bjoernager/rust
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Add #![feature(const_fn_impl)]

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This commit is contained in:
Dylan MacKenzie 2020-10-02 12:02:41 -07:00
parent a1dfd2490a
commit e1d76818b2
3 changed files with 15 additions and 2 deletions
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13
compiler/rustc_mir/src/transform/check_consts/ops.rs
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@ -559,11 +559,20 @@ pub mod ty {
pub struct ImplTrait;
impl NonConstOp for ImplTrait {
fn status_in_item(&self, ccx: &ConstCx<'_, '_>) -> Status {
mcf_status_in_item(ccx)
if ccx.const_kind() != hir::ConstContext::ConstFn {
Status::Allowed
} else {
Status::Unstable(sym::const_fn_impl_trait)
}
}
fn build_error(&self, ccx: &ConstCx<'_, 'tcx>, span: Span) -> DiagnosticBuilder<'tcx> {
mcf_build_error(ccx, span, "`impl Trait` in const fn is unstable")
feature_err(
&ccx.tcx.sess.parse_sess,
sym::const_fn_impl_trait,
span,
&format!("`impl Trait` is not allowed in {}s", ccx.const_kind()),
)
}
}