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Do not enforce ~const constness effects in typeck if rustc_do_not_const_check #132366

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Oct 31, 2024
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Do not enforce ~const constness effects in typeck if rustc_do_not_const_check #132366

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5 changes: 5 additions & 0 deletions compiler/rustc_hir_typeck/src/callee.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -851,6 +851,11 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
return;
}

// If we have `rustc_do_not_const_check`, do not check `~const` bounds.
if self.tcx.has_attr(self.body_id, sym::rustc_do_not_const_check) {
return;
}

let host = match self.tcx.hir().body_const_context(self.body_id) {
Some(hir::ConstContext::Const { .. } | hir::ConstContext::Static(_)) => {
ty::HostPolarity::Const
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3 changes: 2 additions & 1 deletion tests/ui/traits/const-traits/do-not-const-check.rs
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@@ -1,5 +1,6 @@
//@ check-pass
#![feature(const_trait_impl, rustc_attrs)]
#![feature(const_trait_impl, rustc_attrs, effects)]
//~^ WARN the feature `effects` is incomplete

#[const_trait]
trait IntoIter {
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11 changes: 11 additions & 0 deletions tests/ui/traits/const-traits/do-not-const-check.stderr
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@@ -0,0 +1,11 @@
warning: the feature `effects` is incomplete and may not be safe to use and/or cause compiler crashes
--> $DIR/do-not-const-check.rs:2:43
|
LL | #![feature(const_trait_impl, rustc_attrs, effects)]
| ^^^^^^^
|
= note: see issue #102090 <https://github.com/rust-lang/rust/issues/102090> for more information
= note: `#[warn(incomplete_features)]` on by default

warning: 1 warning emitted

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