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extend polymorphization hack comment.

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lcnr 2022-09-19 11:44:29 +02:00
parent 647052fc04
commit 0c3e01d8f6
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compiler/rustc_middle/src/ty/layout.rs
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@ -2767,6 +2767,8 @@ impl<'tcx> ty::Instance<'tcx> {
// (i.e. due to being inside a projection that got normalized, see // (i.e. due to being inside a projection that got normalized, see
// `src/test/ui/polymorphization/normalized_sig_types.rs`), and codegen not keeping // `src/test/ui/polymorphization/normalized_sig_types.rs`), and codegen not keeping
// track of a polymorphization `ParamEnv` to allow normalizing later. // track of a polymorphization `ParamEnv` to allow normalizing later.
//
// We normalize the `fn_sig` again after substituting at a later point.
let mut sig = match *ty.kind() { let mut sig = match *ty.kind() {
ty::FnDef(def_id, substs) => tcx ty::FnDef(def_id, substs) => tcx
.bound_fn_sig(def_id) .bound_fn_sig(def_id)