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Rollup merge of #89029 - notriddle:notriddle/issue-89013, r=estebank

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feat(rustc_parse): recover from pre-RFC-2000 const generics syntax

Fixes #89013
This commit is contained in:
Manish Goregaokar 2021-10-01 09:18:17 -07:00 • committed by GitHub
commit 1708219940
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11 changed files with 180 additions and 6 deletions
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10
compiler/rustc_hir/src/hir.rs
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@ -384,6 +384,16 @@ impl GenericArgs<'_> {
self.args.iter().any(|arg| matches!(arg, GenericArg::Type(_)))
}
pub fn has_err(&self) -> bool {
self.args.iter().any(|arg| match arg {
GenericArg::Type(ty) => matches!(ty.kind, TyKind::Err),
_ => false,
}) || self.bindings.iter().any(|arg| match arg.kind {
TypeBindingKind::Equality { ty } => matches!(ty.kind, TyKind::Err),
_ => false,
})
}
#[inline]
pub fn num_type_params(&self) -> usize {
self.args.iter().filter(|arg| matches!(arg, GenericArg::Type(_))).count()