[clang] [clang-tools-extra] [clang][Sema] Unify getPrototypeLoc helpers in SemaCodeComplete and clangd (PR #143345)

[Nathan Ridge via cfe-commits]

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@@ -93,6 +94,12 @@ class HeuristicResolver {
   // during simplification, and the operation fails if no pointer type is found.
   QualType simplifyType(QualType Type, const Expr *E, bool UnwrapPointer);
 
+  // Given an expression `Fn` representing the callee in a function call,
+  // if the call is through a function pointer, try to find the declaration of
+  // the corresponding function pointer type, so that we can recover argument
+  // names from it.
+  FunctionProtoTypeLoc getProtoTypeLoc(const Expr *Fn) const;
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HighCommander4 wrote:

Renamed.

https://github.com/llvm/llvm-project/pull/143345