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Rollup merge of #109506 - BoxyUwU:debugable_bound_var_printing, r=compiler-errors

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make param bound vars visibly bound vars with -Zverbose

I was trying to debug some type/const bound var stuff and it was shockingly tricky due to the fact that even with `-Zverbose` enabled the `T` in `for<T> T: Trait` prints as `T` making it seem like its `TyKind::Param` when it is infact `TyKind::Bound`. This PR "fixes" this when `-Zverbose` is set to allow rendering it as `^T` or `^1_T` depending on binder depth.

r? ```@compiler-errors```
This commit is contained in:
Matthias Krüger 2023-03-23 08:35:36 +01:00 committed by GitHub
commit 477ce585d4
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1 changed files with 5 additions and 1 deletions
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6
compiler/rustc_middle/src/ty/print/pretty.rs
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@ -704,7 +704,11 @@ pub trait PrettyPrinter<'tcx>:
ty::BoundTyKind::Anon(bv) => {
self.pretty_print_bound_var(debruijn, ty::BoundVar::from_u32(bv))?
}
ty::BoundTyKind::Param(_, s) => p!(write("{}", s)),
ty::BoundTyKind::Param(_, s) => match self.should_print_verbose() {
true if debruijn == ty::INNERMOST => p!(write("^{}", s)),
true => p!(write("^{}_{}", debruijn.index(), s)),
false => p!(write("{}", s)),
},
},
ty::Adt(def, substs) => {
p!(print_def_path(def.did(), substs));