/usr/include/boost/callable_traits
Edit: /usr/include/boost/callable_traits/args.hpp (3582B)
/*
@Copyright Barrett Adair 2015-2017
Distributed under the Boost Software License, Version 1.0.
(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
*/
#ifndef BOOST_CLBL_TRTS_ARGS_HPP
#define BOOST_CLBL_TRTS_ARGS_HPP
#include
namespace boost { namespace callable_traits {
//[ args_hpp
/*`[section:ref_args args]
[heading Header]
``#include ``
[heading Definition]
*/
template class Container = std::tuple>
using args_t = //see below
//<-
detail::try_but_fail_if_invalid<
typename detail::traits<
detail::shallow_decay>::template expand_args,
cannot_expand_the_parameter_list_of_first_template_argument>;
namespace detail {
template class Container,
typename = std::false_type>
struct args_impl {};
template class Container>
struct args_impl , detail::dummy>::type>
{
using type = args_t;
};
}
//->
template class Container = std::tuple>
struct args : detail::args_impl {};
//<-
}} // namespace boost::callable_traits
//->
/*`
[heading Constraints]
* `T` must be one of the following:
* function
* function pointer
* function reference
* member function pointer
* member data pointer
* user-defined type with a non-overloaded `operator()`
* type of a non-generic lambda
[heading Behavior]
* When the constraints are violated, a substitution failure occurs.
* When `T` is a function, function pointer, or function reference, the aliased type is `Container` instantiated with the function's parameter types.
* When `T` is a function object, the aliased type is `Container` instantiated with the `T::operator()` parameter types.
* When `T` is a member function pointer, the aliased type is a `Container` instantiation, where the first type argument is a reference to the parent class of `T`, qualified according to the member qualifiers on `T`, such that the first type is equivalent to `boost::callable_traits::qualified_class_of_t`. The subsequent type arguments, if any, are the parameter types of the member function.
* When `T` is a member data pointer, the aliased type is `Container` with a single element, which is a `const` reference to the parent class of `T`.
[heading Input/Output Examples]
[table
[[`T`] [`args_t`]]
[[`void(float, char, int)`] [`std::tuple`]]
[[`void(*)(float, char, int)`] [`std::tuple`]]
[[`void(*)()`] [`std::tuple<>`]]
[[`void(foo::* const &)(float, char, int)`] [`std::tuple`]]
[[`int(foo::*)(int) const`] [`std::tuple`]]
[[`void(foo::*)() volatile &&`] [`std::tuple`]]
[[`int foo::*`] [`std::tuple`]]
[[`const int foo::*`] [`std::tuple`]]
[[`int`] [(substitution failure)]]
[[`int (*const)()`] [(substitution failure)]]
]
[heading Example Program]
[import ../example/args.cpp]
[args]
[endsect]
*/
//]
#endif // #ifndef BOOST_CLBL_TRTS_ARGS_HPP