| .. Algorithms/Transformation Algorithms//copy |10 |
| |
| copy |
| ==== |
| |
| Synopsis |
| -------- |
| |
| .. parsed-literal:: |
| |
| template< |
| typename Sequence |
| , typename In = |unspecified| |
| > |
| struct copy |
| { |
| typedef |unspecified| type; |
| }; |
| |
| |
| |
| Description |
| ----------- |
| |
| Returns a copy of the original sequence. |
| |
| |transformation algorithm disclaimer| |
| |
| |
| Header |
| ------ |
| |
| .. parsed-literal:: |
| |
| #include <boost/mpl/copy.hpp> |
| |
| |
| Model of |
| -------- |
| |
| |Reversible Algorithm| |
| |
| |
| Parameters |
| ---------- |
| |
| +---------------+---------------------------+-------------------------------+ |
| | Parameter | Requirement | Description | |
| +===============+===========================+===============================+ |
| | ``Sequence`` | |Forward Sequence| | A sequence to copy. | |
| +---------------+---------------------------+-------------------------------+ |
| | ``In`` | |Inserter| | An inserter. | |
| +---------------+---------------------------+-------------------------------+ |
| |
| |
| Expression semantics |
| -------------------- |
| |
| |Semantics disclaimer...| |Reversible Algorithm|. |
| |
| For any |Forward Sequence| ``s``, and an |Inserter| ``in``: |
| |
| .. parsed-literal:: |
| |
| typedef copy<s,in>::type r; |
| |
| :Return type: |
| A type. |
| |
| :Semantics: |
| Equivalent to |
| |
| .. parsed-literal:: |
| |
| typedef fold< s,in::state,in::operation >::type r; |
| |
| |
| |
| Complexity |
| ---------- |
| |
| Linear. Exactly ``size<s>::value`` applications of ``in::operation``. |
| |
| |
| Example |
| ------- |
| |
| .. parsed-literal:: |
| |
| typedef vector_c<int,0,1,2,3,4,5,6,7,8,9> numbers; |
| typedef copy< |
| range_c<int,10,20> |
| , back_inserter< numbers > |
| >::type result; |
| |
| BOOST_MPL_ASSERT_RELATION( size<result>::value, ==, 20 ); |
| BOOST_MPL_ASSERT(( equal< result,range_c<int,0,20> > )); |
| |
| |
| See also |
| -------- |
| |
| |Transformation Algorithms|, |Reversible Algorithm|, |reverse_copy|, |copy_if|, |transform| |
| |
| |
| .. 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) |
