/Src/Dependencies/Boost/boost/signals2/signal_type.hpp

http://hadesmem.googlecode.com/ · C++ Header · 144 lines · 109 code · 18 blank · 17 comment · 0 complexity · f89bbc178b11d431b01a69373a4bcc94 MD5 · raw file

  1. /*
  2. A meta function which supports using named template type parameters
  3. via Boost.Parameter to specify the template type parameters for
  4. the boost::signals2::signal class.
  5. Author: Frank Mori Hess <fmhess@users.sourceforge.net>
  6. Begin: 2009-01-22
  7. */
  8. // Copyright Frank Mori Hess 2009
  9. // Use, modification and
  10. // distribution is subject to the Boost Software License, Version
  11. // 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  12. // http://www.boost.org/LICENSE_1_0.txt)
  13. // For more information, see http://www.boost.org
  14. #ifndef BOOST_SIGNALS2_SIGNAL_TYPE_HPP
  15. #define BOOST_SIGNALS2_SIGNAL_TYPE_HPP
  16. // support for function types is currently broken in Boost.Parameter
  17. // #define BOOST_SIGNALS2_NAMED_SIGNATURE_PARAMETER
  18. #include <boost/signals2/signal.hpp>
  19. #if !defined(BOOST_PARAMETER_MAX_ARITY)
  20. #define BOOST_PARAMETER_MAX_ARITY 7
  21. #else
  22. #if BOOST_PARAMETER_MAX_ARITY < 7
  23. #error This header requires BOOST_PARAMETER_MAX_ARITY to be defined as 7 or greater prior to including Boost.Parameter headers
  24. #endif // BOOST_PARAMETER_MAX_ARITY < 7
  25. #endif // !defined(BOOST_PARAMETER_MAX_ARITY)
  26. #include <boost/parameter.hpp>
  27. #include <boost/type_traits/is_function.hpp>
  28. namespace boost
  29. {
  30. namespace signals2
  31. {
  32. namespace keywords
  33. {
  34. #ifdef BOOST_SIGNALS2_NAMED_SIGNATURE_PARAMETER
  35. BOOST_PARAMETER_TEMPLATE_KEYWORD(signature_type)
  36. #endif
  37. BOOST_PARAMETER_TEMPLATE_KEYWORD(combiner_type)
  38. BOOST_PARAMETER_TEMPLATE_KEYWORD(group_type)
  39. BOOST_PARAMETER_TEMPLATE_KEYWORD(group_compare_type)
  40. BOOST_PARAMETER_TEMPLATE_KEYWORD(slot_function_type)
  41. BOOST_PARAMETER_TEMPLATE_KEYWORD(extended_slot_function_type)
  42. BOOST_PARAMETER_TEMPLATE_KEYWORD(mutex_type)
  43. } // namespace keywords
  44. template <
  45. #ifdef BOOST_SIGNALS2_NAMED_SIGNATURE_PARAMETER
  46. typename A0,
  47. #else
  48. typename Signature,
  49. #endif
  50. typename A1 = parameter::void_,
  51. typename A2 = parameter::void_,
  52. typename A3 = parameter::void_,
  53. typename A4 = parameter::void_,
  54. typename A5 = parameter::void_,
  55. typename A6 = parameter::void_
  56. >
  57. class signal_type
  58. {
  59. typedef parameter::parameters<
  60. #ifdef BOOST_SIGNALS2_NAMED_SIGNATURE_PARAMETER
  61. parameter::required<keywords::tag::signature_type, is_function<boost::mpl::_> >,
  62. #endif
  63. parameter::optional<keywords::tag::combiner_type>,
  64. parameter::optional<keywords::tag::group_type>,
  65. parameter::optional<keywords::tag::group_compare_type>,
  66. parameter::optional<keywords::tag::slot_function_type>,
  67. parameter::optional<keywords::tag::extended_slot_function_type>,
  68. parameter::optional<keywords::tag::mutex_type>
  69. > parameter_spec;
  70. public:
  71. // ArgumentPack
  72. typedef typename
  73. parameter_spec::bind<
  74. #ifdef BOOST_SIGNALS2_NAMED_SIGNATURE_PARAMETER
  75. A0,
  76. #endif
  77. A1, A2, A3, A4, A5, A6>::type
  78. args;
  79. #ifdef BOOST_SIGNALS2_NAMED_SIGNATURE_PARAMETER
  80. typedef typename parameter::value_type<args, keywords::tag::signature_type>::type
  81. signature_type;
  82. #else
  83. typedef Signature signature_type;
  84. #endif
  85. typedef typename parameter::value_type
  86. <
  87. args,
  88. keywords::tag::combiner_type,
  89. optional_last_value
  90. <
  91. typename boost::function_traits<signature_type>::result_type
  92. >
  93. >::type combiner_type;
  94. typedef typename
  95. parameter::value_type<args, keywords::tag::group_type, int>::type group_type;
  96. typedef typename
  97. parameter::value_type<args, keywords::tag::group_compare_type, std::less<group_type> >::type
  98. group_compare_type;
  99. typedef typename
  100. parameter::value_type<args, keywords::tag::slot_function_type, function<signature_type> >::type
  101. slot_function_type;
  102. typedef typename
  103. parameter::value_type
  104. <
  105. args,
  106. keywords::tag::extended_slot_function_type,
  107. typename detail::extended_signature<function_traits<signature_type>::arity, signature_type>::function_type
  108. >::type
  109. extended_slot_function_type;
  110. typedef typename
  111. parameter::value_type<args, keywords::tag::mutex_type, mutex>::type mutex_type;
  112. typedef signal
  113. <
  114. signature_type,
  115. combiner_type,
  116. group_type,
  117. group_compare_type,
  118. slot_function_type,
  119. extended_slot_function_type,
  120. mutex_type
  121. > type;
  122. };
  123. } // namespace signals2
  124. } // namespace boost
  125. #endif // BOOST_SIGNALS2_SIGNAL_TYPE_HPP