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Replace rustc_data_structures::thin_vec::ThinVec with thin_vec::ThinVec.

Browse Source 
`rustc_data_structures::thin_vec::ThinVec` looks like this:
```
pub struct ThinVec<T>(Option<Box<Vec<T>>>);
```
It's just a zero word if the vector is empty, but requires two
allocations if it is non-empty. So it's only usable in cases where the
vector is empty most of the time.

This commit removes it in favour of `thin_vec::ThinVec`, which is also
word-sized, but stores the length and capacity in the same allocation as
the elements. It's good in a wider variety of situation, e.g. in enum
variants where the vector is usually/always non-empty.

The commit also:
- Sorts some `Cargo.toml` dependency lists, to make additions easier.
- Sorts some `use` item lists, to make additions easier.
- Changes `clean_trait_ref_with_bindings` to take a
  `ThinVec<TypeBinding>` rather than a `&[TypeBinding]`, because this
  avoid some unnecessary allocations.
This commit is contained in:
Nicholas Nethercote 2022-08-17 14:22:30 +10:00
parent 223d16ebbd
commit b38106b6d8
42 changed files with 174 additions and 366 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
Cargo.lock
View File

@ -3207,6 +3207,7 @@ dependencies = [
"rustc_serialize",
"rustc_span",
"smallvec",
"thin-vec",
"tracing",
]
@ -3228,6 +3229,7 @@ dependencies = [
"rustc_span",
"rustc_target",
"smallvec",
"thin-vec",
"tracing",
]
@ -3322,6 +3324,7 @@ dependencies = [
"rustc_span",
"rustc_target",
"smallvec",
"thin-vec",
"tracing",
]
@ -3446,6 +3449,7 @@ dependencies = [
"stable_deref_trait",
"stacker",
"tempfile",
"thin-vec",
"tracing",
"winapi",
]
@ -3827,6 +3831,7 @@ dependencies = [
"rustc_target",
"rustc_type_ir",
"smallvec",
"thin-vec",
"tracing",
]
@ -4014,6 +4019,7 @@ dependencies = [
"rustc_session",
"rustc_span",
"rustc_target",
"thin-vec",
"tracing",
]
@ -4036,6 +4042,7 @@ dependencies = [
"rustc_span",
"rustc_target",
"smallvec",
"thin-vec",
"tracing",
]
@ -4091,6 +4098,7 @@ dependencies = [
"indexmap",
"rustc_macros",
"smallvec",
"thin-vec",
]
[[package]]
@ -4325,6 +4333,7 @@ dependencies = [
"serde_json",
"smallvec",
"tempfile",
"thin-vec",
"tracing",
"tracing-subscriber",
"tracing-tree",
@ -4878,6 +4887,12 @@ version = "0.15.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b1141d4d61095b28419e22cb0bbf02755f5e54e0526f97f1e3d1d160e60885fb"
[[package]]
name = "thin-vec"
version = "0.2.8"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "104c2cb3180b6fb6d5b2278768e9b88b578d32ba751ea6e8d026688a40d7ed87"
[[package]]
name = "thiserror"
version = "1.0.30"

9
compiler/rustc_ast/Cargo.toml
View File

@ -7,12 +7,13 @@ edition = "2021"
doctest = false
[dependencies]
rustc_serialize = { path = "../rustc_serialize" }
tracing = "0.1"
rustc_span = { path = "../rustc_span" }
bitflags = "1.2.1"
rustc_data_structures = { path = "../rustc_data_structures" }
rustc_index = { path = "../rustc_index" }
rustc_lexer = { path = "../rustc_lexer" }
rustc_macros = { path = "../rustc_macros" }
rustc_serialize = { path = "../rustc_serialize" }
rustc_span = { path = "../rustc_span" }
smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
bitflags = "1.2.1"
thin-vec = "0.2.8"
tracing = "0.1"

4
compiler/rustc_ast/src/ast.rs
View File

@ -25,21 +25,19 @@ pub use UnsafeSource::*;
use crate::ptr::P;
use crate::token::{self, CommentKind, Delimiter};
use crate::tokenstream::{DelimSpan, LazyTokenStream, TokenStream};
use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
use rustc_data_structures::stack::ensure_sufficient_stack;
use rustc_data_structures::sync::Lrc;
use rustc_data_structures::thin_vec::ThinVec;
use rustc_macros::HashStable_Generic;
use rustc_serialize::{Decodable, Decoder, Encodable, Encoder};
use rustc_span::source_map::{respan, Spanned};
use rustc_span::symbol::{kw, sym, Ident, Symbol};
use rustc_span::{Span, DUMMY_SP};
use std::cmp::Ordering;
use std::convert::TryFrom;
use std::fmt;
use std::mem;
use thin_vec::ThinVec;
/// A "Label" is an identifier of some point in sources,
/// e.g. in the following code:

3
compiler/rustc_ast/src/tokenstream.rs
View File

@ -426,7 +426,8 @@ impl TokenStream {
let attr_annotated = if attrs.is_empty() {
tokens.create_token_stream()
} else {
let attr_data = AttributesData { attrs: attrs.to_vec().into(), tokens: tokens.clone() };
let attr_data =
AttributesData { attrs: attrs.iter().cloned().collect(), tokens: tokens.clone() };
AttrAnnotatedTokenStream::new(vec![(
AttrAnnotatedTokenTree::Attributes(attr_data),
Spacing::Alone,

13
compiler/rustc_ast_lowering/Cargo.toml
View File

@ -8,17 +8,18 @@ doctest = false
[dependencies]
rustc_arena = { path = "../rustc_arena" }
tracing = "0.1"
rustc_ast = { path = "../rustc_ast" }
rustc_ast_pretty = { path = "../rustc_ast_pretty" }
rustc_hir = { path = "../rustc_hir" }
rustc_target = { path = "../rustc_target" }
rustc_data_structures = { path = "../rustc_data_structures" }
rustc_errors = { path = "../rustc_errors" }
rustc_hir = { path = "../rustc_hir" }
rustc_index = { path = "../rustc_index" }
rustc_middle = { path = "../rustc_middle" }
rustc_macros = { path = "../rustc_macros" }
rustc_query_system = { path = "../rustc_query_system" }
rustc_span = { path = "../rustc_span" }
rustc_errors = { path = "../rustc_errors" }
rustc_session = { path = "../rustc_session" }
rustc_ast = { path = "../rustc_ast" }
rustc_span = { path = "../rustc_span" }
rustc_target = { path = "../rustc_target" }
smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
thin-vec = "0.2.8"
tracing = "0.1"

4
compiler/rustc_ast_lowering/src/expr.rs
View File

@ -7,7 +7,6 @@ use super::errors::{
use super::ResolverAstLoweringExt;
use super::{ImplTraitContext, LoweringContext, ParamMode, ParenthesizedGenericArgs};
use crate::{FnDeclKind, ImplTraitPosition};
use rustc_ast::attr;
use rustc_ast::ptr::P as AstP;
use rustc_ast::*;
@ -18,6 +17,7 @@ use rustc_hir::definitions::DefPathData;
use rustc_span::source_map::{respan, DesugaringKind, Span, Spanned};
use rustc_span::symbol::{sym, Ident};
use rustc_span::DUMMY_SP;
use thin_vec::thin_vec;
impl<'hir> LoweringContext<'_, 'hir> {
fn lower_exprs(&mut self, exprs: &[AstP<Expr>]) -> &'hir [hir::Expr<'hir>] {
@ -1535,7 +1535,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
};
attr::mk_attr_outer(allow)
};
let attrs: AttrVec = vec![attr].into();
let attrs: AttrVec = thin_vec![attr];
// `ControlFlow::Continue(val) => #[allow(unreachable_code)] val,`
let continue_arm = {

13
compiler/rustc_builtin_macros/Cargo.toml
View File

@ -7,20 +7,21 @@ edition = "2021"
doctest = false
[dependencies]
rustc_parse_format = { path = "../rustc_parse_format" }
tracing = "0.1"
rustc_ast = { path = "../rustc_ast" }
rustc_ast_pretty = { path = "../rustc_ast_pretty" }
rustc_attr = { path = "../rustc_attr" }
rustc_data_structures = { path = "../rustc_data_structures" }
rustc_errors = { path = "../rustc_errors" }
rustc_expand = { path = "../rustc_expand" }
rustc_feature = { path = "../rustc_feature" }
rustc_lexer = { path = "../rustc_lexer" }
rustc_lint_defs = { path = "../rustc_lint_defs" }
rustc_macros = { path = "../rustc_macros" }
rustc_parse_format = { path = "../rustc_parse_format" }
rustc_parse = { path = "../rustc_parse" }
rustc_target = { path = "../rustc_target" }
rustc_session = { path = "../rustc_session" }
smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
rustc_ast = { path = "../rustc_ast" }
rustc_expand = { path = "../rustc_expand" }
rustc_span = { path = "../rustc_span" }
rustc_target = { path = "../rustc_target" }
smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
thin-vec = "0.2.8"
tracing = "0.1"

6
compiler/rustc_builtin_macros/src/assert/context.rs
View File

@ -13,6 +13,7 @@ use rustc_span::{
symbol::{sym, Ident, Symbol},
Span,
};
use thin_vec::thin_vec;
pub(super) struct Context<'cx, 'a> {
// An optimization.
@ -116,11 +117,10 @@ impl<'cx, 'a> Context<'cx, 'a> {
self.cx.item(
self.span,
Ident::empty(),
vec![self.cx.attribute(attr::mk_list_item(
thin_vec![self.cx.attribute(attr::mk_list_item(
Ident::new(sym::allow, self.span),
vec![attr::mk_nested_word_item(Ident::new(sym::unused_imports, self.span))],
))]
.into(),
))],
ItemKind::Use(UseTree {
prefix: self.cx.path(self.span, self.cx.std_path(&[sym::asserting])),
kind: UseTreeKind::Nested(vec![

4
compiler/rustc_builtin_macros/src/deriving/clone.rs
View File

@ -1,12 +1,12 @@
use crate::deriving::generic::ty::*;
use crate::deriving::generic::*;
use crate::deriving::path_std;
use rustc_ast::{self as ast, Generics, ItemKind, MetaItem, VariantData};
use rustc_data_structures::fx::FxHashSet;
use rustc_expand::base::{Annotatable, ExtCtxt};
use rustc_span::symbol::{kw, sym, Ident};
use rustc_span::Span;
use thin_vec::thin_vec;
pub fn expand_deriving_clone(
cx: &mut ExtCtxt<'_>,
@ -68,7 +68,7 @@ pub fn expand_deriving_clone(
}
let inline = cx.meta_word(span, sym::inline);
let attrs = vec![cx.attribute(inline)].into();
let attrs = thin_vec![cx.attribute(inline)];
let trait_def = TraitDef {
span,
path: path_std!(clone::Clone),

3
compiler/rustc_builtin_macros/src/deriving/cmp/eq.rs
View File

@ -7,6 +7,7 @@ use rustc_data_structures::fx::FxHashSet;
use rustc_expand::base::{Annotatable, ExtCtxt};
use rustc_span::symbol::{sym, Ident};
use rustc_span::Span;
use thin_vec::thin_vec;
pub fn expand_deriving_eq(
cx: &mut ExtCtxt<'_>,
@ -20,7 +21,7 @@ pub fn expand_deriving_eq(
let hidden = rustc_ast::attr::mk_nested_word_item(Ident::new(sym::hidden, span));
let doc = rustc_ast::attr::mk_list_item(Ident::new(sym::doc, span), vec![hidden]);
let no_coverage = cx.meta_word(span, sym::no_coverage);
let attrs = vec![cx.attribute(inline), cx.attribute(doc), cx.attribute(no_coverage)].into();
let attrs = thin_vec![cx.attribute(inline), cx.attribute(doc), cx.attribute(no_coverage)];
let trait_def = TraitDef {
span,
path: path_std!(cmp::Eq),

4
compiler/rustc_builtin_macros/src/deriving/cmp/ord.rs
View File

@ -1,11 +1,11 @@
use crate::deriving::generic::ty::*;
use crate::deriving::generic::*;
use crate::deriving::path_std;
use rustc_ast::MetaItem;
use rustc_expand::base::{Annotatable, ExtCtxt};
use rustc_span::symbol::{sym, Ident};
use rustc_span::Span;
use thin_vec::thin_vec;
pub fn expand_deriving_ord(
cx: &mut ExtCtxt<'_>,
@ -15,7 +15,7 @@ pub fn expand_deriving_ord(
push: &mut dyn FnMut(Annotatable),
) {
let inline = cx.meta_word(span, sym::inline);
let attrs = vec![cx.attribute(inline)].into();
let attrs = thin_vec![cx.attribute(inline)];
let trait_def = TraitDef {
span,
path: path_std!(cmp::Ord),

4
compiler/rustc_builtin_macros/src/deriving/cmp/partial_eq.rs
View File

@ -1,12 +1,12 @@
use crate::deriving::generic::ty::*;
use crate::deriving::generic::*;
use crate::deriving::{path_local, path_std};
use rustc_ast::ptr::P;
use rustc_ast::{BinOpKind, BorrowKind, Expr, ExprKind, MetaItem, Mutability};
use rustc_expand::base::{Annotatable, ExtCtxt};
use rustc_span::symbol::sym;
use rustc_span::Span;
use thin_vec::thin_vec;
pub fn expand_deriving_partial_eq(
cx: &mut ExtCtxt<'_>,
@ -68,7 +68,7 @@ pub fn expand_deriving_partial_eq(
// No need to generate `ne`, the default suffices, and not generating it is
// faster.
let inline = cx.meta_word(span, sym::inline);
let attrs = vec![cx.attribute(inline)].into();
let attrs = thin_vec![cx.attribute(inline)];
let methods = vec![MethodDef {
name: sym::eq,
generics: Bounds::empty(),

4
compiler/rustc_builtin_macros/src/deriving/cmp/partial_ord.rs
View File

@ -1,11 +1,11 @@
use crate::deriving::generic::ty::*;
use crate::deriving::generic::*;
use crate::deriving::{path_std, pathvec_std};
use rustc_ast::MetaItem;
use rustc_expand::base::{Annotatable, ExtCtxt};
use rustc_span::symbol::{sym, Ident};
use rustc_span::Span;
use thin_vec::thin_vec;
pub fn expand_deriving_partial_ord(
cx: &mut ExtCtxt<'_>,
@ -19,7 +19,7 @@ pub fn expand_deriving_partial_ord(
Path(Path::new_(pathvec_std!(option::Option), vec![Box::new(ordering_ty)], PathKind::Std));
let inline = cx.meta_word(span, sym::inline);
let attrs = vec![cx.attribute(inline)].into();
let attrs = thin_vec![cx.attribute(inline)];
let partial_cmp_def = MethodDef {
name: sym::partial_cmp,

4
compiler/rustc_builtin_macros/src/deriving/default.rs
View File

@ -1,6 +1,5 @@
use crate::deriving::generic::ty::*;
use crate::deriving::generic::*;
use rustc_ast as ast;
use rustc_ast::{walk_list, EnumDef, VariantData};
use rustc_errors::Applicability;
@ -9,6 +8,7 @@ use rustc_span::symbol::Ident;
use rustc_span::symbol::{kw, sym};
use rustc_span::Span;
use smallvec::SmallVec;
use thin_vec::thin_vec;
pub fn expand_deriving_default(
cx: &mut ExtCtxt<'_>,
@ -20,7 +20,7 @@ pub fn expand_deriving_default(
item.visit_with(&mut DetectNonVariantDefaultAttr { cx });
let inline = cx.meta_word(span, sym::inline);
let attrs = vec![cx.attribute(inline)].into();
let attrs = thin_vec![cx.attribute(inline)];
let trait_def = TraitDef {
span,
path: Path::new(vec![kw::Default, sym::Default]),

14
compiler/rustc_builtin_macros/src/deriving/generic/mod.rs
View File

@ -162,10 +162,7 @@
pub use StaticFields::*;
pub use SubstructureFields::*;
use std::cell::RefCell;
use std::iter;
use std::vec;
use crate::deriving;
use rustc_ast::ptr::P;
use rustc_ast::{self as ast, EnumDef, Expr, Generics, PatKind};
use rustc_ast::{GenericArg, GenericParamKind, VariantData};
@ -173,11 +170,12 @@ use rustc_attr as attr;
use rustc_expand::base::{Annotatable, ExtCtxt};
use rustc_span::symbol::{kw, sym, Ident, Symbol};
use rustc_span::Span;
use std::cell::RefCell;
use std::iter;
use std::vec;
use thin_vec::thin_vec;
use ty::{Bounds, Path, Ref, Self_, Ty};
use crate::deriving;
pub mod ty;
pub struct TraitDef<'a> {
@ -716,7 +714,7 @@ impl<'a> TraitDef<'a> {
let self_type = cx.ty_path(path);
let attr = cx.attribute(cx.meta_word(self.span, sym::automatically_derived));
let attrs = vec![attr].into();
let attrs = thin_vec![attr];
let opt_trait_ref = Some(trait_ref);
cx.item(

3
compiler/rustc_builtin_macros/src/global_allocator.rs
View File

@ -9,6 +9,7 @@ use rustc_ast::{Fn, ItemKind, Mutability, Stmt, Ty, TyKind, Unsafe};
use rustc_expand::base::{Annotatable, ExtCtxt};
use rustc_span::symbol::{kw, sym, Ident, Symbol};
use rustc_span::Span;
use thin_vec::thin_vec;
pub fn expand(
ecx: &mut ExtCtxt<'_>,
@ -116,7 +117,7 @@ impl AllocFnFactory<'_, '_> {
fn attrs(&self) -> AttrVec {
let special = sym::rustc_std_internal_symbol;
let special = self.cx.meta_word(self.span, special);
vec![self.cx.attribute(special)].into()
thin_vec![self.cx.attribute(special)]
}
fn arg_ty(

5
compiler/rustc_builtin_macros/src/standard_library_imports.rs
View File

@ -6,6 +6,7 @@ use rustc_span::edition::Edition::*;
use rustc_span::hygiene::AstPass;
use rustc_span::symbol::{kw, sym, Ident, Symbol};
use rustc_span::DUMMY_SP;
use thin_vec::thin_vec;
pub fn inject(
mut krate: ast::Crate,
@ -51,7 +52,7 @@ pub fn inject(
cx.item(
span,
ident,
vec![cx.attribute(cx.meta_word(span, sym::macro_use))].into(),
thin_vec![cx.attribute(cx.meta_word(span, sym::macro_use))],
ast::ItemKind::ExternCrate(None),
),
);
@ -78,7 +79,7 @@ pub fn inject(
let use_item = cx.item(
span,
Ident::empty(),
vec![cx.attribute(cx.meta_word(span, sym::prelude_import))].into(),
thin_vec![cx.attribute(cx.meta_word(span, sym::prelude_import))],
ast::ItemKind::Use(ast::UseTree {
prefix: cx.path(span, import_path),
kind: ast::UseTreeKind::Glob,

8
compiler/rustc_builtin_macros/src/test.rs
View File

@ -1,7 +1,6 @@
/// The expansion from a test function to the appropriate test struct for libtest
/// Ideally, this code would be in libtest but for efficiency and error messages it lives here.
use crate::util::{check_builtin_macro_attribute, warn_on_duplicate_attribute};
use rustc_ast as ast;
use rustc_ast::attr;
use rustc_ast::ptr::P;
@ -11,8 +10,8 @@ use rustc_expand::base::*;
use rustc_session::Session;
use rustc_span::symbol::{sym, Ident, Symbol};
use rustc_span::Span;
use std::iter;
use thin_vec::thin_vec;
// #[test_case] is used by custom test authors to mark tests
// When building for test, it needs to make the item public and gensym the name
@ -219,7 +218,7 @@ pub fn expand_test_or_bench(
let mut test_const = cx.item(
sp,
Ident::new(item.ident.name, sp),
vec![
thin_vec![
// #[cfg(test)]
cx.attribute(attr::mk_list_item(
Ident::new(sym::cfg, attr_sp),
@ -227,8 +226,7 @@ pub fn expand_test_or_bench(
)),
// #[rustc_test_marker]
cx.attribute(cx.meta_word(attr_sp, sym::rustc_test_marker)),
]
.into(),
],
// const $ident: test::TestDescAndFn =
ast::ItemKind::Const(
ast::Defaultness::Final,

3
compiler/rustc_builtin_macros/src/test_harness.rs
View File

@ -14,6 +14,7 @@ use rustc_span::symbol::{sym, Ident, Symbol};
use rustc_span::{Span, DUMMY_SP};
use rustc_target::spec::PanicStrategy;
use smallvec::{smallvec, SmallVec};
use thin_vec::thin_vec;
use tracing::debug;
use std::{iter, mem};
@ -335,7 +336,7 @@ fn mk_main(cx: &mut TestCtxt<'_>) -> P<ast::Item> {
let main = P(ast::Item {
ident: main_id,
attrs: vec![main_attr].into(),
attrs: thin_vec![main_attr],
id: ast::DUMMY_NODE_ID,
kind: main,
vis: ast::Visibility { span: sp, kind: ast::VisibilityKind::Public, tokens: None },

27
compiler/rustc_data_structures/Cargo.toml
View File

@ -8,25 +8,26 @@ doctest = false
[dependencies]
arrayvec = { version = "0.7", default-features = false }
bitflags = "1.2.1"
cfg-if = "0.1.2"
ena = "0.14"
indexmap = { version = "1.9.1" }
tracing = "0.1"
jobserver_crate = { version = "0.1.13", package = "jobserver" }
rustc_serialize = { path = "../rustc_serialize" }
rustc_macros = { path = "../rustc_macros" }
rustc_graphviz = { path = "../rustc_graphviz" }
cfg-if = "0.1.2"
stable_deref_trait = "1.0.0"
rayon = { version = "0.4.0", package = "rustc-rayon", optional = true }
rayon-core = { version = "0.4.0", package = "rustc-rayon-core", optional = true }
rustc-hash = "1.1.0"
smallvec = { version = "1.8.1", features = ["const_generics", "union", "may_dangle"] }
rustc_index = { path = "../rustc_index", package = "rustc_index" }
bitflags = "1.2.1"
measureme = "10.0.0"
libc = "0.2"
measureme = "10.0.0"
rayon-core = { version = "0.4.0", package = "rustc-rayon-core", optional = true }
rayon = { version = "0.4.0", package = "rustc-rayon", optional = true }
rustc_graphviz = { path = "../rustc_graphviz" }
rustc-hash = "1.1.0"
rustc_index = { path = "../rustc_index", package = "rustc_index" }
rustc_macros = { path = "../rustc_macros" }
rustc_serialize = { path = "../rustc_serialize" }
smallvec = { version = "1.8.1", features = ["const_generics", "union", "may_dangle"] }
stable_deref_trait = "1.0.0"
stacker = "0.1.14"
tempfile = "3.2"
thin-vec = "0.2.8"
tracing = "0.1"
[dependencies.parking_lot]
version = "0.11"

1
compiler/rustc_data_structures/src/lib.rs
View File

@ -75,7 +75,6 @@ pub mod profiling;
pub mod sharded;
pub mod stack;
pub mod sync;
pub mod thin_vec;
pub mod tiny_list;
pub mod transitive_relation;
pub mod vec_linked_list;

2
compiler/rustc_data_structures/src/map_in_place.rs
View File

@ -1,6 +1,6 @@
use crate::thin_vec::ThinVec;
use smallvec::{Array, SmallVec};
use std::ptr;
use thin_vec::ThinVec;
pub trait MapInPlace<T>: Sized {
fn map_in_place<F>(&mut self, mut f: F)

180
compiler/rustc_data_structures/src/thin_vec.rs
View File

@ -1,180 +0,0 @@
use crate::stable_hasher::{HashStable, StableHasher};
use std::iter::FromIterator;
/// A vector type optimized for cases where this size is usually 0 (cf. `SmallVec`).
/// The `Option<Box<..>>` wrapping allows us to represent a zero sized vector with `None`,
/// which uses only a single (null) pointer.
#[derive(Clone, Encodable, Decodable, Debug, Hash, Eq, PartialEq)]
pub struct ThinVec<T>(Option<Box<Vec<T>>>);
impl<T> ThinVec<T> {
pub fn new() -> Self {
ThinVec(None)
}
pub fn iter(&self) -> std::slice::Iter<'_, T> {
self.into_iter()
}
pub fn iter_mut(&mut self) -> std::slice::IterMut<'_, T> {
self.into_iter()
}
pub fn push(&mut self, item: T) {
match *self {
ThinVec(Some(ref mut vec)) => vec.push(item),
ThinVec(None) => *self = vec![item].into(),
}
}
/// Note: if `set_len(0)` is called on a non-empty `ThinVec`, it will
/// remain in the `Some` form. This is required for some code sequences
/// (such as the one in `flat_map_in_place`) that call `set_len(0)` before
/// an operation that might panic, and then call `set_len(n)` again
/// afterwards.
pub unsafe fn set_len(&mut self, new_len: usize) {
match *self {
ThinVec(None) => {
// A prerequisite of `Vec::set_len` is that `new_len` must be
// less than or equal to capacity(). The same applies here.
if new_len != 0 {
panic!("unsafe ThinVec::set_len({})", new_len);
}
}
ThinVec(Some(ref mut vec)) => vec.set_len(new_len),
}
}
pub fn insert(&mut self, index: usize, value: T) {
match *self {
ThinVec(None) => {
if index == 0 {
*self = vec![value].into();
} else {
panic!("invalid ThinVec::insert");
}
}
ThinVec(Some(ref mut vec)) => vec.insert(index, value),
}
}
pub fn remove(&mut self, index: usize) -> T {
match self {
ThinVec(None) => panic!("invalid ThinVec::remove"),
ThinVec(Some(vec)) => vec.remove(index),
}
}
pub fn as_slice(&self) -> &[T] {
match self {
ThinVec(None) => &[],
ThinVec(Some(vec)) => vec.as_slice(),
}
}
}
impl<T> From<Vec<T>> for ThinVec<T> {
fn from(vec: Vec<T>) -> Self {
if vec.is_empty() { ThinVec(None) } else { ThinVec(Some(Box::new(vec))) }
}
}
impl<T> Into<Vec<T>> for ThinVec<T> {
fn into(self) -> Vec<T> {
match self {
ThinVec(None) => Vec::new(),
ThinVec(Some(vec)) => *vec,
}
}
}
impl<T> ::std::ops::Deref for ThinVec<T> {
type Target = [T];
fn deref(&self) -> &[T] {
match *self {
ThinVec(None) => &[],
ThinVec(Some(ref vec)) => vec,
}
}
}
impl<T> ::std::ops::DerefMut for ThinVec<T> {
fn deref_mut(&mut self) -> &mut [T] {
match *self {
ThinVec(None) => &mut [],
ThinVec(Some(ref mut vec)) => vec,
}
}
}
impl<T> FromIterator<T> for ThinVec<T> {
fn from_iter<I: IntoIterator<Item = T>>(iter: I) -> Self {
// `Vec::from_iter()` should not allocate if the iterator is empty.
let vec: Vec<_> = iter.into_iter().collect();
if vec.is_empty() { ThinVec(None) } else { ThinVec(Some(Box::new(vec))) }
}
}
impl<T> IntoIterator for ThinVec<T> {
type Item = T;
type IntoIter = std::vec::IntoIter<T>;
fn into_iter(self) -> Self::IntoIter {
// This is still performant because `Vec::new()` does not allocate.
self.0.map_or_else(Vec::new, |ptr| *ptr).into_iter()
}
}
impl<'a, T> IntoIterator for &'a ThinVec<T> {
type Item = &'a T;
type IntoIter = std::slice::Iter<'a, T>;
fn into_iter(self) -> Self::IntoIter {
self.as_ref().iter()
}
}
impl<'a, T> IntoIterator for &'a mut ThinVec<T> {
type Item = &'a mut T;
type IntoIter = std::slice::IterMut<'a, T>;
fn into_iter(self) -> Self::IntoIter {
self.as_mut().iter_mut()
}
}
impl<T> Extend<T> for ThinVec<T> {
fn extend<I: IntoIterator<Item = T>>(&mut self, iter: I) {
match *self {
ThinVec(Some(ref mut vec)) => vec.extend(iter),
ThinVec(None) => *self = iter.into_iter().collect::<Vec<_>>().into(),
}
}
fn extend_one(&mut self, item: T) {
self.push(item)
}
fn extend_reserve(&mut self, additional: usize) {
match *self {
ThinVec(Some(ref mut vec)) => vec.reserve(additional),
ThinVec(None) => *self = Vec::with_capacity(additional).into(),
}
}
}
impl<T: HashStable<CTX>, CTX> HashStable<CTX> for ThinVec<T> {
fn hash_stable(&self, hcx: &mut CTX, hasher: &mut StableHasher) {
(**self).hash_stable(hcx, hasher)
}
}
impl<T> Default for ThinVec<T> {
fn default() -> Self {
Self(None)
}
}
#[cfg(test)]
mod tests;

42
compiler/rustc_data_structures/src/thin_vec/tests.rs
View File

@ -1,42 +0,0 @@
use super::*;
impl<T> ThinVec<T> {
fn into_vec(self) -> Vec<T> {
self.into()
}
}
#[test]
fn test_from_iterator() {
assert_eq!(std::iter::empty().collect::<ThinVec<String>>().into_vec(), Vec::<String>::new());
assert_eq!(std::iter::once(42).collect::<ThinVec<_>>().into_vec(), vec![42]);
assert_eq!([1, 2].into_iter().collect::<ThinVec<_>>().into_vec(), vec![1, 2]);
assert_eq!([1, 2, 3].into_iter().collect::<ThinVec<_>>().into_vec(), vec![1, 2, 3]);
}
#[test]
fn test_into_iterator_owned() {
assert_eq!(ThinVec::new().into_iter().collect::<Vec<String>>(), Vec::<String>::new());
assert_eq!(ThinVec::from(vec![1]).into_iter().collect::<Vec<_>>(), vec![1]);
assert_eq!(ThinVec::from(vec![1, 2]).into_iter().collect::<Vec<_>>(), vec![1, 2]);
assert_eq!(ThinVec::from(vec![1, 2, 3]).into_iter().collect::<Vec<_>>(), vec![1, 2, 3]);
}
#[test]
fn test_into_iterator_ref() {
assert_eq!(ThinVec::new().iter().collect::<Vec<&String>>(), Vec::<&String>::new());
assert_eq!(ThinVec::from(vec![1]).iter().collect::<Vec<_>>(), vec![&1]);
assert_eq!(ThinVec::from(vec![1, 2]).iter().collect::<Vec<_>>(), vec![&1, &2]);
assert_eq!(ThinVec::from(vec![1, 2, 3]).iter().collect::<Vec<_>>(), vec![&1, &2, &3]);
}
#[test]
fn test_into_iterator_ref_mut() {
assert_eq!(ThinVec::new().iter_mut().collect::<Vec<&mut String>>(), Vec::<&mut String>::new());
assert_eq!(ThinVec::from(vec![1]).iter_mut().collect::<Vec<_>>(), vec![&mut 1]);
assert_eq!(ThinVec::from(vec![1, 2]).iter_mut().collect::<Vec<_>>(), vec![&mut 1, &mut 2]);
assert_eq!(
ThinVec::from(vec![1, 2, 3]).iter_mut().collect::<Vec<_>>(),
vec![&mut 1, &mut 2, &mut 3],
);
}

45
compiler/rustc_middle/Cargo.toml
View File

@ -7,34 +7,35 @@ edition = "2021"
doctest = false
[dependencies]
rustc_arena = { path = "../rustc_arena" }
bitflags = "1.2.1"
chalk-ir = "0.80.0"
either = "1.5.0"
gsgdt = "0.1.2"
tracing = "0.1"
rustc-rayon = { version = "0.4.0", optional = true }
rustc-rayon-core = { version = "0.4.0", optional = true }
polonius-engine = "0.13.0"
rustc_apfloat = { path = "../rustc_apfloat" }
rustc_attr = { path = "../rustc_attr" }
rustc_feature = { path = "../rustc_feature" }
rustc_hir = { path = "../rustc_hir" }
rustc_target = { path = "../rustc_target" }
rustc_macros = { path = "../rustc_macros" }
rustc_data_structures = { path = "../rustc_data_structures" }
rustc_query_system = { path = "../rustc_query_system" }
rustc_errors = { path = "../rustc_errors" }
rustc_graphviz = { path = "../rustc_graphviz" }
rustc_index = { path = "../rustc_index" }
rustc_serialize = { path = "../rustc_serialize" }
rustc_ast = { path = "../rustc_ast" }
rustc_span = { path = "../rustc_span" }
chalk-ir = "0.80.0"
smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
rustc_session = { path = "../rustc_session" }
rustc_type_ir = { path = "../rustc_type_ir" }
rand = "0.8.4"
rand_xoshiro = "0.6.0"
rustc_apfloat = { path = "../rustc_apfloat" }
rustc_arena = { path = "../rustc_arena" }
rustc_ast = { path = "../rustc_ast" }
rustc_attr = { path = "../rustc_attr" }
rustc_data_structures = { path = "../rustc_data_structures" }
rustc_errors = { path = "../rustc_errors" }
rustc_feature = { path = "../rustc_feature" }
rustc_graphviz = { path = "../rustc_graphviz" }
rustc_hir = { path = "../rustc_hir" }
rustc_index = { path = "../rustc_index" }
rustc_macros = { path = "../rustc_macros" }
rustc_query_system = { path = "../rustc_query_system" }
rustc-rayon-core = { version = "0.4.0", optional = true }
rustc-rayon = { version = "0.4.0", optional = true }
rustc_serialize = { path = "../rustc_serialize" }
rustc_session = { path = "../rustc_session" }
rustc_span = { path = "../rustc_span" }
rustc_target = { path = "../rustc_target" }
rustc_type_ir = { path = "../rustc_type_ir" }
smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
thin-vec = "0.2.8"
tracing = "0.1"
[features]
rustc_use_parallel_compiler = ["rustc-rayon", "rustc-rayon-core"]

2
compiler/rustc_middle/src/ty/context.rs
View File

@ -1829,9 +1829,9 @@ pub mod tls {
use crate::dep_graph::TaskDepsRef;
use crate::ty::query;
use rustc_data_structures::sync::{self, Lock};
use rustc_data_structures::thin_vec::ThinVec;
use rustc_errors::Diagnostic;
use std::mem;
use thin_vec::ThinVec;
#[cfg(not(parallel_compiler))]
use std::cell::Cell;

2
compiler/rustc_parse/src/parser/attr_wrapper.rs
View File

@ -355,7 +355,7 @@ impl<'a> Parser<'a> {
&& matches!(self.capture_state.capturing, Capturing::Yes)
&& has_cfg_or_cfg_attr(final_attrs)
{
let attr_data = AttributesData { attrs: final_attrs.to_vec().into(), tokens };
let attr_data = AttributesData { attrs: final_attrs.iter().cloned().collect(), tokens };
// Replace the entire AST node that we just parsed, including attributes,
// with a `FlatToken::AttrTarget`. If this AST node is inside an item

3
compiler/rustc_query_impl/Cargo.toml
View File

@ -8,7 +8,6 @@ doctest = false
[dependencies]
measureme = "10.0.0"
rustc-rayon-core = { version = "0.4.0", optional = true }
rustc_ast = { path = "../rustc_ast" }
rustc_data_structures = { path = "../rustc_data_structures" }
rustc_errors = { path = "../rustc_errors" }
@ -17,10 +16,12 @@ rustc_index = { path = "../rustc_index" }
rustc_macros = { path = "../rustc_macros" }
rustc_middle = { path = "../rustc_middle" }
rustc_query_system = { path = "../rustc_query_system" }
rustc-rayon-core = { version = "0.4.0", optional = true }
rustc_serialize = { path = "../rustc_serialize" }
rustc_session = { path = "../rustc_session" }
rustc_span = { path = "../rustc_span" }
rustc_target = { path = "../rustc_target" }
thin-vec = "0.2.8"
tracing = "0.1"
[features]

10
compiler/rustc_query_impl/src/plumbing.rs
View File

@ -4,6 +4,9 @@
use crate::keys::Key;
use crate::{on_disk_cache, Queries};
use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
use rustc_data_structures::sync::Lock;
use rustc_errors::{Diagnostic, Handler};
use rustc_middle::dep_graph::{self, DepKind, DepNodeIndex, SerializedDepNodeIndex};
use rustc_middle::ty::tls::{self, ImplicitCtxt};
use rustc_middle::ty::{self, TyCtxt};
@ -12,14 +15,9 @@ use rustc_query_system::ich::StableHashingContext;
use rustc_query_system::query::{
QueryContext, QueryJobId, QueryMap, QuerySideEffects, QueryStackFrame,
};
use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
use rustc_data_structures::sync::Lock;
use rustc_data_structures::thin_vec::ThinVec;
use rustc_errors::{Diagnostic, Handler};
use std::any::Any;
use std::num::NonZeroU64;
use thin_vec::ThinVec;
#[derive(Copy, Clone)]
pub struct QueryCtxt<'tcx> {

7
compiler/rustc_query_system/Cargo.toml
View File

@ -7,9 +7,8 @@ edition = "2021"
doctest = false
[dependencies]
parking_lot = "0.11"
rustc_arena = { path = "../rustc_arena" }
tracing = "0.1"
rustc-rayon-core = { version = "0.4.0", optional = true }
rustc_ast = { path = "../rustc_ast" }
rustc_data_structures = { path = "../rustc_data_structures" }
rustc_errors = { path = "../rustc_errors" }
@ -17,12 +16,14 @@ rustc_feature = { path = "../rustc_feature" }
rustc_hir = { path = "../rustc_hir" }
rustc_index = { path = "../rustc_index" }
rustc_macros = { path = "../rustc_macros" }
rustc-rayon-core = { version = "0.4.0", optional = true }
rustc_serialize = { path = "../rustc_serialize" }
rustc_session = { path = "../rustc_session" }
rustc_span = { path = "../rustc_span" }
rustc_target = { path = "../rustc_target" }
parking_lot = "0.11"
smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
thin-vec = "0.2.8"
tracing = "0.1"
[features]
rustc_use_parallel_compiler = ["rustc-rayon-core"]

3
compiler/rustc_query_system/src/query/mod.rs
View File

@ -15,12 +15,11 @@ mod config;
pub use self::config::{QueryConfig, QueryDescription, QueryVTable};
use crate::dep_graph::{DepContext, DepNodeIndex, HasDepContext, SerializedDepNodeIndex};
use rustc_data_structures::sync::Lock;
use rustc_data_structures::thin_vec::ThinVec;
use rustc_errors::Diagnostic;
use rustc_hir::def::DefKind;
use rustc_span::Span;
use thin_vec::ThinVec;
/// Description of a frame in the query stack.
///

2
compiler/rustc_query_system/src/query/plumbing.rs
View File

@ -14,7 +14,6 @@ use rustc_data_structures::profiling::TimingGuard;
#[cfg(parallel_compiler)]
use rustc_data_structures::sharded::Sharded;
use rustc_data_structures::sync::Lock;
use rustc_data_structures::thin_vec::ThinVec;
use rustc_errors::{DiagnosticBuilder, ErrorGuaranteed, FatalError};
use rustc_session::Session;
use rustc_span::{Span, DUMMY_SP};
@ -24,6 +23,7 @@ use std::fmt::Debug;
use std::hash::Hash;
use std::mem;
use std::ptr;
use thin_vec::ThinVec;
pub struct QueryState<K> {
#[cfg(parallel_compiler)]

1
compiler/rustc_serialize/Cargo.toml
View File

@ -6,6 +6,7 @@ edition = "2021"
[dependencies]
indexmap = "1.9.1"
smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
thin-vec = "0.2.8"
[dev-dependencies]
rustc_macros = { path = "../rustc_macros" }

20
compiler/rustc_serialize/src/collection_impls.rs
View File

@ -1,13 +1,12 @@
//! Implementations of serialization for structures found in liballoc
use std::hash::{BuildHasher, Hash};
use crate::{Decodable, Decoder, Encodable, Encoder};
use smallvec::{Array, SmallVec};
use std::collections::{BTreeMap, BTreeSet, HashMap, HashSet, LinkedList, VecDeque};
use std::hash::{BuildHasher, Hash};
use std::rc::Rc;
use std::sync::Arc;
use smallvec::{Array, SmallVec};
use thin_vec::ThinVec;
impl<S: Encoder, A: Array<Item: Encodable<S>>> Encodable<S> for SmallVec<A> {
fn encode(&self, s: &mut S) {
@ -23,6 +22,19 @@ impl<D: Decoder, A: Array<Item: Decodable<D>>> Decodable<D> for SmallVec<A> {
}
}
impl<S: Encoder, T: Encodable<S>> Encodable<S> for ThinVec<T> {
fn encode(&self, s: &mut S) {
self.as_slice().encode(s);
}
}
impl<D: Decoder, T: Decodable<D>> Decodable<D> for ThinVec<T> {
fn decode(d: &mut D) -> ThinVec<T> {
let len = d.read_usize();
(0..len).map(|_| Decodable::decode(d)).collect()
}
}
impl<S: Encoder, T: Encodable<S>> Encodable<S> for LinkedList<T> {
fn encode(&self, s: &mut S) {
s.emit_usize(self.len());

15
src/librustdoc/Cargo.toml
View File

@ -10,18 +10,19 @@ path = "lib.rs"
arrayvec = { version = "0.7", default-features = false }
askama = { version = "0.11", default-features = false, features = ["config"] }
atty = "0.2"
pulldown-cmark = { version = "0.9.2", default-features = false }
minifier = "0.2.2"
serde = { version = "1.0", features = ["derive"] }
serde_json = "1.0"
smallvec = "1.8.1"
tempfile = "3"
itertools = "0.10.1"
minifier = "0.2.2"
once_cell = "1.10.0"
pulldown-cmark = { version = "0.9.2", default-features = false }
regex = "1"
rustdoc-json-types = { path = "../rustdoc-json-types" }
serde_json = "1.0"
serde = { version = "1.0", features = ["derive"] }
smallvec = "1.8.1"
tempfile = "3"
thin-vec = "0.2.8"
tracing = "0.1"
tracing-tree = "0.2.0"
once_cell = "1.10.0"
[dependencies.tracing-subscriber]
version = "0.3.3"

2
src/librustdoc/clean/auto_trait.rs
View File

@ -123,7 +123,7 @@ where
kind: Box::new(ImplItem(Box::new(Impl {
unsafety: hir::Unsafety::Normal,
generics: new_generics,
trait_: Some(clean_trait_ref_with_bindings(self.cx, trait_ref, &[])),
trait_: Some(clean_trait_ref_with_bindings(self.cx, trait_ref, ThinVec::new())),
for_: clean_middle_ty(ty, self.cx, None),
items: Vec::new(),
polarity,

2
src/librustdoc/clean/blanket_impl.rs
View File

@ -115,7 +115,7 @@ impl<'a, 'tcx> BlanketImplFinder<'a, 'tcx> {
),
// FIXME(eddyb) compute both `trait_` and `for_` from
// the post-inference `trait_ref`, as it's more accurate.
trait_: Some(clean_trait_ref_with_bindings(cx, trait_ref.0, &[])),
trait_: Some(clean_trait_ref_with_bindings(cx, trait_ref.0, ThinVec::new())),
for_: clean_middle_ty(ty.0, cx, None),
items: cx.tcx
.associated_items(impl_def_id)

5
src/librustdoc/clean/inline.rs
View File

@ -3,9 +3,10 @@
use std::iter::once;
use std::sync::Arc;
use thin_vec::ThinVec;
use rustc_ast as ast;
use rustc_data_structures::fx::FxHashSet;
use rustc_data_structures::thin_vec::ThinVec;
use rustc_hir as hir;
use rustc_hir::def::{DefKind, Res};
use rustc_hir::def_id::DefId;
@ -461,7 +462,7 @@ pub(crate) fn build_impl(
),
};
let polarity = tcx.impl_polarity(did);
let trait_ = associated_trait.map(|t| clean_trait_ref_with_bindings(cx, t, &[]));
let trait_ = associated_trait.map(|t| clean_trait_ref_with_bindings(cx, t, ThinVec::new()));
if trait_.as_ref().map(|t| t.def_id()) == tcx.lang_items().deref_trait() {
super::build_deref_target_impls(cx, &trait_items, ret);
}

33
src/librustdoc/clean/mod.rs
View File

@ -33,7 +33,8 @@ use std::collections::hash_map::Entry;
use std::collections::BTreeMap;
use std::default::Default;
use std::hash::Hash;
use std::{mem, vec};
use std::mem;
use thin_vec::ThinVec;
use crate::core::{self, DocContext, ImplTraitParam};
use crate::formats::item_type::ItemType;
@ -125,7 +126,7 @@ fn clean_generic_bound<'tcx>(
bug!("clean: parenthesized `GenericBound::LangItemTrait`");
};
let trait_ = clean_trait_ref_with_bindings(cx, trait_ref, &bindings);
let trait_ = clean_trait_ref_with_bindings(cx, trait_ref, bindings);
GenericBound::TraitBound(
PolyTrait { trait_, generic_params: vec![] },
hir::TraitBoundModifier::None,
@ -147,14 +148,14 @@ fn clean_generic_bound<'tcx>(
pub(crate) fn clean_trait_ref_with_bindings<'tcx>(
cx: &mut DocContext<'tcx>,
trait_ref: ty::TraitRef<'tcx>,
bindings: &[TypeBinding],
bindings: ThinVec<TypeBinding>,
) -> Path {
let kind = cx.tcx.def_kind(trait_ref.def_id).into();
if !matches!(kind, ItemType::Trait | ItemType::TraitAlias) {
span_bug!(cx.tcx.def_span(trait_ref.def_id), "`TraitRef` had unexpected kind {:?}", kind);
}
inline::record_extern_fqn(cx, trait_ref.def_id, kind);
let path = external_path(cx, trait_ref.def_id, true, bindings.to_vec(), trait_ref.substs);
let path = external_path(cx, trait_ref.def_id, true, bindings, trait_ref.substs);
debug!("ty::TraitRef\n subst: {:?}\n", trait_ref.substs);
@ -164,7 +165,7 @@ pub(crate) fn clean_trait_ref_with_bindings<'tcx>(
fn clean_poly_trait_ref_with_bindings<'tcx>(
cx: &mut DocContext<'tcx>,
poly_trait_ref: ty::PolyTraitRef<'tcx>,
bindings: &[TypeBinding],
bindings: ThinVec<TypeBinding>,
) -> GenericBound {
let poly_trait_ref = poly_trait_ref.lift_to_tcx(cx.tcx).unwrap();
@ -327,7 +328,7 @@ fn clean_poly_trait_predicate<'tcx>(
let poly_trait_ref = pred.map_bound(|pred| pred.trait_ref);
Some(WherePredicate::BoundPredicate {
ty: clean_middle_ty(poly_trait_ref.skip_binder().self_ty(), cx, None),
bounds: vec![clean_poly_trait_ref_with_bindings(cx, poly_trait_ref, &[])],
bounds: vec![clean_poly_trait_ref_with_bindings(cx, poly_trait_ref, ThinVec::new())],
bound_params: Vec::new(),
})
}
@ -402,7 +403,7 @@ fn clean_projection<'tcx>(
def_id: Option<DefId>,
) -> Type {
let lifted = ty.lift_to_tcx(cx.tcx).unwrap();
let trait_ = clean_trait_ref_with_bindings(cx, lifted.trait_ref(cx.tcx), &[]);
let trait_ = clean_trait_ref_with_bindings(cx, lifted.trait_ref(cx.tcx), ThinVec::new());
let self_type = clean_middle_ty(ty.self_ty(), cx, None);
let self_def_id = if let Some(def_id) = def_id {
cx.tcx.opt_parent(def_id).or(Some(def_id))
@ -1588,12 +1589,12 @@ pub(crate) fn clean_middle_ty<'tcx>(
AdtKind::Enum => ItemType::Enum,
};
inline::record_extern_fqn(cx, did, kind);
let path = external_path(cx, did, false, vec![], substs);
let path = external_path(cx, did, false, ThinVec::new(), substs);
Type::Path { path }
}
ty::Foreign(did) => {
inline::record_extern_fqn(cx, did, ItemType::ForeignType);
let path = external_path(cx, did, false, vec![], InternalSubsts::empty());
let path = external_path(cx, did, false, ThinVec::new(), InternalSubsts::empty());
Type::Path { path }
}
ty::Dynamic(obj, ref reg) => {
@ -1617,7 +1618,7 @@ pub(crate) fn clean_middle_ty<'tcx>(
let mut bounds = dids
.map(|did| {
let empty = cx.tcx.intern_substs(&[]);
let path = external_path(cx, did, false, vec![], empty);
let path = external_path(cx, did, false, ThinVec::new(), empty);
inline::record_extern_fqn(cx, did, ItemType::Trait);
PolyTrait { trait_: path, generic_params: Vec::new() }
})
@ -1693,7 +1694,7 @@ pub(crate) fn clean_middle_ty<'tcx>(
}
}
let bindings: Vec<_> = bounds
let bindings: ThinVec<_> = bounds
.iter()
.filter_map(|bound| {
if let ty::PredicateKind::Projection(proj) = bound.kind().skip_binder()
@ -1714,7 +1715,7 @@ pub(crate) fn clean_middle_ty<'tcx>(
})
.collect();
Some(clean_poly_trait_ref_with_bindings(cx, trait_ref, &bindings))
Some(clean_poly_trait_ref_with_bindings(cx, trait_ref, bindings))
})
.collect::<Vec<_>>();
bounds.extend(regions);
@ -1845,12 +1846,8 @@ fn clean_generic_args<'tcx>(
})
.collect::<Vec<_>>()
.into();
let bindings = generic_args
.bindings
.iter()
.map(|x| clean_type_binding(x, cx))
.collect::<Vec<_>>()
.into();
let bindings =
generic_args.bindings.iter().map(|x| clean_type_binding(x, cx)).collect::<ThinVec<_>>();
GenericArgs::AngleBracketed { args, bindings }
}
}

4
src/librustdoc/clean/types.rs
View File

@ -8,6 +8,7 @@ use std::sync::OnceLock as OnceCell;
use std::{cmp, fmt, iter};
use arrayvec::ArrayVec;
use thin_vec::ThinVec;
use rustc_ast::attr;
use rustc_ast::util::comments::beautify_doc_string;
@ -15,7 +16,6 @@ use rustc_ast::{self as ast, AttrStyle};
use rustc_attr::{ConstStability, Deprecation, Stability, StabilityLevel};
use rustc_const_eval::const_eval::is_unstable_const_fn;
use rustc_data_structures::fx::{FxHashMap, FxHashSet};
use rustc_data_structures::thin_vec::ThinVec;
use rustc_hir as hir;
use rustc_hir::def::{CtorKind, DefKind, Res};
use rustc_hir::def_id::{CrateNum, DefId, LOCAL_CRATE};
@ -1303,7 +1303,7 @@ impl GenericBound {
pub(crate) fn maybe_sized(cx: &mut DocContext<'_>) -> GenericBound {
let did = cx.tcx.require_lang_item(LangItem::Sized, None);
let empty = cx.tcx.intern_substs(&[]);
let path = external_path(cx, did, false, vec![], empty);
let path = external_path(cx, did, false, ThinVec::new(), empty);
inline::record_extern_fqn(cx, did, ItemType::Trait);
GenericBound::TraitBound(
PolyTrait { trait_: path, generic_params: Vec::new() },

8
src/librustdoc/clean/utils.rs
View File

@ -12,7 +12,6 @@ use crate::visit_lib::LibEmbargoVisitor;
use rustc_ast as ast;
use rustc_ast::tokenstream::TokenTree;
use rustc_data_structures::thin_vec::ThinVec;
use rustc_hir as hir;
use rustc_hir::def::{DefKind, Res};
use rustc_hir::def_id::{DefId, LOCAL_CRATE};
@ -23,6 +22,7 @@ use rustc_middle::ty::{self, DefIdTree, TyCtxt};
use rustc_span::symbol::{kw, sym, Symbol};
use std::fmt::Write as _;
use std::mem;
use thin_vec::ThinVec;
#[cfg(test)]
mod tests;
@ -102,7 +102,7 @@ fn external_generic_args<'tcx>(
cx: &mut DocContext<'tcx>,
did: DefId,
has_self: bool,
bindings: Vec<TypeBinding>,
bindings: ThinVec<TypeBinding>,
substs: SubstsRef<'tcx>,
) -> GenericArgs {
let args = substs_to_args(cx, substs, has_self);
@ -112,7 +112,7 @@ fn external_generic_args<'tcx>(
// The trait's first substitution is the one after self, if there is one.
match substs.iter().nth(if has_self { 1 } else { 0 }).unwrap().expect_ty().kind() {
ty::Tuple(tys) => tys.iter().map(|t| clean_middle_ty(t, cx, None)).collect::<Vec<_>>().into(),
_ => return GenericArgs::AngleBracketed { args: args.into(), bindings: bindings.into() },
_ => return GenericArgs::AngleBracketed { args: args.into(), bindings },
};
let output = None;
// FIXME(#20299) return type comes from a projection now
@ -130,7 +130,7 @@ pub(super) fn external_path<'tcx>(
cx: &mut DocContext<'tcx>,
did: DefId,
has_self: bool,
bindings: Vec<TypeBinding>,
bindings: ThinVec<TypeBinding>,
substs: SubstsRef<'tcx>,
) -> Path {
let def_kind = cx.tcx.def_kind(did);

1
src/tools/tidy/src/deps.rs
View File

@ -223,6 +223,7 @@ const PERMITTED_DEPENDENCIES: &[&str] = &[
"time",
"tinystr",
"tinyvec",
"thin-vec",
"tracing",
"tracing-attributes",
"tracing-core",