================
@@ -507,10 +507,62 @@ static TemplateDeductionResult
DeduceNonTypeTemplateArgument(
S, TemplateParams, NTTP, DeducedTemplateArgument(New), T, Info, Deduced);
}
+static NamedDecl *DeduceTemplateArguments(Sema &S, NamedDecl *A,
+ TemplateArgument Default) {
+ switch (A->getKind()) {
+ case Decl::TemplateTypeParm: {
+ auto *T = cast<TemplateTypeParmDecl>(A);
+ // FIXME: DefaultArgument can't represent a pack.
+ if (T->isParameterPack())
----------------
mizvekov wrote:
It's possible to write code that hits this condition, in fact such code is
already in the clang test suite.
Currently the Decls for Type and Expr parameters don't store a whole
TemplateArgument for the default argument, in order to save a few bytes, they
store only a TSI and Expr* respectively, which doesn't cover the Pack case.
https://github.com/llvm/llvm-project/pull/89807
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