libs/spirit/doc/html/spirit/qi/reference/parser_concepts/primitiveparser.html


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<title>PrimitiveParser</title>
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<div class="titlepage"><div><div><h5 class="title">
<a name="spirit.qi.reference.parser_concepts.primitiveparser"></a><a class="link" href="primitiveparser.html" title="PrimitiveParser">PrimitiveParser</a>
</h5></div></div></div>
<h6>
<a name="spirit.qi.reference.parser_concepts.primitiveparser.h0"></a>
            <span><a name="spirit.qi.reference.parser_concepts.primitiveparser.description"></a></span><a class="link" href="primitiveparser.html#spirit.qi.reference.parser_concepts.primitiveparser.description">Description</a>
          </h6>
<p>
            <span class="emphasis"><em>PrimitiveParser</em></span> is the most basic building block
            that the client uses to build more complex parsers.
          </p>
<h6>
<a name="spirit.qi.reference.parser_concepts.primitiveparser.h1"></a>
            <span><a name="spirit.qi.reference.parser_concepts.primitiveparser.refinement_of"></a></span><a class="link" href="primitiveparser.html#spirit.qi.reference.parser_concepts.primitiveparser.refinement_of">Refinement
            of</a>
          </h6>
<div class="blockquote"><blockquote class="blockquote"><p>
              <a class="link" href="parser.html" title="Parser"><code class="computeroutput"><span class="identifier">Parser</span></code></a>
            </p></blockquote></div>
<h6>
<a name="spirit.qi.reference.parser_concepts.primitiveparser.h2"></a>
            <span><a name="spirit.qi.reference.parser_concepts.primitiveparser.pre_skip"></a></span><a class="link" href="primitiveparser.html#spirit.qi.reference.parser_concepts.primitiveparser.pre_skip">Pre-skip</a>
          </h6>
<p>
            Upon entry to the <code class="computeroutput"><span class="identifier">parse</span></code>
            member function, a PrimitiveParser is required to do a pre-skip. Leading
            <code class="computeroutput"><span class="identifier">skip</span></code> characters/tokens
            will be skipped prior to parsing. Only PrimitiveParsers are required
            to perform this pre-skip. This is typically carried out through a call
            to <code class="computeroutput"><span class="identifier">qi</span><span class="special">::</span><span class="identifier">skip_over</span></code>:
          </p>
<pre class="programlisting"><span class="identifier">qi</span><span class="special">::</span><span class="identifier">skip_over</span><span class="special">(</span><span class="identifier">f</span><span class="special">,</span> <span class="identifier">l</span><span class="special">,</span> <span class="identifier">skip</span><span class="special">);</span>
</pre>
<h6>
<a name="spirit.qi.reference.parser_concepts.primitiveparser.h3"></a>
            <span><a name="spirit.qi.reference.parser_concepts.primitiveparser.type_expressions"></a></span><a class="link" href="primitiveparser.html#spirit.qi.reference.parser_concepts.primitiveparser.type_expressions">Type
            Expressions</a>
          </h6>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                    <p>
                      Expression
                    </p>
                  </th>
<th>
                    <p>
                      Description
                    </p>
                  </th>
</tr></thead>
<tbody><tr>
<td>
                    <p>
                      <code class="computeroutput"><span class="identifier">traits</span><span class="special">::</span><span class="identifier">is_primitive_parser</span><span class="special">&lt;</span><span class="identifier">P</span><span class="special">&gt;::</span><span class="identifier">type</span></code>
                    </p>
                  </td>
<td>
                    <p>
                      Metafunction that evaluates to <code class="computeroutput"><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">true_</span></code>
                      if a certain type, <code class="computeroutput"><span class="identifier">P</span></code>,
                      is a PrimitiveParser, <code class="computeroutput"><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">false_</span></code>
                      otherwise (See <a href="../../../../../../../../libs/mpl/doc/refmanual/integral-constant.html" target="_top">MPL
                      Boolean Constant</a>).
                    </p>
                  </td>
</tr></tbody>
</table></div>
<h6>
<a name="spirit.qi.reference.parser_concepts.primitiveparser.h4"></a>
            <span><a name="spirit.qi.reference.parser_concepts.primitiveparser.models"></a></span><a class="link" href="primitiveparser.html#spirit.qi.reference.parser_concepts.primitiveparser.models">Models</a>
          </h6>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
                <a class="link" href="../auxiliary/attr.html" title="Attribute Parser (attr)"><code class="computeroutput"><span class="identifier">attr</span><span class="special">(</span><span class="identifier">attrib</span><span class="special">)</span></code></a>
              </li>
<li class="listitem">
                <a class="link" href="../auxiliary/eoi.html" title="End of Input Parser (eoi)"><code class="computeroutput"><span class="identifier">eoi</span></code></a>
              </li>
<li class="listitem">
                <a class="link" href="../auxiliary/eol.html" title="End of Line Parser (eol)"><code class="computeroutput"><span class="identifier">eol</span></code></a>
              </li>
<li class="listitem">
                <a class="link" href="../auxiliary/eps.html" title="Epsilon Parser (eps)"><code class="computeroutput"><span class="identifier">eps</span></code></a>
              </li>
<li class="listitem">
                <a class="link" href="../string/symbols.html" title="Symbols Parser (symbols)"><code class="computeroutput"><span class="identifier">symbols</span><span class="special">&lt;&gt;</span></code></a>
              </li>
</ul></div>
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<td align="right"><div class="copyright-footer">Copyright &#169; 2001-2011 Joel de Guzman, Hartmut Kaiser<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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