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https://github.com/rust-lang/rust
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Rollup merge of #104614 - Nilstrieb:type-ascribe!, r=TaKO8Ki
Add `type_ascribe!` macro as placeholder syntax for type ascription This makes it still possible to test the internal semantics of type ascription even once the `:`-syntax is removed from the parser. The macro now gets used in a bunch of UI tests that test the semantics and not syntax of type ascription. I might have forgotten a few tests but this should hopefully be most of them. The remaining ones will certainly be found once type ascription is removed from the parser altogether. Part of #101728
This commit is contained in:
Matthias Krüger
GitHub
commit
4fdc3eb176
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@ -45,6 +45,7 @@
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mod source_util;
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mod test;
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mod trace_macros;
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mod type_ascribe;
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mod util;
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pub mod asm;
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@ -92,6 +93,7 @@ pub fn register_builtin_macros(resolver: &mut dyn ResolverExpand) {
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unreachable: edition_panic::expand_unreachable,
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stringify: source_util::expand_stringify,
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trace_macros: trace_macros::expand_trace_macros,
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type_ascribe: type_ascribe::expand_type_ascribe,
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}
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register_attr! {
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35
compiler/rustc_builtin_macros/src/type_ascribe.rs
Normal file
35
compiler/rustc_builtin_macros/src/type_ascribe.rs
Normal file
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@ -0,0 +1,35 @@
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use rustc_ast::ptr::P;
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use rustc_ast::tokenstream::TokenStream;
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use rustc_ast::{token, Expr, ExprKind, Ty};
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use rustc_errors::PResult;
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use rustc_expand::base::{self, DummyResult, ExtCtxt, MacEager};
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use rustc_span::Span;
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pub fn expand_type_ascribe(
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cx: &mut ExtCtxt<'_>,
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span: Span,
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tts: TokenStream,
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) -> Box<dyn base::MacResult + 'static> {
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let (expr, ty) = match parse_ascribe(cx, tts) {
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Ok(parsed) => parsed,
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Err(mut err) => {
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err.emit();
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return DummyResult::any(span);
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}
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};
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let asc_expr = cx.expr(span, ExprKind::Type(expr, ty));
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return MacEager::expr(asc_expr);
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}
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fn parse_ascribe<'a>(cx: &mut ExtCtxt<'a>, stream: TokenStream) -> PResult<'a, (P<Expr>, P<Ty>)> {
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let mut parser = cx.new_parser_from_tts(stream);
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let expr = parser.parse_expr()?;
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parser.expect(&token::Comma)?;
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let ty = parser.parse_ty()?;
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Ok((expr, ty))
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}
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@ -1488,6 +1488,7 @@
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ty,
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type_alias_enum_variants,
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type_alias_impl_trait,
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type_ascribe,
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type_ascription,
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type_changing_struct_update,
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type_id,
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@ -1546,6 +1546,18 @@ macro_rules! trace_macros {
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/* compiler built-in */
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}
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/// Unstable placeholder for type ascription.
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#[rustc_builtin_macro]
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#[unstable(
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feature = "type_ascription",
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issue = "23416",
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reason = "placeholder syntax for type ascription"
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)]
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#[cfg(not(bootstrap))]
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pub macro type_ascribe($expr:expr, $ty:ty) {
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/* compiler built-in */
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}
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/// Unstable implementation detail of the `rustc` compiler, do not use.
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#[rustc_builtin_macro]
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#[stable(feature = "rust1", since = "1.0.0")]
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@ -98,3 +98,11 @@
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reason = "`cfg_eval` is a recently implemented feature"
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)]
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pub use crate::macros::builtin::cfg_eval;
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#[unstable(
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feature = "type_ascription",
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issue = "23416",
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reason = "placeholder syntax for type ascription"
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)]
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#[cfg(not(bootstrap))]
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pub use crate::macros::builtin::type_ascribe;
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@ -85,6 +85,15 @@
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)]
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pub use core::prelude::v1::cfg_eval;
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// Do not `doc(no_inline)` either.
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#[unstable(
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feature = "type_ascription",
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issue = "23416",
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reason = "placeholder syntax for type ascription"
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)]
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#[cfg(not(bootstrap))]
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pub use core::prelude::v1::type_ascribe;
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// The file so far is equivalent to src/libcore/prelude/v1.rs,
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// and below to src/liballoc/prelude.rs.
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// Those files are duplicated rather than using glob imports
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@ -1,9 +1,11 @@
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#![feature(type_ascription)]
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fn e() {
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p:a<p:p<e=6>>
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//~^ ERROR comparison operators
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type_ascribe!(p, a<p:p<e=6>>);
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//~^ ERROR cannot find type `a` in this scope
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//~| ERROR cannot find value
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//~| ERROR associated const equality
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//~| ERROR associated const equality
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//~| ERROR cannot find trait `p` in this scope
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//~| ERROR associated type bounds
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}
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@ -1,65 +1,40 @@
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error: comparison operators cannot be chained
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--> $DIR/issue-93835.rs:2:8
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LL | fn e() {
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| - while parsing this struct
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LL | p:a<p:p<e=6>>
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| ^ ^
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= help: use `::<...>` instead of `<...>` to specify lifetime, type, or const arguments
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= help: or use `(...)` if you meant to specify fn arguments
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error[E0425]: cannot find value `p` in this scope
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--> $DIR/issue-93835.rs:2:5
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--> $DIR/issue-93835.rs:4:19
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LL | p:a<p:p<e=6>>
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| ^ not found in this scope
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LL | type_ascribe!(p, a<p:p<e=6>>);
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| ^ not found in this scope
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error[E0412]: cannot find type `a` in this scope
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--> $DIR/issue-93835.rs:4:22
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help: you might have meant to write a `struct` literal
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LL | type_ascribe!(p, a<p:p<e=6>>);
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| ^ not found in this scope
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error[E0405]: cannot find trait `p` in this scope
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--> $DIR/issue-93835.rs:4:26
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LL ~ fn e() { SomeStruct {
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LL | p:a<p:p<e=6>>
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...
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LL |
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LL ~ }}
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help: maybe you meant to write a path separator here
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LL | p::a<p:p<e=6>>
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| ~~
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help: maybe you meant to write an assignment here
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LL | let p:a<p:p<e=6>>
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| ~~~~~
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LL | type_ascribe!(p, a<p:p<e=6>>);
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| ^ not found in this scope
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error[E0658]: associated const equality is incomplete
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--> $DIR/issue-93835.rs:2:13
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--> $DIR/issue-93835.rs:4:28
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LL | p:a<p:p<e=6>>
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| ^^^
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= note: see issue #92827 <https://github.com/rust-lang/rust/issues/92827> for more information
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= help: add `#![feature(associated_const_equality)]` to the crate attributes to enable
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error[E0658]: associated const equality is incomplete
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--> $DIR/issue-93835.rs:2:13
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LL | p:a<p:p<e=6>>
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| ^^^
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LL | type_ascribe!(p, a<p:p<e=6>>);
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| ^^^
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= note: see issue #92827 <https://github.com/rust-lang/rust/issues/92827> for more information
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= help: add `#![feature(associated_const_equality)]` to the crate attributes to enable
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error[E0658]: associated type bounds are unstable
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--> $DIR/issue-93835.rs:2:9
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--> $DIR/issue-93835.rs:4:24
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LL | p:a<p:p<e=6>>
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| ^^^^^^^^
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LL | type_ascribe!(p, a<p:p<e=6>>);
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| ^^^^^^^^
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= note: see issue #52662 <https://github.com/rust-lang/rust/issues/52662> for more information
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= help: add `#![feature(associated_type_bounds)]` to the crate attributes to enable
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error: aborting due to 5 previous errors
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Some errors have detailed explanations: E0425, E0658.
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For more information about an error, try `rustc --explain E0425`.
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Some errors have detailed explanations: E0405, E0412, E0425, E0658.
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For more information about an error, try `rustc --explain E0405`.
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@ -1,5 +1,7 @@
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#![feature(type_ascription)]
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fn main() {
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2: n([u8; || 1])
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type_ascribe!(2, n([u8; || 1]))
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//~^ ERROR cannot find type `n` in this scope
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//~| ERROR mismatched types
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}
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@ -1,21 +1,26 @@
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error[E0412]: cannot find type `n` in this scope
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--> $DIR/issue-90871.rs:2:8
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--> $DIR/issue-90871.rs:4:22
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LL | 2: n([u8; || 1])
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| ^ expecting a type here because of type ascription
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LL | type_ascribe!(2, n([u8; || 1]))
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| ^ help: a trait with a similar name exists: `Fn`
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::: $SRC_DIR/core/src/ops/function.rs:LL:COL
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LL | pub trait Fn<Args: Tuple>: FnMut<Args> {
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| -------------------------------------- similarly named trait `Fn` defined here
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error[E0308]: mismatched types
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--> $DIR/issue-90871.rs:2:15
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--> $DIR/issue-90871.rs:4:29
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LL | 2: n([u8; || 1])
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| ^^^^ expected `usize`, found closure
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LL | type_ascribe!(2, n([u8; || 1]))
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| ^^^^ expected `usize`, found closure
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= note: expected type `usize`
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found closure `[closure@$DIR/issue-90871.rs:2:15: 2:17]`
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found closure `[closure@$DIR/issue-90871.rs:4:29: 4:31]`
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help: use parentheses to call this closure
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LL | 2: n([u8; (|| 1)()])
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| + +++
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LL | type_ascribe!(2, n([u8; (|| 1)()]))
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| + +++
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error: aborting due to 2 previous errors
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@ -6,27 +6,27 @@
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use std::fmt::Debug;
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pub fn main() {
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let _ = box { [1, 2, 3] }: Box<[i32]>; //~ ERROR mismatched types
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let _ = box if true { [1, 2, 3] } else { [1, 3, 4] }: Box<[i32]>; //~ ERROR mismatched types
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let _ = box match true { true => [1, 2, 3], false => [1, 3, 4] }: Box<[i32]>;
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let _ = type_ascribe!(box { [1, 2, 3] }, Box<[i32]>); //~ ERROR mismatched types
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let _ = type_ascribe!(box if true { [1, 2, 3] } else { [1, 3, 4] }, Box<[i32]>); //~ ERROR mismatched types
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let _ = type_ascribe!(box match true { true => [1, 2, 3], false => [1, 3, 4] }, Box<[i32]>);
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//~^ ERROR mismatched types
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let _ = box { |x| (x as u8) }: Box<dyn Fn(i32) -> _>; //~ ERROR mismatched types
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let _ = box if true { false } else { true }: Box<dyn Debug>; //~ ERROR mismatched types
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let _ = box match true { true => 'a', false => 'b' }: Box<dyn Debug>; //~ ERROR mismatched types
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let _ = type_ascribe!(box { |x| (x as u8) }, Box<dyn Fn(i32) -> _>); //~ ERROR mismatched types
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let _ = type_ascribe!(box if true { false } else { true }, Box<dyn Debug>); //~ ERROR mismatched types
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let _ = type_ascribe!(box match true { true => 'a', false => 'b' }, Box<dyn Debug>); //~ ERROR mismatched types
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let _ = &{ [1, 2, 3] }: &[i32]; //~ ERROR mismatched types
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let _ = &if true { [1, 2, 3] } else { [1, 3, 4] }: &[i32]; //~ ERROR mismatched types
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let _ = &match true { true => [1, 2, 3], false => [1, 3, 4] }: &[i32];
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let _ = type_ascribe!(&{ [1, 2, 3] }, &[i32]); //~ ERROR mismatched types
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let _ = type_ascribe!(&if true { [1, 2, 3] } else { [1, 3, 4] }, &[i32]); //~ ERROR mismatched types
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let _ = type_ascribe!(&match true { true => [1, 2, 3], false => [1, 3, 4] }, &[i32]);
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//~^ ERROR mismatched types
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let _ = &{ |x| (x as u8) }: &dyn Fn(i32) -> _; //~ ERROR mismatched types
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let _ = &if true { false } else { true }: &dyn Debug; //~ ERROR mismatched types
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let _ = &match true { true => 'a', false => 'b' }: &dyn Debug; //~ ERROR mismatched types
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let _ = type_ascribe!(&{ |x| (x as u8) }, &dyn Fn(i32) -> _); //~ ERROR mismatched types
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let _ = type_ascribe!(&if true { false } else { true }, &dyn Debug); //~ ERROR mismatched types
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let _ = type_ascribe!(&match true { true => 'a', false => 'b' }, &dyn Debug); //~ ERROR mismatched types
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let _ = Box::new([1, 2, 3]): Box<[i32]>; //~ ERROR mismatched types
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let _ = Box::new(|x| (x as u8)): Box<dyn Fn(i32) -> _>; //~ ERROR mismatched types
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let _ = type_ascribe!(Box::new([1, 2, 3]), Box<[i32]>); //~ ERROR mismatched types
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let _ = type_ascribe!(Box::new(|x| (x as u8)), Box<dyn Fn(i32) -> _>); //~ ERROR mismatched types
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let _ = vec![
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let _ = type_ascribe!(vec![
|
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Box::new(|x| (x as u8)),
|
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box |x| (x as i16 as u8),
|
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]: Vec<Box<dyn Fn(i32) -> _>>;
|
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], Vec<Box<dyn Fn(i32) -> _>>);
|
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}
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|
|
|
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|
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@ -1,128 +1,128 @@
|
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error[E0308]: mismatched types
|
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--> $DIR/coerce-expect-unsized-ascribed.rs:9:13
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--> $DIR/coerce-expect-unsized-ascribed.rs:9:27
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|
|
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LL | let _ = box { [1, 2, 3] }: Box<[i32]>;
|
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| ^^^^^^^^^^^^^^^^^ expected slice `[i32]`, found array `[i32; 3]`
|
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LL | let _ = type_ascribe!(box { [1, 2, 3] }, Box<[i32]>);
|
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| ^^^^^^^^^^^^^^^^^ expected slice `[i32]`, found array `[i32; 3]`
|
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|
|
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= note: expected struct `Box<[i32]>`
|
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found struct `Box<[i32; 3]>`
|
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|
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error[E0308]: mismatched types
|
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--> $DIR/coerce-expect-unsized-ascribed.rs:10:13
|
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--> $DIR/coerce-expect-unsized-ascribed.rs:10:27
|
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|
|
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LL | let _ = box if true { [1, 2, 3] } else { [1, 3, 4] }: Box<[i32]>;
|
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected slice `[i32]`, found array `[i32; 3]`
|
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LL | let _ = type_ascribe!(box if true { [1, 2, 3] } else { [1, 3, 4] }, Box<[i32]>);
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected slice `[i32]`, found array `[i32; 3]`
|
||||
|
|
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= note: expected struct `Box<[i32]>`
|
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found struct `Box<[i32; 3]>`
|
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|
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error[E0308]: mismatched types
|
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--> $DIR/coerce-expect-unsized-ascribed.rs:11:13
|
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--> $DIR/coerce-expect-unsized-ascribed.rs:11:27
|
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|
|
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LL | let _ = box match true { true => [1, 2, 3], false => [1, 3, 4] }: Box<[i32]>;
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected slice `[i32]`, found array `[i32; 3]`
|
||||
LL | let _ = type_ascribe!(box match true { true => [1, 2, 3], false => [1, 3, 4] }, Box<[i32]>);
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected slice `[i32]`, found array `[i32; 3]`
|
||||
|
|
||||
= note: expected struct `Box<[i32]>`
|
||||
found struct `Box<[i32; 3]>`
|
||||
|
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error[E0308]: mismatched types
|
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--> $DIR/coerce-expect-unsized-ascribed.rs:13:13
|
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--> $DIR/coerce-expect-unsized-ascribed.rs:13:27
|
||||
|
|
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LL | let _ = box { |x| (x as u8) }: Box<dyn Fn(i32) -> _>;
|
||||
| ^^^^^^^^^^^^^^^^^^^^^ expected trait object `dyn Fn`, found closure
|
||||
LL | let _ = type_ascribe!(box { |x| (x as u8) }, Box<dyn Fn(i32) -> _>);
|
||||
| ^^^^^^^^^^^^^^^^^^^^^ expected trait object `dyn Fn`, found closure
|
||||
|
|
||||
= note: expected struct `Box<dyn Fn(i32) -> u8>`
|
||||
found struct `Box<[closure@$DIR/coerce-expect-unsized-ascribed.rs:13:19: 13:22]>`
|
||||
found struct `Box<[closure@$DIR/coerce-expect-unsized-ascribed.rs:13:33: 13:36]>`
|
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|
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error[E0308]: mismatched types
|
||||
--> $DIR/coerce-expect-unsized-ascribed.rs:14:13
|
||||
--> $DIR/coerce-expect-unsized-ascribed.rs:14:27
|
||||
|
|
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LL | let _ = box if true { false } else { true }: Box<dyn Debug>;
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected trait object `dyn Debug`, found `bool`
|
||||
LL | let _ = type_ascribe!(box if true { false } else { true }, Box<dyn Debug>);
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected trait object `dyn Debug`, found `bool`
|
||||
|
|
||||
= note: expected struct `Box<dyn Debug>`
|
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found struct `Box<bool>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/coerce-expect-unsized-ascribed.rs:15:13
|
||||
--> $DIR/coerce-expect-unsized-ascribed.rs:15:27
|
||||
|
|
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LL | let _ = box match true { true => 'a', false => 'b' }: Box<dyn Debug>;
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected trait object `dyn Debug`, found `char`
|
||||
LL | let _ = type_ascribe!(box match true { true => 'a', false => 'b' }, Box<dyn Debug>);
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected trait object `dyn Debug`, found `char`
|
||||
|
|
||||
= note: expected struct `Box<dyn Debug>`
|
||||
found struct `Box<char>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/coerce-expect-unsized-ascribed.rs:17:13
|
||||
--> $DIR/coerce-expect-unsized-ascribed.rs:17:27
|
||||
|
|
||||
LL | let _ = &{ [1, 2, 3] }: &[i32];
|
||||
| ^^^^^^^^^^^^^^ expected slice `[i32]`, found array `[i32; 3]`
|
||||
LL | let _ = type_ascribe!(&{ [1, 2, 3] }, &[i32]);
|
||||
| ^^^^^^^^^^^^^^ expected slice `[i32]`, found array `[i32; 3]`
|
||||
|
|
||||
= note: expected reference `&[i32]`
|
||||
found reference `&[i32; 3]`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/coerce-expect-unsized-ascribed.rs:18:13
|
||||
--> $DIR/coerce-expect-unsized-ascribed.rs:18:27
|
||||
|
|
||||
LL | let _ = &if true { [1, 2, 3] } else { [1, 3, 4] }: &[i32];
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected slice `[i32]`, found array `[i32; 3]`
|
||||
LL | let _ = type_ascribe!(&if true { [1, 2, 3] } else { [1, 3, 4] }, &[i32]);
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected slice `[i32]`, found array `[i32; 3]`
|
||||
|
|
||||
= note: expected reference `&[i32]`
|
||||
found reference `&[i32; 3]`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/coerce-expect-unsized-ascribed.rs:19:13
|
||||
--> $DIR/coerce-expect-unsized-ascribed.rs:19:27
|
||||
|
|
||||
LL | let _ = &match true { true => [1, 2, 3], false => [1, 3, 4] }: &[i32];
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected slice `[i32]`, found array `[i32; 3]`
|
||||
LL | let _ = type_ascribe!(&match true { true => [1, 2, 3], false => [1, 3, 4] }, &[i32]);
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected slice `[i32]`, found array `[i32; 3]`
|
||||
|
|
||||
= note: expected reference `&[i32]`
|
||||
found reference `&[i32; 3]`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/coerce-expect-unsized-ascribed.rs:21:13
|
||||
--> $DIR/coerce-expect-unsized-ascribed.rs:21:27
|
||||
|
|
||||
LL | let _ = &{ |x| (x as u8) }: &dyn Fn(i32) -> _;
|
||||
| ^^^^^^^^^^^^^^^^^^ expected trait object `dyn Fn`, found closure
|
||||
LL | let _ = type_ascribe!(&{ |x| (x as u8) }, &dyn Fn(i32) -> _);
|
||||
| ^^^^^^^^^^^^^^^^^^ expected trait object `dyn Fn`, found closure
|
||||
|
|
||||
= note: expected reference `&dyn Fn(i32) -> u8`
|
||||
found reference `&[closure@$DIR/coerce-expect-unsized-ascribed.rs:21:16: 21:19]`
|
||||
found reference `&[closure@$DIR/coerce-expect-unsized-ascribed.rs:21:30: 21:33]`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/coerce-expect-unsized-ascribed.rs:22:13
|
||||
--> $DIR/coerce-expect-unsized-ascribed.rs:22:27
|
||||
|
|
||||
LL | let _ = &if true { false } else { true }: &dyn Debug;
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected trait object `dyn Debug`, found `bool`
|
||||
LL | let _ = type_ascribe!(&if true { false } else { true }, &dyn Debug);
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected trait object `dyn Debug`, found `bool`
|
||||
|
|
||||
= note: expected reference `&dyn Debug`
|
||||
found reference `&bool`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/coerce-expect-unsized-ascribed.rs:23:13
|
||||
--> $DIR/coerce-expect-unsized-ascribed.rs:23:27
|
||||
|
|
||||
LL | let _ = &match true { true => 'a', false => 'b' }: &dyn Debug;
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected trait object `dyn Debug`, found `char`
|
||||
LL | let _ = type_ascribe!(&match true { true => 'a', false => 'b' }, &dyn Debug);
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected trait object `dyn Debug`, found `char`
|
||||
|
|
||||
= note: expected reference `&dyn Debug`
|
||||
found reference `&char`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/coerce-expect-unsized-ascribed.rs:25:13
|
||||
--> $DIR/coerce-expect-unsized-ascribed.rs:25:27
|
||||
|
|
||||
LL | let _ = Box::new([1, 2, 3]): Box<[i32]>;
|
||||
| ^^^^^^^^^^^^^^^^^^^ expected slice `[i32]`, found array `[i32; 3]`
|
||||
LL | let _ = type_ascribe!(Box::new([1, 2, 3]), Box<[i32]>);
|
||||
| ^^^^^^^^^^^^^^^^^^^ expected slice `[i32]`, found array `[i32; 3]`
|
||||
|
|
||||
= note: expected struct `Box<[i32]>`
|
||||
found struct `Box<[i32; 3]>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/coerce-expect-unsized-ascribed.rs:26:13
|
||||
--> $DIR/coerce-expect-unsized-ascribed.rs:26:27
|
||||
|
|
||||
LL | let _ = Box::new(|x| (x as u8)): Box<dyn Fn(i32) -> _>;
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^ expected trait object `dyn Fn`, found closure
|
||||
LL | let _ = type_ascribe!(Box::new(|x| (x as u8)), Box<dyn Fn(i32) -> _>);
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^ expected trait object `dyn Fn`, found closure
|
||||
|
|
||||
= note: expected struct `Box<dyn Fn(i32) -> u8>`
|
||||
found struct `Box<[closure@$DIR/coerce-expect-unsized-ascribed.rs:26:22: 26:25]>`
|
||||
found struct `Box<[closure@$DIR/coerce-expect-unsized-ascribed.rs:26:36: 26:39]>`
|
||||
|
||||
error: aborting due to 14 previous errors
|
||||
|
||||
|
|
|
|||
|
|
@ -45,7 +45,7 @@ enum CLike { One = 1, #[allow(dead_code)] Two = 2, }
|
|||
const TUPLE: (OND, OND) = (None, None);
|
||||
match (None, None) { TUPLE => dbg!(TUPLE), _ => panic!("whoops"), };
|
||||
|
||||
const TYPE_ASCRIPTION: OND = None: OND;
|
||||
const TYPE_ASCRIPTION: OND = type_ascribe!(None, OND);
|
||||
match None { TYPE_ASCRIPTION => dbg!(TYPE_ASCRIPTION), _ => panic!("whoops"), };
|
||||
|
||||
const ARRAY: [OND; 2] = [None, None];
|
||||
|
|
|
|||
|
|
@ -53,7 +53,7 @@ enum Derive<X> { Some(X), None, }
|
|||
match (None, Some(NoDerive)) { TUPLE => dbg!(TUPLE), _ => panic!("whoops"), };
|
||||
//~^ ERROR must be annotated with `#[derive(PartialEq, Eq)]`
|
||||
|
||||
const TYPE_ASCRIPTION: OND = Some(NoDerive): OND;
|
||||
const TYPE_ASCRIPTION: OND = type_ascribe!(Some(NoDerive), OND);
|
||||
match Some(NoDerive) { TYPE_ASCRIPTION => dbg!(TYPE_ASCRIPTION), _ => panic!("whoops"), };
|
||||
//~^ ERROR must be annotated with `#[derive(PartialEq, Eq)]`
|
||||
|
||||
|
|
|
|||
|
|
@ -1,7 +1,7 @@
|
|||
#![feature(type_ascription)]
|
||||
|
||||
enum Bug<S> { //~ ERROR parameter `S` is never used
|
||||
Var = 0: S,
|
||||
Var = type_ascribe!(0, S),
|
||||
//~^ ERROR generic parameters may not be used
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -1,8 +1,8 @@
|
|||
error: generic parameters may not be used in const operations
|
||||
--> $DIR/issue-67945-2.rs:4:14
|
||||
--> $DIR/issue-67945-2.rs:4:28
|
||||
|
|
||||
LL | Var = 0: S,
|
||||
| ^ cannot perform const operation using `S`
|
||||
LL | Var = type_ascribe!(0, S),
|
||||
| ^ cannot perform const operation using `S`
|
||||
|
|
||||
= note: type parameters may not be used in const expressions
|
||||
= help: use `#![feature(generic_const_exprs)]` to allow generic const expressions
|
||||
|
|
|
|||
|
|
@ -51,22 +51,13 @@ fn inside_if() -> u8 {
|
|||
|
||||
mod typeascription {
|
||||
fn outside() -> u8 {
|
||||
({ 0 }): u8
|
||||
}
|
||||
fn inside() -> u8 {
|
||||
({ 0 }: u8)
|
||||
type_ascribe!(({ 0 }), u8)
|
||||
}
|
||||
fn outside_match() -> u8 {
|
||||
(match 0 { x => x }): u8
|
||||
}
|
||||
fn inside_match() -> u8 {
|
||||
(match 0 { x => x }: u8)
|
||||
type_ascribe!((match 0 { x => x }), u8)
|
||||
}
|
||||
fn outside_if() -> u8 {
|
||||
(if false { 0 } else { 0 }): u8
|
||||
}
|
||||
fn inside_if() -> u8 {
|
||||
(if false { 0 } else { 0 }: u8)
|
||||
type_ascribe!((if false { 0 } else { 0 }), u8)
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -6,5 +6,5 @@
|
|||
fn main() {
|
||||
let x = [1, 2, 3];
|
||||
// The RHS should coerce to &[i32]
|
||||
let _y : &[i32] = &x : &[i32; 3];
|
||||
let _y : &[i32] = type_ascribe!(&x, &[i32; 3]);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -8,17 +8,17 @@
|
|||
type PairCoupledRegions<'a, T> = (&'a T, &'a T);
|
||||
|
||||
fn uncoupled_wilds_rhs<'a>(_x: &'a u32, s: &'static u32) -> &'static u32 {
|
||||
let ((y, _z),) = ((s, _x),): (PairUncoupled<_>,);
|
||||
let ((y, _z),) = type_ascribe!(((s, _x),), (PairUncoupled<_>,));
|
||||
y // OK
|
||||
}
|
||||
|
||||
fn coupled_wilds_rhs<'a>(_x: &'a u32, s: &'static u32) -> &'static u32 {
|
||||
let ((y, _z),) = ((s, _x),): (PairCoupledTypes<_>,);
|
||||
let ((y, _z),) = type_ascribe!(((s, _x),), (PairCoupledTypes<_>,));
|
||||
y //~ ERROR lifetime may not live long enough
|
||||
}
|
||||
|
||||
fn coupled_regions_rhs<'a>(_x: &'a u32, s: &'static u32) -> &'static u32 {
|
||||
let ((y, _z),) = ((s, _x),): (PairCoupledRegions<_>,);
|
||||
let ((y, _z),) = type_ascribe!(((s, _x),), (PairCoupledRegions<_>,));
|
||||
y //~ ERROR lifetime may not live long enough
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -3,7 +3,7 @@ error: lifetime may not live long enough
|
|||
|
|
||||
LL | fn coupled_wilds_rhs<'a>(_x: &'a u32, s: &'static u32) -> &'static u32 {
|
||||
| -- lifetime `'a` defined here
|
||||
LL | let ((y, _z),) = ((s, _x),): (PairCoupledTypes<_>,);
|
||||
LL | let ((y, _z),) = type_ascribe!(((s, _x),), (PairCoupledTypes<_>,));
|
||||
LL | y
|
||||
| ^ returning this value requires that `'a` must outlive `'static`
|
||||
|
||||
|
|
@ -12,7 +12,7 @@ error: lifetime may not live long enough
|
|||
|
|
||||
LL | fn coupled_regions_rhs<'a>(_x: &'a u32, s: &'static u32) -> &'static u32 {
|
||||
| -- lifetime `'a` defined here
|
||||
LL | let ((y, _z),) = ((s, _x),): (PairCoupledRegions<_>,);
|
||||
LL | let ((y, _z),) = type_ascribe!(((s, _x),), (PairCoupledRegions<_>,));
|
||||
LL | y
|
||||
| ^ returning this value requires that `'a` must outlive `'static`
|
||||
|
||||
|
|
|
|||
|
|
@ -3,5 +3,5 @@
|
|||
|
||||
fn main() {
|
||||
let x = 22_u32;
|
||||
let y: &u32 = &x: &'static u32; //~ ERROR E0597
|
||||
let y: &u32 = type_ascribe!(&x, &'static u32); //~ ERROR E0597
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,10 +1,10 @@
|
|||
error[E0597]: `x` does not live long enough
|
||||
--> $DIR/type_ascription_static_lifetime.rs:6:19
|
||||
--> $DIR/type_ascription_static_lifetime.rs:6:33
|
||||
|
|
||||
LL | let y: &u32 = &x: &'static u32;
|
||||
| ^^--------------
|
||||
| |
|
||||
| borrowed value does not live long enough
|
||||
LL | let y: &u32 = type_ascribe!(&x, &'static u32);
|
||||
| --------------^^---------------
|
||||
| | |
|
||||
| | borrowed value does not live long enough
|
||||
| type annotation requires that `x` is borrowed for `'static`
|
||||
LL | }
|
||||
| - `x` dropped here while still borrowed
|
||||
|
|
|
|||
|
|
@ -18,7 +18,7 @@ fn main() {
|
|||
let index_deref_ref = &raw const SLICE_REF[1];
|
||||
|
||||
let x = 0;
|
||||
let ascribe_ref = &raw const (x: i32);
|
||||
let ascribe_deref = &raw const (*ARRAY_REF: [i32; 2]);
|
||||
let ascribe_index_deref = &raw const (ARRAY_REF[0]: i32);
|
||||
let ascribe_ref = &raw const type_ascribe!(x, i32);
|
||||
let ascribe_deref = &raw const type_ascribe!(*ARRAY_REF, [i32; 2]);
|
||||
let ascribe_index_deref = &raw const type_ascribe!(ARRAY_REF[0], i32);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -8,24 +8,24 @@
|
|||
const ARRAY: [i32; 2] = [1, 2];
|
||||
|
||||
fn main() {
|
||||
let ref_expr = &raw const 2; //~ ERROR cannot take address
|
||||
let mut_ref_expr = &raw mut 3; //~ ERROR cannot take address
|
||||
let ref_const = &raw const FOUR; //~ ERROR cannot take address
|
||||
let mut_ref_const = &raw mut FOUR; //~ ERROR cannot take address
|
||||
let ref_expr = &raw const 2; //~ ERROR cannot take address
|
||||
let mut_ref_expr = &raw mut 3; //~ ERROR cannot take address
|
||||
let ref_const = &raw const FOUR; //~ ERROR cannot take address
|
||||
let mut_ref_const = &raw mut FOUR; //~ ERROR cannot take address
|
||||
|
||||
let field_ref_expr = &raw const (1, 2).0; //~ ERROR cannot take address
|
||||
let mut_field_ref_expr = &raw mut (1, 2).0; //~ ERROR cannot take address
|
||||
let field_ref = &raw const PAIR.0; //~ ERROR cannot take address
|
||||
let mut_field_ref = &raw mut PAIR.0; //~ ERROR cannot take address
|
||||
let field_ref_expr = &raw const (1, 2).0; //~ ERROR cannot take address
|
||||
let mut_field_ref_expr = &raw mut (1, 2).0; //~ ERROR cannot take address
|
||||
let field_ref = &raw const PAIR.0; //~ ERROR cannot take address
|
||||
let mut_field_ref = &raw mut PAIR.0; //~ ERROR cannot take address
|
||||
|
||||
let index_ref_expr = &raw const [1, 2][0]; //~ ERROR cannot take address
|
||||
let mut_index_ref_expr = &raw mut [1, 2][0]; //~ ERROR cannot take address
|
||||
let index_ref = &raw const ARRAY[0]; //~ ERROR cannot take address
|
||||
let mut_index_ref = &raw mut ARRAY[1]; //~ ERROR cannot take address
|
||||
let index_ref_expr = &raw const [1, 2][0]; //~ ERROR cannot take address
|
||||
let mut_index_ref_expr = &raw mut [1, 2][0]; //~ ERROR cannot take address
|
||||
let index_ref = &raw const ARRAY[0]; //~ ERROR cannot take address
|
||||
let mut_index_ref = &raw mut ARRAY[1]; //~ ERROR cannot take address
|
||||
|
||||
let ref_ascribe = &raw const (2: i32); //~ ERROR cannot take address
|
||||
let mut_ref_ascribe = &raw mut (3: i32); //~ ERROR cannot take address
|
||||
let ref_ascribe = &raw const type_ascribe!(2, i32); //~ ERROR cannot take address
|
||||
let mut_ref_ascribe = &raw mut type_ascribe!(3, i32); //~ ERROR cannot take address
|
||||
|
||||
let ascribe_field_ref = &raw const (PAIR.0: i32); //~ ERROR cannot take address
|
||||
let ascribe_index_ref = &raw mut (ARRAY[0]: i32); //~ ERROR cannot take address
|
||||
let ascribe_field_ref = &raw const type_ascribe!(PAIR.0, i32); //~ ERROR cannot take address
|
||||
let ascribe_index_ref = &raw mut type_ascribe!(ARRAY[0], i32); //~ ERROR cannot take address
|
||||
}
|
||||
|
|
|
|||
|
|
@ -73,26 +73,26 @@ LL | let mut_index_ref = &raw mut ARRAY[1];
|
|||
error[E0745]: cannot take address of a temporary
|
||||
--> $DIR/raw-ref-temp.rs:26:34
|
||||
|
|
||||
LL | let ref_ascribe = &raw const (2: i32);
|
||||
| ^^^^^^^^ temporary value
|
||||
LL | let ref_ascribe = &raw const type_ascribe!(2, i32);
|
||||
| ^^^^^^^^^^^^^^^^^^^^^ temporary value
|
||||
|
||||
error[E0745]: cannot take address of a temporary
|
||||
--> $DIR/raw-ref-temp.rs:27:36
|
||||
|
|
||||
LL | let mut_ref_ascribe = &raw mut (3: i32);
|
||||
| ^^^^^^^^ temporary value
|
||||
LL | let mut_ref_ascribe = &raw mut type_ascribe!(3, i32);
|
||||
| ^^^^^^^^^^^^^^^^^^^^^ temporary value
|
||||
|
||||
error[E0745]: cannot take address of a temporary
|
||||
--> $DIR/raw-ref-temp.rs:29:40
|
||||
|
|
||||
LL | let ascribe_field_ref = &raw const (PAIR.0: i32);
|
||||
| ^^^^^^^^^^^^^ temporary value
|
||||
LL | let ascribe_field_ref = &raw const type_ascribe!(PAIR.0, i32);
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ temporary value
|
||||
|
||||
error[E0745]: cannot take address of a temporary
|
||||
--> $DIR/raw-ref-temp.rs:30:38
|
||||
|
|
||||
LL | let ascribe_index_ref = &raw mut (ARRAY[0]: i32);
|
||||
| ^^^^^^^^^^^^^^^ temporary value
|
||||
LL | let ascribe_index_ref = &raw mut type_ascribe!(ARRAY[0], i32);
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ temporary value
|
||||
|
||||
error: aborting due to 16 previous errors
|
||||
|
||||
|
|
|
|||
|
|
@ -6,7 +6,7 @@
|
|||
|
||||
fn a() {
|
||||
// the cast is unreachable:
|
||||
let x = {return}: !; //~ ERROR unreachable
|
||||
let x = type_ascribe!({return}, !); //~ ERROR unreachable
|
||||
}
|
||||
|
||||
fn main() { }
|
||||
|
|
|
|||
|
|
@ -1,10 +1,10 @@
|
|||
error: unreachable expression
|
||||
--> $DIR/expr_type.rs:9:13
|
||||
|
|
||||
LL | let x = {return}: !;
|
||||
| ^------^^^^
|
||||
| ||
|
||||
| |any code following this expression is unreachable
|
||||
LL | let x = type_ascribe!({return}, !);
|
||||
| ^^^^^^^^^^^^^^^------^^^^^
|
||||
| | |
|
||||
| | any code following this expression is unreachable
|
||||
| unreachable expression
|
||||
|
|
||||
note: the lint level is defined here
|
||||
|
|
|
|||
|
|
@ -4,10 +4,10 @@
|
|||
|
||||
fn main() {
|
||||
let arr = &[1u8, 2, 3];
|
||||
let ref x = arr: &[u8]; //~ ERROR mismatched types
|
||||
let ref mut x = arr: &[u8]; //~ ERROR mismatched types
|
||||
match arr: &[u8] { //~ ERROR mismatched types
|
||||
let ref x = type_ascribe!(arr, &[u8]); //~ ERROR mismatched types
|
||||
let ref mut x = type_ascribe!(arr, &[u8]); //~ ERROR mismatched types
|
||||
match type_ascribe!(arr, &[u8]) { //~ ERROR mismatched types
|
||||
ref x => {}
|
||||
}
|
||||
let _len = (arr: &[u8]).len(); //~ ERROR mismatched types
|
||||
let _len = type_ascribe!(arr, &[u8]).len(); //~ ERROR mismatched types
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,35 +1,35 @@
|
|||
error[E0308]: mismatched types
|
||||
--> $DIR/type-ascription-soundness.rs:7:17
|
||||
--> $DIR/type-ascription-soundness.rs:7:31
|
||||
|
|
||||
LL | let ref x = arr: &[u8];
|
||||
| ^^^ expected slice `[u8]`, found array `[u8; 3]`
|
||||
LL | let ref x = type_ascribe!(arr, &[u8]);
|
||||
| ^^^ expected slice `[u8]`, found array `[u8; 3]`
|
||||
|
|
||||
= note: expected reference `&[u8]`
|
||||
found reference `&[u8; 3]`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/type-ascription-soundness.rs:8:21
|
||||
--> $DIR/type-ascription-soundness.rs:8:35
|
||||
|
|
||||
LL | let ref mut x = arr: &[u8];
|
||||
| ^^^ expected slice `[u8]`, found array `[u8; 3]`
|
||||
LL | let ref mut x = type_ascribe!(arr, &[u8]);
|
||||
| ^^^ expected slice `[u8]`, found array `[u8; 3]`
|
||||
|
|
||||
= note: expected reference `&[u8]`
|
||||
found reference `&[u8; 3]`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/type-ascription-soundness.rs:9:11
|
||||
--> $DIR/type-ascription-soundness.rs:9:25
|
||||
|
|
||||
LL | match arr: &[u8] {
|
||||
| ^^^ expected slice `[u8]`, found array `[u8; 3]`
|
||||
LL | match type_ascribe!(arr, &[u8]) {
|
||||
| ^^^ expected slice `[u8]`, found array `[u8; 3]`
|
||||
|
|
||||
= note: expected reference `&[u8]`
|
||||
found reference `&[u8; 3]`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/type-ascription-soundness.rs:12:17
|
||||
--> $DIR/type-ascription-soundness.rs:12:30
|
||||
|
|
||||
LL | let _len = (arr: &[u8]).len();
|
||||
| ^^^ expected slice `[u8]`, found array `[u8; 3]`
|
||||
LL | let _len = type_ascribe!(arr, &[u8]).len();
|
||||
| ^^^ expected slice `[u8]`, found array `[u8; 3]`
|
||||
|
|
||||
= note: expected reference `&[u8]`
|
||||
found reference `&[u8; 3]`
|
||||
|
|
|
|||
|
|
@ -8,32 +8,32 @@
|
|||
|
||||
use std::mem;
|
||||
|
||||
const C1: u8 = 10: u8;
|
||||
const C2: [u8; 1: usize] = [1];
|
||||
const C1: u8 = type_ascribe!(10, u8);
|
||||
const C2: [u8; type_ascribe!(1, usize)] = [1];
|
||||
|
||||
struct S {
|
||||
a: u8
|
||||
}
|
||||
|
||||
fn main() {
|
||||
assert_eq!(C1.into(): i32, 10);
|
||||
assert_eq!(type_ascribe!(C1.into(), i32), 10);
|
||||
assert_eq!(C2[0], 1);
|
||||
|
||||
let s = S { a: 10: u8 };
|
||||
let s = S { a: type_ascribe!(10, u8) };
|
||||
let arr = &[1u8, 2, 3];
|
||||
|
||||
let mut v = arr.iter().cloned().collect(): Vec<_>;
|
||||
let mut v = type_ascribe!(arr.iter().cloned().collect(), Vec<_>);
|
||||
v.push(4);
|
||||
assert_eq!(v, [1, 2, 3, 4]);
|
||||
|
||||
let a = 1: u8;
|
||||
let b = a.into(): u16;
|
||||
assert_eq!(v[a.into(): usize], 2);
|
||||
let a = type_ascribe!(1, u8);
|
||||
let b = type_ascribe!(a.into(), u16);
|
||||
assert_eq!(v[type_ascribe!(a.into(), usize)], 2);
|
||||
assert_eq!(mem::size_of_val(&a), 1);
|
||||
assert_eq!(mem::size_of_val(&b), 2);
|
||||
assert_eq!(b, 1: u16);
|
||||
assert_eq!(b, type_ascribe!(1, u16));
|
||||
|
||||
let mut v = Vec::new();
|
||||
v: Vec<u8> = vec![1, 2, 3]; // Place expression type ascription
|
||||
type_ascribe!(v, Vec<u8>) = vec![1, 2, 3]; // Place expression type ascription
|
||||
assert_eq!(v, [1u8, 2, 3]);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,5 +1,7 @@
|
|||
#![feature(type_ascription)]
|
||||
|
||||
fn main() {
|
||||
0: u8<e<5>=e>
|
||||
type_ascribe!(0, u8<e<5>=e>)
|
||||
//~^ ERROR: cannot find type `e` in this scope [E0412]
|
||||
//~| ERROR: associated type bindings are not allowed here [E0229]
|
||||
//~| ERROR: mismatched types [E0308]
|
||||
|
|
|
|||
|
|
@ -1,25 +1,22 @@
|
|||
error[E0412]: cannot find type `e` in this scope
|
||||
--> $DIR/issue-91267.rs:2:16
|
||||
--> $DIR/issue-91267.rs:4:30
|
||||
|
|
||||
LL | 0: u8<e<5>=e>
|
||||
| ^
|
||||
| |
|
||||
| not found in this scope
|
||||
| help: maybe you meant to write an assignment here: `let e`
|
||||
LL | type_ascribe!(0, u8<e<5>=e>)
|
||||
| ^ not found in this scope
|
||||
|
||||
error[E0229]: associated type bindings are not allowed here
|
||||
--> $DIR/issue-91267.rs:2:11
|
||||
--> $DIR/issue-91267.rs:4:25
|
||||
|
|
||||
LL | 0: u8<e<5>=e>
|
||||
| ^^^^^^ associated type not allowed here
|
||||
LL | type_ascribe!(0, u8<e<5>=e>)
|
||||
| ^^^^^^ associated type not allowed here
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/issue-91267.rs:2:5
|
||||
--> $DIR/issue-91267.rs:4:5
|
||||
|
|
||||
LL | fn main() {
|
||||
| - expected `()` because of default return type
|
||||
LL | 0: u8<e<5>=e>
|
||||
| ^^^^^^^^^^^^^ expected `()`, found `u8`
|
||||
LL | type_ascribe!(0, u8<e<5>=e>)
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `()`, found `u8`
|
||||
|
||||
error: aborting due to 3 previous errors
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue