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- #ifndef BOOST_MPL_IDENTITY_HPP_INCLUDED
- #define BOOST_MPL_IDENTITY_HPP_INCLUDED
- #include <boost/mpl/aux_/na_spec.hpp>
- #include <boost/mpl/aux_/lambda_support.hpp>
- namespace boost { namespace mpl {
- template<
- typename BOOST_MPL_AUX_NA_PARAM(T)
- >
- struct identity
- {
- typedef T type;
- BOOST_MPL_AUX_LAMBDA_SUPPORT(1, identity, (T))
- };
- template<
- typename BOOST_MPL_AUX_NA_PARAM(T)
- >
- struct make_identity
- {
- typedef identity<T> type;
- BOOST_MPL_AUX_LAMBDA_SUPPORT(1, make_identity, (T))
- };
- BOOST_MPL_AUX_NA_SPEC_NO_ETI(1, identity)
- BOOST_MPL_AUX_NA_SPEC_NO_ETI(1, make_identity)
- }}
- #endif
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