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| <div class="section"> |
| <div class="titlepage"><div><div><h5 class="title"> |
| <a name="range.reference.algorithms.non_mutating.equal"></a><a class="link" href="equal.html" title="equal"> equal</a> |
| </h5></div></div></div> |
| <a name="range.reference.algorithms.non_mutating.equal.prototype"></a><h6> |
| <a name="id823739"></a> |
| <a class="link" href="equal.html#range.reference.algorithms.non_mutating.equal.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">SinglePassRange1</span><span class="special">,</span> |
| <span class="keyword">class</span> <span class="identifier">SinglePassRange2</span> |
| <span class="special">></span> |
| <span class="keyword">bool</span> <span class="identifier">equal</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">SinglePassRange1</span><span class="special">&</span> <span class="identifier">rng1</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">SinglePassRange2</span><span class="special">&</span> <span class="identifier">rng2</span><span class="special">);</span> |
| |
| <span class="keyword">template</span><span class="special"><</span> |
| <span class="keyword">class</span> <span class="identifier">SinglePassRange1</span><span class="special">,</span> |
| <span class="keyword">class</span> <span class="identifier">SinglePassRange2</span><span class="special">,</span> |
| <span class="keyword">class</span> <span class="identifier">BinaryPredicate</span> |
| <span class="special">></span> |
| <span class="keyword">bool</span> <span class="identifier">equal</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">SinglePassRange1</span><span class="special">&</span> <span class="identifier">rng1</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">SinglePassRange2</span><span class="special">&</span> <span class="identifier">rng2</span><span class="special">,</span> |
| <span class="identifier">BinaryPredicate</span> <span class="identifier">pred</span><span class="special">);</span> |
| </pre> |
| <p> |
| </p> |
| <a name="range.reference.algorithms.non_mutating.equal.description"></a><h6> |
| <a name="id824018"></a> |
| <a class="link" href="equal.html#range.reference.algorithms.non_mutating.equal.description">Description</a> |
| </h6> |
| <p> |
| <code class="computeroutput"><span class="identifier">equal</span></code> returns <code class="computeroutput"><span class="keyword">true</span></code> if <code class="computeroutput"><span class="identifier">distance</span><span class="special">(</span><span class="identifier">rng1</span><span class="special">)</span></code> is equal to the <code class="computeroutput"><span class="identifier">distance</span><span class="special">(</span><span class="identifier">rng2</span><span class="special">)</span></code> and for each element <code class="computeroutput"><span class="identifier">x</span></code> |
| in <code class="computeroutput"><span class="identifier">rng1</span></code>, the corresponding |
| element <code class="computeroutput"><span class="identifier">y</span></code> in <code class="computeroutput"><span class="identifier">rng2</span></code> is equal. Otherwise <code class="computeroutput"><span class="keyword">false</span></code> is returned. |
| </p> |
| <p> |
| In this range version of <code class="computeroutput"><span class="identifier">equal</span></code> |
| it is perfectly acceptable to pass in two ranges of unequal lengths. |
| </p> |
| <p> |
| Elements are considered equal in the non-predicate version if <code class="computeroutput"><span class="keyword">operator</span><span class="special">==</span></code> |
| returns <code class="computeroutput"><span class="keyword">true</span></code>. Elements are |
| considered equal in the predicate version if <code class="computeroutput"><span class="identifier">pred</span><span class="special">(</span><span class="identifier">x</span><span class="special">,</span><span class="identifier">y</span><span class="special">)</span></code> is <code class="computeroutput"><span class="keyword">true</span></code>. |
| </p> |
| <a name="range.reference.algorithms.non_mutating.equal.definition"></a><h6> |
| <a name="id824254"></a> |
| <a class="link" href="equal.html#range.reference.algorithms.non_mutating.equal.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">algorithm</span><span class="special">/</span><span class="identifier">equal</span><span class="special">.</span><span class="identifier">hpp</span></code> |
| </p> |
| <a name="range.reference.algorithms.non_mutating.equal.requirements"></a><h6> |
| <a name="id824325"></a> |
| <a class="link" href="equal.html#range.reference.algorithms.non_mutating.equal.requirements">Requirements</a> |
| </h6> |
| <p> |
| <span class="bold"><strong>For the non-predicate versions:</strong></span> |
| </p> |
| <div class="itemizedlist"><ul class="itemizedlist" type="disc"> |
| <li class="listitem"> |
| <code class="computeroutput"><span class="identifier">SinglePassRange1</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">SinglePassRange2</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">SinglePassRange1</span></code>'s |
| value type is a model of the <code class="computeroutput"><span class="identifier">EqualityComparableConcept</span></code>. |
| </li> |
| <li class="listitem"> |
| <code class="computeroutput"><span class="identifier">SinglePassRange2</span></code>'s |
| value type is a model of the <code class="computeroutput"><span class="identifier">EqualityComparableConcept</span></code>. |
| </li> |
| <li class="listitem"> |
| <code class="computeroutput"><span class="identifier">SinglePassRange1</span></code>'s |
| value type can be compared for equality with <code class="computeroutput"><span class="identifier">SinglePassRange2</span></code>'s |
| value type. |
| </li> |
| </ul></div> |
| <p> |
| <span class="bold"><strong>For the predicate versions:</strong></span> |
| </p> |
| <div class="itemizedlist"><ul class="itemizedlist" type="disc"> |
| <li class="listitem"> |
| <code class="computeroutput"><span class="identifier">SinglePassRange1</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">SinglePassRange2</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">BinaryPredicate</span></code> is |
| a model of the <code class="computeroutput"><span class="identifier">BinaryPredicateConcept</span></code>. |
| </li> |
| <li class="listitem"> |
| <code class="computeroutput"><span class="identifier">SinglePassRange1</span></code>'s |
| value type is convertible to <code class="computeroutput"><span class="identifier">BinaryPredicate</span></code>'s |
| first argument type. |
| </li> |
| <li class="listitem"> |
| <code class="computeroutput"><span class="identifier">SinglePassRange2</span></code>'s |
| value type is convertible to <code class="computeroutput"><span class="identifier">BinaryPredicate</span></code>'s |
| second argument type. |
| </li> |
| </ul></div> |
| <a name="range.reference.algorithms.non_mutating.equal.complexity"></a><h6> |
| <a name="id824650"></a> |
| <a class="link" href="equal.html#range.reference.algorithms.non_mutating.equal.complexity">Complexity</a> |
| </h6> |
| <p> |
| Linear. At most <code class="computeroutput"><span class="identifier">min</span><span class="special">(</span><span class="identifier">distance</span><span class="special">(</span><span class="identifier">rng1</span><span class="special">),</span> <span class="identifier">distance</span><span class="special">(</span><span class="identifier">rng2</span><span class="special">))</span></code> |
| comparisons. |
| </p> |
| </div> |
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| <td align="left"></td> |
| <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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