When instantiating a deduction guide, transform its name.

Otherwise it will serve as a deduction guide for the wrong class template.

llvm-svn: 321297

1 files changed, 13 insertions, 0 deletions

diff --git a/clang/test/SemaTemplate/nested-deduction-guides.cpp b/clang/test/SemaTemplate/nested-deduction-guides.cpp
new file mode 100644
index 00000000000..2c5dda456a1
--- /dev/null
+++ b/clang/test/SemaTemplate/nested-deduction-guides.cpp
@@ -0,0 +1,13 @@
+// RUN: %clang_cc1 -std=c++17 -verify %s
+// expected-no-diagnostics
+
+template<typename T> struct A {
+  template<typename U> struct B {
+    B(...);
+  };
+  template<typename U> B(U) -> B<U>;
+};
+A<void>::B b = 123;
+
+using T = decltype(b);
+using T = A<void>::B<int>;