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| <title>The C Preprocessor: C++ Named Operators</title> |
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| <a name="C_002b_002b-Named-Operators-1"></a> |
| <h4 class="subsection">3.7.4 C++ Named Operators</h4> |
| <a name="index-named-operators"></a> |
| <a name="index-C_002b_002b-named-operators"></a> |
| <a name="index-iso646_002eh"></a> |
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| <p>In C++, there are eleven keywords which are simply alternate spellings |
| of operators normally written with punctuation. These keywords are |
| treated as such even in the preprocessor. They function as operators in |
| ‘<samp>#if</samp>’, and they cannot be defined as macros or poisoned. In C, you |
| can request that those keywords take their C++ meaning by including |
| <samp>iso646.h</samp>. That header defines each one as a normal object-like |
| macro expanding to the appropriate punctuator. |
| </p> |
| <p>These are the named operators and their corresponding punctuators: |
| </p> |
| <table> |
| <tr><td>Named Operator</td><td>Punctuator</td></tr> |
| <tr><td><code>and</code></td><td><code>&&</code></td></tr> |
| <tr><td><code>and_eq</code></td><td><code>&=</code></td></tr> |
| <tr><td><code>bitand</code></td><td><code>&</code></td></tr> |
| <tr><td><code>bitor</code></td><td><code>|</code></td></tr> |
| <tr><td><code>compl</code></td><td><code>~</code></td></tr> |
| <tr><td><code>not</code></td><td><code>!</code></td></tr> |
| <tr><td><code>not_eq</code></td><td><code>!=</code></td></tr> |
| <tr><td><code>or</code></td><td><code>||</code></td></tr> |
| <tr><td><code>or_eq</code></td><td><code>|=</code></td></tr> |
| <tr><td><code>xor</code></td><td><code>^</code></td></tr> |
| <tr><td><code>xor_eq</code></td><td><code>^=</code></td></tr> |
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