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| 1 | <html> |
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| 2 | <head> |
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| 3 | <title>BOOST_PP_NIL</title> |
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| 4 | <link rel="stylesheet" type="text/css" href="../styles.css"> |
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| 5 | </head> |
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| 6 | <body> |
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| 7 | <div style="margin-left: 0px;"> |
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| 8 | The <b>BOOST_PP_NIL</b> identifier is reserved by the library to indicate a non-macro. |
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| 9 | </div> |
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| 10 | <h4>Usage</h4> |
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| 11 | <div class="code"> |
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| 12 | <b>BOOST_PP_NIL</b> |
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| 13 | </div> |
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| 14 | <h4>Remarks</h4> |
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| 15 | <div> |
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| 16 | This identifier is <i>not</i> defined. |
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| 17 | Its purpose is to <i>not be a macro</i>. |
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| 18 | It is also used to terminate a <i>list</i>. |
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| 19 | </div> |
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| 20 | <h4>Sample Code</h4> |
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| 21 | <div><pre> |
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| 22 | #include <<a href="../headers/list/adt.html">boost/preprocessor/list/adt.hpp</a>> |
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| 23 | |
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| 24 | #define LIST (x, (y, (z, <a href="nil.html">BOOST_PP_NIL</a>))) |
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| 25 | |
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| 26 | <a href="list_first.html">BOOST_PP_LIST_FIRST</a>(x) // expands to x |
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| 27 | <a href="list_rest.html">BOOST_PP_LIST_REST</a>(x) // expands to (y, (z, <a href="nil.html">BOOST_PP_NIL</a>)) |
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| 28 | </pre></div> |
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| 29 | </body> |
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| 30 | </html> |
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