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Split some logic from a loop into a separate function

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This commit is contained in:
Oli Scherer 2022-05-16 14:23:52 +00:00
parent 340e708634
commit 14da30e3e6
1 changed files with 27 additions and 18 deletions
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15
compiler/rustc_infer/src/infer/canonical/query_response.rs
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@ -547,6 +547,16 @@ impl<'cx, 'tcx> InferCtxt<'cx, 'tcx> {
) -> impl Iterator<Item = PredicateObligation<'tcx>> + 'a + Captures<'tcx> {
unsubstituted_region_constraints.iter().map(move |&constraint| {
let predicate = substitute_value(self.tcx, result_subst, constraint);
self.query_outlives_constraint_to_obligation(predicate, cause.clone(), param_env)
})
}
pub fn query_outlives_constraint_to_obligation(
&self,
predicate: QueryOutlivesConstraint<'tcx>,
cause: ObligationCause<'tcx>,
param_env: ty::ParamEnv<'tcx>,
) -> Obligation<'tcx, ty::Predicate<'tcx>> {
let ty::OutlivesPredicate(k1, r2) = predicate.skip_binder();
let atom = match k1.unpack() {
@ -559,13 +569,12 @@ impl<'cx, 'tcx> InferCtxt<'cx, 'tcx> {
GenericArgKind::Const(..) => {
// Consts cannot outlive one another, so we don't expect to
// encounter this branch.
span_bug!(cause.span, "unexpected const outlives {:?}", constraint);
span_bug!(cause.span, "unexpected const outlives {:?}", predicate);
}
};
let predicate = predicate.rebind(atom).to_predicate(self.tcx);
Obligation::new(cause.clone(), param_env, predicate)
})
Obligation::new(cause, param_env, predicate)
}
/// Given two sets of values for the same set of canonical variables, unify them.