diff options
Diffstat (limited to 'vendor/syn')
| -rw-r--r-- | vendor/syn/.cargo-checksum.json | 2 | ||||
| -rw-r--r-- | vendor/syn/Cargo.toml | 11 | ||||
| -rw-r--r-- | vendor/syn/benches/file.rs | 34 | ||||
| -rw-r--r-- | vendor/syn/src/buffer.rs | 102 | ||||
| -rw-r--r-- | vendor/syn/src/lib.rs | 4 | ||||
| -rw-r--r-- | vendor/syn/tests/common/eq.rs | 47 | ||||
| -rw-r--r-- | vendor/syn/tests/test_derive_input.rs | 2 | ||||
| -rw-r--r-- | vendor/syn/tests/test_stmt.rs | 2 |
8 files changed, 139 insertions, 65 deletions
diff --git a/vendor/syn/.cargo-checksum.json b/vendor/syn/.cargo-checksum.json index 8ea280f0f..691cc4e06 100644 --- a/vendor/syn/.cargo-checksum.json +++ b/vendor/syn/.cargo-checksum.json @@ -1 +1 @@ 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\ No newline at end of file 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\ No newline at end of file diff --git a/vendor/syn/Cargo.toml b/vendor/syn/Cargo.toml index acd07cc81..d03ee2e31 100644 --- a/vendor/syn/Cargo.toml +++ b/vendor/syn/Cargo.toml @@ -13,7 +13,7 @@ edition = "2018" rust-version = "1.31" name = "syn" -version = "1.0.98" +version = "1.0.99" authors = ["David Tolnay <dtolnay@gmail.com>"] include = [ "/benches/**", @@ -28,7 +28,14 @@ include = [ description = "Parser for Rust source code" documentation = "https://docs.rs/syn" readme = "README.md" -categories = ["development-tools::procedural-macro-helpers"] +keywords = [ + "macros", + "syn", +] +categories = [ + "development-tools::procedural-macro-helpers", + "parser-implementations", +] license = "MIT OR Apache-2.0" repository = "https://github.com/dtolnay/syn" diff --git a/vendor/syn/benches/file.rs b/vendor/syn/benches/file.rs index 86204df2d..c500dc24a 100644 --- a/vendor/syn/benches/file.rs +++ b/vendor/syn/benches/file.rs @@ -2,7 +2,11 @@ #![feature(rustc_private, test)] #![recursion_limit = "1024"] -#![allow(clippy::missing_panics_doc, clippy::must_use_candidate)] +#![allow( + clippy::items_after_statements, + clippy::missing_panics_doc, + clippy::must_use_candidate +)] extern crate test; @@ -15,17 +19,37 @@ mod common; #[path = "../tests/repo/mod.rs"] pub mod repo; -use proc_macro2::TokenStream; +use proc_macro2::{Span, TokenStream}; use std::fs; use std::str::FromStr; +use syn::parse::{ParseStream, Parser}; use test::Bencher; const FILE: &str = "tests/rust/library/core/src/str/mod.rs"; -#[bench] -fn parse_file(b: &mut Bencher) { +fn get_tokens() -> TokenStream { repo::clone_rust(); let content = fs::read_to_string(FILE).unwrap(); - let tokens = TokenStream::from_str(&content).unwrap(); + TokenStream::from_str(&content).unwrap() +} + +#[bench] +fn baseline(b: &mut Bencher) { + let tokens = get_tokens(); + b.iter(|| drop(tokens.clone())); +} + +#[bench] +fn create_token_buffer(b: &mut Bencher) { + let tokens = get_tokens(); + fn immediate_fail(_input: ParseStream) -> syn::Result<()> { + Err(syn::Error::new(Span::call_site(), "")) + } + b.iter(|| immediate_fail.parse2(tokens.clone())); +} + +#[bench] +fn parse_file(b: &mut Bencher) { + let tokens = get_tokens(); b.iter(|| syn::parse2::<syn::File>(tokens.clone())); } diff --git a/vendor/syn/src/buffer.rs b/vendor/syn/src/buffer.rs index 2cb6690f0..2c8e21bdb 100644 --- a/vendor/syn/src/buffer.rs +++ b/vendor/syn/src/buffer.rs @@ -14,7 +14,9 @@ use crate::proc_macro as pm; use crate::Lifetime; use proc_macro2::{Delimiter, Group, Ident, Literal, Punct, Spacing, Span, TokenStream, TokenTree}; +use std::hint; use std::marker::PhantomData; +use std::mem; use std::ptr; use std::slice; @@ -57,29 +59,39 @@ impl TokenBuffer { // NOTE: Do not mutate the Vec returned from this function once it returns; // the address of its backing memory must remain stable. fn inner_new(stream: TokenStream, up: *const Entry) -> TokenBuffer { - // Build up the entries list, recording the locations of any Groups - // in the list to be processed later. - let mut entries = Vec::new(); - let mut groups = Vec::new(); - for tt in stream { + let iterator = stream.into_iter(); + let mut entries = Vec::with_capacity(iterator.size_hint().0 + 1); + let mut next_index_after_last_group = 0; + for tt in iterator { match tt { - TokenTree::Ident(sym) => { - entries.push(Entry::Ident(sym)); + TokenTree::Ident(ident) => { + entries.push(Entry::Ident(ident)); } - TokenTree::Punct(op) => { - entries.push(Entry::Punct(op)); + TokenTree::Punct(punct) => { + entries.push(Entry::Punct(punct)); } - TokenTree::Literal(l) => { - entries.push(Entry::Literal(l)); + TokenTree::Literal(literal) => { + entries.push(Entry::Literal(literal)); } - TokenTree::Group(g) => { - // Record the index of the interesting entry, and store an - // `End(null)` there temporarily. - groups.push((entries.len(), g)); - entries.push(Entry::End(ptr::null())); + TokenTree::Group(group) => { + // We cannot fill in a real `End` pointer until `entries` is + // finished growing and getting potentially reallocated. + // Instead, we temporarily coopt the spot where the end + // pointer would go, and use it to string together an + // intrusive linked list of all the Entry::Group entries in + // the vector. Later after `entries` is done growing, we'll + // traverse the linked list and fill in all the end + // pointers with a correct value. + let group_up = + ptr::null::<u8>().wrapping_add(next_index_after_last_group) as *const Entry; + + let inner = Self::inner_new(group.stream(), group_up); + entries.push(Entry::Group(group, inner)); + next_index_after_last_group = entries.len(); } } } + // Add an `End` entry to the end with a reference to the enclosing token // stream which was passed in. entries.push(Entry::End(up)); @@ -90,20 +102,36 @@ impl TokenBuffer { // pointer into it. let entries = entries.into_boxed_slice(); let len = entries.len(); + // Convert boxed slice into a pointer to the first element early, to // avoid invalidating pointers into this slice when we move the Box. // See https://github.com/rust-lang/unsafe-code-guidelines/issues/326 let entries = Box::into_raw(entries) as *mut Entry; - for (idx, group) in groups { - // We know that this index refers to one of the temporary - // `End(null)` entries, and we know that the last entry is - // `End(up)`, so the next index is also valid. - let group_up = unsafe { entries.add(idx + 1) }; - - // The end entry stored at the end of this Entry::Group should - // point to the Entry which follows the Group in the list. - let inner = Self::inner_new(group.stream(), group_up); - unsafe { *entries.add(idx) = Entry::Group(group, inner) }; + + // Traverse intrusive linked list of Entry::Group entries and fill in + // correct End pointers. + while let Some(idx) = next_index_after_last_group.checked_sub(1) { + // We know that idx refers to one of the Entry::Group entries, and + // that the very last entry is an Entry::End, so the next index + // after any group entry is a valid index. + let group_up = unsafe { entries.add(next_index_after_last_group) }; + + // Linked list only takes us to entries which are of type Group. + let token_buffer = match unsafe { &*entries.add(idx) } { + Entry::Group(_group, token_buffer) => token_buffer, + _ => unsafe { hint::unreachable_unchecked() }, + }; + + // Last entry in any TokenBuffer is of type End. + let buffer_ptr = token_buffer.ptr as *mut Entry; + let last_entry = unsafe { &mut *buffer_ptr.add(token_buffer.len - 1) }; + let end_ptr_slot = match last_entry { + Entry::End(end_ptr_slot) => end_ptr_slot, + _ => unsafe { hint::unreachable_unchecked() }, + }; + + // Step to next element in linked list. + next_index_after_last_group = mem::replace(end_ptr_slot, group_up) as usize; } TokenBuffer { ptr: entries, len } @@ -275,7 +303,9 @@ impl<'a> Cursor<'a> { pub fn punct(mut self) -> Option<(Punct, Cursor<'a>)> { self.ignore_none(); match self.entry() { - Entry::Punct(op) if op.as_char() != '\'' => Some((op.clone(), unsafe { self.bump() })), + Entry::Punct(punct) if punct.as_char() != '\'' => { + Some((punct.clone(), unsafe { self.bump() })) + } _ => None, } } @@ -285,7 +315,7 @@ impl<'a> Cursor<'a> { pub fn literal(mut self) -> Option<(Literal, Cursor<'a>)> { self.ignore_none(); match self.entry() { - Entry::Literal(lit) => Some((lit.clone(), unsafe { self.bump() })), + Entry::Literal(literal) => Some((literal.clone(), unsafe { self.bump() })), _ => None, } } @@ -295,12 +325,12 @@ impl<'a> Cursor<'a> { pub fn lifetime(mut self) -> Option<(Lifetime, Cursor<'a>)> { self.ignore_none(); match self.entry() { - Entry::Punct(op) if op.as_char() == '\'' && op.spacing() == Spacing::Joint => { + Entry::Punct(punct) if punct.as_char() == '\'' && punct.spacing() == Spacing::Joint => { let next = unsafe { self.bump() }; match next.ident() { Some((ident, rest)) => { let lifetime = Lifetime { - apostrophe: op.span(), + apostrophe: punct.span(), ident, }; Some((lifetime, rest)) @@ -334,9 +364,9 @@ impl<'a> Cursor<'a> { pub fn token_tree(self) -> Option<(TokenTree, Cursor<'a>)> { let tree = match self.entry() { Entry::Group(group, _) => group.clone().into(), - Entry::Literal(lit) => lit.clone().into(), + Entry::Literal(literal) => literal.clone().into(), Entry::Ident(ident) => ident.clone().into(), - Entry::Punct(op) => op.clone().into(), + Entry::Punct(punct) => punct.clone().into(), Entry::End(..) => return None, }; @@ -348,9 +378,9 @@ impl<'a> Cursor<'a> { pub fn span(self) -> Span { match self.entry() { Entry::Group(group, _) => group.span(), - Entry::Literal(l) => l.span(), - Entry::Ident(t) => t.span(), - Entry::Punct(o) => o.span(), + Entry::Literal(literal) => literal.span(), + Entry::Ident(ident) => ident.span(), + Entry::Punct(punct) => punct.span(), Entry::End(..) => Span::call_site(), } } @@ -364,7 +394,7 @@ impl<'a> Cursor<'a> { 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 => { + Entry::Punct(punct) if punct.as_char() == '\'' && punct.spacing() == Spacing::Joint => { let next = unsafe { self.bump() }; match next.entry() { Entry::Ident(_) => Some(unsafe { next.bump() }), diff --git a/vendor/syn/src/lib.rs b/vendor/syn/src/lib.rs index 608c39876..09addd3a6 100644 --- a/vendor/syn/src/lib.rs +++ b/vendor/syn/src/lib.rs @@ -250,15 +250,17 @@ //! dynamic library libproc_macro from rustc toolchain. // Syn types in rustdoc of other crates get linked to here. -#![doc(html_root_url = "https://docs.rs/syn/1.0.98")] +#![doc(html_root_url = "https://docs.rs/syn/1.0.99")] #![cfg_attr(doc_cfg, feature(doc_cfg))] #![allow(non_camel_case_types)] #![allow( clippy::cast_lossless, clippy::cast_possible_truncation, + clippy::cast_ptr_alignment, clippy::default_trait_access, clippy::doc_markdown, clippy::expl_impl_clone_on_copy, + clippy::explicit_auto_deref, clippy::if_not_else, clippy::inherent_to_string, clippy::large_enum_variant, diff --git a/vendor/syn/tests/common/eq.rs b/vendor/syn/tests/common/eq.rs index a6c379165..ff100aa41 100644 --- a/vendor/syn/tests/common/eq.rs +++ b/vendor/syn/tests/common/eq.rs @@ -24,6 +24,7 @@ use rustc_ast::ast::Block; use rustc_ast::ast::BlockCheckMode; use rustc_ast::ast::BorrowKind; use rustc_ast::ast::CaptureBy; +use rustc_ast::ast::ClosureBinder; use rustc_ast::ast::Const; use rustc_ast::ast::Crate; use rustc_ast::ast::Defaultness; @@ -145,7 +146,7 @@ impl<T: ?Sized + SpanlessEq> SpanlessEq for Box<T> { } } -impl<T: SpanlessEq> SpanlessEq for P<T> { +impl<T: ?Sized + SpanlessEq> SpanlessEq for P<T> { fn eq(&self, other: &Self) -> bool { SpanlessEq::eq(&**self, &**other) } @@ -466,9 +467,10 @@ spanless_eq_enum!(BindingMode; ByRef(0) ByValue(0)); spanless_eq_enum!(BlockCheckMode; Default Unsafe(0)); spanless_eq_enum!(BorrowKind; Ref Raw); spanless_eq_enum!(CaptureBy; Value Ref); +spanless_eq_enum!(ClosureBinder; NotPresent For(span generic_params)); spanless_eq_enum!(Const; Yes(0) No); spanless_eq_enum!(Defaultness; Default(0) Final); -spanless_eq_enum!(Extern; None Implicit Explicit(0)); +spanless_eq_enum!(Extern; None Implicit(0) Explicit(0 1)); spanless_eq_enum!(FloatTy; F32 F64); spanless_eq_enum!(FnRetTy; Default(0) Ty(0)); spanless_eq_enum!(ForeignItemKind; Static(0 1 2) Fn(0) TyAlias(0) MacCall(0)); @@ -498,7 +500,7 @@ spanless_eq_enum!(StmtKind; Local(0) Item(0) Expr(0) Semi(0) Empty MacCall(0)); spanless_eq_enum!(StrStyle; Cooked Raw(0)); spanless_eq_enum!(StructRest; Base(0) Rest(0) None); spanless_eq_enum!(Term; Ty(0) Const(0)); -spanless_eq_enum!(TokenTree; Token(0) Delimited(0 1 2)); +spanless_eq_enum!(TokenTree; Token(0 1) Delimited(0 1 2)); spanless_eq_enum!(TraitBoundModifier; None Maybe MaybeConst MaybeConstMaybe); spanless_eq_enum!(TraitObjectSyntax; Dyn None); spanless_eq_enum!(UintTy; Usize U8 U16 U32 U64 U128); @@ -512,7 +514,7 @@ spanless_eq_enum!(WherePredicate; BoundPredicate(0) RegionPredicate(0) EqPredica spanless_eq_enum!(ExprKind; Box(0) Array(0) ConstBlock(0) Call(0 1) MethodCall(0 1 2) Tup(0) Binary(0 1 2) Unary(0 1) Lit(0) Cast(0 1) Type(0 1) Let(0 1 2) If(0 1 2) While(0 1 2) ForLoop(0 1 2 3) Loop(0 1) Match(0 1) - Closure(0 1 2 3 4 5) Block(0 1) Async(0 1 2) Await(0) TryBlock(0) + Closure(0 1 2 3 4 5 6) Block(0 1) Async(0 1 2) Await(0) TryBlock(0) Assign(0 1 2) AssignOp(0 1 2) Field(0 1) Index(0 1) Underscore Range(0 1 2) Path(0 1) AddrOf(0 1 2) Break(0 1) Continue(0) Ret(0) InlineAsm(0) MacCall(0) Struct(0) Repeat(0 1) Paren(0) Try(0) Yield(0) Yeet(0) Err); @@ -610,7 +612,7 @@ impl SpanlessEq for TokenStream { if SpanlessEq::eq(this, other) { continue; } - if let (TokenTree::Token(this), TokenTree::Token(other)) = (this, other) { + if let (TokenTree::Token(this, _), TokenTree::Token(other, _)) = (this, other) { if match (&this.kind, &other.kind) { (TokenKind::Literal(this), TokenKind::Literal(other)) => { SpanlessEq::eq(this, other) @@ -641,10 +643,13 @@ fn doc_comment<'a>( AttrStyle::Inner => true, } { match trees.next() { - Some(TokenTree::Token(Token { - kind: TokenKind::Not, - span: _, - })) => {} + Some(TokenTree::Token( + Token { + kind: TokenKind::Not, + span: _, + }, + _spacing, + )) => {} _ => return false, } } @@ -654,21 +659,27 @@ fn doc_comment<'a>( }; let mut trees = stream.trees(); match trees.next() { - Some(TokenTree::Token(Token { - kind: TokenKind::Ident(symbol, false), - span: _, - })) if *symbol == sym::doc => {} + Some(TokenTree::Token( + Token { + kind: TokenKind::Ident(symbol, false), + span: _, + }, + _spacing, + )) if *symbol == sym::doc => {} _ => return false, } match trees.next() { - Some(TokenTree::Token(Token { - kind: TokenKind::Eq, - span: _, - })) => {} + Some(TokenTree::Token( + Token { + kind: TokenKind::Eq, + span: _, + }, + _spacing, + )) => {} _ => return false, } match trees.next() { - Some(TokenTree::Token(token)) => { + Some(TokenTree::Token(token, _spacing)) => { is_escaped_literal_token(token, unescaped) && trees.next().is_none() } _ => false, diff --git a/vendor/syn/tests/test_derive_input.rs b/vendor/syn/tests/test_derive_input.rs index 93634e577..1eff01186 100644 --- a/vendor/syn/tests/test_derive_input.rs +++ b/vendor/syn/tests/test_derive_input.rs @@ -1,4 +1,4 @@ -#![allow(clippy::too_many_lines)] +#![allow(clippy::assertions_on_result_states, clippy::too_many_lines)] #[macro_use] mod macros; diff --git a/vendor/syn/tests/test_stmt.rs b/vendor/syn/tests/test_stmt.rs index 0bca62b04..f444e5b49 100644 --- a/vendor/syn/tests/test_stmt.rs +++ b/vendor/syn/tests/test_stmt.rs @@ -1,4 +1,4 @@ -#![allow(clippy::non_ascii_literal)] +#![allow(clippy::assertions_on_result_states, clippy::non_ascii_literal)] #[macro_use] mod macros; |