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author | Anas Nashif <anas.nashif@intel.com> | 2012-10-30 12:57:26 -0700 |
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committer | Anas Nashif <anas.nashif@intel.com> | 2012-10-30 12:57:26 -0700 |
commit | 1a78a62555be32868418fe52f8e330c9d0f95d5a (patch) | |
tree | d3765a80e7d3b9640ec2e930743630cd6b9fce2b /boost/function_types/result_type.hpp | |
download | boost-1a78a62555be32868418fe52f8e330c9d0f95d5a.tar.gz boost-1a78a62555be32868418fe52f8e330c9d0f95d5a.tar.bz2 boost-1a78a62555be32868418fe52f8e330c9d0f95d5a.zip |
Imported Upstream version 1.49.0upstream/1.49.0
Diffstat (limited to 'boost/function_types/result_type.hpp')
-rw-r--r-- | boost/function_types/result_type.hpp | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/boost/function_types/result_type.hpp b/boost/function_types/result_type.hpp new file mode 100644 index 0000000000..1fcaba6622 --- /dev/null +++ b/boost/function_types/result_type.hpp @@ -0,0 +1,50 @@ + +// (C) Copyright Tobias Schwinger +// +// Use modification and distribution are subject to the boost Software License, +// Version 1.0. (See http://www.boost.org/LICENSE_1_0.txt). + +//------------------------------------------------------------------------------ + +#ifndef BOOST_FT_RESULT_TYPE_HPP_INCLUDED +#define BOOST_FT_RESULT_TYPE_HPP_INCLUDED + +#include <boost/blank.hpp> +#include <boost/mpl/if.hpp> + +#include <boost/mpl/aux_/lambda_support.hpp> +#include <boost/type_traits/detail/template_arity_spec.hpp> + +#include <boost/mpl/at.hpp> + +#include <boost/function_types/is_callable_builtin.hpp> +#include <boost/function_types/components.hpp> + +namespace boost +{ + namespace function_types + { + template< typename T > struct result_type; + + namespace detail + { + template<typename T> struct result_type_impl + : mpl::at_c + < typename function_types::components<T>::types, 0 > + { }; + } + + template<typename T> struct result_type + : mpl::if_ + < function_types::is_callable_builtin<T> + , detail::result_type_impl<T>, boost::blank + >::type + { + BOOST_MPL_AUX_LAMBDA_SUPPORT(1,result_type,(T)) + }; + } + BOOST_TT_AUX_TEMPLATE_ARITY_SPEC(1,function_types::result_type) +} + +#endif + |