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