/Src/Dependencies/Boost/boost/multi_index/detail/prevent_eti.hpp

http://hadesmem.googlecode.com/ · C++ Header · 60 lines · 36 code · 13 blank · 11 comment · 0 complexity · de37469b33ac5504df5b2daef2a86c80 MD5 · raw file 

    

  1. /* Copyright 2003-2008 Joaquin M Lopez Munoz.
    2. 

  2.  * Distributed under the Boost Software License, Version 1.0.
    3. 

  3.  * (See accompanying file LICENSE_1_0.txt or copy at
    4. 

  4.  * http://www.boost.org/LICENSE_1_0.txt)
    5. 

  5.  *
    6. 

  6.  * See http://www.boost.org/libs/multi_index for library home page.
    7. 

  7.  */
    8. 

  8. 

  9. #ifndef BOOST_MULTI_INDEX_DETAIL_PREVENT_ETI_HPP
    10. 

  10. #define BOOST_MULTI_INDEX_DETAIL_PREVENT_ETI_HPP
    11. 

  11. 

  12. #if defined(_MSC_VER)&&(_MSC_VER>=1200)
    13. 

  13. #pragma once
    14. 

  14. #endif
    15. 

  15. 

  16. #include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
    17. 

  17. #include <boost/detail/workaround.hpp>
    18. 

  18. 

  19. #if BOOST_WORKAROUND(BOOST_MSVC,<1300)
    20. 

  20. #include <boost/mpl/if.hpp>
    21. 

  21. #include <boost/mpl/integral_c.hpp>
    22. 

  22. #include <boost/mpl/aux_/msvc_never_true.hpp>
    23. 

  23. #endif
    24. 

  24. 

  25. namespace boost{
    26. 

  26. 

  27. namespace multi_index{
    28. 

  28. 

  29. namespace detail{
    30. 

  30. 

  31. #if BOOST_WORKAROUND(BOOST_MSVC,<1300)
    32. 

  32. /* See
    33. 

  33.  * http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl?Effective_MPL
    34. 

  34.  * Item 5.6, Beware of the 'early template instantiation' trap.
    35. 

  35.  */
    36. 

  36. 

  37. template<typename Type,typename Construct>
    38. 

  38. struct prevent_eti
    39. 

  39. {
    40. 

  40.   typedef typename mpl::if_<
    41. 

  41.     mpl::aux::msvc_never_true<Type>,
    42. 

  42.     mpl::integral_c<int,0>,
    43. 

  43.     Construct
    44. 

  44.   >::type type;
    45. 

  45. };
    46. 

  46. #else
    47. 

  47. template<typename Type,typename Construct>
    48. 

  48. struct prevent_eti
    49. 

  49. {
    50. 

  50.   typedef Construct type;
    51. 

  51. };
    52. 

  52. #endif
    53. 

  53. 

  54. } /* namespace multi_index::detail */
    55. 

  55. 

  56. } /* namespace multi_index */
    57. 

  57. 

  58. } /* namespace boost */
    59. 

  59. 

  60. #endif
    61.