or.hpp

来自「正则表达式源代码」· HPP 代码 · 共 63 行

// preprocessed version of 'boost/mpl/aux_/config/use_preprocessed.hpp' header
// see the original for copyright information

namespace boost { namespace mpl {

namespace aux {

template< bool C_, typename T1, typename T2, typename T3, typename T4 >
struct or_impl
    : true_
{
};

template< typename T1, typename T2, typename T3, typename T4 >
struct or_impl< false,T1,T2,T3,T4 >
    : or_impl<
          BOOST_MPL_AUX_NESTED_TYPE_WKND(T1)::value
        , T2, T3, T4
        , false_
        >
{
};

template<>
struct or_impl<
          false
        , false_, false_, false_, false_
        >
    : false_
{
};

} // namespace aux

template<
      typename BOOST_MPL_AUX_VOID_SPEC_PARAM(T1)
    , typename BOOST_MPL_AUX_VOID_SPEC_PARAM(T2)
    , typename T3 = false_, typename T4 = false_, typename T5 = false_
    >
struct or_

    : aux::or_impl<
          BOOST_MPL_AUX_NESTED_TYPE_WKND(T1)::value
        , T2, T3, T4, T5
        >

{
    BOOST_MPL_AUX_LAMBDA_SUPPORT(
          5
        , or_
        , (T1, T2, T3, T4, T5)
        )
};

BOOST_MPL_AUX_VOID_SPEC_EXT(
      2
    , 5
    , or_
    )

}} // namespace boost::mpl