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Skip check for calling functions in same trait

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This commit is contained in:
Deadbeef 2021-07-07 11:52:40 +08:00
parent d8d4cc3b98
commit 56d79adf3b
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GPG Key ID: 6525773485376D92
2 changed files with 15 additions and 5 deletions
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8
compiler/rustc_mir/src/transform/check_consts/validation.rs
View File

@ -885,10 +885,18 @@ fn visit_terminator(&mut self, terminator: &Terminator<'tcx>, location: Location
return;
}
let caller_has_attr = tcx.has_attr(caller, sym::default_method_body_is_const);
let in_same_trait = match (tcx.trait_of_item(caller), tcx.trait_of_item(callee)) {
(Some(t1), Some(t2)) => t1 == t2,
_ => false
};
if !(caller_has_attr && in_same_trait) {
if !tcx.is_const_fn_raw(callee) {
self.check_op(ops::FnCallNonConst);
return;
}
}
// If the `const fn` we are trying to call is not const-stable, ensure that we have
// the proper feature gate enabled.

6
src/test/ui/rfc-2632-const-trait-impl/const-default-method-bodies.rs
View File

@ -1,6 +1,8 @@
// TODO fix this test
// check-pass
// TODO remove this^
#![feature(const_trait_impl)]
#![feature(const_fn_trait_bound)] // FIXME is this needed?
#![allow(incomplete_features)]
trait ConstDefaultFn: Sized {
@ -25,7 +27,7 @@ fn b(self) {}
const fn test() {
NonConstImpl.a();
//~^ ERROR calls in constant functions are limited to constant functions, tuple structs and tuple variants
// TODO ~^ ERROR calls in constant functions are limited to constant functions, tuple structs and tuple variants
ConstImpl.a();
}