@@ -3861,6 +3861,9 @@ diagnose_trait_expr (tree expr, tree args)
case CPTK_IS_TRIVIALLY_COPYABLE:
inform (loc, " %qT is not trivially copyable", t1);
break;
+ case CPTK_IS_UNBOUNDED_ARRAY:
+ inform (loc, " %qT is not an unbounded array", t1);
+ break;
case CPTK_IS_UNION:
inform (loc, " %qT is not a union", t1);
break;
@@ -92,6 +92,7 @@ DEFTRAIT_EXPR (IS_TRIVIAL, "__is_trivial", 1)
DEFTRAIT_EXPR (IS_TRIVIALLY_ASSIGNABLE, "__is_trivially_assignable", 2)
DEFTRAIT_EXPR (IS_TRIVIALLY_CONSTRUCTIBLE, "__is_trivially_constructible", -1)
DEFTRAIT_EXPR (IS_TRIVIALLY_COPYABLE, "__is_trivially_copyable", 1)
+DEFTRAIT_EXPR (IS_UNBOUNDED_ARRAY, "__is_unbounded_array", 1)
DEFTRAIT_EXPR (IS_UNION, "__is_union", 1)
DEFTRAIT_EXPR (IS_VOLATILE, "__is_volatile", 1)
DEFTRAIT_EXPR (REF_CONSTRUCTS_FROM_TEMPORARY, "__reference_constructs_from_temporary", 2)
@@ -12532,6 +12532,9 @@ trait_expr_value (cp_trait_kind kind, tree type1, tree type2)
case CPTK_IS_TRIVIALLY_COPYABLE:
return trivially_copyable_p (type1);
+ case CPTK_IS_UNBOUNDED_ARRAY:
+ return array_of_unknown_bound_p (type1);
+
case CPTK_IS_UNION:
return type_code1 == UNION_TYPE;
@@ -12708,6 +12711,7 @@ finish_trait_expr (location_t loc, cp_trait_kind kind, tree type1, tree type2)
case CPTK_IS_REFERENCE:
case CPTK_IS_SAME:
case CPTK_IS_SCOPED_ENUM:
+ case CPTK_IS_UNBOUNDED_ARRAY:
case CPTK_IS_UNION:
case CPTK_IS_VOLATILE:
break;
@@ -158,6 +158,9 @@
#if !__has_builtin (__is_trivially_copyable)
# error "__has_builtin (__is_trivially_copyable) failed"
#endif
+#if !__has_builtin (__is_unbounded_array)
+# error "__has_builtin (__is_unbounded_array) failed"
+#endif
#if !__has_builtin (__is_union)
# error "__has_builtin (__is_union) failed"
#endif
new file mode 100644
@@ -0,0 +1,37 @@
+// { dg-do compile { target c++11 } }
+
+#define SA(X) static_assert((X),#X)
+
+#define SA_TEST_CATEGORY(TRAIT, TYPE, EXPECT) \
+ SA(TRAIT(TYPE) == EXPECT); \
+ SA(TRAIT(const TYPE) == EXPECT); \
+ SA(TRAIT(volatile TYPE) == EXPECT); \
+ SA(TRAIT(const volatile TYPE) == EXPECT)
+
+class ClassType { };
+class IncompleteClass;
+union IncompleteUnion;
+
+SA_TEST_CATEGORY(__is_unbounded_array, int[2], false);
+SA_TEST_CATEGORY(__is_unbounded_array, int[], true);
+SA_TEST_CATEGORY(__is_unbounded_array, int[2][3], false);
+SA_TEST_CATEGORY(__is_unbounded_array, int[][3], true);
+SA_TEST_CATEGORY(__is_unbounded_array, float*[2], false);
+SA_TEST_CATEGORY(__is_unbounded_array, float*[], true);
+SA_TEST_CATEGORY(__is_unbounded_array, float*[2][3], false);
+SA_TEST_CATEGORY(__is_unbounded_array, float*[][3], true);
+SA_TEST_CATEGORY(__is_unbounded_array, ClassType[2], false);
+SA_TEST_CATEGORY(__is_unbounded_array, ClassType[], true);
+SA_TEST_CATEGORY(__is_unbounded_array, ClassType[2][3], false);
+SA_TEST_CATEGORY(__is_unbounded_array, ClassType[][3], true);
+SA_TEST_CATEGORY(__is_unbounded_array, IncompleteClass[2][3], false);
+SA_TEST_CATEGORY(__is_unbounded_array, IncompleteClass[][3], true);
+SA_TEST_CATEGORY(__is_unbounded_array, int(*)[2], false);
+SA_TEST_CATEGORY(__is_unbounded_array, int(*)[], false);
+SA_TEST_CATEGORY(__is_unbounded_array, int(&)[2], false);
+SA_TEST_CATEGORY(__is_unbounded_array, int(&)[], false);
+
+// Sanity check.
+SA_TEST_CATEGORY(__is_unbounded_array, ClassType, false);
+SA_TEST_CATEGORY(__is_unbounded_array, IncompleteClass, false);
+SA_TEST_CATEGORY(__is_unbounded_array, IncompleteUnion, false);