _ => return Err(LexError), -+ } -+ -+ let mut len = 1; -+ let mut has_dot = false; -+ let mut has_exp = false; -+ while let Some(&ch) = chars.peek() { -+ match ch { -+ '0'..='9' | '_' => { -+ chars.next(); -+ len += 1; -+ } -+ '.' => { -+ if has_dot { -+ break; -+ } -+ chars.next(); -+ if chars -+ .peek() -+ .map(|&ch| ch == '.' || is_ident_start(ch)) -+ .unwrap_or(false) -+ { -+ return Err(LexError); -+ } -+ len += 1; -+ has_dot = true; -+ } -+ 'e' | 'E' => { -+ chars.next(); -+ len += 1; -+ has_exp = true; -+ break; -+ } -+ _ => break, -+ } -+ } -+ -+ let rest = input.advance(len); -+ if !(has_dot || has_exp || rest.starts_with("f32") || rest.starts_with("f64")) { -+ return Err(LexError); -+ } -+ -+ if has_exp { -+ let mut has_exp_value = false; -+ while let Some(&ch) = chars.peek() { -+ match ch { -+ '+' | '-' => { -+ if has_exp_value { -+ break; -+ } -+ chars.next(); -+ len += 1; -+ } -+ '0'..='9' => { -+ chars.next(); -+ len += 1; -+ has_exp_value = true; -+ } -+ '_' => { -+ chars.next(); -+ len += 1; -+ } -+ _ => break, -+ } -+ } -+ if !has_exp_value { -+ return Err(LexError); -+ } -+ } -+ -+ Ok(input.advance(len)) -+} -+ -+fn int(input: Cursor) -> Result { -+ let mut rest = digits(input)?; -+ if let Some(ch) = rest.chars().next() { -+ if is_ident_start(ch) { -+ rest = ident_not_raw(rest)?.0; -+ } -+ } -+ word_break(rest) -+} -+ -+fn digits(mut input: Cursor) -> Result { -+ let base = if input.starts_with("0x") { -+ input = input.advance(2); -+ 16 -+ } else if input.starts_with("0o") { -+ input = input.advance(2); -+ 8 -+ } else if input.starts_with("0b") { -+ input = input.advance(2); -+ 2 -+ } else { -+ 10 -+ }; -+ -+ let mut len = 0; -+ let mut empty = true; -+ for b in input.bytes() { -+ let digit = match b { -+ b'0'..=b'9' => (b - b'0') as u64, -+ b'a'..=b'f' => 10 + (b - b'a') as u64, -+ b'A'..=b'F' => 10 + (b - b'A') as u64, -+ b'_' => { -+ if empty && base == 10 { -+ return Err(LexError); -+ } -+ len += 1; -+ continue; -+ } -+ _ => break, -+ }; -+ if digit >= base { -+ return Err(LexError); -+ } -+ len += 1; -+ empty = false; -+ } -+ if empty { -+ Err(LexError) -+ } else { -+ Ok(input.advance(len)) -+ } -+} -+ -+fn op(input: Cursor) -> PResult { -+ match op_char(input) { -+ Ok((rest, '\'')) => { -+ ident(rest)?; -+ Ok((rest, Punct::new('\'', Spacing::Joint))) -+ } -+ Ok((rest, ch)) => { -+ let kind = match op_char(rest) { -+ Ok(_) => Spacing::Joint, -+ Err(LexError) => Spacing::Alone, -+ }; -+ Ok((rest, Punct::new(ch, kind))) -+ } -+ Err(LexError) => Err(LexError), -+ } -+} -+ -+fn op_char(input: Cursor) -> PResult { -+ if input.starts_with("//") || input.starts_with("/*") { -+ // Do not accept `/` of a comment as an op. -+ return Err(LexError); -+ } -+ -+ let mut chars = input.chars(); -+ let first = match chars.next() { -+ Some(ch) => ch, -+ None => { -+ return Err(LexError); -+ } -+ }; -+ let recognized = "~!@#$%^&*-=+|;:,<.>/?'"; -+ if recognized.contains(first) { -+ Ok((input.advance(first.len_utf8()), first)) -+ } else { -+ Err(LexError) -+ } -+} -+ -+fn doc_comment(input: Cursor) -> PResult> { -+ #[cfg(span_locations)] -+ let lo = input.off; -+ let (rest, (comment, inner)) = doc_comment_contents(input)?; -+ let span = crate::Span::_new_stable(Span { -+ #[cfg(span_locations)] -+ lo, -+ #[cfg(span_locations)] -+ hi: rest.off, -+ }); -+ -+ let mut scan_for_bare_cr = comment; -+ while let Some(cr) = scan_for_bare_cr.find('\r') { -+ let rest = &scan_for_bare_cr[cr + 1..]; -+ if !rest.starts_with('\n') { -+ return Err(LexError); -+ } -+ scan_for_bare_cr = rest; -+ } -+ -+ let mut trees = Vec::new(); -+ trees.push(TokenTree::Punct(Punct::new('#', Spacing::Alone))); -+ if inner { -+ trees.push(Punct::new('!', Spacing::Alone).into()); -+ } -+ let mut stream = vec![ -+ TokenTree::Ident(crate::Ident::new("doc", span)), -+ TokenTree::Punct(Punct::new('=', Spacing::Alone)), -+ TokenTree::Literal(crate::Literal::string(comment)), -+ ]; -+ for tt in stream.iter_mut() { -+ tt.set_span(span); -+ } -+ let group = Group::new(Delimiter::Bracket, stream.into_iter().collect()); -+ trees.push(crate::Group::_new_stable(group).into()); -+ for tt in trees.iter_mut() { -+ tt.set_span(span); -+ } -+ Ok((rest, trees)) -+} -+ -+fn doc_comment_contents(input: Cursor) -> PResult<(&str, bool)> { -+ if input.starts_with("//!") { -+ let input = input.advance(3); -+ let (input, s) = take_until_newline_or_eof(input); -+ Ok((input, (s, true))) -+ } else if input.starts_with("/*!") { -+ let (input, s) = block_comment(input)?; -+ Ok((input, (&s[3..s.len() - 2], true))) -+ } else if input.starts_with("///") { -+ let input = input.advance(3); -+ if input.starts_with("/") { -+ return Err(LexError); -+ } -+ let (input, s) = take_until_newline_or_eof(input); -+ Ok((input, (s, false))) -+ } else if input.starts_with("/**") && !input.rest[3..].starts_with('*') { -+ let (input, s) = block_comment(input)?; -+ Ok((input, (&s[3..s.len() - 2], false))) -+ } else { -+ Err(LexError) -+ } -+} -+ -+fn take_until_newline_or_eof(input: Cursor) -> (Cursor, &str) { -+ let chars = input.char_indices(); -+ -+ for (i, ch) in chars { -+ if ch == '\n' { -+ return (input.advance(i), &input.rest[..i]); -+ } else if ch == '\r' && input.rest[i + 1..].starts_with('\n') { -+ return (input.advance(i + 1), &input.rest[..i]); -+ } -+ } -+ -+ (input.advance(input.len()), input.rest) -+} -diff --git a/third_party/rust/proc-macro2/src/strnom.rs b/third_party/rust/proc-macro2/src/strnom.rs -deleted file mode 100644 ---- a/third_party/rust/proc-macro2/src/strnom.rs -+++ /dev/null -@@ -1,391 +0,0 @@ --//! Adapted from [`nom`](https://github.com/Geal/nom). -- --use crate::fallback::LexError; --use std::str::{Bytes, CharIndices, Chars}; --use unicode_xid::UnicodeXID; -- --#[derive(Copy, Clone, Eq, PartialEq)] --pub struct Cursor<'a> { -- pub rest: &'a str, -- #[cfg(span_locations)] -- pub off: u32, --} -- --impl<'a> Cursor<'a> { -- #[cfg(not(span_locations))] -- pub fn advance(&self, amt: usize) -> Cursor<'a> { -- Cursor { -- rest: &self.rest[amt..], -- } -- } -- #[cfg(span_locations)] -- pub fn advance(&self, amt: usize) -> Cursor<'a> { -- Cursor { -- rest: &self.rest[amt..], -- off: self.off + (amt as u32), -- } -- } -- -- pub fn find(&self, p: char) -> Option { -- self.rest.find(p) -- } -- -- pub fn starts_with(&self, s: &str) -> bool { -- self.rest.starts_with(s) -- } -- -- pub fn is_empty(&self) -> bool { -- self.rest.is_empty() -- } -- -- pub fn len(&self) -> usize { -- self.rest.len() -- } -- -- pub fn as_bytes(&self) -> &'a [u8] { -- self.rest.as_bytes() -- } -- -- pub fn bytes(&self) -> Bytes<'a> { -- self.rest.bytes() -- } -- -- pub fn chars(&self) -> Chars<'a> { -- self.rest.chars() -- } -- -- pub fn char_indices(&self) -> CharIndices<'a> { -- self.rest.char_indices() -- } --} -- --pub type PResult<'a, O> = Result<(Cursor<'a>, O), LexError>; -- --pub fn whitespace(input: Cursor) -> PResult<()> { -- if input.is_empty() { -- return Err(LexError); -- } -- -- let bytes = input.as_bytes(); -- let mut i = 0; -- while i < bytes.len() { -- let s = input.advance(i); -- if bytes[i] == b'/' { -- if s.starts_with("//") -- && (!s.starts_with("///") || s.starts_with("////")) -- && !s.starts_with("//!") -- { -- if let Some(len) = s.find('\n') { -- i += len + 1; -- continue; -- } -- break; -- } else if s.starts_with("/**/") { -- i += 4; -- continue; -- } else if s.starts_with("/*") -- && (!s.starts_with("/**") || s.starts_with("/***")) -- && !s.starts_with("/*!") -- { -- let (_, com) = block_comment(s)?; -- i += com.len(); -- continue; -- } -- } -- match bytes[i] { -- b' ' | 0x09..=0x0d => { -- i += 1; -- continue; -- } -- b if b <= 0x7f => {} -- _ => { -- let ch = s.chars().next().unwrap(); -- if is_whitespace(ch) { -- i += ch.len_utf8(); -- continue; -- } -- } -- } -- return if i > 0 { Ok((s, ())) } else { Err(LexError) }; -- } -- Ok((input.advance(input.len()), ())) --} -- --pub fn block_comment(input: Cursor) -> PResult<&str> { -- if !input.starts_with("/*") { -- return Err(LexError); -- } -- -- let mut depth = 0; -- let bytes = input.as_bytes(); -- let mut i = 0; -- let upper = bytes.len() - 1; -- while i < upper { -- if bytes[i] == b'/' && bytes[i + 1] == b'*' { -- depth += 1; -- i += 1; // eat '*' -- } else if bytes[i] == b'*' && bytes[i + 1] == b'/' { -- depth -= 1; -- if depth == 0 { -- return Ok((input.advance(i + 2), &input.rest[..i + 2])); -- } -- i += 1; // eat '/' -- } -- i += 1; -- } -- Err(LexError) --} -- --pub fn skip_whitespace(input: Cursor) -> Cursor { -- match whitespace(input) { -- Ok((rest, _)) => rest, -- Err(LexError) => input, -- } --} -- --fn is_whitespace(ch: char) -> bool { -- // Rust treats left-to-right mark and right-to-left mark as whitespace -- ch.is_whitespace() || ch == '\u{200e}' || ch == '\u{200f}' --} -- --pub fn word_break(input: Cursor) -> PResult<()> { -- match input.chars().next() { -- Some(ch) if UnicodeXID::is_xid_continue(ch) => Err(LexError), -- Some(_) | None => Ok((input, ())), -- } --} -- --macro_rules! named { -- ($name:ident -> $o:ty, $submac:ident!( $($args:tt)* )) => { -- fn $name<'a>(i: Cursor<'a>) -> $crate::strnom::PResult<'a, $o> { -- $submac!(i, $($args)*) -- } -- }; --} -- --macro_rules! alt { -- ($i:expr, $e:ident | $($rest:tt)*) => { -- alt!($i, call!($e) | $($rest)*) -- }; -- -- ($i:expr, $subrule:ident!( $($args:tt)*) | $($rest:tt)*) => { -- match $subrule!($i, $($args)*) { -- res @ Ok(_) => res, -- _ => alt!($i, $($rest)*) -- } -- }; -- -- ($i:expr, $subrule:ident!( $($args:tt)* ) => { $gen:expr } | $($rest:tt)+) => { -- match $subrule!($i, $($args)*) { -- Ok((i, o)) => Ok((i, $gen(o))), -- Err(LexError) => alt!($i, $($rest)*) -- } -- }; -- -- ($i:expr, $e:ident => { $gen:expr } | $($rest:tt)*) => { -- alt!($i, call!($e) => { $gen } | $($rest)*) -- }; -- -- ($i:expr, $e:ident => { $gen:expr }) => { -- alt!($i, call!($e) => { $gen }) -- }; -- -- ($i:expr, $subrule:ident!( $($args:tt)* ) => { $gen:expr }) => { -- match $subrule!($i, $($args)*) { -- Ok((i, o)) => Ok((i, $gen(o))), -- Err(LexError) => Err(LexError), -- } -- }; -- -- ($i:expr, $e:ident) => { -- alt!($i, call!($e)) -- }; -- -- ($i:expr, $subrule:ident!( $($args:tt)*)) => { -- $subrule!($i, $($args)*) -- }; --} -- --macro_rules! do_parse { -- ($i:expr, ( $($rest:expr),* )) => { -- Ok(($i, ( $($rest),* ))) -- }; -- -- ($i:expr, $e:ident >> $($rest:tt)*) => { -- do_parse!($i, call!($e) >> $($rest)*) -- }; -- -- ($i:expr, $submac:ident!( $($args:tt)* ) >> $($rest:tt)*) => { -- match $submac!($i, $($args)*) { -- Err(LexError) => Err(LexError), -- Ok((i, _)) => do_parse!(i, $($rest)*), -- } -- }; -- -- ($i:expr, $field:ident : $e:ident >> $($rest:tt)*) => { -- do_parse!($i, $field: call!($e) >> $($rest)*) -- }; -- -- ($i:expr, $field:ident : $submac:ident!( $($args:tt)* ) >> $($rest:tt)*) => { -- match $submac!($i, $($args)*) { -- Err(LexError) => Err(LexError), -- Ok((i, o)) => { -- let $field = o; -- do_parse!(i, $($rest)*) -- }, -- } -- }; --} -- --macro_rules! peek { -- ($i:expr, $submac:ident!( $($args:tt)* )) => { -- match $submac!($i, $($args)*) { -- Ok((_, o)) => Ok(($i, o)), -- Err(LexError) => Err(LexError), -- } -- }; --} -- --macro_rules! call { -- ($i:expr, $fun:expr $(, $args:expr)*) => { -- $fun($i $(, $args)*) -- }; --} -- --macro_rules! option { -- ($i:expr, $f:expr) => { -- match $f($i) { -- Ok((i, o)) => Ok((i, Some(o))), -- Err(LexError) => Ok(($i, None)), -- } -- }; --} -- --macro_rules! take_until_newline_or_eof { -- ($i:expr,) => {{ -- if $i.len() == 0 { -- Ok(($i, "")) -- } else { -- match $i.find('\n') { -- Some(i) => Ok(($i.advance(i), &$i.rest[..i])), -- None => Ok(($i.advance($i.len()), &$i.rest[..$i.len()])), -- } -- } -- }}; --} -- --macro_rules! tuple { -- ($i:expr, $($rest:tt)*) => { -- tuple_parser!($i, (), $($rest)*) -- }; --} -- --/// Do not use directly. Use `tuple!`. --macro_rules! tuple_parser { -- ($i:expr, ($($parsed:tt),*), $e:ident, $($rest:tt)*) => { -- tuple_parser!($i, ($($parsed),*), call!($e), $($rest)*) -- }; -- -- ($i:expr, (), $submac:ident!( $($args:tt)* ), $($rest:tt)*) => { -- match $submac!($i, $($args)*) { -- Err(LexError) => Err(LexError), -- Ok((i, o)) => tuple_parser!(i, (o), $($rest)*), -- } -- }; -- -- ($i:expr, ($($parsed:tt)*), $submac:ident!( $($args:tt)* ), $($rest:tt)*) => { -- match $submac!($i, $($args)*) { -- Err(LexError) => Err(LexError), -- Ok((i, o)) => tuple_parser!(i, ($($parsed)* , o), $($rest)*), -- } -- }; -- -- ($i:expr, ($($parsed:tt),*), $e:ident) => { -- tuple_parser!($i, ($($parsed),*), call!($e)) -- }; -- -- ($i:expr, (), $submac:ident!( $($args:tt)* )) => { -- $submac!($i, $($args)*) -- }; -- -- ($i:expr, ($($parsed:expr),*), $submac:ident!( $($args:tt)* )) => { -- match $submac!($i, $($args)*) { -- Err(LexError) => Err(LexError), -- Ok((i, o)) => Ok((i, ($($parsed),*, o))) -- } -- }; -- -- ($i:expr, ($($parsed:expr),*)) => { -- Ok(($i, ($($parsed),*))) -- }; --} -- --macro_rules! not { -- ($i:expr, $submac:ident!( $($args:tt)* )) => { -- match $submac!($i, $($args)*) { -- Ok((_, _)) => Err(LexError), -- Err(LexError) => Ok(($i, ())), -- } -- }; --} -- --macro_rules! tag { -- ($i:expr, $tag:expr) => { -- if $i.starts_with($tag) { -- Ok(($i.advance($tag.len()), &$i.rest[..$tag.len()])) -- } else { -- Err(LexError) -- } -- }; --} -- --macro_rules! punct { -- ($i:expr, $punct:expr) => { -- $crate::strnom::punct($i, $punct) -- }; --} -- --/// Do not use directly. Use `punct!`. --pub fn punct<'a>(input: Cursor<'a>, token: &'static str) -> PResult<'a, &'a str> { -- let input = skip_whitespace(input); -- if input.starts_with(token) { -- Ok((input.advance(token.len()), token)) -- } else { -- Err(LexError) -- } --} -- --macro_rules! preceded { -- ($i:expr, $submac:ident!( $($args:tt)* ), $submac2:ident!( $($args2:tt)* )) => { -- match tuple!($i, $submac!($($args)*), $submac2!($($args2)*)) { -- Ok((remaining, (_, o))) => Ok((remaining, o)), -- Err(LexError) => Err(LexError), -- } -- }; -- -- ($i:expr, $submac:ident!( $($args:tt)* ), $g:expr) => { -- preceded!($i, $submac!($($args)*), call!($g)) -- }; --} -- --macro_rules! delimited { -- ($i:expr, $submac:ident!( $($args:tt)* ), $($rest:tt)+) => { -- match tuple_parser!($i, (), $submac!($($args)*), $($rest)*) { -- Err(LexError) => Err(LexError), -- Ok((i1, (_, o, _))) => Ok((i1, o)) -- } -- }; --} -- --macro_rules! map { -- ($i:expr, $submac:ident!( $($args:tt)* ), $g:expr) => { -- match $submac!($i, $($args)*) { -- Err(LexError) => Err(LexError), -- Ok((i, o)) => Ok((i, call!(o, $g))) -- } -- }; -- -- ($i:expr, $f:expr, $g:expr) => { -- map!($i, call!($f), $g) -- }; --} -diff --git a/third_party/rust/proc-macro2/src/wrapper.rs b/third_party/rust/proc-macro2/src/wrapper.rs ---- a/third_party/rust/proc-macro2/src/wrapper.rs -+++ b/third_party/rust/proc-macro2/src/wrapper.rs -@@ -1,96 +1,39 @@ --use std::fmt; --use std::iter; -+use crate::detection::inside_proc_macro; -+use crate::{fallback, Delimiter, Punct, Spacing, TokenTree}; -+use std::fmt::{self, Debug, Display}; -+use std::iter::FromIterator; - use std::ops::RangeBounds; --use std::panic::{self, PanicInfo}; -+use std::panic; - #[cfg(super_unstable)] - use std::path::PathBuf; - use std::str::FromStr; - --use crate::{fallback, Delimiter, Punct, Spacing, TokenTree}; -- - #[derive(Clone)] --pub enum TokenStream { -+pub(crate) enum TokenStream { - Compiler(DeferredTokenStream), - Fallback(fallback::TokenStream), - } - - // Work around https://github.com/rust-lang/rust/issues/65080. - // In `impl Extend for TokenStream` which is used heavily by quote, - // we hold on to the appended tokens and do proc_macro::TokenStream::extend as - // late as possible to batch together consecutive uses of the Extend impl. - #[derive(Clone)] --pub struct DeferredTokenStream { -+pub(crate) struct DeferredTokenStream { - stream: proc_macro::TokenStream, - extra: Vec, - } - --pub enum LexError { -+pub(crate) enum LexError { - Compiler(proc_macro::LexError), - Fallback(fallback::LexError), - } - --fn nightly_works() -> bool { -- use std::sync::atomic::*; -- use std::sync::Once; -- -- static WORKS: AtomicUsize = AtomicUsize::new(0); -- static INIT: Once = Once::new(); -- -- match WORKS.load(Ordering::SeqCst) { -- 1 => return false, -- 2 => return true, -- _ => {} -- } -- -- // Swap in a null panic hook to avoid printing "thread panicked" to stderr, -- // then use catch_unwind to determine whether the compiler's proc_macro is -- // working. When proc-macro2 is used from outside of a procedural macro all -- // of the proc_macro crate's APIs currently panic. -- // -- // The Once is to prevent the possibility of this ordering: -- // -- // thread 1 calls take_hook, gets the user's original hook -- // thread 1 calls set_hook with the null hook -- // thread 2 calls take_hook, thinks null hook is the original hook -- // thread 2 calls set_hook with the null hook -- // thread 1 calls set_hook with the actual original hook -- // thread 2 calls set_hook with what it thinks is the original hook -- // -- // in which the user's hook has been lost. -- // -- // There is still a race condition where a panic in a different thread can -- // happen during the interval that the user's original panic hook is -- // unregistered such that their hook is incorrectly not called. This is -- // sufficiently unlikely and less bad than printing panic messages to stderr -- // on correct use of this crate. Maybe there is a libstd feature request -- // here. For now, if a user needs to guarantee that this failure mode does -- // not occur, they need to call e.g. `proc_macro2::Span::call_site()` from -- // the main thread before launching any other threads. -- INIT.call_once(|| { -- type PanicHook = dyn Fn(&PanicInfo) + Sync + Send + 'static; -- -- let null_hook: Box = Box::new(|_panic_info| { /* ignore */ }); -- let sanity_check = &*null_hook as *const PanicHook; -- let original_hook = panic::take_hook(); -- panic::set_hook(null_hook); -- -- let works = panic::catch_unwind(|| proc_macro::Span::call_site()).is_ok(); -- WORKS.store(works as usize + 1, Ordering::SeqCst); -- -- let hopefully_null_hook = panic::take_hook(); -- panic::set_hook(original_hook); -- if sanity_check != &*hopefully_null_hook { -- panic!("observed race condition in proc_macro2::nightly_works"); -- } -- }); -- nightly_works() --} -- - fn mismatch() -> ! { - panic!("stable/nightly mismatch") - } - - impl DeferredTokenStream { - fn new(stream: proc_macro::TokenStream) -> Self { - DeferredTokenStream { - stream, -@@ -98,28 +41,33 @@ impl DeferredTokenStream { - } - } - - fn is_empty(&self) -> bool { - self.stream.is_empty() && self.extra.is_empty() - } - - fn evaluate_now(&mut self) { -- self.stream.extend(self.extra.drain(..)); -+ // If-check provides a fast short circuit for the common case of `extra` -+ // being empty, which saves a round trip over the proc macro bridge. -+ // Improves macro expansion time in winrt by 6% in debug mode. -+ if !self.extra.is_empty() { -+ self.stream.extend(self.extra.drain(..)); -+ } - } - - fn into_token_stream(mut self) -> proc_macro::TokenStream { - self.evaluate_now(); - self.stream - } - } - - impl TokenStream { - pub fn new() -> TokenStream { -- if nightly_works() { -+ if inside_proc_macro() { - TokenStream::Compiler(DeferredTokenStream::new(proc_macro::TokenStream::new())) - } else { - TokenStream::Fallback(fallback::TokenStream::new()) - } - } - - pub fn is_empty(&self) -> bool { - match self { -@@ -142,31 +90,37 @@ impl TokenStream { - } - } - } - - impl FromStr for TokenStream { - type Err = LexError; - - fn from_str(src: &str) -> Result { -- if nightly_works() { -+ if inside_proc_macro() { - Ok(TokenStream::Compiler(DeferredTokenStream::new( -- src.parse()?, -+ proc_macro_parse(src)?, - ))) - } else { - Ok(TokenStream::Fallback(src.parse()?)) - } - } - } - --impl fmt::Display for TokenStream { -+// Work around https://github.com/rust-lang/rust/issues/58736. -+fn proc_macro_parse(src: &str) -> Result { -+ panic::catch_unwind(|| src.parse().map_err(LexError::Compiler)) -+ .unwrap_or(Err(LexError::Fallback(fallback::LexError))) -+} -+ -+impl Display for TokenStream { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - match self { -- TokenStream::Compiler(tts) => tts.clone().into_token_stream().fmt(f), -- TokenStream::Fallback(tts) => tts.fmt(f), -+ TokenStream::Compiler(tts) => Display::fmt(&tts.clone().into_token_stream(), f), -+ TokenStream::Fallback(tts) => Display::fmt(tts, f), - } - } - } - - impl From for TokenStream { - fn from(inner: proc_macro::TokenStream) -> TokenStream { - TokenStream::Compiler(DeferredTokenStream::new(inner)) - } -@@ -182,17 +136,17 @@ impl From for proc_macro::T - } - - impl From for TokenStream { - fn from(inner: fallback::TokenStream) -> TokenStream { - TokenStream::Fallback(inner) - } - } - --// Assumes nightly_works(). -+// Assumes inside_proc_macro(). - fn into_compiler_token(token: TokenTree) -> proc_macro::TokenTree { - match token { - TokenTree::Group(tt) => tt.inner.unwrap_nightly().into(), - TokenTree::Punct(tt) => { - let spacing = match tt.spacing() { - Spacing::Joint => proc_macro::Spacing::Joint, - Spacing::Alone => proc_macro::Spacing::Alone, - }; -@@ -202,37 +156,37 @@ fn into_compiler_token(token: TokenTree) - } - TokenTree::Ident(tt) => tt.inner.unwrap_nightly().into(), - TokenTree::Literal(tt) => tt.inner.unwrap_nightly().into(), - } - } - - impl From for TokenStream { - fn from(token: TokenTree) -> TokenStream { -- if nightly_works() { -+ if inside_proc_macro() { - TokenStream::Compiler(DeferredTokenStream::new(into_compiler_token(token).into())) - } else { - TokenStream::Fallback(token.into()) - } - } - } - --impl iter::FromIterator for TokenStream { -+impl FromIterator for TokenStream { - fn from_iter>(trees: I) -> Self { -- if nightly_works() { -+ if inside_proc_macro() { - TokenStream::Compiler(DeferredTokenStream::new( - trees.into_iter().map(into_compiler_token).collect(), - )) - } else { - TokenStream::Fallback(trees.into_iter().collect()) - } - } - } - --impl iter::FromIterator for TokenStream { -+impl FromIterator for TokenStream { - fn from_iter>(streams: I) -> Self { - let mut streams = streams.into_iter(); - match streams.next() { - Some(TokenStream::Compiler(mut first)) => { - first.evaluate_now(); - first.stream.extend(streams.map(|s| match s { - TokenStream::Compiler(s) => s.into_token_stream(), - TokenStream::Fallback(_) => mismatch(), -@@ -247,75 +201,76 @@ impl iter::FromIterator for - TokenStream::Fallback(first) - } - None => TokenStream::new(), - } - } - } - - impl Extend for TokenStream { -- fn extend>(&mut self, streams: I) { -+ fn extend>(&mut self, stream: I) { - match self { - TokenStream::Compiler(tts) => { - // Here is the reason for DeferredTokenStream. -- tts.extra -- .extend(streams.into_iter().map(into_compiler_token)); -+ for token in stream { -+ tts.extra.push(into_compiler_token(token)); -+ } - } -- TokenStream::Fallback(tts) => tts.extend(streams), -+ TokenStream::Fallback(tts) => tts.extend(stream), - } - } - } - - impl Extend for TokenStream { - fn extend>(&mut self, streams: I) { - match self { - TokenStream::Compiler(tts) => { - tts.evaluate_now(); - tts.stream -- .extend(streams.into_iter().map(|stream| stream.unwrap_nightly())); -+ .extend(streams.into_iter().map(TokenStream::unwrap_nightly)); - } - TokenStream::Fallback(tts) => { -- tts.extend(streams.into_iter().map(|stream| stream.unwrap_stable())); -+ tts.extend(streams.into_iter().map(TokenStream::unwrap_stable)); - } - } - } - } - --impl fmt::Debug for TokenStream { -+impl Debug for TokenStream { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - match self { -- TokenStream::Compiler(tts) => tts.clone().into_token_stream().fmt(f), -- TokenStream::Fallback(tts) => tts.fmt(f), -+ TokenStream::Compiler(tts) => Debug::fmt(&tts.clone().into_token_stream(), f), -+ TokenStream::Fallback(tts) => Debug::fmt(tts, f), - } - } - } - - impl From for LexError { - fn from(e: proc_macro::LexError) -> LexError { - LexError::Compiler(e) - } - } - - impl From for LexError { - fn from(e: fallback::LexError) -> LexError { - LexError::Fallback(e) - } - } - --impl fmt::Debug for LexError { -+impl Debug for LexError { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - match self { -- LexError::Compiler(e) => e.fmt(f), -- LexError::Fallback(e) => e.fmt(f), -+ LexError::Compiler(e) => Debug::fmt(e, f), -+ LexError::Fallback(e) => Debug::fmt(e, f), - } - } - } - - #[derive(Clone)] --pub enum TokenTreeIter { -+pub(crate) enum TokenTreeIter { - Compiler(proc_macro::token_stream::IntoIter), - Fallback(fallback::TokenTreeIter), - } - - impl IntoIterator for TokenStream { - type Item = TokenTree; - type IntoIter = TokenTreeIter; - -@@ -356,25 +311,25 @@ impl Iterator for TokenTreeIter { - fn size_hint(&self) -> (usize, Option) { - match self { - TokenTreeIter::Compiler(tts) => tts.size_hint(), - TokenTreeIter::Fallback(tts) => tts.size_hint(), - } - } - } - --impl fmt::Debug for TokenTreeIter { -+impl Debug for TokenTreeIter { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - f.debug_struct("TokenTreeIter").finish() - } - } - - #[derive(Clone, PartialEq, Eq)] - #[cfg(super_unstable)] --pub enum SourceFile { -+pub(crate) enum SourceFile { - Compiler(proc_macro::SourceFile), - Fallback(fallback::SourceFile), - } - - #[cfg(super_unstable)] - impl SourceFile { - fn nightly(sf: proc_macro::SourceFile) -> Self { - SourceFile::Compiler(sf) -@@ -392,68 +347,87 @@ impl SourceFile { - match self { - SourceFile::Compiler(a) => a.is_real(), - SourceFile::Fallback(a) => a.is_real(), - } - } - } - - #[cfg(super_unstable)] --impl fmt::Debug for SourceFile { -+impl Debug for SourceFile { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - match self { -- SourceFile::Compiler(a) => a.fmt(f), -- SourceFile::Fallback(a) => a.fmt(f), -+ SourceFile::Compiler(a) => Debug::fmt(a, f), -+ SourceFile::Fallback(a) => Debug::fmt(a, f), - } - } - } - - #[cfg(any(super_unstable, feature = "span-locations"))] --pub struct LineColumn { -+pub(crate) struct LineColumn { - pub line: usize, - pub column: usize, - } - - #[derive(Copy, Clone)] --pub enum Span { -+pub(crate) enum Span { - Compiler(proc_macro::Span), - Fallback(fallback::Span), - } - - impl Span { - pub fn call_site() -> Span { -- if nightly_works() { -+ if inside_proc_macro() { - Span::Compiler(proc_macro::Span::call_site()) - } else { - Span::Fallback(fallback::Span::call_site()) - } - } - -+ #[cfg(hygiene)] -+ pub fn mixed_site() -> Span { -+ if inside_proc_macro() { -+ Span::Compiler(proc_macro::Span::mixed_site()) -+ } else { -+ Span::Fallback(fallback::Span::mixed_site()) -+ } -+ } -+ - #[cfg(super_unstable)] - pub fn def_site() -> Span { -- if nightly_works() { -+ if inside_proc_macro() { - Span::Compiler(proc_macro::Span::def_site()) - } else { - Span::Fallback(fallback::Span::def_site()) - } - } - -- #[cfg(super_unstable)] - pub fn resolved_at(&self, other: Span) -> Span { - match (self, other) { -+ #[cfg(hygiene)] - (Span::Compiler(a), Span::Compiler(b)) => Span::Compiler(a.resolved_at(b)), -+ -+ // Name resolution affects semantics, but location is only cosmetic -+ #[cfg(not(hygiene))] -+ (Span::Compiler(_), Span::Compiler(_)) => other, -+ - (Span::Fallback(a), Span::Fallback(b)) => Span::Fallback(a.resolved_at(b)), - _ => mismatch(), - } - } - -- #[cfg(super_unstable)] - pub fn located_at(&self, other: Span) -> Span { - match (self, other) { -+ #[cfg(hygiene)] - (Span::Compiler(a), Span::Compiler(b)) => Span::Compiler(a.located_at(b)), -+ -+ // Name resolution affects semantics, but location is only cosmetic -+ #[cfg(not(hygiene))] -+ (Span::Compiler(_), Span::Compiler(_)) => *self, -+ - (Span::Fallback(a), Span::Fallback(b)) => Span::Fallback(a.located_at(b)), - _ => mismatch(), - } - } - - pub fn unwrap(self) -> proc_macro::Span { - match self { - Span::Compiler(s) => s, -@@ -537,36 +511,36 @@ impl From for crate::S - } - - impl From for Span { - fn from(inner: fallback::Span) -> Span { - Span::Fallback(inner) - } - } - --impl fmt::Debug for Span { -+impl Debug for Span { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - match self { -- Span::Compiler(s) => s.fmt(f), -- Span::Fallback(s) => s.fmt(f), -+ Span::Compiler(s) => Debug::fmt(s, f), -+ Span::Fallback(s) => Debug::fmt(s, f), - } - } - } - --pub fn debug_span_field_if_nontrivial(debug: &mut fmt::DebugStruct, span: Span) { -+pub(crate) fn debug_span_field_if_nontrivial(debug: &mut fmt::DebugStruct, span: Span) { - match span { - Span::Compiler(s) => { - debug.field("span", &s); - } - Span::Fallback(s) => fallback::debug_span_field_if_nontrivial(debug, s), - } - } - - #[derive(Clone)] --pub enum Group { -+pub(crate) enum Group { - Compiler(proc_macro::Group), - Fallback(fallback::Group), - } - - impl Group { - pub fn new(delimiter: Delimiter, stream: TokenStream) -> Group { - match stream { - TokenStream::Compiler(tts) => { -@@ -647,36 +621,36 @@ impl Group { - } - - impl From for Group { - fn from(g: fallback::Group) -> Self { - Group::Fallback(g) - } - } - --impl fmt::Display for Group { -+impl Display for Group { - fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result { - match self { -- Group::Compiler(group) => group.fmt(formatter), -- Group::Fallback(group) => group.fmt(formatter), -+ Group::Compiler(group) => Display::fmt(group, formatter), -+ Group::Fallback(group) => Display::fmt(group, formatter), - } - } - } - --impl fmt::Debug for Group { -+impl Debug for Group { - fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result { - match self { -- Group::Compiler(group) => group.fmt(formatter), -- Group::Fallback(group) => group.fmt(formatter), -+ Group::Compiler(group) => Debug::fmt(group, formatter), -+ Group::Fallback(group) => Debug::fmt(group, formatter), - } - } - } - - #[derive(Clone)] --pub enum Ident { -+pub(crate) enum Ident { - Compiler(proc_macro::Ident), - Fallback(fallback::Ident), - } - - impl Ident { - pub fn new(string: &str, span: Span) -> Ident { - match span { - Span::Compiler(s) => Ident::Compiler(proc_macro::Ident::new(string, s)), -@@ -742,56 +716,56 @@ where - let other = other.as_ref(); - match self { - Ident::Compiler(t) => t.to_string() == other, - Ident::Fallback(t) => t == other, - } - } - } - --impl fmt::Display for Ident { -+impl Display for Ident { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - match self { -- Ident::Compiler(t) => t.fmt(f), -- Ident::Fallback(t) => t.fmt(f), -+ Ident::Compiler(t) => Display::fmt(t, f), -+ Ident::Fallback(t) => Display::fmt(t, f), - } - } - } - --impl fmt::Debug for Ident { -+impl Debug for Ident { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - match self { -- Ident::Compiler(t) => t.fmt(f), -- Ident::Fallback(t) => t.fmt(f), -+ Ident::Compiler(t) => Debug::fmt(t, f), -+ Ident::Fallback(t) => Debug::fmt(t, f), - } - } - } - - #[derive(Clone)] --pub enum Literal { -+pub(crate) enum Literal { - Compiler(proc_macro::Literal), - Fallback(fallback::Literal), - } - - macro_rules! suffixed_numbers { - ($($name:ident => $kind:ident,)*) => ($( - pub fn $name(n: $kind) -> Literal { -- if nightly_works() { -+ if inside_proc_macro() { - Literal::Compiler(proc_macro::Literal::$name(n)) - } else { - Literal::Fallback(fallback::Literal::$name(n)) - } - } - )*) - } - - macro_rules! unsuffixed_integers { - ($($name:ident => $kind:ident,)*) => ($( - pub fn $name(n: $kind) -> Literal { -- if nightly_works() { -+ if inside_proc_macro() { - Literal::Compiler(proc_macro::Literal::$name(n)) - } else { - Literal::Fallback(fallback::Literal::$name(n)) - } - } - )*) - } - -@@ -825,49 +799,49 @@ impl Literal { - i16_unsuffixed => i16, - i32_unsuffixed => i32, - i64_unsuffixed => i64, - i128_unsuffixed => i128, - isize_unsuffixed => isize, - } - - pub fn f32_unsuffixed(f: f32) -> Literal { -- if nightly_works() { -+ if inside_proc_macro() { - Literal::Compiler(proc_macro::Literal::f32_unsuffixed(f)) - } else { - Literal::Fallback(fallback::Literal::f32_unsuffixed(f)) - } - } - - pub fn f64_unsuffixed(f: f64) -> Literal { -- if nightly_works() { -+ if inside_proc_macro() { - Literal::Compiler(proc_macro::Literal::f64_unsuffixed(f)) - } else { - Literal::Fallback(fallback::Literal::f64_unsuffixed(f)) - } - } - - pub fn string(t: &str) -> Literal { -- if nightly_works() { -+ if inside_proc_macro() { - Literal::Compiler(proc_macro::Literal::string(t)) - } else { - Literal::Fallback(fallback::Literal::string(t)) - } - } - - pub fn character(t: char) -> Literal { -- if nightly_works() { -+ if inside_proc_macro() { - Literal::Compiler(proc_macro::Literal::character(t)) - } else { - Literal::Fallback(fallback::Literal::character(t)) - } - } - - pub fn byte_string(bytes: &[u8]) -> Literal { -- if nightly_works() { -+ if inside_proc_macro() { - Literal::Compiler(proc_macro::Literal::byte_string(bytes)) - } else { - Literal::Fallback(fallback::Literal::byte_string(bytes)) - } - } - - pub fn span(&self) -> Span { - match self { -@@ -903,25 +877,25 @@ impl Literal { - } - - impl From for Literal { - fn from(s: fallback::Literal) -> Literal { - Literal::Fallback(s) - } - } - --impl fmt::Display for Literal { -+impl Display for Literal { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - match self { -- Literal::Compiler(t) => t.fmt(f), -- Literal::Fallback(t) => t.fmt(f), -+ Literal::Compiler(t) => Display::fmt(t, f), -+ Literal::Fallback(t) => Display::fmt(t, f), - } - } - } - --impl fmt::Debug for Literal { -+impl Debug for Literal { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - match self { -- Literal::Compiler(t) => t.fmt(f), -- Literal::Fallback(t) => t.fmt(f), -+ Literal::Compiler(t) => Debug::fmt(t, f), -+ Literal::Fallback(t) => Debug::fmt(t, f), - } - } - } -diff --git a/third_party/rust/proc-macro2/tests/comments.rs b/third_party/rust/proc-macro2/tests/comments.rs -new file mode 100644 ---- /dev/null -+++ b/third_party/rust/proc-macro2/tests/comments.rs -@@ -0,0 +1,103 @@ -+use proc_macro2::{Delimiter, Literal, Spacing, TokenStream, TokenTree}; -+ -+// #[doc = "..."] -> "..." -+fn lit_of_outer_doc_comment(tokens: TokenStream) -> Literal { -+ lit_of_doc_comment(tokens, false) -+} -+ -+// #![doc = "..."] -> "..." -+fn lit_of_inner_doc_comment(tokens: TokenStream) -> Literal { -+ lit_of_doc_comment(tokens, true) -+} -+ -+fn lit_of_doc_comment(tokens: TokenStream, inner: bool) -> Literal { -+ let mut iter = tokens.clone().into_iter(); -+ match iter.next().unwrap() { -+ TokenTree::Punct(punct) => { -+ assert_eq!(punct.as_char(), '#'); -+ assert_eq!(punct.spacing(), Spacing::Alone); -+ } -+ _ => panic!("wrong token {:?}", tokens), -+ } -+ if inner { -+ match iter.next().unwrap() { -+ TokenTree::Punct(punct) => { -+ assert_eq!(punct.as_char(), '!'); -+ assert_eq!(punct.spacing(), Spacing::Alone); -+ } -+ _ => panic!("wrong token {:?}", tokens), -+ } -+ } -+ iter = match iter.next().unwrap() { -+ TokenTree::Group(group) => { -+ assert_eq!(group.delimiter(), Delimiter::Bracket); -+ assert!(iter.next().is_none(), "unexpected token {:?}", tokens); -+ group.stream().into_iter() -+ } -+ _ => panic!("wrong token {:?}", tokens), -+ }; -+ match iter.next().unwrap() { -+ TokenTree::Ident(ident) => assert_eq!(ident.to_string(), "doc"), -+ _ => panic!("wrong token {:?}", tokens), -+ } -+ match iter.next().unwrap() { -+ TokenTree::Punct(punct) => { -+ assert_eq!(punct.as_char(), '='); -+ assert_eq!(punct.spacing(), Spacing::Alone); -+ } -+ _ => panic!("wrong token {:?}", tokens), -+ } -+ match iter.next().unwrap() { -+ TokenTree::Literal(literal) => { -+ assert!(iter.next().is_none(), "unexpected token {:?}", tokens); -+ literal -+ } -+ _ => panic!("wrong token {:?}", tokens), -+ } -+} -+ -+#[test] -+fn closed_immediately() { -+ let stream = "/**/".parse::().unwrap(); -+ let tokens = stream.into_iter().collect::>(); -+ assert!(tokens.is_empty(), "not empty -- {:?}", tokens); -+} -+ -+#[test] -+fn incomplete() { -+ assert!("/*/".parse::().is_err()); -+} -+ -+#[test] -+fn lit() { -+ let stream = "/// doc".parse::().unwrap(); -+ let lit = lit_of_outer_doc_comment(stream); -+ assert_eq!(lit.to_string(), "\" doc\""); -+ -+ let stream = "//! doc".parse::().unwrap(); -+ let lit = lit_of_inner_doc_comment(stream); -+ assert_eq!(lit.to_string(), "\" doc\""); -+ -+ let stream = "/** doc */".parse::().unwrap(); -+ let lit = lit_of_outer_doc_comment(stream); -+ assert_eq!(lit.to_string(), "\" doc \""); -+ -+ let stream = "/*! doc */".parse::().unwrap(); -+ let lit = lit_of_inner_doc_comment(stream); -+ assert_eq!(lit.to_string(), "\" doc \""); -+} -+ -+#[test] -+fn carriage_return() { -+ let stream = "///\r\n".parse::().unwrap(); -+ let lit = lit_of_outer_doc_comment(stream); -+ assert_eq!(lit.to_string(), "\"\""); -+ -+ let stream = "/**\r\n*/".parse::().unwrap(); -+ let lit = lit_of_outer_doc_comment(stream); -+ assert_eq!(lit.to_string(), "\"\\r\\n\""); -+ -+ "///\r".parse::().unwrap_err(); -+ "///\r \n".parse::().unwrap_err(); -+ "/**\r \n*/".parse::().unwrap_err(); -+} -diff --git a/third_party/rust/proc-macro2/tests/test.rs b/third_party/rust/proc-macro2/tests/test.rs ---- a/third_party/rust/proc-macro2/tests/test.rs -+++ b/third_party/rust/proc-macro2/tests/test.rs -@@ -1,12 +1,11 @@ -+use proc_macro2::{Ident, Literal, Spacing, Span, TokenStream, TokenTree}; - use std::str::{self, FromStr}; - --use proc_macro2::{Ident, Literal, Spacing, Span, TokenStream, TokenTree}; -- - #[test] - fn idents() { - assert_eq!( - Ident::new("String", Span::call_site()).to_string(), - "String" - ); - assert_eq!(Ident::new("fn", Span::call_site()).to_string(), "fn"); - assert_eq!(Ident::new("_", Span::call_site()).to_string(), "_"); -@@ -105,16 +104,43 @@ fn literal_suffix() { - assert_eq!(token_count("999u256"), 1); - assert_eq!(token_count("999r#u256"), 3); - assert_eq!(token_count("1."), 1); - assert_eq!(token_count("1.f32"), 3); - assert_eq!(token_count("1.0_0"), 1); - assert_eq!(token_count("1._0"), 3); - assert_eq!(token_count("1._m"), 3); - assert_eq!(token_count("\"\"s"), 1); -+ assert_eq!(token_count("r\"\"r"), 1); -+ assert_eq!(token_count("b\"\"b"), 1); -+ assert_eq!(token_count("br\"\"br"), 1); -+ assert_eq!(token_count("r#\"\"#r"), 1); -+ assert_eq!(token_count("'c'c"), 1); -+ assert_eq!(token_count("b'b'b"), 1); -+} -+ -+#[test] -+fn literal_iter_negative() { -+ let negative_literal = Literal::i32_suffixed(-3); -+ let tokens = TokenStream::from(TokenTree::Literal(negative_literal)); -+ let mut iter = tokens.into_iter(); -+ match iter.next().unwrap() { -+ TokenTree::Punct(punct) => { -+ assert_eq!(punct.as_char(), '-'); -+ assert_eq!(punct.spacing(), Spacing::Alone); -+ } -+ unexpected => panic!("unexpected token {:?}", unexpected), -+ } -+ match iter.next().unwrap() { -+ TokenTree::Literal(literal) => { -+ assert_eq!(literal.to_string(), "3i32"); -+ } -+ unexpected => panic!("unexpected token {:?}", unexpected), -+ } -+ assert!(iter.next().is_none()); - } - - #[test] - fn roundtrip() { - fn roundtrip(p: &str) { - println!("parse: {}", p); - let s = p.parse::().unwrap().to_string(); - println!("first: {}", s); -@@ -161,46 +187,16 @@ fn fail() { - fail("' static"); - fail("r#1"); - fail("r#_"); - } - - #[cfg(span_locations)] - #[test] - fn span_test() { -- use proc_macro2::TokenTree; -- -- fn check_spans(p: &str, mut lines: &[(usize, usize, usize, usize)]) { -- let ts = p.parse::().unwrap(); -- check_spans_internal(ts, &mut lines); -- } -- -- fn check_spans_internal(ts: TokenStream, lines: &mut &[(usize, usize, usize, usize)]) { -- for i in ts { -- if let Some((&(sline, scol, eline, ecol), rest)) = lines.split_first() { -- *lines = rest; -- -- let start = i.span().start(); -- assert_eq!(start.line, sline, "sline did not match for {}", i); -- assert_eq!(start.column, scol, "scol did not match for {}", i); -- -- let end = i.span().end(); -- assert_eq!(end.line, eline, "eline did not match for {}", i); -- assert_eq!(end.column, ecol, "ecol did not match for {}", i); -- -- match i { -- TokenTree::Group(ref g) => { -- check_spans_internal(g.stream().clone(), lines); -- } -- _ => {} -- } -- } -- } -- } -- - check_spans( - "\ - /// This is a document comment - testing 123 - { - testing 234 - }", - &[ -@@ -269,59 +265,17 @@ fn span_join() { - joined1.unwrap().source_file(), - source1[0].span().source_file() - ); - } - - #[test] - fn no_panic() { - let s = str::from_utf8(b"b\'\xc2\x86 \x00\x00\x00^\"").unwrap(); -- assert!(s.parse::().is_err()); --} -- --#[test] --fn tricky_doc_comment() { -- let stream = "/**/".parse::().unwrap(); -- let tokens = stream.into_iter().collect::>(); -- assert!(tokens.is_empty(), "not empty -- {:?}", tokens); -- -- let stream = "/// doc".parse::().unwrap(); -- let tokens = stream.into_iter().collect::>(); -- assert!(tokens.len() == 2, "not length 2 -- {:?}", tokens); -- match tokens[0] { -- proc_macro2::TokenTree::Punct(ref tt) => assert_eq!(tt.as_char(), '#'), -- _ => panic!("wrong token {:?}", tokens[0]), -- } -- let mut tokens = match tokens[1] { -- proc_macro2::TokenTree::Group(ref tt) => { -- assert_eq!(tt.delimiter(), proc_macro2::Delimiter::Bracket); -- tt.stream().into_iter() -- } -- _ => panic!("wrong token {:?}", tokens[0]), -- }; -- -- match tokens.next().unwrap() { -- proc_macro2::TokenTree::Ident(ref tt) => assert_eq!(tt.to_string(), "doc"), -- t => panic!("wrong token {:?}", t), -- } -- match tokens.next().unwrap() { -- proc_macro2::TokenTree::Punct(ref tt) => assert_eq!(tt.as_char(), '='), -- t => panic!("wrong token {:?}", t), -- } -- match tokens.next().unwrap() { -- proc_macro2::TokenTree::Literal(ref tt) => { -- assert_eq!(tt.to_string(), "\" doc\""); -- } -- t => panic!("wrong token {:?}", t), -- } -- assert!(tokens.next().is_none()); -- -- let stream = "//! doc".parse::().unwrap(); -- let tokens = stream.into_iter().collect::>(); -- assert!(tokens.len() == 3, "not length 3 -- {:?}", tokens); -+ assert!(s.parse::().is_err()); - } - - #[test] - fn op_before_comment() { - let mut tts = TokenStream::from_str("~// comment").unwrap().into_iter(); - match tts.next().unwrap() { - TokenTree::Punct(tt) => { - assert_eq!(tt.as_char(), '~'); -@@ -340,30 +294,30 @@ fn raw_identifier() { - } - assert!(tts.next().is_none()); - } - - #[test] - fn test_debug_ident() { - let ident = Ident::new("proc_macro", Span::call_site()); - -- #[cfg(not(procmacro2_semver_exempt))] -+ #[cfg(not(span_locations))] - let expected = "Ident(proc_macro)"; - -- #[cfg(procmacro2_semver_exempt)] -- let expected = "Ident { sym: proc_macro, span: bytes(0..0) }"; -+ #[cfg(span_locations)] -+ let expected = "Ident { sym: proc_macro }"; - - assert_eq!(expected, format!("{:?}", ident)); - } - - #[test] - fn test_debug_tokenstream() { - let tts = TokenStream::from_str("[a + 1]").unwrap(); - -- #[cfg(not(procmacro2_semver_exempt))] -+ #[cfg(not(span_locations))] - let expected = "\ - TokenStream [ - Group { - delimiter: Bracket, - stream: TokenStream [ - Ident { - sym: a, - }, -@@ -374,17 +328,17 @@ TokenStream [ - Literal { - lit: 1, - }, - ], - }, - ]\ - "; - -- #[cfg(not(procmacro2_semver_exempt))] -+ #[cfg(not(span_locations))] - let expected_before_trailing_commas = "\ - TokenStream [ - Group { - delimiter: Bracket, - stream: TokenStream [ - Ident { - sym: a - }, -@@ -395,17 +349,17 @@ TokenStream [ - Literal { - lit: 1 - } - ] - } - ]\ - "; - -- #[cfg(procmacro2_semver_exempt)] -+ #[cfg(span_locations)] - let expected = "\ - TokenStream [ - Group { - delimiter: Bracket, - stream: TokenStream [ - Ident { - sym: a, - span: bytes(2..3), -@@ -420,17 +374,17 @@ TokenStream [ - span: bytes(6..7), - }, - ], - span: bytes(1..8), - }, - ]\ - "; - -- #[cfg(procmacro2_semver_exempt)] -+ #[cfg(span_locations)] - let expected_before_trailing_commas = "\ - TokenStream [ - Group { - delimiter: Bracket, - stream: TokenStream [ - Ident { - sym: a, - span: bytes(2..3) -@@ -459,8 +413,85 @@ TokenStream [ - } - - #[test] - fn default_tokenstream_is_empty() { - let default_token_stream: TokenStream = Default::default(); - - assert!(default_token_stream.is_empty()); - } -+ -+#[test] -+fn tuple_indexing() { -+ // This behavior may change depending on https://github.com/rust-lang/rust/pull/71322 -+ let mut tokens = "tuple.0.0".parse::().unwrap().into_iter(); -+ assert_eq!("tuple", tokens.next().unwrap().to_string()); -+ assert_eq!(".", tokens.next().unwrap().to_string()); -+ assert_eq!("0.0", tokens.next().unwrap().to_string()); -+ assert!(tokens.next().is_none()); -+} -+ -+#[cfg(span_locations)] -+#[test] -+fn non_ascii_tokens() { -+ check_spans("// abc", &[]); -+ check_spans("// ábc", &[]); -+ check_spans("// abc x", &[]); -+ check_spans("// ábc x", &[]); -+ check_spans("/* abc */ x", &[(1, 10, 1, 11)]); -+ check_spans("/* ábc */ x", &[(1, 10, 1, 11)]); -+ check_spans("/* ab\nc */ x", &[(2, 5, 2, 6)]); -+ check_spans("/* áb\nc */ x", &[(2, 5, 2, 6)]); -+ check_spans("/*** abc */ x", &[(1, 12, 1, 13)]); -+ check_spans("/*** ábc */ x", &[(1, 12, 1, 13)]); -+ check_spans(r#""abc""#, &[(1, 0, 1, 5)]); -+ check_spans(r#""ábc""#, &[(1, 0, 1, 5)]); -+ check_spans(r###"r#"abc"#"###, &[(1, 0, 1, 8)]); -+ check_spans(r###"r#"ábc"#"###, &[(1, 0, 1, 8)]); -+ check_spans("r#\"a\nc\"#", &[(1, 0, 2, 3)]); -+ check_spans("r#\"á\nc\"#", &[(1, 0, 2, 3)]); -+ check_spans("'a'", &[(1, 0, 1, 3)]); -+ check_spans("'á'", &[(1, 0, 1, 3)]); -+ check_spans("//! abc", &[(1, 0, 1, 7), (1, 0, 1, 7), (1, 0, 1, 7)]); -+ check_spans("//! ábc", &[(1, 0, 1, 7), (1, 0, 1, 7), (1, 0, 1, 7)]); -+ check_spans("//! abc\n", &[(1, 0, 1, 7), (1, 0, 1, 7), (1, 0, 1, 7)]); -+ check_spans("//! ábc\n", &[(1, 0, 1, 7), (1, 0, 1, 7), (1, 0, 1, 7)]); -+ check_spans("/*! abc */", &[(1, 0, 1, 10), (1, 0, 1, 10), (1, 0, 1, 10)]); -+ check_spans("/*! ábc */", &[(1, 0, 1, 10), (1, 0, 1, 10), (1, 0, 1, 10)]); -+ check_spans("/*! a\nc */", &[(1, 0, 2, 4), (1, 0, 2, 4), (1, 0, 2, 4)]); -+ check_spans("/*! á\nc */", &[(1, 0, 2, 4), (1, 0, 2, 4), (1, 0, 2, 4)]); -+ check_spans("abc", &[(1, 0, 1, 3)]); -+ check_spans("ábc", &[(1, 0, 1, 3)]); -+ check_spans("ábć", &[(1, 0, 1, 3)]); -+ check_spans("abc// foo", &[(1, 0, 1, 3)]); -+ check_spans("ábc// foo", &[(1, 0, 1, 3)]); -+ check_spans("ábć// foo", &[(1, 0, 1, 3)]); -+ check_spans("b\"a\\\n c\"", &[(1, 0, 2, 3)]); -+ check_spans("b\"a\\\n\u{00a0}c\"", &[(1, 0, 2, 3)]); -+} -+ -+#[cfg(span_locations)] -+fn check_spans(p: &str, mut lines: &[(usize, usize, usize, usize)]) { -+ let ts = p.parse::().unwrap(); -+ check_spans_internal(ts, &mut lines); -+ assert!(lines.is_empty(), "leftover ranges: {:?}", lines); -+} -+ -+#[cfg(span_locations)] -+fn check_spans_internal(ts: TokenStream, lines: &mut &[(usize, usize, usize, usize)]) { -+ for i in ts { -+ if let Some((&(sline, scol, eline, ecol), rest)) = lines.split_first() { -+ *lines = rest; -+ -+ let start = i.span().start(); -+ assert_eq!(start.line, sline, "sline did not match for {}", i); -+ assert_eq!(start.column, scol, "scol did not match for {}", i); -+ -+ let end = i.span().end(); -+ assert_eq!(end.line, eline, "eline did not match for {}", i); -+ assert_eq!(end.column, ecol, "ecol did not match for {}", i); -+ -+ if let TokenTree::Group(g) = i { -+ check_spans_internal(g.stream().clone(), lines); -+ } -+ } -+ } -+} -diff --git a/third_party/rust/proc-macro2/tests/test_fmt.rs b/third_party/rust/proc-macro2/tests/test_fmt.rs -new file mode 100644 ---- /dev/null -+++ b/third_party/rust/proc-macro2/tests/test_fmt.rs -@@ -0,0 +1,26 @@ -+use proc_macro2::{Delimiter, Group, Ident, Span, TokenStream, TokenTree}; -+use std::iter::{self, FromIterator}; -+ -+#[test] -+fn test_fmt_group() { -+ let ident = Ident::new("x", Span::call_site()); -+ let inner = TokenStream::from_iter(iter::once(TokenTree::Ident(ident))); -+ let parens_empty = Group::new(Delimiter::Parenthesis, TokenStream::new()); -+ let parens_nonempty = Group::new(Delimiter::Parenthesis, inner.clone()); -+ let brackets_empty = Group::new(Delimiter::Bracket, TokenStream::new()); -+ let brackets_nonempty = Group::new(Delimiter::Bracket, inner.clone()); -+ let braces_empty = Group::new(Delimiter::Brace, TokenStream::new()); -+ let braces_nonempty = Group::new(Delimiter::Brace, inner.clone()); -+ let none_empty = Group::new(Delimiter::None, TokenStream::new()); -+ let none_nonempty = Group::new(Delimiter::None, inner.clone()); -+ -+ // Matches libproc_macro. -+ assert_eq!("()", parens_empty.to_string()); -+ assert_eq!("(x)", parens_nonempty.to_string()); -+ assert_eq!("[]", brackets_empty.to_string()); -+ assert_eq!("[x]", brackets_nonempty.to_string()); -+ assert_eq!("{ }", braces_empty.to_string()); -+ assert_eq!("{ x }", braces_nonempty.to_string()); -+ assert_eq!("", none_empty.to_string()); -+ assert_eq!("x", none_nonempty.to_string()); -+} -diff --git a/third_party/rust/syn/.cargo-checksum.json b/third_party/rust/syn/.cargo-checksum.json ---- a/third_party/rust/syn/.cargo-checksum.json -+++ b/third_party/rust/syn/.cargo-checksum.json -@@ -1,1 +1,1 @@ 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-\ No newline at end of file -diff --git a/third_party/rust/syn/Cargo.toml b/third_party/rust/syn/Cargo.toml ---- a/third_party/rust/syn/Cargo.toml -+++ b/third_party/rust/syn/Cargo.toml -@@ -8,79 +8,90 @@ - # If you believe there's an error in this file please file an - # issue against the rust-lang/cargo repository. If you're - # editing this file be aware that the upstream Cargo.toml - # will likely look very different (and much more reasonable) - - [package] - edition = "2018" - name = "syn" --version = "1.0.5" -+version = "1.0.40" - authors = ["David Tolnay "] - include = ["/benches/**", "/build.rs", "/Cargo.toml", "/LICENSE-APACHE", "/LICENSE-MIT", "/README.md", "/src/**", "/tests/**"] - description = "Parser for Rust source code" - documentation = "https://docs.rs/syn" - readme = "README.md" - categories = ["development-tools::procedural-macro-helpers"] - license = "MIT OR Apache-2.0" - repository = "https://github.com/dtolnay/syn" - [package.metadata.docs.rs] - all-features = true -+targets = ["x86_64-unknown-linux-gnu"] - - [package.metadata.playground] --all-features = true -- --[lib] --name = "syn" -+features = ["full", "visit", "visit-mut", "fold", "extra-traits"] - - [[bench]] - name = "rust" - harness = false - required-features = ["full", "parsing"] --edition = "2018" - - [[bench]] - name = "file" - required-features = ["full", "parsing"] --edition = "2018" - [dependencies.proc-macro2] --version = "1.0" -+version = "1.0.13" - default-features = false - - [dependencies.quote] - version = "1.0" - optional = true - default-features = false - - [dependencies.unicode-xid] - version = "0.2" -+[dev-dependencies.anyhow] -+version = "1.0" -+ -+[dev-dependencies.flate2] -+version = "1.0" -+ - [dev-dependencies.insta] --version = "0.9" -+version = "0.16" - - [dev-dependencies.rayon] - version = "1.0" - - [dev-dependencies.ref-cast] --version = "0.2" -+version = "1.0" - - [dev-dependencies.regex] - version = "1.0" - -+[dev-dependencies.reqwest] -+version = "0.10" -+features = ["blocking"] -+ -+[dev-dependencies.syn-test-suite] -+version = "0" -+ -+[dev-dependencies.tar] -+version = "0.4" -+ - [dev-dependencies.termcolor] - version = "1.0" - - [dev-dependencies.walkdir] - version = "2.1" - - [features] - clone-impls = [] - default = ["derive", "parsing", "printing", "clone-impls", "proc-macro"] - derive = [] - extra-traits = [] - fold = [] - full = [] - parsing = [] - printing = ["quote"] - proc-macro = ["proc-macro2/proc-macro", "quote/proc-macro"] -+test = ["syn-test-suite/all-features"] - visit = [] - visit-mut = [] --[badges.travis-ci] --repository = "dtolnay/syn" -diff --git a/third_party/rust/syn/README.md b/third_party/rust/syn/README.md ---- a/third_party/rust/syn/README.md -+++ b/third_party/rust/syn/README.md -@@ -1,15 +1,15 @@ - Parser for Rust source code - =========================== - --[![Build Status](https://api.travis-ci.org/dtolnay/syn.svg?branch=master)](https://travis-ci.org/dtolnay/syn) --[![Latest Version](https://img.shields.io/crates/v/syn.svg)](https://crates.io/crates/syn) --[![Rust Documentation](https://img.shields.io/badge/api-rustdoc-blue.svg)](https://docs.rs/syn/1.0/syn/) --[![Rustc Version 1.31+](https://img.shields.io/badge/rustc-1.31+-lightgray.svg)](https://blog.rust-lang.org/2018/12/06/Rust-1.31-and-rust-2018.html) -+[github](https://github.com/dtolnay/syn) -+[crates.io](https://crates.io/crates/syn) -+[docs.rs](https://docs.rs/syn) -+[build status](https://github.com/dtolnay/syn/actions?query=branch%3Amaster) - - Syn is a parsing library for parsing a stream of Rust tokens into a syntax tree - of Rust source code. - - Currently this library is geared toward use in Rust procedural macros, but - contains some APIs that may be useful more generally. - - - **Data structures** — Syn provides a complete syntax tree that can represent -@@ -41,20 +41,16 @@ contains some APIs that may be useful mo - - [`syn::File`]: https://docs.rs/syn/1.0/syn/struct.File.html - [`syn::Item`]: https://docs.rs/syn/1.0/syn/enum.Item.html - [`syn::Expr`]: https://docs.rs/syn/1.0/syn/enum.Expr.html - [`syn::Type`]: https://docs.rs/syn/1.0/syn/enum.Type.html - [`syn::DeriveInput`]: https://docs.rs/syn/1.0/syn/struct.DeriveInput.html - [parser functions]: https://docs.rs/syn/1.0/syn/parse/index.html - --If you get stuck with anything involving procedural macros in Rust I am happy to --provide help even if the issue is not related to Syn. Please file a ticket in --this repo. -- - *Version requirement: Syn supports rustc 1.31 and up.* - - [*Release notes*](https://github.com/dtolnay/syn/releases) - -
- - ## Resources - -@@ -83,18 +79,16 @@ tokens back to the compiler to compile i - syn = "1.0" - quote = "1.0" - - [lib] - proc-macro = true - ``` - - ```rust --extern crate proc_macro; -- - use proc_macro::TokenStream; - use quote::quote; - use syn::{parse_macro_input, DeriveInput}; - - #[proc_macro_derive(MyMacro)] - pub fn my_macro(input: TokenStream) -> TokenStream { - // Parse the input tokens into a syntax tree - let input = parse_macro_input!(input as DeriveInput); -@@ -266,17 +260,17 @@ incompatible ecosystems for proc macros - - In general all of your code should be written against proc-macro2 rather than - proc-macro. The one exception is in the signatures of procedural macro entry - points, which are required by the language to use `proc_macro::TokenStream`. - - The proc-macro2 crate will automatically detect and use the compiler's data - structures when a procedural macro is active. - --[proc-macro2]: https://docs.rs/proc-macro2/1.0.0/proc_macro2/ -+[proc-macro2]: https://docs.rs/proc-macro2/1.0/proc_macro2/ - -
- - #### License - - - Licensed under either of Apache License, Version - 2.0 or MIT license at your option. -diff --git a/third_party/rust/syn/benches/file.rs b/third_party/rust/syn/benches/file.rs ---- a/third_party/rust/syn/benches/file.rs -+++ b/third_party/rust/syn/benches/file.rs -@@ -1,14 +1,21 @@ - // $ cargo bench --features full --bench file - - #![feature(rustc_private, test)] -+#![recursion_limit = "1024"] - - extern crate test; - -+#[macro_use] -+#[path = "../tests/macros/mod.rs"] -+mod macros; -+ -+#[path = "../tests/common/mod.rs"] -+mod common; - #[path = "../tests/repo/mod.rs"] - pub mod repo; - - use proc_macro2::TokenStream; - use std::fs; - use std::str::FromStr; - use test::Bencher; - -diff --git a/third_party/rust/syn/benches/rust.rs b/third_party/rust/syn/benches/rust.rs ---- a/third_party/rust/syn/benches/rust.rs -+++ b/third_party/rust/syn/benches/rust.rs -@@ -1,15 +1,22 @@ - // $ cargo bench --features full --bench rust - // - // Syn only, useful for profiling: - // $ RUSTFLAGS='--cfg syn_only' cargo build --release --features full --bench rust - - #![cfg_attr(not(syn_only), feature(rustc_private))] -+#![recursion_limit = "1024"] - -+#[macro_use] -+#[path = "../tests/macros/mod.rs"] -+mod macros; -+ -+#[path = "../tests/common/mod.rs"] -+mod common; - #[path = "../tests/repo/mod.rs"] - mod repo; - - use std::fs; - use std::time::{Duration, Instant}; - - #[cfg(not(syn_only))] - mod tokenstream_parse { -@@ -23,41 +30,45 @@ mod tokenstream_parse { - - mod syn_parse { - pub fn bench(content: &str) -> Result<(), ()> { - syn::parse_file(content).map(drop).map_err(drop) - } - } - - #[cfg(not(syn_only))] --mod libsyntax_parse { -+mod librustc_parse { - extern crate rustc_data_structures; -- extern crate syntax; -- extern crate syntax_pos; -+ extern crate rustc_errors; -+ extern crate rustc_parse; -+ extern crate rustc_session; -+ extern crate rustc_span; - - use rustc_data_structures::sync::Lrc; -- use syntax::edition::Edition; -- use syntax::errors::{emitter::Emitter, DiagnosticBuilder, Handler}; -- use syntax::parse::ParseSess; -- use syntax::source_map::{FilePathMapping, SourceMap}; -- use syntax_pos::FileName; -+ use rustc_errors::{emitter::Emitter, Diagnostic, Handler}; -+ use rustc_session::parse::ParseSess; -+ use rustc_span::source_map::{FilePathMapping, SourceMap}; -+ use rustc_span::{edition::Edition, FileName}; - - pub fn bench(content: &str) -> Result<(), ()> { - struct SilentEmitter; - - impl Emitter for SilentEmitter { -- fn emit_diagnostic(&mut self, _db: &DiagnosticBuilder) {} -+ fn emit_diagnostic(&mut self, _diag: &Diagnostic) {} -+ fn source_map(&self) -> Option<&Lrc> { -+ None -+ } - } - -- syntax::with_globals(Edition::Edition2018, || { -+ rustc_span::with_session_globals(Edition::Edition2018, || { - let cm = Lrc::new(SourceMap::new(FilePathMapping::empty())); - let emitter = Box::new(SilentEmitter); - let handler = Handler::with_emitter(false, None, emitter); - let sess = ParseSess::with_span_handler(handler, cm); -- if let Err(mut diagnostic) = syntax::parse::parse_crate_from_source_str( -+ if let Err(mut diagnostic) = rustc_parse::parse_crate_from_source_str( - FileName::Custom("bench".to_owned()), - content.to_owned(), - &sess, - ) { - diagnostic.cancel(); - return Err(()); - }; - Ok(()) -@@ -99,21 +110,21 @@ fn exec(mut codepath: impl FnMut(&str) - - assert_eq!(success, total); - begin.elapsed() - } - - fn main() { - repo::clone_rust(); - - macro_rules! testcases { -- ($($(#[$cfg:meta])* $name:path,)*) => { -+ ($($(#[$cfg:meta])* $name:ident,)*) => { - vec![ - $( - $(#[$cfg])* -- (stringify!($name), $name as fn(&str) -> Result<(), ()>), -+ (stringify!($name), $name::bench as fn(&str) -> Result<(), ()>), - )* - ] - }; - } - - #[cfg(not(syn_only))] - { - let mut lines = 0; -@@ -123,22 +134,22 @@ fn main() { - files += 1; - Ok(()) - }); - eprintln!("\n{} lines in {} files", lines, files); - } - - for (name, f) in testcases!( - #[cfg(not(syn_only))] -- read_from_disk::bench, -+ read_from_disk, - #[cfg(not(syn_only))] -- tokenstream_parse::bench, -- syn_parse::bench, -+ tokenstream_parse, -+ syn_parse, - #[cfg(not(syn_only))] -- libsyntax_parse::bench, -+ librustc_parse, - ) { - eprint!("{:20}", format!("{}:", name)); - let elapsed = exec(f); - eprintln!( - "elapsed={}.{:03}s", - elapsed.as_secs(), - elapsed.subsec_millis(), - ); -diff --git a/third_party/rust/syn/build.rs b/third_party/rust/syn/build.rs ---- a/third_party/rust/syn/build.rs -+++ b/third_party/rust/syn/build.rs -@@ -1,11 +1,11 @@ - use std::env; - use std::process::Command; --use std::str::{self, FromStr}; -+use std::str; - - // The rustc-cfg strings below are *not* public API. Please let us know by - // opening a GitHub issue if your build environment requires some way to enable - // these cfgs other than by executing our build script. - fn main() { - let compiler = match rustc_version() { - Some(compiler) => compiler, - None => return, -@@ -21,43 +21,19 @@ fn main() { - } - - struct Compiler { - minor: u32, - nightly: bool, - } - - fn rustc_version() -> Option { -- let rustc = match env::var_os("RUSTC") { -- Some(rustc) => rustc, -- None => return None, -- }; -- -- let output = match Command::new(rustc).arg("--version").output() { -- Ok(output) => output, -- Err(_) => return None, -- }; -- -- let version = match str::from_utf8(&output.stdout) { -- Ok(version) => version, -- Err(_) => return None, -- }; -- -+ let rustc = env::var_os("RUSTC")?; -+ let output = Command::new(rustc).arg("--version").output().ok()?; -+ let version = str::from_utf8(&output.stdout).ok()?; - let mut pieces = version.split('.'); - if pieces.next() != Some("rustc 1") { - return None; - } -- -- let next = match pieces.next() { -- Some(next) => next, -- None => return None, -- }; -- -- let minor = match u32::from_str(next) { -- Ok(minor) => minor, -- Err(_) => return None, -- }; -- -- Some(Compiler { -- minor: minor, -- nightly: version.contains("nightly"), -- }) -+ let minor = pieces.next()?.parse().ok()?; -+ let nightly = version.contains("nightly"); -+ Some(Compiler { minor, nightly }) - } -diff --git a/third_party/rust/syn/src/attr.rs b/third_party/rust/syn/src/attr.rs ---- a/third_party/rust/syn/src/attr.rs -+++ b/third_party/rust/syn/src/attr.rs -@@ -4,25 +4,21 @@ use crate::punctuated::Punctuated; - use std::iter; - - use proc_macro2::TokenStream; - - #[cfg(feature = "parsing")] - use crate::parse::{Parse, ParseBuffer, ParseStream, Parser, Result}; - #[cfg(feature = "parsing")] - use crate::punctuated::Pair; --#[cfg(feature = "extra-traits")] --use crate::tt::TokenStreamHelper; --#[cfg(feature = "extra-traits")] --use std::hash::{Hash, Hasher}; - - ast_struct! { - /// An attribute like `#[repr(transparent)]`. - /// -- /// *This type is available if Syn is built with the `"derive"` or `"full"` -+ /// *This type is available only if Syn is built with the `"derive"` or `"full"` - /// feature.* - /// - ///
- /// - /// # Syntax - /// - /// Rust has six types of attributes. - /// -@@ -106,58 +102,69 @@ ast_struct! { - /// If the attribute you are parsing is expected to conform to the - /// conventional structured form of attribute, use [`parse_meta()`] to - /// obtain that structured representation. If the attribute follows some - /// other grammar of its own, use [`parse_args()`] to parse that into the - /// expected data structure. - /// - /// [`parse_meta()`]: Attribute::parse_meta - /// [`parse_args()`]: Attribute::parse_args -- pub struct Attribute #manual_extra_traits { -+ /// -+ ///


-+ /// -+ /// # Doc comments -+ /// -+ /// The compiler transforms doc comments, such as `/// comment` and `/*! -+ /// comment */`, into attributes before macros are expanded. Each comment is -+ /// expanded into an attribute of the form `#[doc = r"comment"]`. -+ /// -+ /// As an example, the following `mod` items are expanded identically: -+ /// -+ /// ``` -+ /// # use syn::{ItemMod, parse_quote}; -+ /// let doc: ItemMod = parse_quote! { -+ /// /// Single line doc comments -+ /// /// We write so many! -+ /// /** -+ /// * Multi-line comments... -+ /// * May span many lines -+ /// */ -+ /// mod example { -+ /// //! Of course, they can be inner too -+ /// /*! And fit in a single line */ -+ /// } -+ /// }; -+ /// let attr: ItemMod = parse_quote! { -+ /// #[doc = r" Single line doc comments"] -+ /// #[doc = r" We write so many!"] -+ /// #[doc = r" -+ /// * Multi-line comments... -+ /// * May span many lines -+ /// "] -+ /// mod example { -+ /// #![doc = r" Of course, they can be inner too"] -+ /// #![doc = r" And fit in a single line "] -+ /// } -+ /// }; -+ /// assert_eq!(doc, attr); -+ /// ``` -+ pub struct Attribute { - pub pound_token: Token![#], - pub style: AttrStyle, - pub bracket_token: token::Bracket, - pub path: Path, - pub tokens: TokenStream, - } - } - --#[cfg(feature = "extra-traits")] --impl Eq for Attribute {} -- --#[cfg(feature = "extra-traits")] --impl PartialEq for Attribute { -- fn eq(&self, other: &Self) -> bool { -- self.style == other.style -- && self.pound_token == other.pound_token -- && self.bracket_token == other.bracket_token -- && self.path == other.path -- && TokenStreamHelper(&self.tokens) == TokenStreamHelper(&other.tokens) -- } --} -- --#[cfg(feature = "extra-traits")] --impl Hash for Attribute { -- fn hash(&self, state: &mut H) -- where -- H: Hasher, -- { -- self.style.hash(state); -- self.pound_token.hash(state); -- self.bracket_token.hash(state); -- self.path.hash(state); -- TokenStreamHelper(&self.tokens).hash(state); -- } --} -- - impl Attribute { - /// Parses the content of the attribute, consisting of the path and tokens, - /// as a [`Meta`] if possible. - /// -- /// *This function is available if Syn is built with the `"parsing"` -+ /// *This function is available only if Syn is built with the `"parsing"` - /// feature.* - #[cfg(feature = "parsing")] - pub fn parse_meta(&self) -> Result { - fn clone_ident_segment(segment: &PathSegment) -> PathSegment { - PathSegment { - ident: segment.ident.clone(), - arguments: PathArguments::None, - } -@@ -194,91 +201,95 @@ impl Attribute { - /// parser; and - /// - the error message has a more useful span when `tokens` is empty. - /// - /// ```text - /// #[my_attr(value < 5)] - /// ^^^^^^^^^ what gets parsed - /// ``` - /// -- /// *This function is available if Syn is built with the `"parsing"` -+ /// *This function is available only if Syn is built with the `"parsing"` - /// feature.* - #[cfg(feature = "parsing")] - pub fn parse_args(&self) -> Result { - self.parse_args_with(T::parse) - } - - /// Parse the arguments to the attribute using the given parser. - /// -- /// *This function is available if Syn is built with the `"parsing"` -+ /// *This function is available only if Syn is built with the `"parsing"` - /// feature.* - #[cfg(feature = "parsing")] - pub fn parse_args_with(&self, parser: F) -> Result { - let parser = |input: ParseStream| { - let args = enter_args(self, input)?; - parse::parse_stream(parser, &args) - }; - parser.parse2(self.tokens.clone()) - } - - /// Parses zero or more outer attributes from the stream. - /// -- /// *This function is available if Syn is built with the `"parsing"` -+ /// *This function is available only if Syn is built with the `"parsing"` - /// feature.* - #[cfg(feature = "parsing")] - pub fn parse_outer(input: ParseStream) -> Result> { - let mut attrs = Vec::new(); - while input.peek(Token![#]) { - attrs.push(input.call(parsing::single_parse_outer)?); - } - Ok(attrs) - } - - /// Parses zero or more inner attributes from the stream. - /// -- /// *This function is available if Syn is built with the `"parsing"` -+ /// *This function is available only if Syn is built with the `"parsing"` - /// feature.* - #[cfg(feature = "parsing")] - pub fn parse_inner(input: ParseStream) -> Result> { - let mut attrs = Vec::new(); - while input.peek(Token![#]) && input.peek2(Token![!]) { - attrs.push(input.call(parsing::single_parse_inner)?); - } - Ok(attrs) - } - } - - #[cfg(feature = "parsing")] --fn error_expected_args(attr: &Attribute) -> Error { -+fn expected_parentheses(attr: &Attribute) -> String { - let style = match attr.style { - AttrStyle::Outer => "#", - AttrStyle::Inner(_) => "#!", - }; - - let mut path = String::new(); - for segment in &attr.path.segments { - if !path.is_empty() || attr.path.leading_colon.is_some() { - path += "::"; - } - path += &segment.ident.to_string(); - } - -- let msg = format!("expected attribute arguments: {}[{}(...)]", style, path); -- -- #[cfg(feature = "printing")] -- return Error::new_spanned(attr, msg); -- -- #[cfg(not(feature = "printing"))] -- return Error::new(attr.bracket_token.span, msg); -+ format!("{}[{}(...)]", style, path) - } - - #[cfg(feature = "parsing")] - fn enter_args<'a>(attr: &Attribute, input: ParseStream<'a>) -> Result> { - if input.is_empty() { -- return Err(error_expected_args(attr)); -+ let expected = expected_parentheses(attr); -+ let msg = format!("expected attribute arguments in parentheses: {}", expected); -+ return Err(crate::error::new2( -+ attr.pound_token.span, -+ attr.bracket_token.span, -+ msg, -+ )); -+ } else if input.peek(Token![=]) { -+ let expected = expected_parentheses(attr); -+ let msg = format!("expected parentheses: {}", expected); -+ return Err(input.error(msg)); - }; - - let content; - if input.peek(token::Paren) { - parenthesized!(content in input); - } else if input.peek(token::Bracket) { - bracketed!(content in input); - } else if input.peek(token::Brace) { -@@ -293,41 +304,40 @@ fn enter_args<'a>(attr: &Attribute, inpu - Err(input.error("unexpected token in attribute arguments")) - } - } - - ast_enum! { - /// Distinguishes between attributes that decorate an item and attributes - /// that are contained within an item. - /// -- /// *This type is available if Syn is built with the `"derive"` or `"full"` -+ /// *This type is available only if Syn is built with the `"derive"` or `"full"` - /// feature.* - /// - /// # Outer attributes - /// - /// - `#[repr(transparent)]` - /// - `/// # Example` - /// - `/** Please file an issue */` - /// - /// # Inner attributes - /// - /// - `#![feature(proc_macro)]` - /// - `//! # Example` - /// - `/*! Please file an issue */` -- #[cfg_attr(feature = "clone-impls", derive(Copy))] - pub enum AttrStyle { - Outer, - Inner(Token![!]), - } - } - - ast_enum_of_structs! { - /// Content of a compile-time structured attribute. - /// -- /// *This type is available if Syn is built with the `"derive"` or `"full"` -+ /// *This type is available only if Syn is built with the `"derive"` or `"full"` - /// feature.* - /// - /// ## Path - /// - /// A meta path is like the `test` in `#[test]`. - /// - /// ## List - /// -@@ -355,29 +365,29 @@ ast_enum_of_structs! { - /// A name-value pair within an attribute, like `feature = "nightly"`. - NameValue(MetaNameValue), - } - } - - ast_struct! { - /// A structured list within an attribute, like `derive(Copy, Clone)`. - /// -- /// *This type is available if Syn is built with the `"derive"` or -+ /// *This type is available only if Syn is built with the `"derive"` or - /// `"full"` feature.* - pub struct MetaList { - pub path: Path, - pub paren_token: token::Paren, - pub nested: Punctuated, - } - } - - ast_struct! { - /// A name-value pair within an attribute, like `feature = "nightly"`. - /// -- /// *This type is available if Syn is built with the `"derive"` or -+ /// *This type is available only if Syn is built with the `"derive"` or - /// `"full"` feature.* - pub struct MetaNameValue { - pub path: Path, - pub eq_token: Token![=], - pub lit: Lit, - } - } - -@@ -393,17 +403,17 @@ impl Meta { - Meta::NameValue(meta) => &meta.path, - } - } - } - - ast_enum_of_structs! { - /// Element of a compile-time attribute list. - /// -- /// *This type is available if Syn is built with the `"derive"` or `"full"` -+ /// *This type is available only if Syn is built with the `"derive"` or `"full"` - /// feature.* - pub enum NestedMeta { - /// A structured meta item, like the `Copy` in `#[derive(Copy)]` which - /// would be a nested `Meta::Path`. - Meta(Meta), - - /// A Rust literal, like the `"new_name"` in `#[rename("new_name")]`. - Lit(Lit), -@@ -424,18 +434,18 @@ ast_enum_of_structs! { - /// /* ... */ - /// } - /// ``` - /// - /// The implementation of this macro would want to parse its attribute arguments - /// as type `AttributeArgs`. - /// - /// ``` --/// extern crate proc_macro; --/// -+/// # extern crate proc_macro; -+/// # - /// use proc_macro::TokenStream; - /// use syn::{parse_macro_input, AttributeArgs, ItemFn}; - /// - /// # const IGNORE: &str = stringify! { - /// #[proc_macro_attribute] - /// # }; - /// pub fn my_attribute(args: TokenStream, input: TokenStream) -> TokenStream { - /// let args = parse_macro_input!(args as AttributeArgs); -@@ -459,27 +469,27 @@ where - T: IntoIterator, - { - type Ret = iter::Filter bool>; - - fn outer(self) -> Self::Ret { - fn is_outer(attr: &&Attribute) -> bool { - match attr.style { - AttrStyle::Outer => true, -- _ => false, -+ AttrStyle::Inner(_) => false, - } - } - self.into_iter().filter(is_outer) - } - - fn inner(self) -> Self::Ret { - fn is_inner(attr: &&Attribute) -> bool { - match attr.style { - AttrStyle::Inner(_) => true, -- _ => false, -+ AttrStyle::Outer => false, - } - } - self.into_iter().filter(is_inner) - } - } - - #[cfg(feature = "parsing")] - pub mod parsing { -diff --git a/third_party/rust/syn/src/buffer.rs b/third_party/rust/syn/src/buffer.rs ---- a/third_party/rust/syn/src/buffer.rs -+++ b/third_party/rust/syn/src/buffer.rs -@@ -1,12 +1,12 @@ - //! A stably addressed token buffer supporting efficient traversal based on a - //! cheaply copyable cursor. - //! --//! *This module is available if Syn is built with the `"parsing"` feature.* -+//! *This module is available only if Syn is built with the `"parsing"` feature.* - - // This module is heavily commented as it contains most of the unsafe code in - // Syn, and caution should be used when editing it. The public-facing interface - // is 100% safe but the implementation is fragile internally. - - #[cfg(all( - not(all(target_arch = "wasm32", any(target_os = "unknown", target_os = "wasi"))), - feature = "proc-macro" -@@ -31,17 +31,17 @@ enum Entry { - // token tree, or null if this is the outermost level. - End(*const Entry), - } - - /// A buffer that can be efficiently traversed multiple times, unlike - /// `TokenStream` which requires a deep copy in order to traverse more than - /// once. - /// --/// *This type is available if Syn is built with the `"parsing"` feature.* -+/// *This type is available only if Syn is built with the `"parsing"` feature.* - pub struct TokenBuffer { - // NOTE: Do not derive clone on this - there are raw pointers inside which - // will be messed up. Moving the `TokenBuffer` itself is safe as the actual - // backing slices won't be moved. - data: Box<[Entry]>, - } - - impl TokenBuffer { -@@ -93,17 +93,17 @@ impl TokenBuffer { - } - - TokenBuffer { data: entries } - } - - /// Creates a `TokenBuffer` containing all the tokens from the input - /// `TokenStream`. - /// -- /// *This method is available if Syn is built with both the `"parsing"` and -+ /// *This method is available only if Syn is built with both the `"parsing"` and - /// `"proc-macro"` features.* - #[cfg(all( - not(all(target_arch = "wasm32", any(target_os = "unknown", target_os = "wasi"))), - feature = "proc-macro" - ))] - pub fn new(stream: pm::TokenStream) -> TokenBuffer { - Self::new2(stream.into()) - } -@@ -128,18 +128,17 @@ impl TokenBuffer { - /// and copied around. - /// - /// An empty `Cursor` can be created directly, or one may create a `TokenBuffer` - /// object and get a cursor to its first token with `begin()`. - /// - /// Two cursors are equal if they have the same location in the same input - /// stream, and have the same scope. - /// --/// *This type is available if Syn is built with the `"parsing"` feature.* --#[derive(Copy, Clone, Eq, PartialEq)] -+/// *This type is available only if Syn is built with the `"parsing"` feature.* - pub struct Cursor<'a> { - // The current entry which the `Cursor` is pointing at. - ptr: *const Entry, - // This is the only `Entry::End(..)` object which this cursor is allowed to - // point at. All other `End` objects are skipped over in `Cursor::create`. - scope: *const Entry, - // Cursor is covariant in 'a. This field ensures that our pointers are still - // valid. -@@ -196,37 +195,38 @@ impl<'a> Cursor<'a> { - - /// Bump the cursor to point at the next token after the current one. This - /// is undefined behavior if the cursor is currently looking at an - /// `Entry::End`. - unsafe fn bump(self) -> Cursor<'a> { - Cursor::create(self.ptr.offset(1), self.scope) - } - -- /// If the cursor is looking at a `None`-delimited group, move it to look at -- /// the first token inside instead. If the group is empty, this will move -+ /// While the cursor is looking at a `None`-delimited group, move it to look -+ /// at the first token inside instead. If the group is empty, this will move - /// the cursor past the `None`-delimited group. - /// - /// WARNING: This mutates its argument. - fn ignore_none(&mut self) { -- if let Entry::Group(group, buf) = self.entry() { -+ while let Entry::Group(group, buf) = self.entry() { - if group.delimiter() == Delimiter::None { - // NOTE: We call `Cursor::create` here to make sure that - // situations where we should immediately exit the span after - // entering it are handled correctly. - unsafe { - *self = Cursor::create(&buf.data[0], self.scope); - } -+ } else { -+ break; - } - } - } - - /// Checks whether the cursor is currently pointing at the end of its valid - /// scope. -- #[inline] - pub fn eof(self) -> bool { - // We're at eof if we're at the end of our scope. - self.ptr == self.scope - } - - /// If the cursor is pointing at a `Group` with the given delimiter, returns - /// a cursor into that group and one pointing to the next `TokenTree`. - pub fn group(mut self, delim: Delimiter) -> Option<(Cursor<'a>, Span, Cursor<'a>)> { -@@ -337,16 +337,54 @@ impl<'a> Cursor<'a> { - match self.entry() { - Entry::Group(group, _) => group.span(), - Entry::Literal(l) => l.span(), - Entry::Ident(t) => t.span(), - Entry::Punct(o) => o.span(), - Entry::End(..) => Span::call_site(), - } - } -+ -+ /// Skip over the next token without cloning it. Returns `None` if this -+ /// cursor points to eof. -+ /// -+ /// This method treats `'lifetimes` as a single token. -+ pub(crate) fn skip(self) -> Option> { -+ match self.entry() { -+ Entry::End(..) => None, -+ -+ // Treat lifetimes as a single tt for the purposes of 'skip'. -+ Entry::Punct(op) if op.as_char() == '\'' && op.spacing() == Spacing::Joint => { -+ let next = unsafe { self.bump() }; -+ match next.entry() { -+ Entry::Ident(_) => Some(unsafe { next.bump() }), -+ _ => Some(next), -+ } -+ } -+ _ => Some(unsafe { self.bump() }), -+ } -+ } -+} -+ -+impl<'a> Copy for Cursor<'a> {} -+ -+impl<'a> Clone for Cursor<'a> { -+ fn clone(&self) -> Self { -+ *self -+ } -+} -+ -+impl<'a> Eq for Cursor<'a> {} -+ -+impl<'a> PartialEq for Cursor<'a> { -+ fn eq(&self, other: &Self) -> bool { -+ let Cursor { ptr, scope, marker } = self; -+ let _ = marker; -+ *ptr == other.ptr && *scope == other.scope -+ } - } - - pub(crate) fn same_scope(a: Cursor, b: Cursor) -> bool { - a.scope == b.scope - } - - pub(crate) fn open_span_of_group(cursor: Cursor) -> Span { - match cursor.entry() { -diff --git a/third_party/rust/syn/src/custom_keyword.rs b/third_party/rust/syn/src/custom_keyword.rs ---- a/third_party/rust/syn/src/custom_keyword.rs -+++ b/third_party/rust/syn/src/custom_keyword.rs -@@ -81,46 +81,46 @@ - /// value: input.parse()?, - /// }) - /// } else { - /// Err(lookahead.error()) - /// } - /// } - /// } - /// ``` --#[macro_export(local_inner_macros)] -+#[macro_export] - macro_rules! custom_keyword { - ($ident:ident) => { - #[allow(non_camel_case_types)] - pub struct $ident { - pub span: $crate::export::Span, - } - - #[doc(hidden)] -- #[allow(non_snake_case)] -+ #[allow(dead_code, non_snake_case)] - pub fn $ident<__S: $crate::export::IntoSpans<[$crate::export::Span; 1]>>( - span: __S, - ) -> $ident { - $ident { - span: $crate::export::IntoSpans::into_spans(span)[0], - } - } - - impl $crate::export::Default for $ident { - fn default() -> Self { - $ident { - span: $crate::export::Span::call_site(), - } - } - } - -- impl_parse_for_custom_keyword!($ident); -- impl_to_tokens_for_custom_keyword!($ident); -- impl_clone_for_custom_keyword!($ident); -- impl_extra_traits_for_custom_keyword!($ident); -+ $crate::impl_parse_for_custom_keyword!($ident); -+ $crate::impl_to_tokens_for_custom_keyword!($ident); -+ $crate::impl_clone_for_custom_keyword!($ident); -+ $crate::impl_extra_traits_for_custom_keyword!($ident); - }; - } - - // Not public API. - #[cfg(feature = "parsing")] - #[doc(hidden)] - #[macro_export] - macro_rules! impl_parse_for_custom_keyword { -diff --git a/third_party/rust/syn/src/custom_punctuation.rs b/third_party/rust/syn/src/custom_punctuation.rs ---- a/third_party/rust/syn/src/custom_punctuation.rs -+++ b/third_party/rust/syn/src/custom_punctuation.rs -@@ -69,67 +69,67 @@ - /// Ok(tokens) - /// } - /// - /// fn main() { - /// let input = r#" a::b c::d::e "#; - /// let _: PathSegments = syn::parse_str(input).unwrap(); - /// } - /// ``` --#[macro_export(local_inner_macros)] -+#[macro_export] - macro_rules! custom_punctuation { - ($ident:ident, $($tt:tt)+) => { - pub struct $ident { -- pub spans: custom_punctuation_repr!($($tt)+), -+ pub spans: $crate::custom_punctuation_repr!($($tt)+), - } - - #[doc(hidden)] -- #[allow(non_snake_case)] -- pub fn $ident<__S: $crate::export::IntoSpans>( -+ #[allow(dead_code, non_snake_case)] -+ pub fn $ident<__S: $crate::export::IntoSpans<$crate::custom_punctuation_repr!($($tt)+)>>( - spans: __S, - ) -> $ident { -- let _validate_len = 0 $(+ custom_punctuation_len!(strict, $tt))*; -+ let _validate_len = 0 $(+ $crate::custom_punctuation_len!(strict, $tt))*; - $ident { - spans: $crate::export::IntoSpans::into_spans(spans) - } - } - - impl $crate::export::Default for $ident { - fn default() -> Self { - $ident($crate::export::Span::call_site()) - } - } - -- impl_parse_for_custom_punctuation!($ident, $($tt)+); -- impl_to_tokens_for_custom_punctuation!($ident, $($tt)+); -- impl_clone_for_custom_punctuation!($ident, $($tt)+); -- impl_extra_traits_for_custom_punctuation!($ident, $($tt)+); -+ $crate::impl_parse_for_custom_punctuation!($ident, $($tt)+); -+ $crate::impl_to_tokens_for_custom_punctuation!($ident, $($tt)+); -+ $crate::impl_clone_for_custom_punctuation!($ident, $($tt)+); -+ $crate::impl_extra_traits_for_custom_punctuation!($ident, $($tt)+); - }; - } - - // Not public API. - #[cfg(feature = "parsing")] - #[doc(hidden)] --#[macro_export(local_inner_macros)] -+#[macro_export] - macro_rules! impl_parse_for_custom_punctuation { - ($ident:ident, $($tt:tt)+) => { - impl $crate::token::CustomToken for $ident { - fn peek(cursor: $crate::buffer::Cursor) -> bool { -- $crate::token::parsing::peek_punct(cursor, stringify_punct!($($tt)+)) -+ $crate::token::parsing::peek_punct(cursor, $crate::stringify_punct!($($tt)+)) - } - - fn display() -> &'static $crate::export::str { -- custom_punctuation_concat!("`", stringify_punct!($($tt)+), "`") -+ concat!("`", $crate::stringify_punct!($($tt)+), "`") - } - } - - impl $crate::parse::Parse for $ident { - fn parse(input: $crate::parse::ParseStream) -> $crate::parse::Result<$ident> { -- let spans: custom_punctuation_repr!($($tt)+) = -- $crate::token::parsing::punct(input, stringify_punct!($($tt)+))?; -+ let spans: $crate::custom_punctuation_repr!($($tt)+) = -+ $crate::token::parsing::punct(input, $crate::stringify_punct!($($tt)+))?; - Ok($ident(spans)) - } - } - }; - } - - // Not public API. - #[cfg(not(feature = "parsing"))] -@@ -137,22 +137,22 @@ macro_rules! impl_parse_for_custom_punct - #[macro_export] - macro_rules! impl_parse_for_custom_punctuation { - ($ident:ident, $($tt:tt)+) => {}; - } - - // Not public API. - #[cfg(feature = "printing")] - #[doc(hidden)] --#[macro_export(local_inner_macros)] -+#[macro_export] - macro_rules! impl_to_tokens_for_custom_punctuation { - ($ident:ident, $($tt:tt)+) => { - impl $crate::export::ToTokens for $ident { - fn to_tokens(&self, tokens: &mut $crate::export::TokenStream2) { -- $crate::token::printing::punct(stringify_punct!($($tt)+), &self.spans, tokens) -+ $crate::token::printing::punct($crate::stringify_punct!($($tt)+), &self.spans, tokens) - } - } - }; - } - - // Not public API. - #[cfg(not(feature = "printing"))] - #[doc(hidden)] -@@ -216,26 +216,26 @@ macro_rules! impl_extra_traits_for_custo - #[doc(hidden)] - #[macro_export] - macro_rules! impl_extra_traits_for_custom_punctuation { - ($ident:ident, $($tt:tt)+) => {}; - } - - // Not public API. - #[doc(hidden)] --#[macro_export(local_inner_macros)] -+#[macro_export] - macro_rules! custom_punctuation_repr { - ($($tt:tt)+) => { -- [$crate::export::Span; 0 $(+ custom_punctuation_len!(lenient, $tt))+] -+ [$crate::export::Span; 0 $(+ $crate::custom_punctuation_len!(lenient, $tt))+] - }; - } - - // Not public API. - #[doc(hidden)] --#[macro_export(local_inner_macros)] -+#[macro_export] - #[rustfmt::skip] - macro_rules! custom_punctuation_len { - ($mode:ident, +) => { 1 }; - ($mode:ident, +=) => { 2 }; - ($mode:ident, &) => { 1 }; - ($mode:ident, &&) => { 2 }; - ($mode:ident, &=) => { 2 }; - ($mode:ident, @) => { 1 }; -@@ -274,17 +274,17 @@ macro_rules! custom_punctuation_len { - ($mode:ident, <<=) => { 3 }; - ($mode:ident, >>) => { 2 }; - ($mode:ident, >>=) => { 3 }; - ($mode:ident, *) => { 1 }; - ($mode:ident, -) => { 1 }; - ($mode:ident, -=) => { 2 }; - ($mode:ident, ~) => { 1 }; - (lenient, $tt:tt) => { 0 }; -- (strict, $tt:tt) => {{ custom_punctuation_unexpected!($tt); 0 }}; -+ (strict, $tt:tt) => {{ $crate::custom_punctuation_unexpected!($tt); 0 }}; - } - - // Not public API. - #[doc(hidden)] - #[macro_export] - macro_rules! custom_punctuation_unexpected { - () => {}; - } -@@ -292,18 +292,8 @@ macro_rules! custom_punctuation_unexpect - // Not public API. - #[doc(hidden)] - #[macro_export] - macro_rules! stringify_punct { - ($($tt:tt)+) => { - concat!($(stringify!($tt)),+) - }; - } -- --// Not public API. --// Without this, local_inner_macros breaks when looking for concat! --#[doc(hidden)] --#[macro_export] --macro_rules! custom_punctuation_concat { -- ($($tt:tt)*) => { -- concat!($($tt)*) -- }; --} -diff --git a/third_party/rust/syn/src/data.rs b/third_party/rust/syn/src/data.rs ---- a/third_party/rust/syn/src/data.rs -+++ b/third_party/rust/syn/src/data.rs -@@ -1,15 +1,15 @@ - use super::*; - use crate::punctuated::Punctuated; - - ast_struct! { - /// An enum variant. - /// -- /// *This type is available if Syn is built with the `"derive"` or `"full"` -+ /// *This type is available only if Syn is built with the `"derive"` or `"full"` - /// feature.* - pub struct Variant { - /// Attributes tagged on the variant. - pub attrs: Vec, - - /// Name of the variant. - pub ident: Ident, - -@@ -19,17 +19,17 @@ ast_struct! { - /// Explicit discriminant: `Variant = 1` - pub discriminant: Option<(Token![=], Expr)>, - } - } - - ast_enum_of_structs! { - /// Data stored within an enum variant or struct. - /// -- /// *This type is available if Syn is built with the `"derive"` or `"full"` -+ /// *This type is available only if Syn is built with the `"derive"` or `"full"` - /// feature.* - /// - /// # Syntax tree enum - /// - /// This type is a [syntax tree enum]. - /// - /// [syntax tree enum]: enum.Expr.html#syntax-tree-enums - // -@@ -47,28 +47,28 @@ ast_enum_of_structs! { - Unit, - } - } - - ast_struct! { - /// Named fields of a struct or struct variant such as `Point { x: f64, - /// y: f64 }`. - /// -- /// *This type is available if Syn is built with the `"derive"` or -+ /// *This type is available only if Syn is built with the `"derive"` or - /// `"full"` feature.* - pub struct FieldsNamed { - pub brace_token: token::Brace, - pub named: Punctuated, - } - } - - ast_struct! { - /// Unnamed fields of a tuple struct or tuple variant such as `Some(T)`. - /// -- /// *This type is available if Syn is built with the `"derive"` or -+ /// *This type is available only if Syn is built with the `"derive"` or - /// `"full"` feature.* - pub struct FieldsUnnamed { - pub paren_token: token::Paren, - pub unnamed: Punctuated, - } - } - - impl Fields { -@@ -88,16 +88,34 @@ impl Fields { - /// struct or variant's fields uniformly. - pub fn iter_mut(&mut self) -> punctuated::IterMut { - match self { - Fields::Unit => crate::punctuated::empty_punctuated_iter_mut(), - Fields::Named(f) => f.named.iter_mut(), - Fields::Unnamed(f) => f.unnamed.iter_mut(), - } - } -+ -+ /// Returns the number of fields. -+ pub fn len(&self) -> usize { -+ match self { -+ Fields::Unit => 0, -+ Fields::Named(f) => f.named.len(), -+ Fields::Unnamed(f) => f.unnamed.len(), -+ } -+ } -+ -+ /// Returns `true` if there are zero fields. -+ pub fn is_empty(&self) -> bool { -+ match self { -+ Fields::Unit => true, -+ Fields::Named(f) => f.named.is_empty(), -+ Fields::Unnamed(f) => f.unnamed.is_empty(), -+ } -+ } - } - - impl IntoIterator for Fields { - type Item = Field; - type IntoIter = punctuated::IntoIter; - - fn into_iter(self) -> Self::IntoIter { - match self { -@@ -124,17 +142,17 @@ impl<'a> IntoIterator for &'a mut Fields - fn into_iter(self) -> Self::IntoIter { - self.iter_mut() - } - } - - ast_struct! { - /// A field of a struct or enum variant. - /// -- /// *This type is available if Syn is built with the `"derive"` or `"full"` -+ /// *This type is available only if Syn is built with the `"derive"` or `"full"` - /// feature.* - pub struct Field { - /// Attributes tagged on the field. - pub attrs: Vec, - - /// Visibility of the field. - pub vis: Visibility, - -@@ -149,17 +167,17 @@ ast_struct! { - pub ty: Type, - } - } - - ast_enum_of_structs! { - /// The visibility level of an item: inherited or `pub` or - /// `pub(restricted)`. - /// -- /// *This type is available if Syn is built with the `"derive"` or `"full"` -+ /// *This type is available only if Syn is built with the `"derive"` or `"full"` - /// feature.* - /// - /// # Syntax tree enum - /// - /// This type is a [syntax tree enum]. - /// - /// [syntax tree enum]: enum.Expr.html#syntax-tree-enums - // -@@ -179,58 +197,61 @@ ast_enum_of_structs! { - /// An inherited visibility, which usually means private. - Inherited, - } - } - - ast_struct! { - /// A public visibility level: `pub`. - /// -- /// *This type is available if Syn is built with the `"derive"` or -+ /// *This type is available only if Syn is built with the `"derive"` or - /// `"full"` feature.* - pub struct VisPublic { - pub pub_token: Token![pub], - } - } - - ast_struct! { - /// A crate-level visibility: `crate`. - /// -- /// *This type is available if Syn is built with the `"derive"` or -+ /// *This type is available only if Syn is built with the `"derive"` or - /// `"full"` feature.* - pub struct VisCrate { - pub crate_token: Token![crate], - } - } - - ast_struct! { - /// A visibility level restricted to some path: `pub(self)` or - /// `pub(super)` or `pub(crate)` or `pub(in some::module)`. - /// -- /// *This type is available if Syn is built with the `"derive"` or -+ /// *This type is available only if Syn is built with the `"derive"` or - /// `"full"` feature.* - pub struct VisRestricted { - pub pub_token: Token![pub], - pub paren_token: token::Paren, - pub in_token: Option, - pub path: Box, - } - } - - #[cfg(feature = "parsing")] - pub mod parsing { - use super::*; - - use crate::ext::IdentExt; -+ use crate::parse::discouraged::Speculative; - use crate::parse::{Parse, ParseStream, Result}; - - impl Parse for Variant { - fn parse(input: ParseStream) -> Result { -+ let attrs = input.call(Attribute::parse_outer)?; -+ let _visibility: Visibility = input.parse()?; - Ok(Variant { -- attrs: input.call(Attribute::parse_outer)?, -+ attrs, - ident: input.parse()?, - fields: { - if input.peek(token::Brace) { - Fields::Named(input.parse()?) - } else if input.peek(token::Paren) { - Fields::Unnamed(input.parse()?) - } else { - Fields::Unit -@@ -290,68 +311,99 @@ pub mod parsing { - colon_token: None, - ty: input.parse()?, - }) - } - } - - impl Parse for Visibility { - fn parse(input: ParseStream) -> Result { -+ // Recognize an empty None-delimited group, as produced by a $:vis -+ // matcher that matched no tokens. -+ if input.peek(token::Group) { -+ let ahead = input.fork(); -+ let group = crate::group::parse_group(&ahead)?; -+ if group.content.is_empty() { -+ input.advance_to(&ahead); -+ return Ok(Visibility::Inherited); -+ } -+ } -+ - if input.peek(Token![pub]) { - Self::parse_pub(input) - } else if input.peek(Token![crate]) { - Self::parse_crate(input) - } else { - Ok(Visibility::Inherited) - } - } - } - - impl Visibility { - fn parse_pub(input: ParseStream) -> Result { - let pub_token = input.parse::()?; - - if input.peek(token::Paren) { -- // TODO: optimize using advance_to - let ahead = input.fork(); -- let mut content; -- parenthesized!(content in ahead); - -+ let content; -+ let paren_token = parenthesized!(content in ahead); - if content.peek(Token![crate]) - || content.peek(Token![self]) - || content.peek(Token![super]) - { -+ let path = content.call(Ident::parse_any)?; -+ -+ // Ensure there are no additional tokens within `content`. -+ // Without explicitly checking, we may misinterpret a tuple -+ // field as a restricted visibility, causing a parse error. -+ // e.g. `pub (crate::A, crate::B)` (Issue #720). -+ if content.is_empty() { -+ input.advance_to(&ahead); -+ return Ok(Visibility::Restricted(VisRestricted { -+ pub_token, -+ paren_token, -+ in_token: None, -+ path: Box::new(Path::from(path)), -+ })); -+ } -+ } else if content.peek(Token![in]) { -+ let in_token: Token![in] = content.parse()?; -+ let path = content.call(Path::parse_mod_style)?; -+ -+ input.advance_to(&ahead); - return Ok(Visibility::Restricted(VisRestricted { - pub_token, -- paren_token: parenthesized!(content in input), -- in_token: None, -- path: Box::new(Path::from(content.call(Ident::parse_any)?)), -- })); -- } else if content.peek(Token![in]) { -- return Ok(Visibility::Restricted(VisRestricted { -- pub_token, -- paren_token: parenthesized!(content in input), -- in_token: Some(content.parse()?), -- path: Box::new(content.call(Path::parse_mod_style)?), -+ paren_token, -+ in_token: Some(in_token), -+ path: Box::new(path), - })); - } - } - - Ok(Visibility::Public(VisPublic { pub_token })) - } - - fn parse_crate(input: ParseStream) -> Result { - if input.peek2(Token![::]) { - Ok(Visibility::Inherited) - } else { - Ok(Visibility::Crate(VisCrate { - crate_token: input.parse()?, - })) - } - } -+ -+ #[cfg(feature = "full")] -+ pub(crate) fn is_some(&self) -> bool { -+ match self { -+ Visibility::Inherited => false, -+ _ => true, -+ } -+ } - } - } - - #[cfg(feature = "printing")] - mod printing { - use super::*; - - use proc_macro2::TokenStream; -diff --git a/third_party/rust/syn/src/derive.rs b/third_party/rust/syn/src/derive.rs ---- a/third_party/rust/syn/src/derive.rs -+++ b/third_party/rust/syn/src/derive.rs -@@ -1,15 +1,15 @@ - use super::*; - use crate::punctuated::Punctuated; - - ast_struct! { - /// Data structure sent to a `proc_macro_derive` macro. - /// -- /// *This type is available if Syn is built with the `"derive"` feature.* -+ /// *This type is available only if Syn is built with the `"derive"` feature.* - pub struct DeriveInput { - /// Attributes tagged on the whole struct or enum. - pub attrs: Vec, - - /// Visibility of the struct or enum. - pub vis: Visibility, - - /// Name of the struct or enum. -@@ -21,17 +21,17 @@ ast_struct! { - /// Data within the struct or enum. - pub data: Data, - } - } - - ast_enum_of_structs! { - /// The storage of a struct, enum or union data structure. - /// -- /// *This type is available if Syn is built with the `"derive"` feature.* -+ /// *This type is available only if Syn is built with the `"derive"` feature.* - /// - /// # Syntax tree enum - /// - /// This type is a [syntax tree enum]. - /// - /// [syntax tree enum]: enum.Expr.html#syntax-tree-enums - // - // TODO: change syntax-tree-enum link to an intra rustdoc link, currently -@@ -48,41 +48,41 @@ ast_enum_of_structs! { - } - - do_not_generate_to_tokens - } - - ast_struct! { - /// A struct input to a `proc_macro_derive` macro. - /// -- /// *This type is available if Syn is built with the `"derive"` -+ /// *This type is available only if Syn is built with the `"derive"` - /// feature.* - pub struct DataStruct { - pub struct_token: Token![struct], - pub fields: Fields, - pub semi_token: Option, - } - } - - ast_struct! { - /// An enum input to a `proc_macro_derive` macro. - /// -- /// *This type is available if Syn is built with the `"derive"` -+ /// *This type is available only if Syn is built with the `"derive"` - /// feature.* - pub struct DataEnum { - pub enum_token: Token![enum], - pub brace_token: token::Brace, - pub variants: Punctuated, - } - } - - ast_struct! { - /// An untagged union input to a `proc_macro_derive` macro. - /// -- /// *This type is available if Syn is built with the `"derive"` -+ /// *This type is available only if Syn is built with the `"derive"` - /// feature.* - pub struct DataUnion { - pub union_token: Token![union], - pub fields: FieldsNamed, - } - } - - #[cfg(feature = "parsing")] -diff --git a/third_party/rust/syn/src/discouraged.rs b/third_party/rust/syn/src/discouraged.rs ---- a/third_party/rust/syn/src/discouraged.rs -+++ b/third_party/rust/syn/src/discouraged.rs -@@ -11,17 +11,17 @@ pub trait Speculative { - /// stream to the fork to "commit" the parsing from the fork to the main - /// stream. - /// - /// If you can avoid doing this, you should, as it limits the ability to - /// generate useful errors. That said, it is often the only way to parse - /// syntax of the form `A* B*` for arbitrary syntax `A` and `B`. The problem - /// is that when the fork fails to parse an `A`, it's impossible to tell - /// whether that was because of a syntax error and the user meant to provide -- /// an `A`, or that the `A`s are finished and its time to start parsing -+ /// an `A`, or that the `A`s are finished and it's time to start parsing - /// `B`s. Use with care. - /// - /// Also note that if `A` is a subset of `B`, `A* B*` can be parsed by - /// parsing `B*` and removing the leading members of `A` from the - /// repetition, bypassing the need to involve the downsides associated with - /// speculative parsing. - /// - /// [`ParseStream::fork`]: ParseBuffer::fork -@@ -67,17 +67,16 @@ pub trait Speculative { - /// # } - /// - /// impl Parse for PathSegment { - /// fn parse(input: ParseStream) -> Result { - /// if input.peek(Token![super]) - /// || input.peek(Token![self]) - /// || input.peek(Token![Self]) - /// || input.peek(Token![crate]) -- /// || input.peek(Token![extern]) - /// { - /// let ident = input.call(Ident::parse_any)?; - /// return Ok(PathSegment::from(ident)); - /// } - /// - /// let ident = input.parse()?; - /// if input.peek(Token![::]) && input.peek3(Token![<]) { - /// return Ok(PathSegment { -@@ -159,13 +158,37 @@ pub trait Speculative { - } - - impl<'a> Speculative for ParseBuffer<'a> { - fn advance_to(&self, fork: &Self) { - if !crate::buffer::same_scope(self.cursor(), fork.cursor()) { - panic!("Fork was not derived from the advancing parse stream"); - } - -+ let (self_unexp, self_sp) = inner_unexpected(self); -+ let (fork_unexp, fork_sp) = inner_unexpected(fork); -+ if !Rc::ptr_eq(&self_unexp, &fork_unexp) { -+ match (fork_sp, self_sp) { -+ // Unexpected set on the fork, but not on `self`, copy it over. -+ (Some(span), None) => { -+ self_unexp.set(Unexpected::Some(span)); -+ } -+ // Unexpected unset. Use chain to propagate errors from fork. -+ (None, None) => { -+ fork_unexp.set(Unexpected::Chain(self_unexp)); -+ -+ // Ensure toplevel 'unexpected' tokens from the fork don't -+ // bubble up the chain by replacing the root `unexpected` -+ // pointer, only 'unexpected' tokens from existing group -+ // parsers should bubble. -+ fork.unexpected -+ .set(Some(Rc::new(Cell::new(Unexpected::None)))); -+ } -+ // Unexpected has been set on `self`. No changes needed. -+ (_, Some(_)) => {} -+ } -+ } -+ - // See comment on `cell` in the struct definition. - self.cell - .set(unsafe { mem::transmute::>(fork.cursor()) }) - } - } -diff --git a/third_party/rust/syn/src/error.rs b/third_party/rust/syn/src/error.rs ---- a/third_party/rust/syn/src/error.rs -+++ b/third_party/rust/syn/src/error.rs -@@ -1,9 +1,8 @@ --use std; - use std::fmt::{self, Debug, Display}; - use std::iter::FromIterator; - use std::slice; - use std::vec; - - use proc_macro2::{ - Delimiter, Group, Ident, LexError, Literal, Punct, Spacing, Span, TokenStream, TokenTree, - }; -@@ -27,18 +26,18 @@ pub type Result = std::result::Result - /// message than simply panicking the macro. - /// - /// [`compile_error!`]: https://doc.rust-lang.org/std/macro.compile_error.html - /// - /// When parsing macro input, the [`parse_macro_input!`] macro handles the - /// conversion to `compile_error!` automatically. - /// - /// ``` --/// extern crate proc_macro; --/// -+/// # extern crate proc_macro; -+/// # - /// use proc_macro::TokenStream; - /// use syn::{parse_macro_input, AttributeArgs, ItemFn}; - /// - /// # const IGNORE: &str = stringify! { - /// #[proc_macro_attribute] - /// # }; - /// pub fn my_attr(args: TokenStream, input: TokenStream) -> TokenStream { - /// let args = parse_macro_input!(args as AttributeArgs); -@@ -77,17 +76,16 @@ pub type Result = std::result::Result - /// # use proc_macro2::TokenStream; - /// # use syn::{DeriveInput, Result}; - /// # - /// # pub fn my_derive(input: DeriveInput) -> Result { - /// # unimplemented!() - /// # } - /// # } - /// ``` --#[derive(Clone)] - pub struct Error { - messages: Vec, - } - - struct ErrorMessage { - // Span is implemented as an index into a thread-local interner to keep the - // size small. It is not safe to access from a different thread. We want - // errors to be Send and Sync to play nicely with the Failure crate, so pin -@@ -245,16 +243,27 @@ pub fn new_at(scope: Span, c - if cursor.eof() { - Error::new(scope, format!("unexpected end of input, {}", message)) - } else { - let span = crate::buffer::open_span_of_group(cursor); - Error::new(span, message) - } - } - -+#[cfg(all(feature = "parsing", any(feature = "full", feature = "derive")))] -+pub fn new2(start: Span, end: Span, message: T) -> Error { -+ Error { -+ messages: vec![ErrorMessage { -+ start_span: ThreadBound::new(start), -+ end_span: ThreadBound::new(end), -+ message: message.to_string(), -+ }], -+ } -+} -+ - impl Debug for Error { - fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result { - if self.messages.len() == 1 { - formatter - .debug_tuple("Error") - .field(&self.messages[0]) - .finish() - } else { -@@ -273,16 +282,24 @@ impl Debug for ErrorMessage { - } - - impl Display for Error { - fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result { - formatter.write_str(&self.messages[0].message) - } - } - -+impl Clone for Error { -+ fn clone(&self) -> Self { -+ Error { -+ messages: self.messages.clone(), -+ } -+ } -+} -+ - impl Clone for ErrorMessage { - fn clone(&self) -> Self { - let start = self - .start_span - .get() - .cloned() - .unwrap_or_else(Span::call_site); - let end = self.end_span.get().cloned().unwrap_or_else(Span::call_site); -@@ -350,8 +367,16 @@ impl<'a> Iterator for Iter<'a> { - type Item = Error; - - fn next(&mut self) -> Option { - Some(Error { - messages: vec![self.messages.next()?.clone()], - }) - } - } -+ -+impl Extend for Error { -+ fn extend>(&mut self, iter: T) { -+ for err in iter { -+ self.combine(err); -+ } -+ } -+} -diff --git a/third_party/rust/syn/src/expr.rs b/third_party/rust/syn/src/expr.rs ---- a/third_party/rust/syn/src/expr.rs -+++ b/third_party/rust/syn/src/expr.rs -@@ -1,23 +1,26 @@ - use super::*; - use crate::punctuated::Punctuated; --#[cfg(feature = "extra-traits")] --use crate::tt::TokenStreamHelper; -+#[cfg(feature = "full")] -+use crate::reserved::Reserved; - use proc_macro2::{Span, TokenStream}; --#[cfg(feature = "extra-traits")] -+#[cfg(feature = "printing")] -+use quote::IdentFragment; -+#[cfg(feature = "printing")] -+use std::fmt::{self, Display}; - use std::hash::{Hash, Hasher}; --#[cfg(all(feature = "parsing", feature = "full"))] -+#[cfg(feature = "parsing")] - use std::mem; - - ast_enum_of_structs! { - /// A Rust expression. - /// -- /// *This type is available if Syn is built with the `"derive"` or `"full"` -- /// feature.* -+ /// *This type is available only if Syn is built with the `"derive"` or `"full"` -+ /// feature, but most of the variants are not available unless "full" is enabled.* - /// - /// # Syntax tree enums - /// - /// This type is a syntax tree enum. In Syn this and other syntax tree enums - /// are designed to be traversed using the following rebinding idiom. - /// - /// ``` - /// # use syn::Expr; -@@ -78,17 +81,17 @@ ast_enum_of_structs! { - /// if let Expr::Tuple(base) = *discriminant.base { - /// # } - /// # } - /// ``` - /// - /// A sign that you may not be choosing the right variable names is if you - /// see names getting repeated in your code, like accessing - /// `receiver.receiver` or `pat.pat` or `cond.cond`. -- pub enum Expr #manual_extra_traits { -+ pub enum Expr { - /// A slice literal expression: `[a, b, c, d]`. - Array(ExprArray), - - /// An assignment expression: `a = compute()`. - Assign(ExprAssign), - - /// A compound assignment expression: `counter += 1`. - AssignOp(ExprAssignOp), -@@ -223,191 +226,191 @@ ast_enum_of_structs! { - #[doc(hidden)] - __Nonexhaustive, - } - } - - ast_struct! { - /// A slice literal expression: `[a, b, c, d]`. - /// -- /// *This type is available if Syn is built with the `"full"` feature.* -+ /// *This type is available only if Syn is built with the `"full"` feature.* - pub struct ExprArray #full { - pub attrs: Vec, - pub bracket_token: token::Bracket, - pub elems: Punctuated, - } - } - - ast_struct! { - /// An assignment expression: `a = compute()`. - /// -- /// *This type is available if Syn is built with the `"full"` feature.* -+ /// *This type is available only if Syn is built with the `"full"` feature.* - pub struct ExprAssign #full { - pub attrs: Vec, - pub left: Box, - pub eq_token: Token![=], - pub right: Box, - } - } - - ast_struct! { - /// A compound assignment expression: `counter += 1`. - /// -- /// *This type is available if Syn is built with the `"full"` feature.* -+ /// *This type is available only if Syn is built with the `"full"` feature.* - pub struct ExprAssignOp #full { - pub attrs: Vec, - pub left: Box, - pub op: BinOp, - pub right: Box, - } - } - - ast_struct! { - /// An async block: `async { ... }`. - /// -- /// *This type is available if Syn is built with the `"full"` feature.* -+ /// *This type is available only if Syn is built with the `"full"` feature.* - pub struct ExprAsync #full { - pub attrs: Vec, - pub async_token: Token![async], - pub capture: Option, - pub block: Block, - } - } - - ast_struct! { - /// An await expression: `fut.await`. - /// -- /// *This type is available if Syn is built with the `"full"` feature.* -+ /// *This type is available only if Syn is built with the `"full"` feature.* - pub struct ExprAwait #full { - pub attrs: Vec, - pub base: Box, - pub dot_token: Token![.], - pub await_token: token::Await, - } - } - - ast_struct! { - /// A binary operation: `a + b`, `a * b`. - /// -- /// *This type is available if Syn is built with the `"derive"` or -+ /// *This type is available only if Syn is built with the `"derive"` or - /// `"full"` feature.* - pub struct ExprBinary { - pub attrs: Vec, - pub left: Box, - pub op: BinOp, - pub right: Box, - } - } - - ast_struct! { - /// A blocked scope: `{ ... }`. - /// -- /// *This type is available if Syn is built with the `"full"` feature.* -+ /// *This type is available only if Syn is built with the `"full"` feature.* - pub struct ExprBlock #full { - pub attrs: Vec, - pub label: Option