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Rollup merge of #123689 - spastorino:pattern_types_const_generics, r=oli-obk

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Add const generics support for pattern types

r? `@oli-obk`
This commit is contained in:
Guillaume Gomez 2024-04-10 16:15:24 +02:00 • committed by GitHub
commit 3f7ae6803b
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3 changed files with 37 additions and 2 deletions
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18
compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs
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@ -2223,6 +2223,24 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
Err(LitToConstError::TypeError) => todo!(),
}
}
hir::ExprKind::Path(hir::QPath::Resolved(
_,
&hir::Path {
res: Res::Def(DefKind::ConstParam, def_id), ..
},
)) => {
let ty = tcx
.type_of(def_id)
.no_bound_vars()
.expect("const parameter types cannot be generic");
let item_def_id = tcx.parent(def_id);
let generics = tcx.generics_of(item_def_id);
let index = generics.param_def_id_to_index[&def_id];
let name = tcx.item_name(def_id);
ty::Const::new_param(tcx, ty::ParamConst::new(index, name), ty)
}
_ => {
let err = tcx
.dcx()