Define CONSTEXPR macro and use it in vec.h.

2017-05-18  Martin Liska  <mliska@suse.cz>

	* ansidecl.h: Define CONSTEXPR macro.
2017-05-18  Martin Liska  <mliska@suse.cz>

	* vec.h (struct vnull): Use it.

From-SVN: r248205

1 files changed, 1 insertions, 4 deletions

diff --git a/gcc/vec.h b/gcc/vec.h
index 914f89c..755a1f8 100644
--- a/gcc/vec.h
+++ b/gcc/vec.h
@@ -416,10 +416,7 @@ struct GTY((user)) vec
 struct vnull
 {
   template <typename T, typename A, typename L>
-#if __cpp_constexpr >= 200704
-  constexpr
-#endif
-  operator vec<T, A, L> () { return vec<T, A, L>(); }
+  CONSTEXPR operator vec<T, A, L> () { return vec<T, A, L>(); }
 };
 extern vnull vNULL;