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POWhy do several of the standard operators not have standard functors?
 

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  1. POWhy do several of the standard operators not have standard functors?
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    <p>We have:</p> <ul> <li><code>std::plus</code> (<code>+</code>)</li> <li><code>std::minus</code> (<code>-</code>)</li> <li><code>std::multiplies</code> (<code>*</code>)</li> <li><code>std::divides</code> (<code>/</code>)</li> <li><code>std::modulus</code> (<code>%</code>)</li> <li><code>std::negate</code> (<code>-</code>)</li> <li><code>std::logical_or</code> (<code>||</code>)</li> <li><code>std::logical_not</code> (<code>!</code>)</li> <li><code>std::logical_and</code> (<code>&amp;&amp;</code>)</li> <li><code>std::equal_to</code> (<code>==</code>)</li> <li><code>std::not_equal_to</code> (<code>!=</code>)</li> <li><code>std::less</code> (<code>&lt;</code>)</li> <li><code>std::greater</code> (<code>&gt;</code>)</li> <li><code>std::less_equal</code> (<code>&lt;=</code>)</li> <li><code>std::greater_equal</code> (<code>&gt;=</code>)</li> </ul> <p>We don't have functors for:</p> <ul> <li><code>&amp;</code> (address-of)</li> <li><code>*</code> (dereference)</li> <li><code>[]</code></li> <li><code>,</code></li> <li>bitwise operators <code>~</code>, <code>&amp;</code>, <code>|</code>, <code>^</code>, <code>&lt;&lt;</code>, <code>&gt;&gt;</code></li> <li><code>++</code> (prefix/postfix) / <code>--</code> (prefix/postfix)</li> <li><code>sizeof</code></li> <li><code>static_cast</code> / <code>dynamic_cast</code> / <code>reinterpret_cast</code> / <code>const_cast</code></li> <li>c style casts</li> <li><code>new</code> / <code>new[]</code> / <code>delete</code> / <code>delete[]</code></li> <li>all of the member function pointer operators</li> <li>all of the compound assignment operators.</li> </ul> <p>Is there a reason we don't have those, or is it just an oversight?</p>
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    1. COI've reformatted your question to put the operators in a list, if you don't mind.
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    2. CO@In silico: Don't mind at all.
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    3. COActually more than wondering why those are missing I'm surprised about the ones that made it to the standard library. Apparently once again the lesson is to never understimate the power of the committee effect.
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