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Auto merge of #69226 - JohnTitor:rollup-syn03oj, r=JohnTitor

Browse Source 
Rollup of 6 pull requests

Successful merges:

 - #68495 (Updating str.chars docs to mention crates.io.)
 - #68701 (Improve #Safety of various methods in core::ptr)
 - #69158 (Don't print block exit state in dataflow graphviz if unchanged)
 - #69179 (Rename `FunctionRetTy` to `FnRetTy`)
 - #69186 ([tiny] parser: `macro_rules` is a weak keyword)
 - #69188 (Clean up E0309 explanation)

Failed merges:

r? @ghost
This commit is contained in:
bors 2020-02-17 06:44:35 +00:00
commit 75b98fbe77
50 changed files with 184 additions and 157 deletions
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19
src/libcore/ptr/mod.rs
View File

@ -119,10 +119,13 @@ mod mut_ptr;
///
/// Behavior is undefined if any of the following conditions are violated:
///
/// * `to_drop` must be [valid] for reads.
/// * `to_drop` must be [valid] for both reads and writes.
///
/// * `to_drop` must be properly aligned.
///
/// * The value `to_drop` points to must be valid for dropping, which may mean it must uphold
/// additional invariants - this is type-dependent.
///
/// Additionally, if `T` is not [`Copy`], using the pointed-to value after
/// calling `drop_in_place` can cause undefined behavior. Note that `*to_drop =
/// foo` counts as a use because it will cause the value to be dropped
@ -289,7 +292,7 @@ pub const fn slice_from_raw_parts_mut<T>(data: *mut T, len: usize) -> *mut [T] {
///
/// Behavior is undefined if any of the following conditions are violated:
///
/// * Both `x` and `y` must be [valid] for reads and writes.
/// * Both `x` and `y` must be [valid] for both reads and writes.
///
/// * Both `x` and `y` must be properly aligned.
///
@ -355,7 +358,7 @@ pub unsafe fn swap<T>(x: *mut T, y: *mut T) {
///
/// Behavior is undefined if any of the following conditions are violated:
///
/// * Both `x` and `y` must be [valid] for reads and writes of `count *
/// * Both `x` and `y` must be [valid] for both reads and writes of `count *
/// size_of::<T>()` bytes.
///
/// * Both `x` and `y` must be properly aligned.
@ -471,10 +474,12 @@ unsafe fn swap_nonoverlapping_bytes(x: *mut u8, y: *mut u8, len: usize) {
///
/// Behavior is undefined if any of the following conditions are violated:
///
/// * `dst` must be [valid] for writes.
/// * `dst` must be [valid] for both reads and writes.
///
/// * `dst` must be properly aligned.
///
/// * `dst` must point to a properly initialized value of type `T`.
///
/// Note that even if `T` has size `0`, the pointer must be non-NULL and properly aligned.
///
/// [valid]: ../ptr/index.html#safety
@ -514,6 +519,8 @@ pub unsafe fn replace<T>(dst: *mut T, mut src: T) -> T {
/// * `src` must be properly aligned. Use [`read_unaligned`] if this is not the
/// case.
///
/// * `src` must point to a properly initialized value of type `T`.
///
/// Note that even if `T` has size `0`, the pointer must be non-NULL and properly aligned.
///
/// # Examples
@ -628,6 +635,8 @@ pub unsafe fn read<T>(src: *const T) -> T {
///
/// * `src` must be [valid] for reads.
///
/// * `src` must point to a properly initialized value of type `T`.
///
/// Like [`read`], `read_unaligned` creates a bitwise copy of `T`, regardless of
/// whether `T` is [`Copy`]. If `T` is not [`Copy`], using both the returned
/// value and the value at `*src` can [violate memory safety][read-ownership].
@ -922,6 +931,8 @@ pub unsafe fn write_unaligned<T>(dst: *mut T, src: T) {
///
/// * `src` must be properly aligned.
///
/// * `src` must point to a properly initialized value of type `T`.
///
/// Like [`read`], `read_volatile` creates a bitwise copy of `T`, regardless of
/// whether `T` is [`Copy`]. If `T` is not [`Copy`], using both the returned
/// value and the value at `*src` can [violate memory safety][read-ownership].

3
src/libcore/str/mod.rs
View File

@ -2658,7 +2658,8 @@ impl str {
///
/// It's important to remember that [`char`] represents a Unicode Scalar
/// Value, and may not match your idea of what a 'character' is. Iteration
/// over grapheme clusters may be what you actually want.
/// over grapheme clusters may be what you actually want. This functionality
/// is not provided by Rust's standard library, check crates.io instead.
///
/// # Examples
///

8
src/librustc_ast_lowering/expr.rs
View File

@ -480,8 +480,8 @@ impl<'hir> LoweringContext<'_, 'hir> {
body: impl FnOnce(&mut Self) -> hir::Expr<'hir>,
) -> hir::ExprKind<'hir> {
let output = match ret_ty {
Some(ty) => FunctionRetTy::Ty(ty),
None => FunctionRetTy::Default(span),
Some(ty) => FnRetTy::Ty(ty),
None => FnRetTy::Default(span),
};
let ast_decl = FnDecl { inputs: vec![], output };
let decl = self.lower_fn_decl(&ast_decl, None, /* impl trait allowed */ false, None);
@ -721,7 +721,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
fn_decl_span: Span,
) -> hir::ExprKind<'hir> {
let outer_decl =
FnDecl { inputs: decl.inputs.clone(), output: FunctionRetTy::Default(fn_decl_span) };
FnDecl { inputs: decl.inputs.clone(), output: FnRetTy::Default(fn_decl_span) };
// We need to lower the declaration outside the new scope, because we
// have to conserve the state of being inside a loop condition for the
// closure argument types.
@ -747,7 +747,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
// `|x: u8| future_from_generator(|| -> X { ... })`.
let body_id = this.lower_fn_body(&outer_decl, |this| {
let async_ret_ty =
if let FunctionRetTy::Ty(ty) = &decl.output { Some(ty.clone()) } else { None };
if let FnRetTy::Ty(ty) = &decl.output { Some(ty.clone()) } else { None };
let async_body = this.make_async_expr(
capture_clause,
closure_id,

18
src/librustc_ast_lowering/lib.rs
View File

@ -1725,16 +1725,16 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
)
} else {
match decl.output {
FunctionRetTy::Ty(ref ty) => {
FnRetTy::Ty(ref ty) => {
let context = match in_band_ty_params {
Some((def_id, _)) if impl_trait_return_allow => {
ImplTraitContext::OpaqueTy(Some(def_id), hir::OpaqueTyOrigin::FnReturn)
}
_ => ImplTraitContext::disallowed(),
};
hir::FunctionRetTy::Return(self.lower_ty(ty, context))
hir::FnRetTy::Return(self.lower_ty(ty, context))
}
FunctionRetTy::Default(span) => hir::FunctionRetTy::DefaultReturn(span),
FnRetTy::Default(span) => hir::FnRetTy::DefaultReturn(span),
}
};
@ -1781,10 +1781,10 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
// `elided_lt_replacement`: replacement for elided lifetimes in the return type
fn lower_async_fn_ret_ty(
&mut self,
output: &FunctionRetTy,
output: &FnRetTy,
fn_def_id: DefId,
opaque_ty_node_id: NodeId,
) -> hir::FunctionRetTy<'hir> {
) -> hir::FnRetTy<'hir> {
debug!(
"lower_async_fn_ret_ty(\
output={:?}, \
@ -1949,19 +1949,19 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
// only the lifetime parameters that we must supply.
let opaque_ty_ref = hir::TyKind::Def(hir::ItemId { id: opaque_ty_id }, generic_args);
let opaque_ty = self.ty(opaque_ty_span, opaque_ty_ref);
hir::FunctionRetTy::Return(self.arena.alloc(opaque_ty))
hir::FnRetTy::Return(self.arena.alloc(opaque_ty))
}
/// Transforms `-> T` into `Future<Output = T>`
fn lower_async_fn_output_type_to_future_bound(
&mut self,
output: &FunctionRetTy,
output: &FnRetTy,
fn_def_id: DefId,
span: Span,
) -> hir::GenericBound<'hir> {
// Compute the `T` in `Future<Output = T>` from the return type.
let output_ty = match output {
FunctionRetTy::Ty(ty) => {
FnRetTy::Ty(ty) => {
// Not `OpaqueTyOrigin::AsyncFn`: that's only used for the
// `impl Future` opaque type that `async fn` implicitly
// generates.
@ -1969,7 +1969,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
ImplTraitContext::OpaqueTy(Some(fn_def_id), hir::OpaqueTyOrigin::FnReturn);
self.lower_ty(ty, context)
}
FunctionRetTy::Default(ret_ty_span) => self.arena.alloc(self.ty_tup(*ret_ty_span, &[])),
FnRetTy::Default(ret_ty_span) => self.arena.alloc(self.ty_tup(*ret_ty_span, &[])),
};
// "<Output = T>"

4
src/librustc_ast_lowering/path.rs
View File

@ -397,8 +397,8 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
inputs.iter().map(|ty| this.lower_ty_direct(ty, ImplTraitContext::disallowed())),
);
let output_ty = match output {
FunctionRetTy::Ty(ty) => this.lower_ty(&ty, ImplTraitContext::disallowed()),
FunctionRetTy::Default(_) => this.arena.alloc(this.ty_tup(span, &[])),
FnRetTy::Ty(ty) => this.lower_ty(&ty, ImplTraitContext::disallowed()),
FnRetTy::Default(_) => this.arena.alloc(this.ty_tup(span, &[])),
};
let args = smallvec![GenericArg::Type(this.ty_tup(span, inputs))];
let binding = this.output_ty_binding(output_ty.span, output_ty);

2
src/librustc_ast_passes/ast_validation.rs
View File

@ -954,7 +954,7 @@ impl<'a> Visitor<'a> for AstValidator<'a> {
}
GenericArgs::Parenthesized(ref data) => {
walk_list!(self, visit_ty, &data.inputs);
if let FunctionRetTy::Ty(ty) = &data.output {
if let FnRetTy::Ty(ty) = &data.output {
// `-> Foo` syntax is essentially an associated type binding,
// so it is also allowed to contain nested `impl Trait`.
self.with_impl_trait(None, |this| this.visit_ty(ty));

4
src/librustc_ast_passes/feature_gate.rs
View File

@ -419,8 +419,8 @@ impl<'a> Visitor<'a> for PostExpansionVisitor<'a> {
visit::walk_ty(self, ty)
}
fn visit_fn_ret_ty(&mut self, ret_ty: &'a ast::FunctionRetTy) {
if let ast::FunctionRetTy::Ty(ref output_ty) = *ret_ty {
fn visit_fn_ret_ty(&mut self, ret_ty: &'a ast::FnRetTy) {
if let ast::FnRetTy::Ty(ref output_ty) = *ret_ty {
if let ast::TyKind::Never = output_ty.kind {
// Do nothing.
} else {

4
src/librustc_ast_pretty/pprust.rs
View File

@ -2673,8 +2673,8 @@ impl<'a> State<'a> {
self.end();
}
crate fn print_fn_ret_ty(&mut self, fn_ret_ty: &ast::FunctionRetTy) {
if let ast::FunctionRetTy::Ty(ty) = fn_ret_ty {
crate fn print_fn_ret_ty(&mut self, fn_ret_ty: &ast::FnRetTy) {
if let ast::FnRetTy::Ty(ty) = fn_ret_ty {
self.space_if_not_bol();
self.ibox(INDENT_UNIT);
self.word_space("->");

6
src/librustc_ast_pretty/pprust/tests.rs
View File

@ -34,10 +34,8 @@ fn test_fun_to_string() {
with_default_globals(|| {
let abba_ident = ast::Ident::from_str("abba");
let decl = ast::FnDecl {
inputs: Vec::new(),
output: ast::FunctionRetTy::Default(rustc_span::DUMMY_SP),
};
let decl =
ast::FnDecl { inputs: Vec::new(), output: ast::FnRetTy::Default(rustc_span::DUMMY_SP) };
let generics = ast::Generics::default();
assert_eq!(
fun_to_string(&decl, ast::FnHeader::default(), abba_ident, &generics),

2
src/librustc_builtin_macros/deriving/generic/mod.rs
View File

@ -957,7 +957,7 @@ impl<'a> MethodDef<'a> {
let ret_type = self.get_ret_ty(cx, trait_, generics, type_ident);
let method_ident = cx.ident_of(self.name, trait_.span);
let fn_decl = cx.fn_decl(args, ast::FunctionRetTy::Ty(ret_type));
let fn_decl = cx.fn_decl(args, ast::FnRetTy::Ty(ret_type));
let body_block = cx.block_expr(body);
let unsafety = if self.is_unsafe { ast::Unsafe::Yes(trait_.span) } else { ast::Unsafe::No };

2
src/librustc_builtin_macros/global_allocator.rs
View File

@ -63,7 +63,7 @@ impl AllocFnFactory<'_, '_> {
let args = method.inputs.iter().map(|ty| self.arg_ty(ty, &mut abi_args, mk)).collect();
let result = self.call_allocator(method.name, args);
let (output_ty, output_expr) = self.ret_ty(&method.output, result);
let decl = self.cx.fn_decl(abi_args, ast::FunctionRetTy::Ty(output_ty));
let decl = self.cx.fn_decl(abi_args, ast::FnRetTy::Ty(output_ty));
let header = FnHeader { unsafety: Unsafe::Yes(self.span), ..FnHeader::default() };
let sig = FnSig { decl, header };
let kind = ItemKind::Fn(sig, Generics::default(), Some(self.cx.block_expr(output_expr)));

4
src/librustc_builtin_macros/test.rs
View File

@ -391,8 +391,8 @@ fn has_test_signature(cx: &ExtCtxt<'_>, i: &ast::Item) -> bool {
// If the termination trait is active, the compiler will check that the output
// type implements the `Termination` trait as `libtest` enforces that.
let has_output = match sig.decl.output {
ast::FunctionRetTy::Default(..) => false,
ast::FunctionRetTy::Ty(ref t) if t.kind.is_unit() => false,
ast::FnRetTy::Default(..) => false,
ast::FnRetTy::Ty(ref t) if t.kind.is_unit() => false,
_ => true,
};

2
src/librustc_builtin_macros/test_harness.rs
View File

@ -305,7 +305,7 @@ fn mk_main(cx: &mut TestCtxt<'_>) -> P<ast::Item> {
ecx.block(sp, vec![call_test_main])
};
let decl = ecx.fn_decl(vec![], ast::FunctionRetTy::Ty(main_ret_ty));
let decl = ecx.fn_decl(vec![], ast::FnRetTy::Ty(main_ret_ty));
let sig = ast::FnSig { decl, header: ast::FnHeader::default() };
let main = ast::ItemKind::Fn(sig, ast::Generics::default(), Some(main_body));

22
src/librustc_error_codes/error_codes/E0309.md
View File

@ -1,9 +1,7 @@
The type definition contains some field whose type
requires an outlives annotation. Outlives annotations
(e.g., `T: 'a`) are used to guarantee that all the data in T is valid
for at least the lifetime `'a`. This scenario most commonly
arises when the type contains an associated type reference
like `<T as SomeTrait<'a>>::Output`, as shown in this example:
A parameter type is missing an explicit lifetime bound and may not live long
enough.
Erroneous code example:
```compile_fail,E0309
// This won't compile because the applicable impl of
@ -25,9 +23,15 @@ where
}
```
Here, the where clause `T: 'a` that appears on the impl is not known to be
satisfied on the struct. To make this example compile, you have to add
a where-clause like `T: 'a` to the struct definition:
The type definition contains some field whose type requires an outlives
annotation. Outlives annotations (e.g., `T: 'a`) are used to guarantee that all
the data in T is valid for at least the lifetime `'a`. This scenario most
commonly arises when the type contains an associated type reference like
`<T as SomeTrait<'a>>::Output`, as shown in the previous code.
There, the where clause `T: 'a` that appears on the impl is not known to be
satisfied on the struct. To make this example compile, you have to add a
where-clause like `T: 'a` to the struct definition:
```
struct Foo<'a, T>

4
src/librustc_expand/build.rs
View File

@ -519,7 +519,7 @@ impl<'a> ExtCtxt<'a> {
pub fn lambda(&self, span: Span, ids: Vec<ast::Ident>, body: P<ast::Expr>) -> P<ast::Expr> {
let fn_decl = self.fn_decl(
ids.iter().map(|id| self.param(span, *id, self.ty(span, ast::TyKind::Infer))).collect(),
ast::FunctionRetTy::Default(span),
ast::FnRetTy::Default(span),
);
// FIXME -- We are using `span` as the span of the `|...|`
@ -569,7 +569,7 @@ impl<'a> ExtCtxt<'a> {
}
// FIXME: unused `self`
pub fn fn_decl(&self, inputs: Vec<ast::Param>, output: ast::FunctionRetTy) -> P<ast::FnDecl> {
pub fn fn_decl(&self, inputs: Vec<ast::Param>, output: ast::FnRetTy) -> P<ast::FnDecl> {
P(ast::FnDecl { inputs, output })
}

4
src/librustc_expand/mbe/macro_check.rs
View File

@ -109,7 +109,7 @@ use crate::mbe::{KleeneToken, TokenTree};
use rustc_data_structures::fx::FxHashMap;
use rustc_session::lint::builtin::META_VARIABLE_MISUSE;
use rustc_session::parse::ParseSess;
use rustc_span::symbol::{kw, sym};
use rustc_span::symbol::kw;
use rustc_span::{symbol::Ident, MultiSpan, Span};
use syntax::ast::NodeId;
use syntax::token::{DelimToken, Token, TokenKind};
@ -392,7 +392,7 @@ fn check_nested_occurrences(
NestedMacroState::Empty,
&TokenTree::Token(Token { kind: TokenKind::Ident(name, false), .. }),
) => {
if name == sym::macro_rules {
if name == kw::MacroRules {
state = NestedMacroState::MacroRules;
} else if name == kw::Macro {
state = NestedMacroState::Macro;

2
src/librustc_expand/parse/tests.rs
View File

@ -65,7 +65,7 @@ fn string_to_tts_macro() {
match tts {
[TokenTree::Token(Token { kind: token::Ident(name_macro_rules, false), .. }), TokenTree::Token(Token { kind: token::Not, .. }), TokenTree::Token(Token { kind: token::Ident(name_zip, false), .. }), TokenTree::Delimited(_, macro_delim, macro_tts)]
if name_macro_rules == &sym::macro_rules && name_zip.as_str() == "zip" =>
if name_macro_rules == &kw::MacroRules && name_zip.as_str() == "zip" =>
{
let tts = &macro_tts.trees().collect::<Vec<_>>();
match &tts[..] {

10
src/librustc_hir/hir.rs
View File

@ -5,7 +5,7 @@ use crate::itemlikevisit;
use crate::print;
crate use BlockCheckMode::*;
crate use FunctionRetTy::*;
crate use FnRetTy::*;
crate use UnsafeSource::*;
use rustc_data_structures::fx::FxHashSet;
@ -2082,7 +2082,7 @@ pub struct FnDecl<'hir> {
///
/// Additional argument data is stored in the function's [body](Body::parameters).
pub inputs: &'hir [Ty<'hir>],
pub output: FunctionRetTy<'hir>,
pub output: FnRetTy<'hir>,
pub c_variadic: bool,
/// Does the function have an implicit self?
pub implicit_self: ImplicitSelfKind,
@ -2148,7 +2148,7 @@ impl Defaultness {
}
#[derive(RustcEncodable, RustcDecodable, Debug, HashStable_Generic)]
pub enum FunctionRetTy<'hir> {
pub enum FnRetTy<'hir> {
/// Return type is not specified.
///
/// Functions default to `()` and
@ -2159,7 +2159,7 @@ pub enum FunctionRetTy<'hir> {
Return(&'hir Ty<'hir>),
}
impl fmt::Display for FunctionRetTy<'_> {
impl fmt::Display for FnRetTy<'_> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
Self::Return(ref ty) => print::to_string(print::NO_ANN, |s| s.print_type(ty)).fmt(f),
@ -2168,7 +2168,7 @@ impl fmt::Display for FunctionRetTy<'_> {
}
}
impl FunctionRetTy<'_> {
impl FnRetTy<'_> {
pub fn span(&self) -> Span {
match *self {
Self::DefaultReturn(span) => span,

4
src/librustc_hir/intravisit.rs
View File

@ -865,8 +865,8 @@ pub fn walk_where_predicate<'v, V: Visitor<'v>>(
}
}
pub fn walk_fn_ret_ty<'v, V: Visitor<'v>>(visitor: &mut V, ret_ty: &'v FunctionRetTy<'v>) {
if let FunctionRetTy::Return(ref output_ty) = *ret_ty {
pub fn walk_fn_ret_ty<'v, V: Visitor<'v>>(visitor: &mut V, ret_ty: &'v FnRetTy<'v>) {
if let FnRetTy::Return(ref output_ty) = *ret_ty {
visitor.visit_ty(output_ty)
}
}

6
src/librustc_infer/infer/error_reporting/need_type_info.rs
View File

@ -7,7 +7,7 @@ use rustc_errors::{struct_span_err, Applicability, DiagnosticBuilder};
use rustc_hir as hir;
use rustc_hir::def::{DefKind, Namespace};
use rustc_hir::intravisit::{self, NestedVisitorMap, Visitor};
use rustc_hir::{Body, Expr, ExprKind, FunctionRetTy, HirId, Local, Pat};
use rustc_hir::{Body, Expr, ExprKind, FnRetTy, HirId, Local, Pat};
use rustc_span::source_map::DesugaringKind;
use rustc_span::symbol::kw;
use rustc_span::Span;
@ -108,7 +108,7 @@ impl<'a, 'tcx> Visitor<'tcx> for FindLocalByTypeVisitor<'a, 'tcx> {
fn closure_return_type_suggestion(
span: Span,
err: &mut DiagnosticBuilder<'_>,
output: &FunctionRetTy<'_>,
output: &FnRetTy<'_>,
body: &Body<'_>,
descr: &str,
name: &str,
@ -117,7 +117,7 @@ fn closure_return_type_suggestion(
parent_descr: Option<&str>,
) {
let (arrow, post) = match output {
FunctionRetTy::DefaultReturn(_) => ("-> ", " "),
FnRetTy::DefaultReturn(_) => ("-> ", " "),
_ => ("", ""),
};
let suggestion = match body.value.kind {

4
src/librustc_infer/infer/error_reporting/nice_region_error/named_anon_conflict.rs
View File

@ -3,7 +3,7 @@
use crate::infer::error_reporting::nice_region_error::NiceRegionError;
use rustc::ty;
use rustc_errors::{struct_span_err, Applicability, DiagnosticBuilder};
use rustc_hir::{FunctionRetTy, TyKind};
use rustc_hir::{FnRetTy, TyKind};
impl<'a, 'tcx> NiceRegionError<'a, 'tcx> {
/// When given a `ConcreteFailure` for a function with parameters containing a named region and
@ -79,7 +79,7 @@ impl<'a, 'tcx> NiceRegionError<'a, 'tcx> {
{
return None;
}
if let FunctionRetTy::Return(ty) = &fndecl.output {
if let FnRetTy::Return(ty) = &fndecl.output {
if let (TyKind::Def(_, _), ty::ReStatic) = (&ty.kind, sub) {
// This is an impl Trait return that evaluates de need of 'static.
// We handle this case better in `static_impl_trait`.

2
src/librustc_infer/traits/error_reporting/suggestions.rs
View File

@ -594,7 +594,7 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
_ => return false,
};
let ret_ty = if let hir::FunctionRetTy::Return(ret_ty) = sig.decl.output {
let ret_ty = if let hir::FnRetTy::Return(ret_ty) = sig.decl.output {
ret_ty
} else {
return false;

4
src/librustc_interface/util.rs
View File

@ -620,8 +620,8 @@ impl<'a, 'b> ReplaceBodyWithLoop<'a, 'b> {
ret
}
fn should_ignore_fn(ret_ty: &ast::FunctionRetTy) -> bool {
if let ast::FunctionRetTy::Ty(ref ty) = ret_ty {
fn should_ignore_fn(ret_ty: &ast::FnRetTy) -> bool {
if let ast::FnRetTy::Ty(ref ty) = ret_ty {
fn involves_impl_trait(ty: &ast::Ty) -> bool {
match ty.kind {
ast::TyKind::ImplTrait(..) => true,

2
src/librustc_lint/types.rs
View File

@ -953,7 +953,7 @@ impl<'a, 'tcx> ImproperCTypesVisitor<'a, 'tcx> {
self.check_type_for_ffi_and_report_errors(input_hir.span, input_ty, false);
}
if let hir::FunctionRetTy::Return(ref ret_hir) = decl.output {
if let hir::FnRetTy::Return(ref ret_hir) = decl.output {
let ret_ty = sig.output();
if !ret_ty.is_unit() {
self.check_type_for_ffi_and_report_errors(ret_hir.span, ret_ty, false);

2
src/librustc_mir/borrow_check/diagnostics/conflict_errors.rs
View File

@ -1885,7 +1885,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
// as the HIR doesn't have full types for closure arguments.
let return_ty = *sig.output().skip_binder();
let mut return_span = fn_decl.output.span();
if let hir::FunctionRetTy::Return(ty) = &fn_decl.output {
if let hir::FnRetTy::Return(ty) = &fn_decl.output {
if let hir::TyKind::Rptr(lifetime, _) = ty.kind {
return_span = lifetime.span;
}

4
src/librustc_mir/borrow_check/diagnostics/region_name.rs
View File

@ -645,8 +645,8 @@ impl<'tcx> MirBorrowckCtxt<'_, 'tcx> {
..
}) => (
match return_ty.output {
hir::FunctionRetTy::DefaultReturn(_) => tcx.sess.source_map().end_point(*span),
hir::FunctionRetTy::Return(_) => return_ty.output.span(),
hir::FnRetTy::DefaultReturn(_) => tcx.sess.source_map().end_point(*span),
hir::FnRetTy::Return(_) => return_ty.output.span(),
},
if gen_move.is_some() { " of generator" } else { " of closure" },
),

53
src/librustc_mir/dataflow/generic/graphviz.rs
View File

@ -195,6 +195,8 @@ where
// C: Entry state
self.bg = Background::Light;
self.results.seek_to_block_start(block);
let block_entry_state = self.results.get().clone();
self.write_row_with_full_state(w, "", "(on entry)")?;
// D: Statement transfer functions
@ -213,29 +215,42 @@ where
self.write_row_for_location(w, "T", &terminator_str, terminator_loc)?;
// F: Exit state
// Write the full dataflow state immediately after the terminator if it differs from the
// state at block entry.
self.results.seek_after(terminator_loc);
if let mir::TerminatorKind::Call { destination: Some(_), .. } = &terminator.kind {
self.write_row_with_full_state(w, "", "(on unwind)")?;
if self.results.get() != &block_entry_state {
let after_terminator_name = match terminator.kind {
mir::TerminatorKind::Call { destination: Some(_), .. } => "(on unwind)",
_ => "(on exit)",
};
let num_state_columns = self.num_state_columns();
self.write_row(w, "", "(on successful return)", |this, w, fmt| {
write!(
w,
r#"<td balign="left" colspan="{colspan}" {fmt} align="left">"#,
colspan = num_state_columns,
fmt = fmt,
)?;
let state_on_unwind = this.results.get().clone();
this.results.seek_after_assume_call_returns(terminator_loc);
write_diff(w, this.results.analysis(), &state_on_unwind, this.results.get())?;
write!(w, "</td>")
})?;
} else {
self.write_row_with_full_state(w, "", "(on exit)")?;
self.write_row_with_full_state(w, "", after_terminator_name)?;
}
// Write any changes caused by terminator-specific effects
match terminator.kind {
mir::TerminatorKind::Call { destination: Some(_), .. } => {
let num_state_columns = self.num_state_columns();
self.write_row(w, "", "(on successful return)", |this, w, fmt| {
write!(
w,
r#"<td balign="left" colspan="{colspan}" {fmt} align="left">"#,
colspan = num_state_columns,
fmt = fmt,
)?;
let state_on_unwind = this.results.get().clone();
this.results.seek_after_assume_call_returns(terminator_loc);
write_diff(w, this.results.analysis(), &state_on_unwind, this.results.get())?;
write!(w, "</td>")
})?;
}
_ => {}
};
write!(w, "</table>")
}

6
src/librustc_parse/parser/expr.rs
View File

@ -10,9 +10,7 @@ use rustc_span::source_map::{self, Span, Spanned};
use rustc_span::symbol::{kw, sym, Symbol};
use std::mem;
use syntax::ast::{self, AttrStyle, AttrVec, CaptureBy, Field, Ident, Lit, DUMMY_NODE_ID};
use syntax::ast::{
AnonConst, BinOp, BinOpKind, FnDecl, FunctionRetTy, Mac, Param, Ty, TyKind, UnOp,
};
use syntax::ast::{AnonConst, BinOp, BinOpKind, FnDecl, FnRetTy, Mac, Param, Ty, TyKind, UnOp};
use syntax::ast::{Arm, Async, BlockCheckMode, Expr, ExprKind, Label, Movability, RangeLimits};
use syntax::ptr::P;
use syntax::token::{self, Token, TokenKind};
@ -1358,7 +1356,7 @@ impl<'a> Parser<'a> {
let decl = self.parse_fn_block_decl()?;
let decl_hi = self.prev_span;
let body = match decl.output {
FunctionRetTy::Default(_) => {
FnRetTy::Default(_) => {
let restrictions = self.restrictions - Restrictions::STMT_EXPR;
self.parse_expr_res(restrictions, None)?
}

4
src/librustc_parse/parser/item.rs
View File

@ -1343,14 +1343,14 @@ impl<'a> Parser<'a> {
/// Is this unambiguously the start of a `macro_rules! foo` item defnition?
fn is_macro_rules_item(&mut self) -> bool {
self.check_keyword(sym::macro_rules)
self.check_keyword(kw::MacroRules)
&& self.look_ahead(1, |t| *t == token::Not)
&& self.look_ahead(2, |t| t.is_ident())
}
/// Parses a legacy `macro_rules! foo { ... }` declarative macro.
fn parse_item_macro_rules(&mut self, vis: &Visibility) -> PResult<'a, ItemInfo> {
self.expect_keyword(sym::macro_rules)?; // `macro_rules`
self.expect_keyword(kw::MacroRules)?; // `macro_rules`
self.expect(&token::Not)?; // `!`
let ident = self.parse_ident()?;

10
src/librustc_parse/parser/ty.rs
View File

@ -5,9 +5,7 @@ use crate::{maybe_recover_from_interpolated_ty_qpath, maybe_whole};
use rustc_errors::{pluralize, struct_span_err, Applicability, PResult};
use rustc_span::source_map::Span;
use rustc_span::symbol::{kw, sym};
use syntax::ast::{
self, BareFnTy, FunctionRetTy, GenericParam, Ident, Lifetime, MutTy, Ty, TyKind,
};
use syntax::ast::{self, BareFnTy, FnRetTy, GenericParam, Ident, Lifetime, MutTy, Ty, TyKind};
use syntax::ast::{
GenericBound, GenericBounds, PolyTraitRef, TraitBoundModifier, TraitObjectSyntax,
};
@ -91,13 +89,13 @@ impl<'a> Parser<'a> {
&mut self,
allow_plus: AllowPlus,
recover_qpath: RecoverQPath,
) -> PResult<'a, FunctionRetTy> {
) -> PResult<'a, FnRetTy> {
Ok(if self.eat(&token::RArrow) {
// FIXME(Centril): Can we unconditionally `allow_plus`?
let ty = self.parse_ty_common(allow_plus, recover_qpath, AllowCVariadic::No)?;
FunctionRetTy::Ty(ty)
FnRetTy::Ty(ty)
} else {
FunctionRetTy::Default(self.token.span.shrink_to_lo())
FnRetTy::Default(self.token.span.shrink_to_lo())
})
}

2
src/librustc_resolve/late.rs
View File

@ -2035,7 +2035,7 @@ impl<'a, 'b, 'ast> LateResolutionVisitor<'a, 'b, 'ast> {
// Resolve arguments:
this.resolve_params(&fn_decl.inputs);
// No need to resolve return type --
// the outer closure return type is `FunctionRetTy::Default`.
// the outer closure return type is `FnRetTy::Default`.
// Now resolve the inner closure
{

4
src/librustc_resolve/lifetimes.rs
View File

@ -881,8 +881,8 @@ impl<'a, 'tcx> Visitor<'tcx> for LifetimeContext<'a, 'tcx> {
fn visit_fn_decl(&mut self, fd: &'tcx hir::FnDecl<'tcx>) {
let output = match fd.output {
hir::FunctionRetTy::DefaultReturn(_) => None,
hir::FunctionRetTy::Return(ref ty) => Some(&**ty),
hir::FnRetTy::DefaultReturn(_) => None,
hir::FnRetTy::Return(ref ty) => Some(&**ty),
};
self.visit_fn_like_elision(&fd.inputs, output);
}

10
src/librustc_save_analysis/dump_visitor.rs
View File

@ -285,7 +285,7 @@ impl<'l, 'tcx> DumpVisitor<'l, 'tcx> {
v.visit_ty(&arg.ty);
}
if let ast::FunctionRetTy::Ty(ref ret_ty) = sig.decl.output {
if let ast::FnRetTy::Ty(ref ret_ty) = sig.decl.output {
// In async functions, return types are desugared and redefined
// as an `impl Trait` existential type. Because of this, to match
// the definition paths when resolving nested types we need to
@ -374,7 +374,7 @@ impl<'l, 'tcx> DumpVisitor<'l, 'tcx> {
v.visit_ty(&arg.ty)
}
if let ast::FunctionRetTy::Ty(ref ret_ty) = decl.output {
if let ast::FnRetTy::Ty(ref ret_ty) = decl.output {
if let ast::TyKind::ImplTrait(..) = ret_ty.kind {
// FIXME: Opaque type desugaring prevents us from easily
// processing trait bounds. See `visit_ty` for more details.
@ -792,7 +792,7 @@ impl<'l, 'tcx> DumpVisitor<'l, 'tcx> {
for t in &data.inputs {
self.visit_ty(t);
}
if let ast::FunctionRetTy::Ty(ty) = &data.output {
if let ast::FnRetTy::Ty(ty) = &data.output {
self.visit_ty(ty);
}
}
@ -1449,7 +1449,7 @@ impl<'l, 'tcx> Visitor<'l> for DumpVisitor<'l, 'tcx> {
self.visit_ty(&arg.ty);
}
if let ast::FunctionRetTy::Ty(ref ret_ty) = decl.output {
if let ast::FnRetTy::Ty(ref ret_ty) = decl.output {
self.visit_ty(&ret_ty);
}
@ -1528,7 +1528,7 @@ impl<'l, 'tcx> Visitor<'l> for DumpVisitor<'l, 'tcx> {
self.visit_ty(&arg.ty);
}
if let ast::FunctionRetTy::Ty(ref ret_ty) = decl.output {
if let ast::FnRetTy::Ty(ref ret_ty) = decl.output {
self.visit_ty(&ret_ty);
}
}

4
src/librustc_save_analysis/lib.rs
View File

@ -880,8 +880,8 @@ fn make_signature(decl: &ast::FnDecl, generics: &ast::Generics) -> String {
sig.push_str(&decl.inputs.iter().map(param_to_string).collect::<Vec<_>>().join(", "));
sig.push(')');
match decl.output {
ast::FunctionRetTy::Default(_) => sig.push_str(" -> ()"),
ast::FunctionRetTy::Ty(ref t) => sig.push_str(&format!(" -> {}", ty_to_string(t))),
ast::FnRetTy::Default(_) => sig.push_str(" -> ()"),
ast::FnRetTy::Ty(ref t) => sig.push_str(&format!(" -> {}", ty_to_string(t))),
}
sig

8
src/librustc_save_analysis/sig.rs
View File

@ -241,7 +241,7 @@ impl Sig for ast::Ty {
refs.extend(nested.refs.into_iter());
}
text.push(')');
if let ast::FunctionRetTy::Ty(ref t) = f.decl.output {
if let ast::FnRetTy::Ty(ref t) = f.decl.output {
text.push_str(" -> ");
let nested = t.make(offset + text.len(), None, scx)?;
text.push_str(&nested.text);
@ -392,7 +392,7 @@ impl Sig for ast::Item {
}
sig.text.push(')');
if let ast::FunctionRetTy::Ty(ref t) = decl.output {
if let ast::FnRetTy::Ty(ref t) = decl.output {
sig.text.push_str(" -> ");
let nested = t.make(offset + sig.text.len(), None, scx)?;
sig.text.push_str(&nested.text);
@ -743,7 +743,7 @@ impl Sig for ast::ForeignItem {
}
sig.text.push(')');
if let ast::FunctionRetTy::Ty(ref t) = decl.output {
if let ast::FnRetTy::Ty(ref t) = decl.output {
sig.text.push_str(" -> ");
let nested = t.make(offset + sig.text.len(), None, scx)?;
sig.text.push_str(&nested.text);
@ -911,7 +911,7 @@ fn make_method_signature(
}
sig.text.push(')');
if let ast::FunctionRetTy::Ty(ref t) = m.decl.output {
if let ast::FnRetTy::Ty(ref t) = m.decl.output {
sig.text.push_str(" -> ");
let nested = t.make(sig.text.len(), None, scx)?;
sig.text.push_str(&nested.text);

5
src/librustc_span/symbol.rs
View File

@ -97,6 +97,7 @@ symbols! {
Auto: "auto",
Catch: "catch",
Default: "default",
MacroRules: "macro_rules",
Raw: "raw",
Union: "union",
}
@ -429,7 +430,6 @@ symbols! {
macro_lifetime_matcher,
macro_literal_matcher,
macro_reexport,
macro_rules,
macros_in_extern,
macro_use,
macro_vis_matcher,
@ -1071,6 +1071,9 @@ pub mod sym {
symbols!();
// Used from a macro in `librustc_feature/accepted.rs`
pub use super::kw::MacroRules as macro_rules;
// Get the symbol for an integer. The first few non-negative integers each
// have a static symbol and therefore are fast.
pub fn integer<N: TryInto<usize> + Copy + ToString>(n: N) -> Symbol {

4
src/librustc_typeck/astconv.rs
View File

@ -2827,11 +2827,11 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
}
let input_tys = decl.inputs.iter().map(|a| self.ty_of_arg(a, None));
let output_ty = match decl.output {
hir::FunctionRetTy::Return(ref output) => {
hir::FnRetTy::Return(ref output) => {
visitor.visit_ty(output);
self.ast_ty_to_ty(output)
}
hir::FunctionRetTy::DefaultReturn(..) => tcx.mk_unit(),
hir::FnRetTy::DefaultReturn(..) => tcx.mk_unit(),
};
debug!("ty_of_fn: output_ty={:?}", output_ty);

6
src/librustc_typeck/check/closure.rs
View File

@ -555,8 +555,8 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
// First, convert the types that the user supplied (if any).
let supplied_arguments = decl.inputs.iter().map(|a| astconv.ast_ty_to_ty(a));
let supplied_return = match decl.output {
hir::FunctionRetTy::Return(ref output) => astconv.ast_ty_to_ty(&output),
hir::FunctionRetTy::DefaultReturn(_) => match body.generator_kind {
hir::FnRetTy::Return(ref output) => astconv.ast_ty_to_ty(&output),
hir::FnRetTy::DefaultReturn(_) => match body.generator_kind {
// In the case of the async block that we create for a function body,
// we expect the return type of the block to match that of the enclosing
// function.
@ -703,7 +703,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
self.tcx.types.err
});
if let hir::FunctionRetTy::Return(ref output) = decl.output {
if let hir::FnRetTy::Return(ref output) = decl.output {
astconv.ast_ty_to_ty(&output);
}

6
src/librustc_typeck/check/coercion.rs
View File

@ -1363,7 +1363,7 @@ impl<'tcx, 'exprs, E: AsCoercionSite> CoerceMany<'tcx, 'exprs, E> {
fcx: &FnCtxt<'a, 'tcx>,
expected: Ty<'tcx>,
sp: Span,
fn_output: &hir::FunctionRetTy<'_>,
fn_output: &hir::FnRetTy<'_>,
) {
let return_sp = fn_output.span();
err.span_label(return_sp, "expected because this return type...");
@ -1389,7 +1389,7 @@ impl<'tcx, 'exprs, E: AsCoercionSite> CoerceMany<'tcx, 'exprs, E> {
let has_impl = snippet_iter.next().map_or(false, |s| s == "impl");
// Only suggest `Box<dyn Trait>` if `Trait` in `impl Trait` is object safe.
let mut is_object_safe = false;
if let hir::FunctionRetTy::Return(ty) = fn_output {
if let hir::FnRetTy::Return(ty) = fn_output {
// Get the return type.
if let hir::TyKind::Def(..) = ty.kind {
let ty = AstConv::ast_ty_to_ty(fcx, ty);
@ -1430,7 +1430,7 @@ impl<'tcx, 'exprs, E: AsCoercionSite> CoerceMany<'tcx, 'exprs, E> {
fn is_return_ty_unsized(&self, fcx: &FnCtxt<'a, 'tcx>, blk_id: hir::HirId) -> bool {
if let Some((fn_decl, _)) = fcx.get_fn_decl(blk_id) {
if let hir::FunctionRetTy::Return(ty) = fn_decl.output {
if let hir::FnRetTy::Return(ty) = fn_decl.output {
let ty = AstConv::ast_ty_to_ty(fcx, ty);
if let ty::Dynamic(..) = ty.kind {
return true;

10
src/librustc_typeck/check/mod.rs
View File

@ -5153,7 +5153,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
// Only suggest changing the return type for methods that
// haven't set a return type at all (and aren't `fn main()` or an impl).
match (&fn_decl.output, found.is_suggestable(), can_suggest, expected.is_unit()) {
(&hir::FunctionRetTy::DefaultReturn(span), true, true, true) => {
(&hir::FnRetTy::DefaultReturn(span), true, true, true) => {
err.span_suggestion(
span,
"try adding a return type",
@ -5162,18 +5162,18 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
);
true
}
(&hir::FunctionRetTy::DefaultReturn(span), false, true, true) => {
(&hir::FnRetTy::DefaultReturn(span), false, true, true) => {
err.span_label(span, "possibly return type missing here?");
true
}
(&hir::FunctionRetTy::DefaultReturn(span), _, false, true) => {
(&hir::FnRetTy::DefaultReturn(span), _, false, true) => {
// `fn main()` must return `()`, do not suggest changing return type
err.span_label(span, "expected `()` because of default return type");
true
}
// expectation was caused by something else, not the default return
(&hir::FunctionRetTy::DefaultReturn(_), _, _, false) => false,
(&hir::FunctionRetTy::Return(ref ty), _, _, _) => {
(&hir::FnRetTy::DefaultReturn(_), _, _, false) => false,
(&hir::FnRetTy::Return(ref ty), _, _, _) => {
// Only point to return type if the expected type is the return type, as if they
// are not, the expectation must have been caused by something else.
debug!("suggest_missing_return_type: return type {:?} node {:?}", ty, ty.kind);

2
src/librustc_typeck/check/wfcheck.rs
View File

@ -214,7 +214,7 @@ fn check_object_unsafe_self_trait_by_name(tcx: TyCtxt<'_>, item: &hir::TraitItem
}
}
match sig.decl.output {
hir::FunctionRetTy::Return(ty) if could_be_self(trait_def_id, ty) => {
hir::FnRetTy::Return(ty) if could_be_self(trait_def_id, ty) => {
trait_should_be_self.push(ty.span);
}
_ => {}

6
src/librustc_typeck/collect.rs
View File

@ -1360,8 +1360,8 @@ fn is_suggestable_infer_ty(ty: &hir::Ty<'_>) -> bool {
}
}
pub fn get_infer_ret_ty(output: &'hir hir::FunctionRetTy<'hir>) -> Option<&'hir hir::Ty<'hir>> {
if let hir::FunctionRetTy::Return(ref ty) = output {
pub fn get_infer_ret_ty(output: &'hir hir::FnRetTy<'hir>) -> Option<&'hir hir::Ty<'hir>> {
if let hir::FnRetTy::Return(ref ty) = output {
if is_suggestable_infer_ty(ty) {
return Some(&**ty);
}
@ -2079,7 +2079,7 @@ fn compute_sig_of_foreign_fn_decl<'tcx>(
for (input, ty) in decl.inputs.iter().zip(*fty.inputs().skip_binder()) {
check(&input, ty)
}
if let hir::FunctionRetTy::Return(ref ty) = decl.output {
if let hir::FnRetTy::Return(ref ty) = decl.output {
check(&ty, *fty.output().skip_binder())
}
}

6
src/librustdoc/clean/mod.rs
View File

@ -43,7 +43,7 @@ use utils::*;
pub use utils::{get_auto_trait_and_blanket_impls, krate, register_res};
pub use self::types::FunctionRetTy::*;
pub use self::types::FnRetTy::*;
pub use self::types::ItemEnum::*;
pub use self::types::SelfTy::*;
pub use self::types::Type::*;
@ -1001,8 +1001,8 @@ impl<'tcx> Clean<FnDecl> for (DefId, ty::PolyFnSig<'tcx>) {
}
}
impl Clean<FunctionRetTy> for hir::FunctionRetTy<'_> {
fn clean(&self, cx: &DocContext<'_>) -> FunctionRetTy {
impl Clean<FnRetTy> for hir::FnRetTy<'_> {
fn clean(&self, cx: &DocContext<'_>) -> FnRetTy {
match *self {
Self::Return(ref typ) => Return(typ.clean(cx)),
Self::DefaultReturn(..) => DefaultReturn,

14
src/librustdoc/clean/types.rs
View File

@ -35,7 +35,7 @@ use crate::doctree;
use crate::html::item_type::ItemType;
use crate::html::render::{cache, ExternalLocation};
use self::FunctionRetTy::*;
use self::FnRetTy::*;
use self::ItemEnum::*;
use self::SelfTy::*;
use self::Type::*;
@ -862,7 +862,7 @@ pub struct Function {
#[derive(Clone, PartialEq, Eq, Debug, Hash)]
pub struct FnDecl {
pub inputs: Arguments,
pub output: FunctionRetTy,
pub output: FnRetTy,
pub c_variadic: bool,
pub attrs: Attributes,
}
@ -881,12 +881,12 @@ impl FnDecl {
///
/// This function will panic if the return type does not match the expected sugaring for async
/// functions.
pub fn sugared_async_return_type(&self) -> FunctionRetTy {
pub fn sugared_async_return_type(&self) -> FnRetTy {
match &self.output {
FunctionRetTy::Return(Type::ImplTrait(bounds)) => match &bounds[0] {
FnRetTy::Return(Type::ImplTrait(bounds)) => match &bounds[0] {
GenericBound::TraitBound(PolyTrait { trait_, .. }, ..) => {
let bindings = trait_.bindings().unwrap();
FunctionRetTy::Return(bindings[0].ty().clone())
FnRetTy::Return(bindings[0].ty().clone())
}
_ => panic!("unexpected desugaring of async function"),
},
@ -931,12 +931,12 @@ impl Argument {
}
#[derive(Clone, PartialEq, Eq, Debug, Hash)]
pub enum FunctionRetTy {
pub enum FnRetTy {
Return(Type),
DefaultReturn,
}
impl GetDefId for FunctionRetTy {
impl GetDefId for FnRetTy {
fn def_id(&self) -> Option<DefId> {
match *self {
Return(ref ty) => ty.def_id(),

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

@ -1,7 +1,7 @@
use crate::clean::auto_trait::AutoTraitFinder;
use crate::clean::blanket_impl::BlanketImplFinder;
use crate::clean::{
inline, Clean, Crate, Deprecation, ExternalCrate, FnDecl, FunctionRetTy, Generic, GenericArg,
inline, Clean, Crate, Deprecation, ExternalCrate, FnDecl, FnRetTy, Generic, GenericArg,
GenericArgs, GenericBound, Generics, GetDefId, ImportSource, Item, ItemEnum, MacroKind, Path,
PathSegment, Primitive, PrimitiveType, ResolvedPath, Span, Stability, Type, TypeBinding,
TypeKind, Visibility, WherePredicate,
@ -273,7 +273,7 @@ pub fn get_all_types(
}
let ret_types = match decl.output {
FunctionRetTy::Return(ref return_type) => {
FnRetTy::Return(ref return_type) => {
let mut ret = get_real_types(generics, &return_type, cx, 0);
if ret.is_empty() {
ret.insert(return_type.clone());

2
src/librustdoc/html/format.rs
View File

@ -933,7 +933,7 @@ impl clean::Arguments {
}
}
impl clean::FunctionRetTy {
impl clean::FnRetTy {
crate fn print(&self) -> impl fmt::Display + '_ {
display_fn(move |f| match self {
clean::Return(clean::Tuple(tys)) if tys.is_empty() => Ok(()),

13
src/libsyntax/ast.rs
View File

@ -243,7 +243,7 @@ pub struct ParenthesizedArgs {
pub inputs: Vec<P<Ty>>,
/// `C`
pub output: FunctionRetTy,
pub output: FnRetTy,
}
impl ParenthesizedArgs {
@ -2083,7 +2083,7 @@ impl Param {
#[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
pub struct FnDecl {
pub inputs: Vec<Param>,
pub output: FunctionRetTy,
pub output: FnRetTy,
}
impl FnDecl {
@ -2168,8 +2168,7 @@ impl fmt::Debug for ImplPolarity {
}
#[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
pub enum FunctionRetTy {
// FIXME(Centril): Rename to `FnRetTy` and in HIR also.
pub enum FnRetTy {
/// Returns type is not specified.
///
/// Functions default to `()` and closures default to inference.
@ -2179,11 +2178,11 @@ pub enum FunctionRetTy {
Ty(P<Ty>),
}
impl FunctionRetTy {
impl FnRetTy {
pub fn span(&self) -> Span {
match *self {
FunctionRetTy::Default(span) => span,
FunctionRetTy::Ty(ref ty) => ty.span,
FnRetTy::Default(span) => span,
FnRetTy::Ty(ref ty) => ty.span,
}
}
}

6
src/libsyntax/mut_visit.rs
View File

@ -744,10 +744,10 @@ pub fn noop_visit_fn_decl<T: MutVisitor>(decl: &mut P<FnDecl>, vis: &mut T) {
noop_visit_fn_ret_ty(output, vis);
}
pub fn noop_visit_fn_ret_ty<T: MutVisitor>(fn_ret_ty: &mut FunctionRetTy, vis: &mut T) {
pub fn noop_visit_fn_ret_ty<T: MutVisitor>(fn_ret_ty: &mut FnRetTy, vis: &mut T) {
match fn_ret_ty {
FunctionRetTy::Default(span) => vis.visit_span(span),
FunctionRetTy::Ty(ty) => vis.visit_ty(ty),
FnRetTy::Default(span) => vis.visit_span(span),
FnRetTy::Ty(ty) => vis.visit_ty(ty),
}
}

6
src/libsyntax/visit.rs
View File

@ -215,7 +215,7 @@ pub trait Visitor<'ast>: Sized {
fn visit_vis(&mut self, vis: &'ast Visibility) {
walk_vis(self, vis)
}
fn visit_fn_ret_ty(&mut self, ret_ty: &'ast FunctionRetTy) {
fn visit_fn_ret_ty(&mut self, ret_ty: &'ast FnRetTy) {
walk_fn_ret_ty(self, ret_ty)
}
fn visit_fn_header(&mut self, _header: &'ast FnHeader) {
@ -594,8 +594,8 @@ pub fn walk_where_predicate<'a, V: Visitor<'a>>(visitor: &mut V, predicate: &'a
}
}
pub fn walk_fn_ret_ty<'a, V: Visitor<'a>>(visitor: &mut V, ret_ty: &'a FunctionRetTy) {
if let FunctionRetTy::Ty(ref output_ty) = *ret_ty {
pub fn walk_fn_ret_ty<'a, V: Visitor<'a>>(visitor: &mut V, ret_ty: &'a FnRetTy) {
if let FnRetTy::Ty(ref output_ty) = *ret_ty {
visitor.visit_ty(output_ty)
}
}

2
src/test/ui-fulldeps/pprust-expr-roundtrip.rs
View File

@ -117,7 +117,7 @@ fn iter_exprs(depth: usize, f: &mut dyn FnMut(P<Expr>)) {
11 => {
let decl = P(FnDecl {
inputs: vec![],
output: FunctionRetTy::Default(DUMMY_SP),
output: FnRetTy::Default(DUMMY_SP),
});
iter_exprs(depth - 1, &mut |e| g(
ExprKind::Closure(CaptureBy::Value,