bjoernager/rust
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must_not_suspend impl

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This commit is contained in:
Gus Wynn 2021-09-04 19:36:51 -07:00
parent 5d2a410ff7
commit 2271376fb2
19 changed files with 587 additions and 5 deletions
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16
compiler/rustc_passes/src/check_attr.rs
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@ -104,6 +104,7 @@ impl CheckAttrVisitor<'tcx> {
sym::default_method_body_is_const => {
self.check_default_method_body_is_const(attr, span, target)
}
sym::must_not_suspend => self.check_must_not_suspend(&attr, span, target),
sym::rustc_const_unstable
| sym::rustc_const_stable
| sym::unstable
@ -1014,6 +1015,21 @@ impl CheckAttrVisitor<'tcx> {
is_valid
}
/// Checks if `#[must_not_suspend]` is applied to a function. Returns `true` if valid.
fn check_must_not_suspend(&self, attr: &Attribute, span: &Span, target: Target) -> bool {
match target {
Target::Fn | Target::Method(..) | Target::ForeignFn | Target::Closure => {
self.tcx
.sess
.struct_span_err(attr.span, "`must_not_suspend` attribute should be applied to a struct, enum, `impl Trait`, or `dyn Trait`")
.span_label(*span, "is a function")
.emit();
false
}
_ => true,
}
}
/// Checks if `#[cold]` is applied to a non-function. Returns `true` if valid.
fn check_cold(&self, hir_id: HirId, attr: &Attribute, span: &Span, target: Target) {
match target {