1.. Metafunctions/Concepts//Lambda Expression |30 2 3Lambda Expression 4================= 5 6Description 7----------- 8 9A |Lambda Expression| is a compile-time invocable entity in either of the following two 10forms: 11 12* |Metafunction Class| 13* |Placeholder Expression| 14 15Most of the MPL components accept either of those, and the concept 16gives us a consice way to describe these requirements. 17 18 19Expression requirements 20----------------------- 21 22See corresponding |Metafunction Class| and |Placeholder Expression| specifications. 23 24 25Models 26------ 27 28* |always| 29* |unpack_args| 30* ``plus<_, int_<2> >`` 31* ``if_< less<_1, int_<7> >, plus<_1,_2>, _1 >`` 32 33 34See also 35-------- 36 37|Metafunctions|, |Placeholders|, |apply|, |lambda| 38 39 40.. copyright:: Copyright � 2001-2009 Aleksey Gurtovoy and David Abrahams 41 Distributed under the Boost Software License, Version 1.0. (See accompanying 42 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 43