60 lines
3.7 KiB
HTML
60 lines
3.7 KiB
HTML
<!DOCTYPE html PUBLIC '-//W3C//DTD XHTML 1.0 Strict//EN'
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'http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd'>
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<html xmlns='http://www.w3.org/1999/xhtml' xml:lang='en' lang='en'>
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<head>
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<meta http-equiv='Content-Type' content='text/html; charset=utf-8'/>
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<title>deduce_scalar</title>
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<link href='reno.css' type='text/css' rel='stylesheet'/>
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</head>
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<body>
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<div class="body-0">
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<div class="body-1">
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<div class="body-2">
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<div>
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<h1>QVM: Quaternions, Vectors, Matrices</h1>
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</div>
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<!-- Copyright (c) 2008-2016 Emil Dotchevski and Reverge Studios, Inc. -->
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<!-- Distributed under the Boost Software License, Version 1.0. (See accompanying -->
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<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
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<div class="RenoIncludeDIV"><div class="RenoAutoDIV"><h3>deduce_scalar</h3>
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</div>
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<div class="RenoIncludeDIV"><div class="RenoIncludeDIV"><p><span class="RenoEscape">#<!--<wiki>`#</wiki>--></span>include <<span class="RenoLink"><a href="boost_qvm_deduce_scalar_hpp.html">boost/qvm/deduce_scalar.hpp</a></span>></p>
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<pre>namespace boost
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{
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namespace <span class="RenoLink"><a href="qvm.html">qvm</a></span>
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{
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<span class="RenoIncludeSPAN"> <span class="RenoIncludeSPAN">template <class A,class B>
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struct <span class="RenoLink">deduce_scalar</span>
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{
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typedef typename impl<A,B>::type type;
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};</span></span>
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}
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}</pre>
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</div></div><h4>Assumptions:</h4>
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<p><i>A</i> and <i>B</i> satisfy the <span class="RenoLink"><a href="scalar_requirements.html">scalar requirements</a></span>.</p>
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<h4>Returns:</h4>
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<p>If <i>A</i> and <i>B</i> are the same type, <i>impl<A,B>::type</i> returns that type. Otherwise, <i>impl<A,B>::type</i> is well defined for the following types only: <i>signed/unsigned char</i>, <i>signed/unsigned short</i>, <i>signed/unsigned int</i>, <i>signed/unsigned long</i>, <i>float</i> and <i>double</i>. The deduction logic is as follows:</p>
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<div><ul><li>if either of <i>A</i> and <i>B</i> is <i>double</i>, the result is <i>double</i>;</li>
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<li>else, if one of <i>A</i> and <i>B</i> is an integer type and the other is <i>float</i>, the result is <i>float</i>;</li>
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<li>else, if <i>A</i> or <i>B</i> is a signed integer and the other type is unsigned integer, the signed type is changed to unsigned, and then the lesser of the two integers is promoted to the other.</li>
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</ul></div>
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</div><div class="RenoAutoDIV"><div class="RenoHR"><hr/></div>
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See also: <span class="RenoPageList"><a href="boost_qvm_deduce_scalar_hpp.html">boost/qvm/deduce_scalar.hpp</a> | <a href="deduce_mat2.html">deduce_mat2</a> | <a href="deduce_quat2.html">deduce_quat2</a> | <a href="deduce_vec2.html">deduce_vec2</a> | <a href="dot_quat_quat_.html">dot(quat,quat)</a> | <a href="dot_vec_vec_.html">dot(vec,vec)</a></span>
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</div>
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<!-- Copyright (c) 2008-2016 Emil Dotchevski and Reverge Studios, Inc. -->
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<!-- Distributed under the Boost Software License, Version 1.0. (See accompanying -->
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<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
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<div id="footer">
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<small>Copyright (c) 2008-2016 by Emil Dotchevski and Reverge Studios, Inc.<br/>
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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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</p>
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</div>
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