Summary:
[[ https://bugs.llvm.org/show_bug.cgi?id=41549 | bug report ]]
Before this patch, implicit deduction guides were generated from the first declaration found by lookup.
With this patch implicit deduction guides are generated from the definition of the class template.
Also added test that was previously failing.
Reviewers: rsmith
Reviewed By: rsmith
Subscribers: cfe-commits, Quuxplusone
Tags: #clang
Differential Revision: https://reviews.llvm.org/D63072
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@363361
91177308-0d34-0410-b5e6-
96231b3b80d8
void Sema::DeclareImplicitDeductionGuides(TemplateDecl *Template,
SourceLocation Loc) {
+ if (CXXRecordDecl *DefRecord =
+ cast<CXXRecordDecl>(Template->getTemplatedDecl())->getDefinition()) {
+ TemplateDecl *DescribedTemplate = DefRecord->getDescribedClassTemplate();
+ Template = DescribedTemplate ? DescribedTemplate : Template;
+ }
+
DeclContext *DC = Template->getDeclContext();
if (DC->isDependentContext())
return;
}
#pragma clang diagnostic pop
+namespace PR41549 {
+
+template <class H, class P> struct umm;
+
+template <class H = int, class P = int>
+struct umm {
+ umm(H h = 0, P p = 0);
+};
+
+template <class H, class P> struct umm;
+
+umm m(1);
+
+}
+
#else
// expected-no-diagnostics