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Rollup merge of #108161 - WaffleLapkin:const_param_ty, r=BoxyUwU

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Add `ConstParamTy` trait

This is a bit sketch, but idk.
r? `@BoxyUwU`

Yet to be done:
- [x] ~~Figure out if it's okay to implement `StructuralEq` for primitives / possibly remove their special casing~~ (it should be okay, but maybe not in this PR...)
- [ ] Maybe refactor the code a little bit
- [x] Use a macro to make impls a bit nicer

Future work:
- [ ] Actually™ use the trait when checking if a `const` generic type is allowed
- [ ] _Really_ refactor the surrounding code
- [ ] Refactor `marker.rs` into multiple modules for each "theme" of markers
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Dylan DPC 2023-05-02 11:44:50 +05:30 • committed by GitHub
commit b727132e23
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23 changed files with 672 additions and 178 deletions
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4
compiler/rustc_hir_analysis/messages.ftl
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@ -35,6 +35,10 @@ hir_analysis_field_already_declared =
hir_analysis_expected_used_symbol = expected `used`, `used(compiler)` or `used(linker)`
hir_analysis_const_param_ty_impl_on_non_adt =
the trait `ConstParamTy` may not be implemented for this type
.label = type is not a structure or enumeration
hir_analysis_ambiguous_lifetime_bound =
ambiguous lifetime bound, explicit lifetime bound required