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Update CTFE to allow fns marked with the attr

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Deadbeef 2021-07-10 11:17:14 +08:00
parent 554fad7bda
commit 5e695bbba1
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1 changed files with 9 additions and 6 deletions
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15
compiler/rustc_mir/src/const_eval/machine.rs
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@ -235,12 +235,15 @@ impl<'mir, 'tcx> interpret::Machine<'mir, 'tcx> for CompileTimeInterpreter<'mir,
// sensitive check here. But we can at least rule out functions that are not const
// at all.
if !ecx.tcx.is_const_fn_raw(def.did) {
// Some functions we support even if they are non-const -- but avoid testing
// that for const fn!
ecx.hook_panic_fn(instance, args)?;
// We certainly do *not* want to actually call the fn
// though, so be sure we return here.
throw_unsup_format!("calling non-const function `{}`", instance)
// allow calling functions marked with #[default_method_body_is_const].
if !ecx.tcx.has_attr(def.did, sym::default_method_body_is_const) {
// Some functions we support even if they are non-const -- but avoid testing
// that for const fn!
ecx.hook_panic_fn(instance, args)?;
// We certainly do *not* want to actually call the fn
// though, so be sure we return here.
throw_unsup_format!("calling non-const function `{}`", instance)
}
}
}
// This is a const fn. Call it.