| .. Algorithms/Inserters//inserter |
| |
| .. _`inserter_`: |
| |
| inserter (class) |
| ================ |
| |
| Synopsis |
| -------- |
| |
| .. parsed-literal:: |
| |
| template< |
| typename State |
| , typename Operation |
| > |
| struct inserter |
| { |
| typedef State state; |
| typedef Operation operation; |
| }; |
| |
| |
| Description |
| ----------- |
| |
| A general-purpose model of the |Inserter| concept. |
| |
| |
| Header |
| ------ |
| |
| .. parsed-literal:: |
| |
| #include <boost/mpl/inserter.hpp> |
| |
| |
| Model of |
| -------- |
| |
| |Inserter| |
| |
| |
| Parameters |
| ---------- |
| |
| +---------------+-------------------------------+-----------------------------------+ |
| | Parameter | Requirement | Description | |
| +===============+===============================+===================================+ |
| | ``State`` | Any type | A initial state. | |
| +---------------+-------------------------------+-----------------------------------+ |
| | ``Operation`` | Binary |Lambda Expression| | An output operation. | |
| +---------------+-------------------------------+-----------------------------------+ |
| |
| Expression semantics |
| -------------------- |
| |
| |Semantics disclaimer...| |Inserter|. |
| |
| For any binary |Lambda Expression| ``op`` and arbitrary type ``state``: |
| |
| +---------------------------+-------------------------------------------+ |
| | Expression | Semantics | |
| +===========================+===========================================+ |
| | ``inserter<op,state>`` | An |Inserter|. | |
| +---------------------------+-------------------------------------------+ |
| |
| Complexity |
| ---------- |
| |
| Amortized constant time. |
| |
| |
| Example |
| ------- |
| |
| .. parsed-literal:: |
| |
| template< typename N > struct is_odd : bool_< ( N::value % 2 ) > {}; |
| |
| typedef copy< |
| range_c<int,0,10> |
| , inserter< // a filtering 'push_back' inserter |
| vector<> |
| , if_< is_odd<_2>, push_back<_1,_2>, _1 > |
| > |
| >::type odds; |
| |
| BOOST_MPL_ASSERT(( equal< odds, vector_c<int,1,3,5,7,9>, equal_to<_,_> > )); |
| |
| |
| See also |
| -------- |
| |
| |Algorithms|, |Inserter|, |Reversible Algorithm|, |front_inserter|, |back_inserter| |
| |
| .. |[inserter]| replace:: `inserter (class)`_ |
| |
| |
| .. copyright:: Copyright © 2001-2009 Aleksey Gurtovoy and David Abrahams |
| 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) |
