[clang] [Clang] Added explanation why a is constructible evaluated to false. (PR #143309)

[Erich Keane via cfe-commits]

================
@@ -2253,6 +2260,53 @@ static void DiagnoseNonTriviallyCopyableReason(Sema &SemaRef,
   }
 }
 
+static void DiagnoseNonConstructibleReason(
+    Sema &SemaRef, SourceLocation Loc,
+    const llvm::SmallVector<clang::QualType, 1> &Ts) {
+  for (const auto &ArgTy : Ts) {
----------------
erichkeane wrote:

```suggestion
  for (const QualType &ArgTy : Ts) {
```

https://github.com/llvm/llvm-project/pull/143309