[clang] [RFC] Initial implementation of P2719 (PR #113510)

[Oliver Hunt via cfe-commits]

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@@ -4749,6 +4753,15 @@ class Sema final : public SemaBase {
 
   CXXRecordDecl *getStdBadAlloc() const;
   EnumDecl *getStdAlignValT() const;
+  ClassTemplateDecl *getStdTypeIdentity() const;
+  std::optional<QualType> InstantiateSpecializedTypeIdentity(QualType Subject);
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ojhunt wrote:

Done.
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https://github.com/llvm/llvm-project/pull/113510