bjoernager/rust
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Auto merge of #109119 - lcnr:trait-system-cleanup, r=compiler-errors

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a general type system cleanup

removes the helper functions `traits::fully_solve_X` as they add more complexity then they are worth. It's confusing which of these helpers should be used in which context.

changes the way we deal with overflow to always add depth in `evaluate_predicates_recursively`. It may make sense to actually fully transition to not have `recursion_depth` on obligations but that's probably a bit too much for this PR.

also removes some other small - and imo unnecessary - helpers.

r? types
This commit is contained in:
bors 2023-03-22 05:33:18 +00:00
commit 9bdb4881c7
39 changed files with 259 additions and 385 deletions
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7
compiler/rustc_const_eval/src/transform/check_consts/qualifs.rs
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@ -9,7 +9,7 @@ use rustc_middle::mir;
use rustc_middle::mir::*;
use rustc_middle::ty::{self, subst::SubstsRef, AdtDef, Ty};
use rustc_trait_selection::traits::{
self, ImplSource, Obligation, ObligationCause, SelectionContext,
self, ImplSource, Obligation, ObligationCause, ObligationCtxt, SelectionContext,
};
use super::ConstCx;
@ -184,7 +184,10 @@ impl Qualif for NeedsNonConstDrop {
}
// If we had any errors, then it's bad
!traits::fully_solve_obligations(&infcx, impl_src.nested_obligations()).is_empty()
let ocx = ObligationCtxt::new(&infcx);
ocx.register_obligations(impl_src.nested_obligations());
let errors = ocx.select_all_or_error();
!errors.is_empty()
}
fn in_adt_inherently<'tcx>(