expand_pack.hpp 8.7 KB

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  1. ///////////////////////////////////////////////////////////////////////////////
  2. /// \file expand_pack.hpp
  3. /// Contains helpers for pseudo-pack expansion.
  4. //
  5. // Copyright 2012 Eric Niebler. Distributed under the Boost
  6. // Software License, Version 1.0. (See accompanying file
  7. // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  8. template<typename Tfx, typename Ret >
  9. struct expand_pattern_helper<Tfx, Ret()>
  10. {
  11. typedef Ret (*type)();
  12. typedef mpl::bool_< false> applied;
  13. };
  14. template<typename Tfx, typename Ret , typename A0>
  15. struct expand_pattern_helper<Tfx, Ret(A0)>
  16. {
  17. typedef Ret (*type)(typename expand_pattern_helper<Tfx, A0>::type);
  18. typedef mpl::bool_<expand_pattern_helper<Tfx, A0>::applied::value || false> applied;
  19. };
  20. template<typename Tfx, typename Ret , typename A0 , typename A1>
  21. struct expand_pattern_helper<Tfx, Ret(A0 , A1)>
  22. {
  23. typedef Ret (*type)(typename expand_pattern_helper<Tfx, A0>::type , typename expand_pattern_helper<Tfx, A1>::type);
  24. typedef mpl::bool_<expand_pattern_helper<Tfx, A0>::applied::value || expand_pattern_helper<Tfx, A1>::applied::value || false> applied;
  25. };
  26. template<typename Tfx, typename Ret , typename A0 , typename A1 , typename A2>
  27. struct expand_pattern_helper<Tfx, Ret(A0 , A1 , A2)>
  28. {
  29. typedef Ret (*type)(typename expand_pattern_helper<Tfx, A0>::type , typename expand_pattern_helper<Tfx, A1>::type , typename expand_pattern_helper<Tfx, A2>::type);
  30. typedef mpl::bool_<expand_pattern_helper<Tfx, A0>::applied::value || expand_pattern_helper<Tfx, A1>::applied::value || expand_pattern_helper<Tfx, A2>::applied::value || false> applied;
  31. };
  32. template<typename Tfx, typename Ret , typename A0 , typename A1 , typename A2 , typename A3>
  33. struct expand_pattern_helper<Tfx, Ret(A0 , A1 , A2 , A3)>
  34. {
  35. typedef Ret (*type)(typename expand_pattern_helper<Tfx, A0>::type , typename expand_pattern_helper<Tfx, A1>::type , typename expand_pattern_helper<Tfx, A2>::type , typename expand_pattern_helper<Tfx, A3>::type);
  36. typedef mpl::bool_<expand_pattern_helper<Tfx, A0>::applied::value || expand_pattern_helper<Tfx, A1>::applied::value || expand_pattern_helper<Tfx, A2>::applied::value || expand_pattern_helper<Tfx, A3>::applied::value || false> applied;
  37. };
  38. template<typename Tfx, typename Ret , typename A0 , typename A1 , typename A2 , typename A3 , typename A4>
  39. struct expand_pattern_helper<Tfx, Ret(A0 , A1 , A2 , A3 , A4)>
  40. {
  41. typedef Ret (*type)(typename expand_pattern_helper<Tfx, A0>::type , typename expand_pattern_helper<Tfx, A1>::type , typename expand_pattern_helper<Tfx, A2>::type , typename expand_pattern_helper<Tfx, A3>::type , typename expand_pattern_helper<Tfx, A4>::type);
  42. typedef mpl::bool_<expand_pattern_helper<Tfx, A0>::applied::value || expand_pattern_helper<Tfx, A1>::applied::value || expand_pattern_helper<Tfx, A2>::applied::value || expand_pattern_helper<Tfx, A3>::applied::value || expand_pattern_helper<Tfx, A4>::applied::value || false> applied;
  43. };
  44. template<typename Tfx, typename Ret , typename A0 , typename A1 , typename A2 , typename A3 , typename A4 , typename A5>
  45. struct expand_pattern_helper<Tfx, Ret(A0 , A1 , A2 , A3 , A4 , A5)>
  46. {
  47. typedef Ret (*type)(typename expand_pattern_helper<Tfx, A0>::type , typename expand_pattern_helper<Tfx, A1>::type , typename expand_pattern_helper<Tfx, A2>::type , typename expand_pattern_helper<Tfx, A3>::type , typename expand_pattern_helper<Tfx, A4>::type , typename expand_pattern_helper<Tfx, A5>::type);
  48. typedef mpl::bool_<expand_pattern_helper<Tfx, A0>::applied::value || expand_pattern_helper<Tfx, A1>::applied::value || expand_pattern_helper<Tfx, A2>::applied::value || expand_pattern_helper<Tfx, A3>::applied::value || expand_pattern_helper<Tfx, A4>::applied::value || expand_pattern_helper<Tfx, A5>::applied::value || false> applied;
  49. };
  50. template<typename Tfx, typename Ret , typename A0 , typename A1 , typename A2 , typename A3 , typename A4 , typename A5 , typename A6>
  51. struct expand_pattern_helper<Tfx, Ret(A0 , A1 , A2 , A3 , A4 , A5 , A6)>
  52. {
  53. typedef Ret (*type)(typename expand_pattern_helper<Tfx, A0>::type , typename expand_pattern_helper<Tfx, A1>::type , typename expand_pattern_helper<Tfx, A2>::type , typename expand_pattern_helper<Tfx, A3>::type , typename expand_pattern_helper<Tfx, A4>::type , typename expand_pattern_helper<Tfx, A5>::type , typename expand_pattern_helper<Tfx, A6>::type);
  54. typedef mpl::bool_<expand_pattern_helper<Tfx, A0>::applied::value || expand_pattern_helper<Tfx, A1>::applied::value || expand_pattern_helper<Tfx, A2>::applied::value || expand_pattern_helper<Tfx, A3>::applied::value || expand_pattern_helper<Tfx, A4>::applied::value || expand_pattern_helper<Tfx, A5>::applied::value || expand_pattern_helper<Tfx, A6>::applied::value || false> applied;
  55. };
  56. template<typename Tfx, typename Ret , typename A0 , typename A1 , typename A2 , typename A3 , typename A4 , typename A5 , typename A6 , typename A7>
  57. struct expand_pattern_helper<Tfx, Ret(A0 , A1 , A2 , A3 , A4 , A5 , A6 , A7)>
  58. {
  59. typedef Ret (*type)(typename expand_pattern_helper<Tfx, A0>::type , typename expand_pattern_helper<Tfx, A1>::type , typename expand_pattern_helper<Tfx, A2>::type , typename expand_pattern_helper<Tfx, A3>::type , typename expand_pattern_helper<Tfx, A4>::type , typename expand_pattern_helper<Tfx, A5>::type , typename expand_pattern_helper<Tfx, A6>::type , typename expand_pattern_helper<Tfx, A7>::type);
  60. typedef mpl::bool_<expand_pattern_helper<Tfx, A0>::applied::value || expand_pattern_helper<Tfx, A1>::applied::value || expand_pattern_helper<Tfx, A2>::applied::value || expand_pattern_helper<Tfx, A3>::applied::value || expand_pattern_helper<Tfx, A4>::applied::value || expand_pattern_helper<Tfx, A5>::applied::value || expand_pattern_helper<Tfx, A6>::applied::value || expand_pattern_helper<Tfx, A7>::applied::value || false> applied;
  61. };
  62. template<typename Tfx, typename Ret , typename A0 , typename A1 , typename A2 , typename A3 , typename A4 , typename A5 , typename A6 , typename A7 , typename A8>
  63. struct expand_pattern_helper<Tfx, Ret(A0 , A1 , A2 , A3 , A4 , A5 , A6 , A7 , A8)>
  64. {
  65. typedef Ret (*type)(typename expand_pattern_helper<Tfx, A0>::type , typename expand_pattern_helper<Tfx, A1>::type , typename expand_pattern_helper<Tfx, A2>::type , typename expand_pattern_helper<Tfx, A3>::type , typename expand_pattern_helper<Tfx, A4>::type , typename expand_pattern_helper<Tfx, A5>::type , typename expand_pattern_helper<Tfx, A6>::type , typename expand_pattern_helper<Tfx, A7>::type , typename expand_pattern_helper<Tfx, A8>::type);
  66. typedef mpl::bool_<expand_pattern_helper<Tfx, A0>::applied::value || expand_pattern_helper<Tfx, A1>::applied::value || expand_pattern_helper<Tfx, A2>::applied::value || expand_pattern_helper<Tfx, A3>::applied::value || expand_pattern_helper<Tfx, A4>::applied::value || expand_pattern_helper<Tfx, A5>::applied::value || expand_pattern_helper<Tfx, A6>::applied::value || expand_pattern_helper<Tfx, A7>::applied::value || expand_pattern_helper<Tfx, A8>::applied::value || false> applied;
  67. };
  68. template<typename Tfx, typename Ret , typename A0 , typename A1 , typename A2 , typename A3 , typename A4 , typename A5 , typename A6 , typename A7 , typename A8 , typename A9>
  69. struct expand_pattern_helper<Tfx, Ret(A0 , A1 , A2 , A3 , A4 , A5 , A6 , A7 , A8 , A9)>
  70. {
  71. typedef Ret (*type)(typename expand_pattern_helper<Tfx, A0>::type , typename expand_pattern_helper<Tfx, A1>::type , typename expand_pattern_helper<Tfx, A2>::type , typename expand_pattern_helper<Tfx, A3>::type , typename expand_pattern_helper<Tfx, A4>::type , typename expand_pattern_helper<Tfx, A5>::type , typename expand_pattern_helper<Tfx, A6>::type , typename expand_pattern_helper<Tfx, A7>::type , typename expand_pattern_helper<Tfx, A8>::type , typename expand_pattern_helper<Tfx, A9>::type);
  72. typedef mpl::bool_<expand_pattern_helper<Tfx, A0>::applied::value || expand_pattern_helper<Tfx, A1>::applied::value || expand_pattern_helper<Tfx, A2>::applied::value || expand_pattern_helper<Tfx, A3>::applied::value || expand_pattern_helper<Tfx, A4>::applied::value || expand_pattern_helper<Tfx, A5>::applied::value || expand_pattern_helper<Tfx, A6>::applied::value || expand_pattern_helper<Tfx, A7>::applied::value || expand_pattern_helper<Tfx, A8>::applied::value || expand_pattern_helper<Tfx, A9>::applied::value || false> applied;
  73. };