================
@@ -313,9 +313,75 @@ Response HandleRecordDecl(const CXXRecordDecl *Rec,
// This is to make sure we pick up the VarTemplateSpecializationDecl that
this
// lambda is defined inside of.
- if (Rec->isLambda())
+ if (Rec->isLambda()) {
if (const Decl *LCD = Rec->getLambdaContextDecl())
return Response::ChangeDecl(LCD);
+ // Attempt to retrieve the template arguments for a using alias
declaration.
+ // This is necessary for constraint checking, since we always keep
+ // constraints relative to the primary template.
+ if (ForConstraintInstantiation && !SemaRef.CodeSynthesisContexts.empty()) {
----------------
cor3ntin wrote:
```suggestion
if (ForConstraintInstantiation) {
```
https://github.com/llvm/llvm-project/pull/82310
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