projects / ceph.git / blame
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| 7c673cae FG |
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| 4 | <head> | |
| 5 | <meta http-equiv='Content-Type' content='text/html; charset=utf-8'/> | |
| 6 | <title>deduce_vec</title> | |
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| 10 | <div class="body-0"> | |
| 11 | <div class="body-1"> | |
| 12 | <div class="body-2"> | |
| 13 | <div> | |
| 14 | <h1>QVM: Quaternions, Vectors, Matrices</h1> | |
| 15 | </div> | |
| 16 | <!-- Copyright (c) 2008-2016 Emil Dotchevski and Reverge Studios, Inc. --> | |
| 17 | <!-- Distributed under the Boost Software License, Version 1.0. (See accompanying --> | |
| 18 | <!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) --> | |
| 19 | <div class="RenoIncludeDIV"><div class="RenoAutoDIV"><h3>deduce_vec</h3> | |
| 20 | </div> | |
| 21 | <div class="RenoIncludeDIV"><p><span class="RenoEscape">#<!--<wiki>`#</wiki>--></span>include <<span class="RenoLink"><a href="boost_qvm_deduce_vec_hpp.html">boost/qvm/deduce_vec.hpp</a></span>></p> | |
| 22 | <pre>namespace boost | |
| 23 | { | |
| 24 | namespace <span class="RenoLink"><a href="qvm.html">qvm</a></span> | |
| 25 | { | |
| 26 | <span class="RenoIncludeSPAN"> template < | |
| 27 | class V, | |
| 28 | int Dim=<span class="RenoLink"><a href="vec_traits_Vector_dim.html">vec_traits<Vector>::dim</a></span>> | |
| 29 | struct <span class="RenoLink">deduce_vec</span> | |
| 30 | { | |
| 31 | typedef /*unspecified*/ type; | |
| 32 | };</span> | |
| 33 | } | |
| 34 | }</pre> | |
| 35 | </div><h4>Assumption:</h4> | |
| 36 | <p><i><span class="RenoLink"><a href="is_vec.html">is_vec</a></span><V>::value</i> is <i>true</i>.</p> | |
| 37 | <h4>Requirements:</h4> | |
| 38 | <div><ul><li><i><span class="RenoLink"><a href="is_vec.html">is_vec</a></span><<span class="RenoLink">deduce_vec</span><V>::type>::value</i> must be <i>true</i></li> | |
| 39 | <li><i><span class="RenoLink">deduce_vec</span><V>::type</i> must be copyable</li> | |
| 40 | <li><i><span class="RenoLink"><a href="vec_traits.html">vec_traits</a></span><<span class="RenoLink">deduce_vec</span><V>::type>::<span class="RenoLink"><a href="vec_traits_Vector_dim.html">dim</a></span>==Dim</i></li> | |
| 41 | </ul></div> | |
| 42 | <p>This template is used by Boost QVM whenever it needs to deduce a copyable vector type of certain dimension from a single user-supplied function parameter of vector type. The returned type must have accessible copy constructor. Note that <i>V</i> may be non-copyable.</p> | |
| 43 | <p>The main template definition returns an unspecified copyable vector type of size <i>Dim</i>, except if <i><span class="RenoLink"><a href="vec_traits.html">vec_traits</a></span><V>::<span class="RenoLink"><a href="vec_traits_Vector_dim.html">dim</a></span>==Dim</i>, in which case it returns <i>V</i>, which is suitable only if <i>V</i> is a copyable type. Boost QVM also defines (partial) specializations for the non-copyable vector types it produces. Users can define other (partial) specializations for their own types.</p> | |
| 44 | <p>A typical use of the <i><span class="RenoLink">deduce_vec</span></i> template is for specifying the preferred vector type to be returned by the generic function template overloads in Boost QVM depending on the type of their arguments.</p> | |
| 45 | </div><div class="RenoAutoDIV"><div class="RenoHR"><hr/></div> | |
| 46 | See also: <span class="RenoPageList"><a href="boost_qvm_deduce_vec_hpp.html">boost/qvm/deduce_vec.hpp</a> | <a href="boost_qvm_vec_traits_array_hpp.html">boost/qvm/vec_traits_array.hpp</a> | <a href="normalized_vec_.html">normalized(vec)</a> | <a href="operator_times_vec_scalar_.html">operator*(vec,scalar)</a> | <a href="operator_minus_vec_.html">operator-(vec)</a> | <a href="operator_over_vec_scalar_.html">operator/(vec,scalar)</a></span> | |
| 47 | </div> | |
| 48 | <!-- Copyright (c) 2008-2016 Emil Dotchevski and Reverge Studios, Inc. --> | |
| 49 | <!-- Distributed under the Boost Software License, Version 1.0. (See accompanying --> | |
| 50 | <!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) --> | |
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| 55 | <small>Copyright (c) 2008-2016 by Emil Dotchevski and Reverge Studios, Inc.<br/> | |
| 56 | Distributed under the <a href="http://www.boost.org/LICENSE_1_0.txt">Boost Software License, Version 1.0</a>.</small> | |
| 57 | </p> | |
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