| 1 | /*<- |
|---|
| 2 | Copyright Barrett Adair 2016-2017 |
|---|
| 3 | Distributed under the Boost Software License, Version 1.0. |
|---|
| 4 | (See accompanying file LICENSE.md or copy at http ://boost.org/LICENSE_1_0.txt) |
|---|
| 5 | ->*/ |
|---|
| 6 | |
|---|
| 7 | #include <boost/callable_traits/detail/config.hpp> |
|---|
| 8 | #ifdef BOOST_CLBL_TRTS_DISABLE_ABOMINABLE_FUNCTIONS |
|---|
| 9 | int main(){} |
|---|
| 10 | #else |
|---|
| 11 | |
|---|
| 12 | //[ overview |
|---|
| 13 | #include <boost/callable_traits.hpp> |
|---|
| 14 | |
|---|
| 15 | #include <type_traits> |
|---|
| 16 | #include <tuple> |
|---|
| 17 | |
|---|
| 18 | using std::is_same; |
|---|
| 19 | using std::tuple; |
|---|
| 20 | |
|---|
| 21 | using namespace boost::callable_traits; |
|---|
| 22 | |
|---|
| 23 | struct number { |
|---|
| 24 | int value; |
|---|
| 25 | int add(int n) const { return value + n; } |
|---|
| 26 | }; |
|---|
| 27 | |
|---|
| 28 | using pmf = decltype(&number::add); |
|---|
| 29 | |
|---|
| 30 | //` Manipulate member functions pointers with ease: |
|---|
| 31 | static_assert(is_same< |
|---|
| 32 | remove_member_const_t<pmf>, |
|---|
| 33 | int(number::*)(int) |
|---|
| 34 | >{}, "" ); |
|---|
| 35 | |
|---|
| 36 | static_assert(is_same< |
|---|
| 37 | add_member_volatile_t<pmf>, |
|---|
| 38 | int(number::*)(int) const volatile |
|---|
| 39 | >{}, "" ); |
|---|
| 40 | |
|---|
| 41 | static_assert(is_same< |
|---|
| 42 | class_of_t<pmf>, |
|---|
| 43 | number |
|---|
| 44 | >{}, "" ); |
|---|
| 45 | |
|---|
| 46 | //` INVOKE-aware metafunctions: |
|---|
| 47 | |
|---|
| 48 | static_assert(is_same< |
|---|
| 49 | args_t<pmf>, |
|---|
| 50 | tuple<const number&, int> |
|---|
| 51 | >{}, "" ); |
|---|
| 52 | |
|---|
| 53 | static_assert(is_same< |
|---|
| 54 | return_type_t<pmf>, |
|---|
| 55 | int |
|---|
| 56 | >{}, "" ); |
|---|
| 57 | |
|---|
| 58 | static_assert(is_same< |
|---|
| 59 | function_type_t<pmf>, |
|---|
| 60 | int(const number&, int) |
|---|
| 61 | >{}, "" ); |
|---|
| 62 | |
|---|
| 63 | static_assert(is_same< |
|---|
| 64 | qualified_class_of_t<pmf>, |
|---|
| 65 | const number& |
|---|
| 66 | >{}, "" ); |
|---|
| 67 | |
|---|
| 68 | //` Here are a few other trait examples: |
|---|
| 69 | static_assert(is_const_member<pmf>{}, "" ); |
|---|
| 70 | static_assert(!is_volatile_member<pmf>{}, "" ); |
|---|
| 71 | static_assert(!has_void_return<pmf>{}, "" ); |
|---|
| 72 | static_assert(!has_varargs<pmf>{}, "" ); |
|---|
| 73 | |
|---|
| 74 | //] |
|---|
| 75 | |
|---|
| 76 | int main() {} |
|---|
| 77 | |
|---|
| 78 | #endif |
|---|
| 79 | |
|---|
