[clang] [clang][ptrauth] Add support for querying the ptrauth schema of a type (PR #138482)

[Oliver Hunt via cfe-commits]

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@@ -9619,6 +9620,65 @@ ObjCInterfaceDecl *ASTContext::getObjCProtocolDecl() const {
   return ObjCProtocolClassDecl;
 }
 
+std::optional<PointerAuthQualifier>
+ASTContext::getExplicitOrImplicitPointerAuth(QualType T) {
+  auto ExplicitQualifier = T.getPointerAuth();
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ojhunt wrote:

goddammit.

I wonder if we can do something in clang-format that could identify `auto ... = <no explicit mention of type>` that would not be too noisy?

https://github.com/llvm/llvm-project/pull/138482