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Diffstat (limited to '3rdParty/Boost/src/boost/proto/transform/detail/when.hpp')
| -rw-r--r-- | 3rdParty/Boost/src/boost/proto/transform/detail/when.hpp | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/proto/transform/detail/when.hpp b/3rdParty/Boost/src/boost/proto/transform/detail/when.hpp new file mode 100644 index 0000000..1362107 --- /dev/null +++ b/3rdParty/Boost/src/boost/proto/transform/detail/when.hpp @@ -0,0 +1,101 @@ +#if !defined(BOOST_PROTO_DONT_USE_PREPROCESSED_FILES) + + #include <boost/proto/transform/detail/preprocessed/when.hpp> + +#elif !defined(BOOST_PP_IS_ITERATING) + + #if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES) + #pragma wave option(preserve: 2, line: 0, output: "preprocessed/when.hpp") + #endif + + /////////////////////////////////////////////////////////////////////////////// + /// \file when.hpp + /// Definition of when transform. + // + // Copyright 2008 Eric Niebler. Distributed under the Boost + // Software License, Version 1.0. (See accompanying file + // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) + + #if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES) + #pragma wave option(preserve: 1) + #endif + + #define BOOST_PP_ITERATION_PARAMS_1 \ + (3, (0, BOOST_PROTO_MAX_ARITY, <boost/proto/transform/detail/when.hpp>)) + #include BOOST_PP_ITERATE() + + #if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES) + #pragma wave option(output: null) + #endif + +#else + + #define N BOOST_PP_ITERATION() + + /// \brief A grammar element and a PrimitiveTransform that associates + /// a transform with the grammar. + /// + /// Use <tt>when\<\></tt> to override a grammar's default transform + /// with a custom transform. It is for used when composing larger + /// transforms by associating smaller transforms with individual + /// rules in your grammar, as in the following transform which + /// counts the number of terminals in an expression. + /// + /// \code + /// // Count the terminals in an expression tree. + /// // Must be invoked with initial state == mpl::int_<0>(). + /// struct CountLeaves + /// : or_< + /// when<terminal<_>, mpl::next<_state>()> + /// , otherwise<fold<_, _state, CountLeaves> > + /// > + /// {}; + /// \endcode + /// + /// The <tt>when\<G, R(A0,A1,...)\></tt> form accepts either a + /// CallableTransform or an ObjectTransform as its second parameter. + /// <tt>when\<\></tt> uses <tt>is_callable\<R\>::value</tt> to + /// distinguish between the two, and uses <tt>call\<\></tt> to + /// evaluate CallableTransforms and <tt>make\<\></tt> to evaluate + /// ObjectTransforms. + template<typename Grammar, typename R BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)> + struct when<Grammar, R(BOOST_PP_ENUM_PARAMS(N, A))> + : detail::when_impl<Grammar, R, R(BOOST_PP_ENUM_PARAMS(N, A))> + {}; + + #if N > 0 + /// \brief A grammar element and a PrimitiveTransform that associates + /// a transform with the grammar. + /// + /// Use <tt>when\<\></tt> to override a grammar's default transform + /// with a custom transform. It is for used when composing larger + /// transforms by associating smaller transforms with individual + /// rules in your grammar, as in the following transform which + /// counts the number of terminals in an expression. + /// + /// \code + /// // Count the terminals in an expression tree. + /// // Must be invoked with initial state == mpl::int_<0>(). + /// struct CountLeaves + /// : or_< + /// when<terminal<_>, mpl::next<_state>()> + /// , otherwise<fold<_, _state, CountLeaves> > + /// > + /// {}; + /// \endcode + /// + /// The <tt>when\<G, R(A0,A1,...)\></tt> form accepts either a + /// CallableTransform or an ObjectTransform as its second parameter. + /// <tt>when\<\></tt> uses <tt>is_callable\<R\>::value</tt> to + /// distinguish between the two, and uses <tt>call\<\></tt> to + /// evaluate CallableTransforms and <tt>make\<\></tt> to evaluate + /// ObjectTransforms. + template<typename Grammar, typename R BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)> + struct when<Grammar, R(BOOST_PP_ENUM_PARAMS(N, A)...)> + : detail::when_impl<Grammar, R, R(BOOST_PP_ENUM_PARAMS(N, A)...)> + {}; + #endif + + #undef N + +#endif |