bjoernager/rust
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Rollup merge of #108010 - compiler-errors:can_eq-returns-bool, r=lcnr

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Make `InferCtxt::can_eq` and `InferCtxt::can_sub` return booleans

Nobody matches on the result, nor does the result return anything useful...
This commit is contained in:
Matthias Krüger 2023-02-15 21:30:56 +01:00 • committed by GitHub
commit 8f65e25aec
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13 changed files with 33 additions and 43 deletions
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18
compiler/rustc_infer/src/infer/mod.rs
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@ -880,30 +880,20 @@ impl<'tcx> InferCtxt<'tcx> {
self.inner.borrow_mut().unwrap_region_constraints().add_given(sub, sup);
}
pub fn can_sub<T>(&self, param_env: ty::ParamEnv<'tcx>, a: T, b: T) -> UnitResult<'tcx>
pub fn can_sub<T>(&self, param_env: ty::ParamEnv<'tcx>, a: T, b: T) -> bool
where
T: at::ToTrace<'tcx>,
{
let origin = &ObligationCause::dummy();
self.probe(|_| {
self.at(origin, param_env).sub(a, b).map(|InferOk { obligations: _, .. }| {
// Ignore obligations, since we are unrolling
// everything anyway.
})
})
self.probe(|_| self.at(origin, param_env).sub(a, b).is_ok())
}
pub fn can_eq<T>(&self, param_env: ty::ParamEnv<'tcx>, a: T, b: T) -> UnitResult<'tcx>
pub fn can_eq<T>(&self, param_env: ty::ParamEnv<'tcx>, a: T, b: T) -> bool
where
T: at::ToTrace<'tcx>,
{
let origin = &ObligationCause::dummy();
self.probe(|_| {
self.at(origin, param_env).eq(a, b).map(|InferOk { obligations: _, .. }| {
// Ignore obligations, since we are unrolling
// everything anyway.
})
})
self.probe(|_| self.at(origin, param_env).eq(a, b).is_ok())
}
#[instrument(skip(self), level = "debug")]