[clang] [lldb] [clang]: support std::meta::info for primitive types (PR #190356)

[Shafik Yaghmour via cfe-commits]

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@@ -494,6 +500,61 @@ static void profileIntValue(llvm::FoldingSetNodeID &ID, const llvm::APInt &V) {
     ID.AddInteger((uint32_t)V.extractBitsAsZExtValue(std::min(32u, N - I), I));
 }
 
+/// Unwrap reflected type for profiling
+static QualType unwrapReflectedTypeForProfile(QualType QT) {
+
+  // TODO(Reflection)
+
+  /// [expr.reflect] p5, if a reflect-expression R matches the form ^^reflection-name
+  /// it is interpreted as such; the identifier is looked up and the representation of R is determined as follows:
+  /// - if lookup fines a type alias A, R represents the type the underlying entity of A if A
+  ///   was introduced by the declaration of a template parameter; otherwise, R represents A.
+
+  /// [expr.reflect] p6, Given reflect-expression R of the form ^^type-id,
+  /// if type-id is neither a placeholder type nor in the form of nested-name-specifier_opt template_opt simple-template-id
+  /// then R represents the type denoted by the type-id
+
+  bool IsConst = QT.isConstQualified();
+  bool IsVolatile = QT.isVolatileQualified();
+  bool UnwrapAliases = (IsConst || IsVolatile);
+
+  void *AsPtr;
+  do {
+    AsPtr = QT.getAsOpaquePtr();
+    if (const auto *DTT = dyn_cast<DecltypeType>(QT)) {
+      QT = DTT->desugar();
+      UnwrapAliases = true;
+    }
+    if (const auto *UT = dyn_cast<UsingType>(QT); UT && UnwrapAliases)
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shafik wrote:

Should this be else if?

https://github.com/llvm/llvm-project/pull/190356