ceph/src/boost/boost/callable_traits/remove_transaction_safe.hpp

   1 /*
   2 @file remove_transaction_safe
   3
   4 @Copyright Barrett Adair 2015-2017
   5 Distributed under the Boost Software License, Version 1.0.
   6 (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
   7
   8 */
   9
  10 #ifndef BOOST_CLBL_TRTS_REMOVE_TRANSACTION_SAFE_HPP
  11 #define BOOST_CLBL_TRTS_REMOVE_TRANSACTION_SAFE_HPP
  12
  13 #include <boost/callable_traits/detail/core.hpp>
  14
  15 namespace boost { namespace callable_traits {
  16
  17 BOOST_CLBL_TRTS_DEFINE_SFINAE_ERROR_ORIGIN(remove_transaction_safe)
  18 BOOST_CLBL_TRTS_SFINAE_MSG(remove_transaction_safe, cannot_remove_transaction_safe_from_this_type)
  19
  20 //[ remove_transaction_safe_hpp
  21 /*`
  22 [section:ref_remove_transaction_safe remove_transaction_safe]
  23 [heading Header]
  24 ``#include <boost/callable_traits/remove_transaction_safe.hpp>``
  25 [heading Definition]
  26 */
  27
  28 template<typename T>
  29 using remove_transaction_safe_t = //see below
  30 //<-
  31     detail::try_but_fail_if_invalid<
  32         typename detail::traits<T>::remove_transaction_safe,
  33         cannot_remove_transaction_safe_from_this_type>;
  34
  35 namespace detail {
  36
  37     template<typename T, typename = std::false_type>
  38     struct remove_transaction_safe_impl {};
  39
  40     template<typename T>
  41     struct remove_transaction_safe_impl <T, typename std::is_same<
  42         remove_transaction_safe_t<T>, detail::dummy>::type>
  43     {
  44         using type = remove_transaction_safe_t<T>;
  45     };
  46 }
  47
  48 //->
  49
  50 template<typename T>
  51 struct remove_transaction_safe : detail::remove_transaction_safe_impl<T> {};
  52
  53 //<-
  54 }} // namespace boost::callable_traits
  55 //->
  56
  57 /*`
  58
  59 [heading Constraints]
  60 * `T` must be one of the following:
  61   * function type
  62   * function pointer type
  63   * function reference type
  64   * member function pointer type
  65 * If `T` is a pointer, it may not be cv/ref qualified
  66
  67 [heading Behavior]
  68 * A substitution failure occurs if the constraints are violated.
  69 * Removes the member `transaction_safe` specifier from `T`, if present.
  70
  71 [heading Input/Output Examples]
  72 [table
  73     [[`T`]                              [`remove_transaction_safe_t<T>`]]
  74     [[`int() const transaction_safe`]   [`int() const`]]
  75     [[`int(*)() transaction_safe`]      [`int(*)()`]]
  76     [[`int(&)() transaction_safe`]      [`int(&)()`]]
  77     [[`int(foo::*)() transaction_safe`] [`int(foo::*)()`]]
  78     [[`int() const`]                    [`int() const`]]
  79     [[`int(*)()`]                       [`int(*)()`]]
  80     [[`int(&)()`]                       [`int(&)()`]]
  81     [[`int`]                            [(substitution failure)]]
  82     [[`int foo::*`]                     [(substitution failure)]]
  83     [[`int (foo::* const)()`]           [(substitution failure)]]
  84 ]
  85
  86 [heading Example Program]
  87 [import ../example/remove_transaction_safe.cpp]
  88 [remove_transaction_safe]
  89 [endsect]
  90 */
  91 //]
  92
  93 #endif // #ifndef BOOST_CLBL_TRTS_REMOVE_TRANSACTION_SAFE_HPP