When copy-initializing a temporary for a reference binding, don't allow use of

explicit constructors.

llvm-svn: 183879

1 files changed, 7 insertions, 0 deletions

diff --git a/clang/test/SemaCXX/references.cpp b/clang/test/SemaCXX/references.cpp
index 4f3dab0514b..37fc2a856fd 100644
--- a/clang/test/SemaCXX/references.cpp
+++ b/clang/test/SemaCXX/references.cpp
@@ -137,3 +137,10 @@ namespace PR8608 {
 
 // The following crashed trying to recursively evaluate the LValue.
 const int &do_not_crash = do_not_crash; // expected-warning{{reference 'do_not_crash' is not yet bound to a value when used within its own initialization}}
+
+namespace ExplicitRefInit {
+  // This is invalid: we can't copy-initialize an 'A' temporary using an
+  // explicit constructor.
+  struct A { explicit A(int); };
+  const A &a(0); // expected-error {{reference to type 'const ExplicitRefInit::A' could not bind to an rvalue of type 'int'}}
+}