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Do not eagerly recover for bad impl-trait in macros

This commit is contained in:
Michael Goulet 2023-02-08 17:56:04 +00:00
parent bd39bbb4bb
commit 0017822b70
3 changed files with 35 additions and 2 deletions
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5
compiler/rustc_parse/src/parser/ty.rs
View File

@ -694,8 +694,9 @@ impl<'a> Parser<'a> {
// `where`, so stop if it's it.
// We also continue if we find types (not traits), again for error recovery.
while self.can_begin_bound()
|| self.token.can_begin_type()
|| (self.token.is_reserved_ident() && !self.token.is_keyword(kw::Where))
|| (self.may_recover()
&& (self.token.can_begin_type()
|| (self.token.is_reserved_ident() && !self.token.is_keyword(kw::Where))))
{
if self.token.is_keyword(kw::Dyn) {
// Account for `&dyn Trait + dyn Other`.

15
tests/ui/parser/bad-recover-kw-after-impl.rs Normal file
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@ -0,0 +1,15 @@
// check-pass
// edition:2021
// for the `impl` + keyword test
macro_rules! impl_primitive {
($ty:ty) => {
compile_error!("whoops");
};
(impl async) => {};
}
impl_primitive!(impl async);
fn main() {}

17
tests/ui/parser/bad-recover-ty-after-impl.rs Normal file
View File

@ -0,0 +1,17 @@
// check-pass
macro_rules! impl_primitive {
($ty:ty) => { impl_primitive!(impl $ty); };
(impl $ty:ty) => { fn a(_: $ty) {} }
}
impl_primitive! { u8 }
macro_rules! test {
($ty:ty) => { compile_error!("oh no"); };
(impl &) => {};
}
test!(impl &);
fn main() {}