79 lines
1.5 KiB
C++
79 lines
1.5 KiB
C++
|
/*<-
|
||
|
|
Copyright Barrett Adair 2016-2017
|
||
|
|
Distributed under the Boost Software License, Version 1.0.
|
||
|
|
(See accompanying file LICENSE.md or copy at http ://boost.org/LICENSE_1_0.txt)
|
||
|
|
->*/
|
||
|
|
|
||
|
|
#include <boost/callable_traits/detail/config.hpp>
|
||
|
|
#ifdef BOOST_CLBL_TRTS_DISABLE_ABOMINABLE_FUNCTIONS
|
||
|
|
int main(){}
|
||
|
|
#else
|
||
|
|
|
||
|
|
//[ overview
|
||
|
|
#include <boost/callable_traits.hpp>
|
||
|
|
|
||
|
|
#include <type_traits>
|
||
|
|
#include <tuple>
|
||
|
|
|
||
|
|
using std::is_same;
|
||
|
|
using std::tuple;
|
||
|
|
|
||
|
|
using namespace boost::callable_traits;
|
||
|
|
|
||
|
|
struct number {
|
||
|
|
int value;
|
||
|
|
int add(int n) const { return value + n; }
|
||
|
|
};
|
||
|
|
|
||
|
|
using pmf = decltype(&number::add);
|
||
|
|
|
||
|
|
//` Manipulate member functions pointers with ease:
|
||
|
|
static_assert(is_same<
|
||
|
|
remove_member_const_t<pmf>,
|
||
|
|
int(number::*)(int)
|
||
|
|
>{}, "");
|
||
|
|
|
||
|
|
static_assert(is_same<
|
||
|
|
add_member_volatile_t<pmf>,
|
||
|
|
int(number::*)(int) const volatile
|
||
|
|
>{}, "");
|
||
|
|
|
||
|
|
static_assert(is_same<
|
||
|
|
class_of_t<pmf>,
|
||
|
|
number
|
||
|
|
>{}, "");
|
||
|
|
|
||
|
|
//` INVOKE-aware metafunctions:
|
||
|
|
|
||
|
|
static_assert(is_same<
|
||
|
|
args_t<pmf>,
|
||
|
|
tuple<const number&, int>
|
||
|
|
>{}, "");
|
||
|
|
|
||
|
|
static_assert(is_same<
|
||
|
|
return_type_t<pmf>,
|
||
|
|
int
|
||
|
|
>{}, "");
|
||
|
|
|
||
|
|
static_assert(is_same<
|
||
|
|
function_type_t<pmf>,
|
||
|
|
int(const number&, int)
|
||
|
|
>{}, "");
|
||
|
|
|
||
|
|
static_assert(is_same<
|
||
|
|
qualified_class_of_t<pmf>,
|
||
|
|
const number&
|
||
|
|
>{}, "");
|
||
|
|
|
||
|
|
//` Here are a few other trait examples:
|
||
|
|
static_assert(is_const_member<pmf>{}, "");
|
||
|
|
static_assert(!is_volatile_member<pmf>{}, "");
|
||
|
|
static_assert(!has_void_return<pmf>{}, "");
|
||
|
|
static_assert(!has_varargs<pmf>{}, "");
|
||
|
|
|
||
|
|
//]
|
||
|
|
|
||
|
|
int main() {}
|
||
|
|
|
||
|
|
#endif
|