boost/callable_traits/remove_member_cv.hpp

0001 /*
0002
0003 @Copyright Barrett Adair 2015-2017
0004
0005 Distributed under the Boost Software License, Version 1.0.
0006 (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
0007
0008 */
0009
0010 #ifndef BOOST_CLBL_TRTS_REMOVE_MEMBER_CV_HPP
0011 #define BOOST_CLBL_TRTS_REMOVE_MEMBER_CV_HPP
0012
0013 #include <boost/callable_traits/detail/core.hpp>
0014
0015 namespace boost { namespace callable_traits {
0016
0017 //[ remove_member_cv_hpp
0018 /*`
0019 [section:ref_remove_member_cv remove_member_cv]
0020 [heading Header]
0021 ``#include <boost/callable_traits/remove_member_cv.hpp>``
0022 [heading Definition]
0023 */
0024
0025 template<typename T>
0026 using remove_member_cv_t = //see below
0027 //<-
0028     detail::try_but_fail_if_invalid<
0029         typename detail::traits<T>::remove_member_cv,
0030         member_qualifiers_are_illegal_for_this_type>;
0031
0032 namespace detail {
0033
0034     template<typename T, typename = std::false_type>
0035     struct remove_member_cv_impl {};
0036
0037     template<typename T>
0038     struct remove_member_cv_impl <T, typename std::is_same<
0039         remove_member_cv_t<T>, detail::dummy>::type>
0040     {
0041         using type = remove_member_cv_t<T>;
0042     };
0043 }
0044
0045 //->
0046
0047 template<typename T>
0048 struct remove_member_cv : detail::remove_member_cv_impl<T> {};
0049
0050 //<-
0051 }} // namespace boost::callable_traits
0052 //->
0053
0054 /*`
0055 [heading Constraints]
0056 * `T` must be a function type or a member function pointer type
0057 * If `T` is a pointer, it may not be cv/ref qualified
0058
0059 [heading Behavior]
0060 * A substitution failure occurs if the constraints are violated.
0061 * Removes member `const` and/or `volatile` qualifiers from `T`, if present.
0062
0063 [heading Input/Output Examples]
0064 [table
0065     [[`T`]                              [`remove_member_cv_t<T>`]]
0066     [[`int() const volatile`]           [`int()`]]
0067     [[`int(foo::*)() const volatile`]   [`int(foo::*)()`]]
0068     [[`int(foo::*)() volatile`]         [`int(foo::*)()`]]
0069     [[`int(foo::*)() const`]            [`int(foo::*)()`]]
0070     [[`int(foo::*)() const &`]          [`int(foo::*)() &`]]
0071     [[`int(foo::*)() const &&`]         [`int(foo::*)() &&`]]
0072     [[`int(foo::*)() const`]            [`int(foo::*)()`]]
0073     [[`int`]                            [(substitution failure)]]
0074     [[`int (&)()`]                      [(substitution failure)]]
0075     [[`int (*)()`]                      [(substitution failure)]]
0076     [[`int foo::*`]                     [(substitution failure)]]
0077     [[`int (foo::* const)()`]           [(substitution failure)]]
0078 ]
0079
0080 [heading Example Program]
0081 [import ../example/remove_member_cv.cpp]
0082 [remove_member_cv]
0083 [endsect]
0084 */
0085 //]
0086
0087 #endif // #ifndef BOOST_CLBL_TRTS_REMOVE_MEMBER_CV_HPP