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6 | <title>deduce_quat2</title> | |
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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_quat2</h3> | |
20 | </div> | |
21 | <div class="RenoIncludeDIV"><p><span class="RenoEscape">#<!--<wiki>`#</wiki>--></span>include <<span class="RenoLink"><a href="boost_qvm_deduce_quat_hpp.html">boost/qvm/deduce_quat.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 <class A,class B> | |
27 | struct <span class="RenoLink">deduce_quat2</span> | |
28 | { | |
29 | typedef /*unspecified*/ type; | |
30 | };</span> | |
31 | } | |
32 | }</pre> | |
33 | </div><h4>Assumptions:</h4> | |
34 | <div><ul><li>Both <i><span class="RenoLink"><a href="scalar.html">scalar</a></span><A>::type</i> and <i><span class="RenoLink"><a href="scalar.html">scalar</a></span><B>::type</i> are well defined</li> | |
35 | <li><i><span class="RenoLink"><a href="is_quat.html">is_quat</a></span><A>::value || <span class="RenoLink"><a href="is_quat.html">is_quat</a></span><B>::value</i> is <i>true</i></li> | |
36 | </ul></div> | |
37 | <h4>Requirements:</h4> | |
38 | <div><ul><li><i><span class="RenoLink"><a href="is_quat.html">is_quat</a></span><<span class="RenoLink">deduce_quat2</span><A,B>::type>::value</i> must be <i>true</i></li> | |
39 | <li><i><span class="RenoLink">deduce_quat2</span><A,B>::type</i> must be copyable</li> | |
40 | </ul></div> | |
41 | <p>This template is used by Boost QVM whenever it needs to deduce a quaternion type from the types of two user-supplied function parameters. The returned type must have accessible copy constructor (the <i>A</i> and <i>B</i> types themselves could be non-copyable, and either one of them may not be a quaternion type.)</p> | |
42 | <p>The main template definition returns an unspecified quaternion type with <i><span class="RenoLink"><a href="mat_traits_M_scalar_type.html">scalar_type</a></span></i> obtained by <i><span class="RenoLink"><a href="deduce_scalar.html">deduce_scalar</a></span><A,B>::type</i>, except if <i>A</i> and <i>B</i> are the same quaternion type <i>Q</i>, in which case <i>Q</i> is returned, which is only suitable for copyable types. Boost QVM also defines (partial) specializations for the non-copyable quaternion types it produces. Users can define other (partial) specializations for their own types.</p> | |
43 | <p>A typical use of the <i><span class="RenoLink">deduce_quat2</span></i> template is for specifying the preferred quaternion type to be returned by the generic function template overloads in Boost QVM depending on the type of their arguments.</p> | |
44 | </div><div class="RenoAutoDIV"><div class="RenoHR"><hr/></div> | |
45 | See also: <span class="RenoPageList"><a href="boost_qvm_deduce_quat_hpp.html">boost/qvm/deduce_quat.hpp</a> | <a href="boost_qvm_quat_traits_array_hpp.html">boost/qvm/quat_traits_array.hpp</a> | <a href="operator_times_quat_quat_.html">operator*(quat,quat)</a> | <a href="operator_plus_quat_quat_.html">operator+(quat,quat)</a> | <a href="operator_minus_quat_quat_.html">operator-(quat,quat)</a> | <a href="slerp.html">slerp</a></span> | |
46 | </div> | |
47 | <!-- Copyright (c) 2008-2016 Emil Dotchevski and Reverge Studios, Inc. --> | |
48 | <!-- Distributed under the Boost Software License, Version 1.0. (See accompanying --> | |
49 | <!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) --> | |
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54 | <small>Copyright (c) 2008-2016 by Emil Dotchevski and Reverge Studios, Inc.<br/> | |
55 | Distributed under the <a href="http://www.boost.org/LICENSE_1_0.txt">Boost Software License, Version 1.0</a>.</small> | |
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