Rollup merge of #123738 - spastorino:reuse-lower-const-param, r=compiler-errors

Call lower_const_param instead of duplicating the code

Follow up of #123689

r? `@oli-obk`

I had this commit in my old branch that I had forgotten about, `@fmease` pointed about this in #123689

I've left the branches that are not `Range` as do nothing as that's what we are currently doing but maybe we want to err or something.

compiler/rustc_hir_analysis/src/collect/resolve_bound_vars.rs

@@ -717,6 +717,11 @@ fn visit_ty(&mut self, ty: &'tcx hir::Ty<'tcx>) {
         }
     }
 
+    #[instrument(level = "debug", skip(self))]
+    fn visit_pattern_type_pattern(&mut self, p: &'tcx hir::Pat<'tcx>) {
+        intravisit::walk_pat(self, p)
+    }
+
     #[instrument(level = "debug", skip(self))]
     fn visit_trait_item(&mut self, trait_item: &'tcx hir::TraitItem<'tcx>) {
         use self::hir::TraitItemKind::*;

compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs

@@ -2234,11 +2234,7 @@ fn lower_ty_common(&self, hir_ty: &hir::Ty<'tcx>, borrowed: bool, in_path: bool)
                                         .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)
+                                    self.lower_const_param(expr.hir_id, ty)
                                 }
 
                                 _ => {