diff options
Diffstat (limited to 'libcutl/meta/class-p.hxx')
-rw-r--r-- | libcutl/meta/class-p.hxx | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/libcutl/meta/class-p.hxx b/libcutl/meta/class-p.hxx new file mode 100644 index 0000000..fc7a111 --- /dev/null +++ b/libcutl/meta/class-p.hxx @@ -0,0 +1,26 @@ +// file : libcutl/meta/class-p.hxx +// license : MIT; see accompanying LICENSE file + +#ifndef LIBCUTL_META_CLASS_HXX +#define LIBCUTL_META_CLASS_HXX + +#include <libcutl/meta/answer.hxx> + +namespace cutl +{ + namespace meta + { + // g++ cannot have these inside class_p. + // + template <typename Y> no class_p_test (...); + template <typename Y> yes class_p_test (void (Y::*) ()); + + template <typename X> + struct class_p + { + static bool const r = sizeof (class_p_test<X> (0)) == sizeof (yes); + }; + } +} + +#endif // LIBCUTL_META_CLASS_HXX |