================
@@ -1040,5 +1038,86 @@ bool isExpandedFromParameterPack(const ParmVarDecl *D) {
return getUnderlyingPackType(D) != nullptr;
}
+bool isLikelyForwardingFunction(const FunctionTemplateDecl *FT) {
+ const auto *FD = FT->getTemplatedDecl();
+ const auto NumParams = FD->getNumParams();
+ // Check whether its last parameter is a parameter pack...
+ if (NumParams > 0) {
+ const auto *LastParam = FD->getParamDecl(NumParams - 1);
+ if (const auto *PET = dyn_cast<PackExpansionType>(LastParam->getType())) {
+ // ... of the type T&&... or T...
+ const auto BaseType = PET->getPattern().getNonReferenceType();
+ if (const auto *TTPT =
+ dyn_cast<TemplateTypeParmType>(BaseType.getTypePtr())) {
+ // ... whose template parameter comes from the function directly
+ if (FT->getTemplateParameters()->getDepth() == TTPT->getDepth()) {
+ return true;
+ }
+ }
+ }
+ }
+ return false;
+}
+
+class ForwardingToConstructorVisitor
+ : public RecursiveASTVisitor<ForwardingToConstructorVisitor> {
+public:
+ struct SeenFunctions {
+ unsigned int DepthLeft;
+ SeenFunctions *Prev;
----------------
HighCommander4 wrote:
(In a [similar
place](https://searchfox.org/llvm/rev/4567327b9eac27d0979fe6fda31e7d5097cfb43a/clang-tools-extra/clangd/AST.cpp#1002)
we've used a set rather than a linked list for this sort of thing, but I guess
if the depth limit is 10 then a linear traversal is fine.)
https://github.com/llvm/llvm-project/pull/169742
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