has_extension.c revision 5297d71e8c85f9b04dc31c690e91c6a2f7eddb90 
1// RUN: %clang_cc1 -E %s -o - | FileCheck --check-prefix=CHECK-PED-NONE %s
2// RUN: %clang_cc1 -pedantic-errors -E %s -o - | FileCheck --check-prefix=CHECK-PED-ERR %s
3
4// CHECK-PED-NONE: no_dummy_extension
5#if !__has_extension(dummy_extension)
6int no_dummy_extension();
7#endif
8
9// Arbitrary feature to test that has_extension is a superset of has_feature
10// CHECK-PED-NONE: attribute_overloadable
11#if __has_extension(attribute_overloadable)
12int attribute_overloadable();
13#endif
14
15// CHECK-PED-NONE: has_c_static_assert
16// CHECK-PED-ERR: no_c_static_assert
17#if __has_extension(c_static_assert)
18int has_c_static_assert();
19#else
20int no_c_static_assert();
21#endif
22
23// CHECK-PED-NONE: has_c_generic_selections
24// CHECK-PED-ERR: no_c_generic_selections
25#if __has_extension(c_generic_selections)
26int has_c_generic_selections();
27#else
28int no_c_generic_selections();
29#endif
30
31// CHECK-PED-NONE: has_c_alignas
32// CHECK-PED-ERR: no_c_alignas
33#if __has_extension(c_alignas)
34int has_c_alignas();
35#else
36int no_c_alignas();
37#endif
38
39// Arbitrary feature to test that the extension name can be surrounded with
40// double underscores.
41// CHECK-PED-NONE: has_double_underscores
42#if __has_extension(__c_alignas__)
43int has_double_underscores();
44#endif
45