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| <div class="titlepage"><div><div><h5 class="title"> |
| <a name="range.reference.algorithms.numeric.accumulate"></a><a class="link" href="accumulate.html" title="accumulate"> accumulate</a> |
| </h5></div></div></div> |
| <a name="range.reference.algorithms.numeric.accumulate.prototype"></a><h6> |
| <a name="id860544"></a> |
| <a class="link" href="accumulate.html#range.reference.algorithms.numeric.accumulate.prototype">Prototype</a> |
| </h6> |
| <p> |
| |
| </p> |
| <pre class="programlisting"><span class="keyword">template</span><span class="special"><</span> |
| <span class="keyword">class</span> <span class="identifier">SinglePassRange</span><span class="special">,</span> |
| <span class="keyword">class</span> <span class="identifier">Value</span> |
| <span class="special">></span> |
| <span class="identifier">Value</span> <span class="identifier">accumulate</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">SinglePassRange</span><span class="special">&</span> <span class="identifier">source_rng</span><span class="special">,</span> |
| <span class="identifier">Value</span> <span class="identifier">init</span><span class="special">);</span> |
| |
| <span class="keyword">template</span><span class="special"><</span> |
| <span class="keyword">class</span> <span class="identifier">SinglePassRange</span><span class="special">,</span> |
| <span class="keyword">class</span> <span class="identifier">Value</span><span class="special">,</span> |
| <span class="keyword">class</span> <span class="identifier">BinaryOperation</span> |
| <span class="special">></span> |
| <span class="identifier">Value</span> <span class="identifier">accumulate</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">SinglePassRange</span><span class="special">&</span> <span class="identifier">source_rng</span><span class="special">,</span> |
| <span class="identifier">Value</span> <span class="identifier">init</span><span class="special">,</span> |
| <span class="identifier">BinaryOperation</span> <span class="identifier">op</span><span class="special">);</span> |
| </pre> |
| <p> |
| </p> |
| <a name="range.reference.algorithms.numeric.accumulate.description"></a><h6> |
| <a name="id860802"></a> |
| <a class="link" href="accumulate.html#range.reference.algorithms.numeric.accumulate.description">Description</a> |
| </h6> |
| <p> |
| <code class="computeroutput"><span class="identifier">accumulate</span></code> is a generalisation |
| of summation. It computes a binary operation (<code class="computeroutput"><span class="keyword">operator</span><span class="special">+</span></code> in the non-predicate version) of <code class="computeroutput"><span class="identifier">init</span></code> and all of the elements in <code class="computeroutput"><span class="identifier">rng</span></code>. |
| </p> |
| <p> |
| The return value is the resultant value of the above algorithm. |
| </p> |
| <a name="range.reference.algorithms.numeric.accumulate.definition"></a><h6> |
| <a name="id860880"></a> |
| <a class="link" href="accumulate.html#range.reference.algorithms.numeric.accumulate.definition">Definition</a> |
| </h6> |
| <p> |
| Defined in the header file <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">range</span><span class="special">/</span><span class="identifier">numeric</span><span class="special">.</span><span class="identifier">hpp</span></code> |
| </p> |
| <a name="range.reference.algorithms.numeric.accumulate.requirements"></a><h6> |
| <a name="id860942"></a> |
| <a class="link" href="accumulate.html#range.reference.algorithms.numeric.accumulate.requirements">Requirements</a> |
| </h6> |
| <a name="range.reference.algorithms.numeric.accumulate.for_the_first_version"></a><h6> |
| <a name="id860966"></a> |
| <a class="link" href="accumulate.html#range.reference.algorithms.numeric.accumulate.for_the_first_version">For |
| the first version</a> |
| </h6> |
| <div class="orderedlist"><ol class="orderedlist" type="1"> |
| <li class="listitem"> |
| <code class="computeroutput"><span class="identifier">SinglePassRange</span></code> is |
| a model of the <a class="link" href="../../../concepts/single_pass_range.html" title="Single Pass Range">Single |
| Pass Range</a> Concept. |
| </li> |
| <li class="listitem"> |
| <code class="computeroutput"><span class="identifier">Value</span></code> is a model |
| of the <code class="computeroutput"><span class="identifier">AssignableConcept</span></code>. |
| </li> |
| <li class="listitem"> |
| An <code class="computeroutput"><span class="keyword">operator</span><span class="special">+</span></code> |
| is defined for a left-hand operand of type <code class="computeroutput"><span class="identifier">Value</span></code> |
| and a right-hand operance of the <code class="computeroutput"><span class="identifier">SinglePassRange</span></code> |
| value type. |
| </li> |
| <li class="listitem"> |
| The return type of the above operator is convertible to <code class="computeroutput"><span class="identifier">Value</span></code>. |
| </li> |
| </ol></div> |
| <a name="range.reference.algorithms.numeric.accumulate.for_the_second_version"></a><h6> |
| <a name="id861115"></a> |
| <a class="link" href="accumulate.html#range.reference.algorithms.numeric.accumulate.for_the_second_version">For |
| the second version</a> |
| </h6> |
| <div class="orderedlist"><ol class="orderedlist" type="1"> |
| <li class="listitem"> |
| <code class="computeroutput"><span class="identifier">SinglePassRange</span></code> is |
| a model of the <a class="link" href="../../../concepts/single_pass_range.html" title="Single Pass Range">Single |
| Pass Range</a> Concept. |
| </li> |
| <li class="listitem"> |
| <code class="computeroutput"><span class="identifier">Value</span></code> is a model |
| of the <code class="computeroutput"><span class="identifier">AssignableConcept</span></code>. |
| </li> |
| <li class="listitem"> |
| <code class="computeroutput"><span class="identifier">BinaryOperation</span></code> is |
| a model of the <code class="computeroutput"><span class="identifier">BinaryFunctionConcept</span></code>. |
| </li> |
| <li class="listitem"> |
| <code class="computeroutput"><span class="identifier">Value</span></code> is convertible |
| to <code class="computeroutput"><span class="identifier">BinaryOperation</span></code>'s |
| first argument type. |
| </li> |
| <li class="listitem"> |
| <code class="computeroutput"><span class="identifier">SinglePassRange</span></code>'s |
| value type is convertible to <code class="computeroutput"><span class="identifier">BinaryOperation</span></code>'s |
| second argument type. |
| </li> |
| <li class="listitem"> |
| The return type of <code class="computeroutput"><span class="identifier">BinaryOperation</span></code> |
| is convertible to <code class="computeroutput"><span class="identifier">Value</span></code>. |
| </li> |
| </ol></div> |
| <a name="range.reference.algorithms.numeric.accumulate.complexity"></a><h6> |
| <a name="id861313"></a> |
| <a class="link" href="accumulate.html#range.reference.algorithms.numeric.accumulate.complexity">Complexity</a> |
| </h6> |
| <p> |
| Linear. Exactly <code class="computeroutput"><span class="identifier">distance</span><span class="special">(</span><span class="identifier">source_rng</span><span class="special">)</span></code>. |
| </p> |
| </div> |
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| <td align="right"><div class="copyright-footer">Copyright © 2003 -2010 Thorsten Ottosen, Neil Groves<p> |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) |
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