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<a name="spirit.qi.quick_reference.qi_parsers.auxiliary"></a><a class="link" href="auxiliary.html" title="Auxiliary Parsers">
Auxiliary Parsers</a>
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<p>
Expression
</p>
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Attribute
</p>
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Description
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<p>
<a class="link" href="../../reference/auxiliary/eol.html" title="End of Line (eol)"><code class="computeroutput"><span class="identifier">eol</span></code></a>
</p>
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<p>
<code class="computeroutput"><span class="identifier">Unused</span></code>
</p>
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<p>
Matches the end of line (<code class="computeroutput"><span class="special">\</span><span class="identifier">r</span></code> or <code class="computeroutput"><span class="special">\</span><span class="identifier">n</span></code> or <code class="computeroutput"><span class="special">\</span><span class="identifier">r</span><span class="special">\</span><span class="identifier">n</span></code>)
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<p>
<a class="link" href="../../reference/auxiliary/eoi.html" title="End of Input (eoi)"><code class="computeroutput"><span class="identifier">eoi</span></code></a>
</p>
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<code class="computeroutput"><span class="identifier">Unused</span></code>
</p>
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<p>
Matches the end of input (first == last)
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<p>
<a class="link" href="../../reference/auxiliary/eps.html" title="Epsilon (eps)"><code class="computeroutput"><span class="identifier">eps</span></code></a>
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<code class="computeroutput"><span class="identifier">Unused</span></code>
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<p>
Match an empty string
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<p>
<a class="link" href="../../reference/auxiliary/eps.html" title="Epsilon (eps)"><code class="computeroutput"><span class="identifier">eps</span></code></a><code class="computeroutput"><span class="special">(</span><span class="identifier">b</span><span class="special">)</span></code>
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<code class="computeroutput"><span class="identifier">Unused</span></code>
</p>
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<p>
If <code class="computeroutput"><span class="identifier">b</span></code> is true,
match an empty string
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<p>
<a class="link" href="../../reference/auxiliary/lazy.html" title="Lazy (lazy)"><code class="computeroutput"><span class="identifier">lazy</span></code></a><code class="computeroutput"><span class="special">(</span><span class="identifier">fp</span><span class="special">)</span></code>
</p>
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<p>
Attribute of <code class="computeroutput"><span class="identifier">P</span></code>
where <code class="computeroutput"><span class="identifier">P</span></code> is
the return type of <code class="computeroutput"><span class="identifier">fp</span></code>
</p>
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<td>
<p>
Invoke <code class="computeroutput"><span class="identifier">fp</span></code> at
parse time, returning a parser <code class="computeroutput"><span class="identifier">p</span></code>
which is then called to parse.
</p>
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<p>
<code class="computeroutput"><span class="identifier">fp</span></code>
</p>
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<p>
see <code class="computeroutput"><span class="identifier">lazy</span><span class="special">(</span><span class="identifier">fp</span><span class="special">)</span></code>
above
</p>
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<p>
Equivalent to <code class="computeroutput"><span class="identifier">lazy</span><span class="special">(</span><span class="identifier">fp</span><span class="special">)</span></code>
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<p>
<a class="link" href="../../reference/auxiliary/attr.html" title="Attribute (attr)"><code class="computeroutput"><span class="identifier">attr</span><span class="special">(</span><span class="identifier">attrib</span><span class="special">)</span></code></a>
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<p>
<code class="computeroutput"><span class="identifier">Attrib</span></code>
</p>
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<p>
Doesn't consume/parse any input, but exposes the argument
<code class="computeroutput"><span class="identifier">attrib</span></code> as its
attribute.
</p>
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<td align="right"><div class="copyright-footer">Copyright © 2001-2010 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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