[clang] [Clang][RFC] Bypass TAD during overload resolution if a perfect match exists (PR #133426)

[Erich Keane via cfe-commits]

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@@ -979,6 +1002,22 @@ class Sema;
       return false;
     }
 
+    // An overload is a perfect match if the conversion
+    // sequences for each argument are perfect.
+    bool isPerfectMatch(const ASTContext &Ctx) const {
+      if (!Viable)
+        return false;
+      for (const auto &C : Conversions) {
+        if (!C.isInitialized())
+          return false;
+        if (!C.isPerfect(Ctx))
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erichkeane wrote:

As a nit, putting these two in separate 'if' statements doesn't really improve readability for me, so `if (!C.isInitialized() || !C.isPerfect(Ctx)) return false; ` probably is just as good.

https://github.com/llvm/llvm-project/pull/133426