bjoernager/rust
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Better error message in ed 2015

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This commit is contained in:
Michael Goulet 2024-01-26 17:15:43 +00:00
parent cd2fd34ca6
commit 54db272cc9
6 changed files with 76 additions and 24 deletions
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15
compiler/rustc_parse/src/parser/ty.rs
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@ -3,8 +3,8 @@ use super::{Parser, PathStyle, TokenType};
use crate::errors::{
self, DynAfterMut, ExpectedFnPathFoundFnKeyword, ExpectedMutOrConstInRawPointerType,
FnPointerCannotBeAsync, FnPointerCannotBeConst, FnPtrWithGenerics, FnPtrWithGenericsSugg,
InvalidDynKeyword, LifetimeAfterMut, NeedPlusAfterTraitObjectLifetime, NestedCVariadicType,
ReturnTypesUseThinArrow,
HelpUseLatestEdition, InvalidDynKeyword, LifetimeAfterMut, NeedPlusAfterTraitObjectLifetime,
NestedCVariadicType, ReturnTypesUseThinArrow,
};
use crate::{maybe_recover_from_interpolated_ty_qpath, maybe_whole};
@ -882,6 +882,17 @@ impl<'a> Parser<'a> {
let asyncness = if self.token.span.at_least_rust_2018() && self.eat_keyword(kw::Async) {
self.sess.gated_spans.gate(sym::async_closure, self.prev_token.span);
BoundAsyncness::Async(self.prev_token.span)
} else if self.may_recover()
&& self.token.span.is_rust_2015()
&& self.is_kw_followed_by_ident(kw::Async)
{
self.bump(); // eat `async`
self.dcx().emit_err(errors::AsyncBoundModifierIn2015 {
span: self.prev_token.span,
help: HelpUseLatestEdition::new(),
});
self.sess.gated_spans.gate(sym::async_closure, self.prev_token.span);
BoundAsyncness::Async(self.prev_token.span)
} else {
BoundAsyncness::Normal
};