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| <div class="titlepage"><div><div><h5 class="title"> |
| <a name="spirit.qi.reference.parser_concepts.naryparser"></a><a class="link" href="naryparser.html" title="NaryParser">NaryParser</a> |
| </h5></div></div></div> |
| <a name="spirit.qi.reference.parser_concepts.naryparser.description"></a><h6> |
| <a name="id843615"></a> |
| <a class="link" href="naryparser.html#spirit.qi.reference.parser_concepts.naryparser.description">Description</a> |
| </h6> |
| <p> |
| <span class="emphasis"><em>NaryParser</em></span> is a composite parser that has one or |
| more subjects. The NaryParser allows its subjects to be treated in the |
| same way as a single instance of a <a class="link" href="parser.html" title="Parser"><code class="computeroutput"><span class="identifier">Parser</span></code></a> following the Composite |
| Design Pattern. |
| </p> |
| <a name="spirit.qi.reference.parser_concepts.naryparser.refinement_of"></a><h6> |
| <a name="id843651"></a> |
| <a class="link" href="naryparser.html#spirit.qi.reference.parser_concepts.naryparser.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> |
| <div class="variablelist"> |
| <p class="title"><b>Notation</b></p> |
| <dl> |
| <dt><span class="term"><code class="computeroutput"><span class="identifier">p</span></code></span></dt> |
| <dd><p> |
| A NaryParser. |
| </p></dd> |
| <dt><span class="term"><code class="computeroutput"><span class="identifier">P</span></code></span></dt> |
| <dd><p> |
| A NaryParser type. |
| </p></dd> |
| </dl> |
| </div> |
| <a name="spirit.qi.reference.parser_concepts.naryparser.valid_expressions"></a><h6> |
| <a name="id843729"></a> |
| <a class="link" href="naryparser.html#spirit.qi.reference.parser_concepts.naryparser.valid_expressions">Valid |
| Expressions</a> |
| </h6> |
| <p> |
| In addition to the requirements defined in <a class="link" href="parser.html" title="Parser"><code class="computeroutput"><span class="identifier">Parser</span></code></a>, for any NaryParser the |
| following must be met: |
| </p> |
| <div class="informaltable"><table class="table"> |
| <colgroup> |
| <col> |
| <col> |
| <col> |
| </colgroup> |
| <thead><tr> |
| <th> |
| <p> |
| Expression |
| </p> |
| </th> |
| <th> |
| <p> |
| Semantics |
| </p> |
| </th> |
| <th> |
| <p> |
| Return type |
| </p> |
| </th> |
| </tr></thead> |
| <tbody><tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">p</span><span class="special">.</span><span class="identifier">elements</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| The tuple of elements. |
| </p> |
| </td> |
| <td> |
| <p> |
| A <a href="../../../../../../../../libs/fusion/doc/html/index.html" target="_top">Boost.Fusion</a> |
| Sequence of <a class="link" href="parser.html" title="Parser"><code class="computeroutput"><span class="identifier">Parser</span></code></a> types. |
| </p> |
| </td> |
| </tr></tbody> |
| </table></div> |
| <a name="spirit.qi.reference.parser_concepts.naryparser.type_expressions"></a><h6> |
| <a name="id843855"></a> |
| <a class="link" href="naryparser.html#spirit.qi.reference.parser_concepts.naryparser.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">p</span><span class="special">.</span><span class="identifier">elements_type</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| Elements tuple type. |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">traits</span><span class="special">::</span><span class="identifier">is_nary_parser</span><span class="special"><</span><span class="identifier">P</span><span class="special">>::</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 NaryParser, <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> |
| <a name="spirit.qi.reference.parser_concepts.naryparser.invariants"></a><h6> |
| <a name="id844029"></a> |
| <a class="link" href="naryparser.html#spirit.qi.reference.parser_concepts.naryparser.invariants">Invariants</a> |
| </h6> |
| <p> |
| For each element, <code class="computeroutput"><span class="identifier">E</span></code>, |
| in any NaryParser, <code class="computeroutput"><span class="identifier">P</span></code>, |
| the following invariant always holds: |
| </p> |
| <div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"> |
| <code class="computeroutput"><span class="identifier">traits</span><span class="special">::</span><span class="identifier">is_parser</span><span class="special"><</span><span class="identifier">E</span><span class="special">>::</span><span class="identifier">type</span></code> evaluates to <code class="computeroutput"><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">true_</span></code> |
| </li></ul></div> |
| <a name="spirit.qi.reference.parser_concepts.naryparser.models"></a><h6> |
| <a name="id844118"></a> |
| <a class="link" href="naryparser.html#spirit.qi.reference.parser_concepts.naryparser.models">Models</a> |
| </h6> |
| <div class="itemizedlist"><ul class="itemizedlist" type="disc"> |
| <li class="listitem"> |
| <a class="link" href="../operator/alternative.html" title="Alternative (a | b)">Alternative</a> |
| </li> |
| <li class="listitem"> |
| <a class="link" href="../operator/expect.html" title="Expectation (a > b)">Expect</a> |
| </li> |
| <li class="listitem"> |
| <a class="link" href="../operator/permutation.html" title="Permutation (a ^ b)">Permutation</a> |
| </li> |
| <li class="listitem"> |
| <a class="link" href="../operator/sequence.html" title="Sequence (a >> b)">Sequence</a> |
| </li> |
| <li class="listitem"> |
| <a class="link" href="../operator/sequential_or.html" title="Sequential Or (a || b)">Sequential |
| Or</a> |
| </li> |
| </ul></div> |
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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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