Auto merge of rust-lang#110031 - compiler-errors:generic-elaboration, r=b-naber

Make elaboration generic over input

Combines all the `elaborate_*` family of functions into just one, which is an iterator over the same type that you pass in (e.g. elaborating `Predicate` gives `Predicate`s, elaborating `Obligation`s gives `Obligation`s, etc.)

Author: bors

clippy_lints/src/needless_pass_by_value.rs

@@ -122,7 +122,7 @@ impl<'tcx> LateLintPass<'tcx> for NeedlessPassByValue {
 
         let sized_trait = need!(cx.tcx.lang_items().sized_trait());
 
-        let preds = traits::elaborate_predicates(cx.tcx, cx.param_env.caller_bounds().iter())
+        let preds = traits::elaborate(cx.tcx, cx.param_env.caller_bounds().iter())
             .filter(|p| !p.is_global())
             .filter_map(|pred| {
                 // Note that we do not want to deal with qualified predicates here.

clippy_utils/src/lib.rs

@@ -2104,7 +2104,7 @@ pub fn fn_has_unsatisfiable_preds(cx: &LateContext<'_>, did: DefId) -> bool {
         .filter_map(|(p, _)| if p.is_global() { Some(*p) } else { None });
     traits::impossible_predicates(
         cx.tcx,
-        traits::elaborate_predicates(cx.tcx, predicates)
+        traits::elaborate(cx.tcx, predicates)
             .collect::<Vec<_>>(),
     )
 }