1 files changed, 14 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/g++.dg/cpp0x/constexpr-ptrsub.C b/gcc-4.9/gcc/testsuite/g++.dg/cpp0x/constexpr-ptrsub.C
new file mode 100644
index 0000000..18648d9
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/g++.dg/cpp0x/constexpr-ptrsub.C
@@ -0,0 +1,14 @@
+// PR c++/51489
+// DR 1313
+// { dg-do compile { target c++11 } }
+
+struct array
+{
+  constexpr array() :x(0) {}
+  constexpr int const* begin() { return &x; }
+  int x;
+};
+constexpr array aa;
+constexpr auto b = aa.begin();
+static_assert(b-b == 0, "compiles just fine");
+static_assert(aa.begin()-aa.begin() == 0, "compiler thinks it's not a constant expression");