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    25. 

  25. <div class="section">
    26. 

  26. <div class="titlepage"><div><div><h4 class="title">
    27. 

  27. <a name="phoenix.inside.expression.boilerplate_macros"></a><a class="link" href="boilerplate_macros.html" title="Boilerplate Macros">Boilerplate
    28. 

  28.         Macros</a>
    29. 

  29. </h4></div></div></div>
    30. 

  30. <div class="toc"><dl>
    31. 

  31. <dt><span class="section"><a href="boilerplate_macros.html#phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression">BOOST_PHOENIX_DEFINE_EXPRESSION</a></span></dt>
    32. 

  32. <dt><span class="section"><a href="boilerplate_macros.html#phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_vararg">BOOST_PHOENIX_DEFINE_EXPRESSION_VARARG</a></span></dt>
    33. 

  33. <dt><span class="section"><a href="boilerplate_macros.html#phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_ext">BOOST_PHOENIX_DEFINE_EXPRESSION_EXT</a></span></dt>
    34. 

  34. <dt><span class="section"><a href="boilerplate_macros.html#phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_ext_vararg">BOOST_PHOENIX_DEFINE_EXPRESSION_EXT_VARARG</a></span></dt>
    35. 

  35. </dl></div>
    36. 

  36. <p>
    37. 

  37.           When having more and more expressions, you start to realize that this is
    38. 

  38.           a very repetetive task. Phoenix provides boilerplate macros that make defining
    39. 

  39.           Phoenix Expressions as you have seen in the <a class="link" href="../expression.html" title="Phoenix Expressions">previous
    40. 

  40.           section</a> look like a piece of cake.
    41. 

  41.         </p>
    42. 

  42. <div class="section">
    43. 

  43. <div class="titlepage"><div><div><h5 class="title">
    44. 

  44. <a name="phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression"></a><a class="link" href="boilerplate_macros.html#phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression" title="BOOST_PHOENIX_DEFINE_EXPRESSION">BOOST_PHOENIX_DEFINE_EXPRESSION</a>
    45. 

  45. </h5></div></div></div>
    46. 

  46. <a name="phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression.description"></a><h6>
    47. 

  47. <a name="id843517"></a>
    48. 

  48.             <a class="link" href="boilerplate_macros.html#phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression.description">Description</a>
    49. 

  49.           </h6>
    50. 

  50. <p>
    51. 

  51.             <code class="computeroutput"><span class="identifier">BOOST_PHOENIX_DEFINE_EXPRESSION</span></code>
    52. 

  52.             is a macro that can be used to generate all the necessary boilerplate
    53. 

  53.             to create Phoenix Expressions
    54. 

  54.           </p>
    55. 

  55. <a name="phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression.synopsis"></a><h6>
    56. 

  56. <a name="id843552"></a>
    57. 

  57.             <a class="link" href="boilerplate_macros.html#phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression.synopsis">Synopsis</a>
    58. 

  58.           </h6>
    59. 

  59. <pre class="programlisting"><span class="identifier">BOOST_PHOENIX_DEFINE_EXPRESSION</span><span class="special">(</span>
    60. 

  60.     <span class="special">(</span><span class="identifier">namespace_seq</span><span class="special">)(</span><span class="identifier">name</span><span class="special">)</span>
    61. 

  61.   <span class="special">,</span> <span class="special">(</span><span class="identifier">child_grammar0</span><span class="special">)</span>
    62. 

  62.     <span class="special">(</span><span class="identifier">child_grammar1</span><span class="special">)</span>
    63. 

  63.     <span class="special">...</span>
    64. 

  64. <span class="special">)</span>
    65. 

  65. </pre>
    66. 

  66. <a name="phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression.semantics"></a><h6>
    67. 

  67. <a name="id843658"></a>
    68. 

  68.             <a class="link" href="boilerplate_macros.html#phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression.semantics">Semantics</a>
    69. 

  69.           </h6>
    70. 

  70. <p>
    71. 

  71.             The above macro generates the necessary code for an expression <code class="computeroutput"><span class="identifier">name</span></code> in namespace <code class="computeroutput"><span class="identifier">namespace_seq</span></code>.
    72. 

  72.             The sequence of <code class="computeroutput"><span class="special">(</span><span class="identifier">child_grammarN</span><span class="special">)</span></code> declares how many children the expression
    73. 

  73.             will have and what <code class="computeroutput"><span class="identifier">proto</span><span class="special">::</span><span class="identifier">grammar</span></code>
    74. 

  74.             they match.
    75. 

  75.           </p>
    76. 

  76. <p>
    77. 

  77.             The macro should be used at global scope. <code class="computeroutput"><span class="identifier">namespace_seq</span></code>
    78. 

  78.             shall be the sequence of namespaces under which the following symbols
    79. 

  79.             will be defined:
    80. 

  80.           </p>
    81. 

  81. <pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">tag</span>
    82. 

  82. <span class="special">{</span>
    83. 

  83.     <span class="keyword">struct</span> <span class="identifier">name</span><span class="special">;</span>
    84. 

  84. <span class="special">}</span>
    85. 

  85. 

  86. <span class="keyword">namespace</span> <span class="identifier">expression</span>
    87. 

  87. <span class="special">{</span>
    88. 

  88.     <span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">A0</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">A1</span> <span class="special">...</span> <span class="keyword">typename</span> <span class="identifier">AN</span><span class="special">&gt;</span>
    89. 

  89.     <span class="keyword">struct</span> <span class="identifier">name</span>
    90. 

  90.         <span class="special">:</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">phoenix</span><span class="special">::</span><span class="identifier">expr</span><span class="special">&lt;</span>
    91. 

  91.             <span class="identifier">tag</span><span class="special">::</span><span class="identifier">name</span>
    92. 

  92.           <span class="special">,</span> <span class="identifier">A0</span>
    93. 

  93.           <span class="special">,</span> <span class="identifier">A1</span>
    94. 

  94.             <span class="special">...</span>
    95. 

  95.           <span class="special">,</span> <span class="identifier">AN</span>
    96. 

  96.         <span class="special">&gt;</span>
    97. 

  97. <span class="special">}</span>
    98. 

  98. 

  99. <span class="keyword">namespace</span> <span class="identifier">rule</span>
    100. 

  100. <span class="special">{</span>
    101. 

  101.     <span class="keyword">struct</span> <span class="identifier">name</span>
    102. 

  102.         <span class="special">:</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">phoenix</span><span class="special">::</span><span class="identifier">expr</span><span class="special">&lt;</span>
    103. 

  103.             <span class="identifier">child_grammar0</span>
    104. 

  104.           <span class="special">,</span> <span class="identifier">child_grammar1</span>
    105. 

  105.             <span class="special">...</span>
    106. 

  106.           <span class="special">,</span> <span class="identifier">child_grammarN</span>
    107. 

  107.         <span class="special">&gt;</span>
    108. 

  108.     <span class="special">{};</span>
    109. 

  109. <span class="special">}</span>
    110. 

  110. 

  111. <span class="keyword">namespace</span> <span class="identifier">functional</span>
    112. 

  112. <span class="special">{</span>
    113. 

  113.     <span class="keyword">struct</span> <span class="identifier">make_name</span><span class="special">;</span> <span class="comment">// A polymorphic function object that can be called to create the expression node
    114. 

  114. </span><span class="special">}</span>
    115. 

  115. 

  116. <span class="keyword">namespace</span> <span class="identifier">result_of</span>
    117. 

  117. <span class="special">{</span>
    118. 

  118.     <span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">A0</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">A1</span> <span class="special">...</span> <span class="keyword">typename</span> <span class="identifier">AN</span><span class="special">&gt;</span>
    119. 

  119.     <span class="keyword">struct</span> <span class="identifier">make_name</span><span class="special">;</span> <span class="comment">// The result type of the expression node
    120. 

  120. </span><span class="special">}</span>
    121. 

  121. 

  122. <span class="comment">// convenience polymorphic function to create an expression node
    123. 

  123. </span><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">A0</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">A1</span> <span class="special">...</span> <span class="keyword">typename</span> <span class="identifier">AN</span><span class="special">&gt;</span>
    124. 

  124. <span class="identifier">result_of</span><span class="special">::</span><span class="identifier">make_name</span><span class="special">&lt;</span><span class="identifier">A0</span><span class="special">,</span> <span class="identifier">A1</span> <span class="special">...</span> <span class="identifier">AN</span><span class="special">&gt;</span>
    125. 

  125. <span class="identifier">make_name</span><span class="special">(</span><span class="identifier">A0</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">a0</span><span class="special">,</span> <span class="identifier">A1</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">a1</span> <span class="special">...</span> <span class="identifier">AN</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">an</span><span class="special">);</span>
    126. 

  126. </pre>
    127. 

  127. <p>
    128. 

  128.             This macros also adds a specialization for <code class="computeroutput"><span class="identifier">meta_grammar</span><span class="special">::</span><span class="identifier">case_</span><span class="special">&lt;</span><span class="identifier">tag</span><span class="special">::</span><span class="identifier">name</span><span class="special">&gt;</span></code> to enable the rule for further use
    129. 

  129.             in actions.
    130. 

  130.           </p>
    131. 

  131. <a name="phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression.header"></a><h6>
    132. 

  132. <a name="id844495"></a>
    133. 

  133.             <a class="link" href="boilerplate_macros.html#phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression.header">Header</a>
    134. 

  134.           </h6>
    135. 

  135. <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">phoenix</span><span class="special">/</span><span class="identifier">core</span><span class="special">/</span><span class="identifier">expression</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
    136. 

  136. </pre>
    137. 

  137. <a name="phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression.example"></a><h6>
    138. 

  138. <a name="id844579"></a>
    139. 

  139.             <a class="link" href="boilerplate_macros.html#phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression.example">Example</a>
    140. 

  140.           </h6>
    141. 

  141. <p>
    142. 

  142.             The example from the previous section can be rewritten as:
    143. 

  143.           </p>
    144. 

  144. <pre class="programlisting"><span class="identifier">BOOST_PHOENIX_DEFINE_EXPRESSION</span><span class="special">(</span>
    145. 

  145.     <span class="special">(</span><span class="identifier">plus</span><span class="special">)</span>
    146. 

  146.   <span class="special">,</span> <span class="special">(</span><span class="identifier">meta_grammar</span><span class="special">)</span>               <span class="comment">// Lhs
    147. 

  147. </span>    <span class="special">(</span><span class="identifier">meta_grammar</span><span class="special">)</span>               <span class="comment">// Rhs
    148. 

  148. </span><span class="special">)</span>
    149. 

  149. 

  150. <span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Rhs</span><span class="special">&gt;</span>
    151. 

  151. <span class="keyword">typename</span> <span class="identifier">plus</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">&gt;::</span><span class="identifier">type</span>
    152. 

  152. <span class="identifier">plus</span><span class="special">(</span><span class="identifier">Lhs</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">lhs</span><span class="special">,</span> <span class="identifier">Rhs</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">rhs</span><span class="special">)</span>
    153. 

  153. <span class="special">{</span>
    154. 

  154.     <span class="keyword">return</span> <span class="identifier">expression</span><span class="special">::</span><span class="identifier">plus</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">&gt;::</span><span class="identifier">make</span><span class="special">(</span><span class="identifier">lhs</span><span class="special">,</span> <span class="identifier">rhs</span><span class="special">);</span>
    155. 

  155. <span class="special">}</span>
    156. 

  156. </pre>
    157. 

  157. </div>
    158. 

  158. <div class="section">
    159. 

  159. <div class="titlepage"><div><div><h5 class="title">
    160. 

  160. <a name="phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_vararg"></a><a class="link" href="boilerplate_macros.html#phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_vararg" title="BOOST_PHOENIX_DEFINE_EXPRESSION_VARARG">BOOST_PHOENIX_DEFINE_EXPRESSION_VARARG</a>
    161. 

  161. </h5></div></div></div>
    162. 

  162. <a name="phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_vararg.description"></a><h6>
    163. 

  163. <a name="id844930"></a>
    164. 

  164.             <a class="link" href="boilerplate_macros.html#phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_vararg.description">Description</a>
    165. 

  165.           </h6>
    166. 

  166. <p>
    167. 

  167.             <code class="computeroutput"><span class="identifier">BOOST_PHOENIX_DEFINE_EXPRESSION_VARARG</span></code>
    168. 

  168.             is a macro that can be used to generate all the necessary boilerplate
    169. 

  169.             to create Phoenix Expressions
    170. 

  170.           </p>
    171. 

  171. <a name="phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_vararg.synopsis"></a><h6>
    172. 

  172. <a name="id844966"></a>
    173. 

  173.             <a class="link" href="boilerplate_macros.html#phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_vararg.synopsis">Synopsis</a>
    174. 

  174.           </h6>
    175. 

  175. <pre class="programlisting"><span class="identifier">BOOST_PHOENIX_DEFINE_EXPRESSION_VARARG</span><span class="special">(</span>
    176. 

  176.     <span class="special">(</span><span class="identifier">namespace_seq</span><span class="special">)(</span><span class="identifier">name</span><span class="special">)</span>
    177. 

  177.   <span class="special">,</span> <span class="special">(</span><span class="identifier">child_grammar0</span><span class="special">)</span>
    178. 

  178.     <span class="special">(</span><span class="identifier">child_grammar1</span><span class="special">)</span>
    179. 

  179.     <span class="special">...</span>
    180. 

  180.     <span class="special">(</span><span class="identifier">child_grammarN</span><span class="special">)</span>
    181. 

  181.   <span class="special">,</span> <span class="identifier">N</span>
    182. 

  182. <span class="special">)</span>
    183. 

  183. </pre>
    184. 

  184. <a name="phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_vararg.semantics"></a><h6>
    185. 

  185. <a name="id845097"></a>
    186. 

  186.             <a class="link" href="boilerplate_macros.html#phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_vararg.semantics">Semantics</a>
    187. 

  187.           </h6>
    188. 

  188. <p>
    189. 

  189.             The above macro generates the necessary code for an expression <code class="computeroutput"><span class="identifier">name</span></code> in namespace <code class="computeroutput"><span class="identifier">namespace_seq</span></code>.
    190. 

  190.             <code class="computeroutput"><span class="identifier">N</span></code> is the maximum number
    191. 

  191.             of variable children. All but the last elements in the grammar sequence
    192. 

  192.             are required children of the expression, and the last denotes a variable
    193. 

  193.             number of children. The number of children an expression of this kind
    194. 

  194.             can hold is therefor <code class="computeroutput"><span class="identifier">N</span><span class="special">-</span><span class="number">1</span></code> plus
    195. 

  195.             the size of the sequence
    196. 

  196.           </p>
    197. 

  197. <p>
    198. 

  198.             The macro should be used at global scope. <code class="computeroutput"><span class="identifier">namespace_seq</span></code>
    199. 

  199.             shall be the sequence of namespaces under which the following symbols
    200. 

  200.             will be defined:
    201. 

  201.           </p>
    202. 

  202. <pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">tag</span>
    203. 

  203. <span class="special">{</span>
    204. 

  204.     <span class="keyword">struct</span> <span class="identifier">name</span><span class="special">;</span>
    205. 

  205. <span class="special">}</span>
    206. 

  206. 

  207. <span class="keyword">namespace</span> <span class="identifier">expression</span>
    208. 

  208. <span class="special">{</span>
    209. 

  209.     <span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">A0</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">A1</span> <span class="special">...</span> <span class="keyword">typename</span> <span class="identifier">AN</span><span class="special">&gt;</span>
    210. 

  210.     <span class="keyword">struct</span> <span class="identifier">name</span>
    211. 

  211.         <span class="special">:</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">phoenix</span><span class="special">::</span><span class="identifier">expr</span><span class="special">&lt;</span>
    212. 

  212.             <span class="identifier">tag</span><span class="special">::</span><span class="identifier">name</span>
    213. 

  213.           <span class="special">,</span> <span class="identifier">A0</span>
    214. 

  214.           <span class="special">,</span> <span class="identifier">A1</span>
    215. 

  215.             <span class="special">...</span>
    216. 

  216.           <span class="special">,</span> <span class="identifier">AN</span>
    217. 

  217.         <span class="special">&gt;</span>
    218. 

  218.     <span class="special">{};</span>
    219. 

  219. <span class="special">}</span>
    220. 

  220. 

  221. <span class="keyword">namespace</span> <span class="identifier">rule</span>
    222. 

  222. <span class="special">{</span>
    223. 

  223.     <span class="keyword">struct</span> <span class="identifier">name</span>
    224. 

  224.         <span class="special">:</span> <span class="identifier">expression</span><span class="special">::</span><span class="identifier">name</span><span class="special">&lt;</span>
    225. 

  225.             <span class="identifier">child_grammar0</span>
    226. 

  226.           <span class="special">,</span> <span class="identifier">child_grammar1</span>
    227. 

  227.             <span class="special">...</span>
    228. 

  228.           <span class="special">,</span> <span class="identifier">proto</span><span class="special">::</span><span class="identifier">vararg</span><span class="special">&lt;</span><span class="identifier">child_grammarN</span><span class="special">&gt;</span>
    229. 

  229.         <span class="special">&gt;</span>
    230. 

  230.     <span class="special">{};</span>
    231. 

  231. <span class="special">}</span>
    232. 

  232. 

  233. <span class="keyword">namespace</span> <span class="identifier">functional</span>
    234. 

  234. <span class="special">{</span>
    235. 

  235.     <span class="keyword">struct</span> <span class="identifier">make_name</span><span class="special">;</span> <span class="comment">// A polymorphic function object that can be called to create the expression node
    236. 

  236. </span><span class="special">}</span>
    237. 

  237. 

  238. <span class="keyword">namespace</span> <span class="identifier">result_of</span>
    239. 

  239. <span class="special">{</span>
    240. 

  240.     <span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">A0</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">A1</span> <span class="special">...</span> <span class="keyword">typename</span> <span class="identifier">AN</span><span class="special">&gt;</span>
    241. 

  241.     <span class="keyword">struct</span> <span class="identifier">make_name</span><span class="special">;</span> <span class="comment">// The result type of the expression node
    242. 

  242. </span><span class="special">}</span>
    243. 

  243. 

  244. <span class="comment">// convenience polymorphic function to create an expression node
    245. 

  245. </span><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">A0</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">A1</span> <span class="special">...</span> <span class="keyword">typename</span> <span class="identifier">AN</span><span class="special">&gt;</span>
    246. 

  246. <span class="identifier">result_of</span><span class="special">::</span><span class="identifier">make_name</span><span class="special">&lt;</span><span class="identifier">A0</span><span class="special">,</span> <span class="identifier">A1</span> <span class="special">...</span> <span class="identifier">AN</span><span class="special">&gt;</span>
    247. 

  247. <span class="identifier">make_name</span><span class="special">(</span><span class="identifier">A0</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">a0</span><span class="special">,</span> <span class="identifier">A1</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">a1</span> <span class="special">...</span> <span class="identifier">AN</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">an</span><span class="special">);</span>
    248. 

  248. </pre>
    249. 

  249. <p>
    250. 

  250.             This macros also adds a specialization for <code class="computeroutput"><span class="identifier">meta_grammar</span><span class="special">::</span><span class="identifier">case_</span><span class="special">&lt;</span><span class="identifier">tag</span><span class="special">::</span><span class="identifier">name</span><span class="special">&gt;</span></code> to enable the rule for further use
    251. 

  251.             in actions.
    252. 

  252.           </p>
    253. 

  253. <a name="phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_vararg.header"></a><h6>
    254. 

  254. <a name="id845946"></a>
    255. 

  255.             <a class="link" href="boilerplate_macros.html#phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_vararg.header">Header</a>
    256. 

  256.           </h6>
    257. 

  257. <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">phoenix</span><span class="special">/</span><span class="identifier">core</span><span class="special">/</span><span class="identifier">expression</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
    258. 

  258. </pre>
    259. 

  259. <a name="phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_vararg.example"></a><h6>
    260. 

  260. <a name="id846029"></a>
    261. 

  261.             <a class="link" href="boilerplate_macros.html#phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_vararg.example">Example</a>
    262. 

  262.           </h6>
    263. 

  263. <pre class="programlisting"><span class="identifier">BOOST_PHOENIX_DEFINE_EXPRESSION_VARARG</span><span class="special">(</span>
    264. 

  264.     <span class="special">(</span><span class="identifier">boost</span><span class="special">)(</span><span class="identifier">phoenix</span><span class="special">)(</span><span class="identifier">mem_fun_ptr</span><span class="special">)</span>
    265. 

  265.   <span class="special">,</span> <span class="special">(</span><span class="identifier">meta_grammar</span><span class="special">)</span>                <span class="comment">// Pointer to Object
    266. 

  266. </span>    <span class="special">(</span><span class="identifier">meta_grammar</span><span class="special">)</span>                <span class="comment">// Member pointer
    267. 

  267. </span>    <span class="special">(</span><span class="identifier">meta_grammar</span><span class="special">)</span>                <span class="comment">// Variable number of arguments
    268. 

  268. </span>  <span class="special">,</span> <span class="identifier">BOOST_PHOENIX_LIMIT</span>
    269. 

  269. <span class="special">)</span>
    270. 

  270. </pre>
    271. 

  271. <p>
    272. 

  272.             This defines the member function pointer operator expression as described
    273. 

  273.             in <a class="link" href="../../modules/operator.html" title="Operator">operators</a>.
    274. 

  274.           </p>
    275. 

  275. </div>
    276. 

  276. <div class="section">
    277. 

  277. <div class="titlepage"><div><div><h5 class="title">
    278. 

  278. <a name="phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_ext"></a><a class="link" href="boilerplate_macros.html#phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_ext" title="BOOST_PHOENIX_DEFINE_EXPRESSION_EXT">BOOST_PHOENIX_DEFINE_EXPRESSION_EXT</a>
    279. 

  279. </h5></div></div></div>
    280. 

  280. <a name="phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_ext.description"></a><h6>
    281. 

  281. <a name="id846209"></a>
    282. 

  282.             <a class="link" href="boilerplate_macros.html#phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_ext.description">Description</a>
    283. 

  283.           </h6>
    284. 

  284. <p>
    285. 

  285.             <code class="computeroutput"><span class="identifier">BOOST_PHOENIX_DEFINE_EXPRESSION_EXT</span></code>
    286. 

  286.             is a macro that can be used to generate all the necessary boilerplate
    287. 

  287.             to create Phoenix Expressions
    288. 

  288.           </p>
    289. 

  289. <a name="phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_ext.synopsis"></a><h6>
    290. 

  290. <a name="id846245"></a>
    291. 

  291.             <a class="link" href="boilerplate_macros.html#phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_ext.synopsis">Synopsis</a>
    292. 

  292.           </h6>
    293. 

  293. <pre class="programlisting"><span class="identifier">BOOST_PHOENIX_DEFINE_EXPRESSION_EXT</span><span class="special">(</span>
    294. 

  294.     <span class="identifier">actor</span>
    295. 

  295.   <span class="special">,</span> <span class="special">(</span><span class="identifier">namespace_seq</span><span class="special">)(</span><span class="identifier">name</span><span class="special">)</span>
    296. 

  296.   <span class="special">,</span> <span class="special">(</span><span class="identifier">child_grammar0</span><span class="special">)</span>
    297. 

  297.     <span class="special">(</span><span class="identifier">child_grammar1</span><span class="special">)</span>
    298. 

  298.     <span class="special">...</span>
    299. 

  299.     <span class="special">(</span><span class="identifier">child_grammarN</span><span class="special">)</span>
    300. 

  300.   <span class="special">,</span> <span class="identifier">N</span>
    301. 

  301. <span class="special">)</span>
    302. 

  302. </pre>
    303. 

  303. <a name="phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_ext.semantics"></a><h6>
    304. 

  304. <a name="id846388"></a>
    305. 

  305.             <a class="link" href="boilerplate_macros.html#phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_ext.semantics">Semantics</a>
    306. 

  306.           </h6>
    307. 

  307. <p>
    308. 

  308.             The above macro generates the necessary code for an expression <code class="computeroutput"><span class="identifier">name</span></code> in namespace <code class="computeroutput"><span class="identifier">namespace_seq</span></code>.
    309. 

  309.             The sequence of <code class="computeroutput"><span class="special">(</span><span class="identifier">child_grammarN</span><span class="special">)</span></code> declares how many children the expression
    310. 

  310.             will have and what <code class="computeroutput"><span class="identifier">proto</span><span class="special">::</span><span class="identifier">grammar</span></code>
    311. 

  311.             they match.
    312. 

  312.           </p>
    313. 

  313. <p>
    314. 

  314.             The macro should be used at global scope. <code class="computeroutput"><span class="identifier">namespace_seq</span></code>
    315. 

  315.             shall be the sequence of namespaces under which the following symbols
    316. 

  316.             will be defined:
    317. 

  317.           </p>
    318. 

  318. <pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">tag</span>
    319. 

  319. <span class="special">{</span>
    320. 

  320.     <span class="keyword">struct</span> <span class="identifier">name</span><span class="special">;</span>
    321. 

  321. <span class="special">}</span>
    322. 

  322. 

  323. <span class="keyword">namespace</span> <span class="identifier">expression</span>
    324. 

  324. <span class="special">{</span>
    325. 

  325.     <span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">A0</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">A1</span> <span class="special">...</span> <span class="keyword">typename</span> <span class="identifier">AN</span><span class="special">&gt;</span>
    326. 

  326.     <span class="keyword">struct</span> <span class="identifier">name</span>
    327. 

  327.         <span class="special">:</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">phoenix</span><span class="special">::</span><span class="identifier">expr_ext</span><span class="special">&lt;</span>
    328. 

  328.             <span class="identifier">actor</span>
    329. 

  329.           <span class="special">,</span> <span class="identifier">tag</span><span class="special">::</span><span class="identifier">name</span>
    330. 

  330.           <span class="special">,</span> <span class="identifier">A0</span>
    331. 

  331.           <span class="special">,</span> <span class="identifier">A1</span>
    332. 

  332.             <span class="special">...</span>
    333. 

  333.           <span class="special">,</span> <span class="identifier">AN</span>
    334. 

  334.         <span class="special">&gt;</span>
    335. 

  335. <span class="special">}</span>
    336. 

  336. 

  337. <span class="keyword">namespace</span> <span class="identifier">rule</span>
    338. 

  338. <span class="special">{</span>
    339. 

  339.     <span class="keyword">struct</span> <span class="identifier">name</span>
    340. 

  340.         <span class="special">:</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">phoenix</span><span class="special">::</span><span class="identifier">expr</span><span class="special">&lt;</span>
    341. 

  341.             <span class="identifier">child_grammar0</span>
    342. 

  342.           <span class="special">,</span> <span class="identifier">child_grammar1</span>
    343. 

  343.             <span class="special">...</span>
    344. 

  344.           <span class="special">,</span> <span class="identifier">child_grammarN</span>
    345. 

  345.         <span class="special">&gt;</span>
    346. 

  346.     <span class="special">{};</span>
    347. 

  347. <span class="special">}</span>
    348. 

  348. 

  349. <span class="keyword">namespace</span> <span class="identifier">functional</span>
    350. 

  350. <span class="special">{</span>
    351. 

  351.     <span class="keyword">struct</span> <span class="identifier">make_name</span><span class="special">;</span> <span class="comment">// A polymorphic function object that can be called to create the expression node
    352. 

  352. </span><span class="special">}</span>
    353. 

  353. 

  354. <span class="keyword">namespace</span> <span class="identifier">result_of</span>
    355. 

  355. <span class="special">{</span>
    356. 

  356.     <span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">A0</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">A1</span> <span class="special">...</span> <span class="keyword">typename</span> <span class="identifier">AN</span><span class="special">&gt;</span>
    357. 

  357.     <span class="keyword">struct</span> <span class="identifier">make_name</span><span class="special">;</span> <span class="comment">// The result type of the expression node
    358. 

  358. </span><span class="special">}</span>
    359. 

  359. 

  360. <span class="comment">// convenience polymorphic function to create an expression node
    361. 

  361. </span><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">A0</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">A1</span> <span class="special">...</span> <span class="keyword">typename</span> <span class="identifier">AN</span><span class="special">&gt;</span>
    362. 

  362. <span class="identifier">result_of</span><span class="special">::</span><span class="identifier">make_name</span><span class="special">&lt;</span><span class="identifier">A0</span><span class="special">,</span> <span class="identifier">A1</span> <span class="special">...</span> <span class="identifier">AN</span><span class="special">&gt;</span>
    363. 

  363. <span class="identifier">make_name</span><span class="special">(</span><span class="identifier">A0</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">a0</span><span class="special">,</span> <span class="identifier">A1</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">a1</span> <span class="special">...</span> <span class="identifier">AN</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">an</span><span class="special">);</span>
    364. 

  364. </pre>
    365. 

  365. <p>
    366. 

  366.             This macros also adds a specialization for <code class="computeroutput"><span class="identifier">meta_grammar</span><span class="special">::</span><span class="identifier">case_</span><span class="special">&lt;</span><span class="identifier">tag</span><span class="special">::</span><span class="identifier">name</span><span class="special">&gt;</span></code> to enable the rule for further use
    367. 

  367.             in actions.
    368. 

  368.           </p>
    369. 

  369. <a name="phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_ext.header"></a><h6>
    370. 

  370. <a name="id847236"></a>
    371. 

  371.             <a class="link" href="boilerplate_macros.html#phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_ext.header">Header</a>
    372. 

  372.           </h6>
    373. 

  373. <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">phoenix</span><span class="special">/</span><span class="identifier">core</span><span class="special">/</span><span class="identifier">expression</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
    374. 

  374. </pre>
    375. 

  375. <a name="phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_ext.example"></a><h6>
    376. 

  376. <a name="id847320"></a>
    377. 

  377.             <a class="link" href="boilerplate_macros.html#phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_ext.example">Example</a>
    378. 

  378.           </h6>
    379. 

  379. <pre class="programlisting"><span class="identifier">BOOST_PHOENIX_DEFINE_EXPRESSION_EXT</span><span class="special">(</span>
    380. 

  380.     <span class="identifier">if_actor</span>
    381. 

  381.   <span class="special">,</span> <span class="special">(</span><span class="identifier">boost</span><span class="special">)(</span><span class="identifier">phoenix</span><span class="special">)(</span><span class="identifier">if_</span><span class="special">)</span>
    382. 

  382.   <span class="special">,</span> <span class="special">(</span><span class="identifier">meta_grammar</span><span class="special">)</span> <span class="comment">// Cond
    383. 

  383. </span>    <span class="special">(</span><span class="identifier">meta_grammar</span><span class="special">)</span> <span class="comment">// Then
    384. 

  384. </span><span class="special">)</span>
    385. 

  385. </pre>
    386. 

  386. <p>
    387. 

  387.             This defines the if_ expression. The custom actor defines <code class="computeroutput"><span class="identifier">else_</span></code> as a member.
    388. 

  388.           </p>
    389. 

  389. </div>
    390. 

  390. <div class="section">
    391. 

  391. <div class="titlepage"><div><div><h5 class="title">
    392. 

  392. <a name="phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_ext_vararg"></a><a class="link" href="boilerplate_macros.html#phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_ext_vararg" title="BOOST_PHOENIX_DEFINE_EXPRESSION_EXT_VARARG">BOOST_PHOENIX_DEFINE_EXPRESSION_EXT_VARARG</a>
    393. 

  393. </h5></div></div></div>
    394. 

  394. <a name="phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_ext_vararg.description"></a><h6>
    395. 

  395. <a name="id847483"></a>
    396. 

  396.             <a class="link" href="boilerplate_macros.html#phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_ext_vararg.description">Description</a>
    397. 

  397.           </h6>
    398. 

  398. <p>
    399. 

  399.             <code class="computeroutput"><span class="identifier">BOOST_PHOENIX_DEFINE_EXPRESSION_EXT_VARARG</span></code>
    400. 

  400.             is a macro that can be used to generate all the necessary boilerplate
    401. 

  401.             to create Phoenix Expressions
    402. 

  402.           </p>
    403. 

  403. <a name="phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_ext_vararg.synopsis"></a><h6>
    404. 

  404. <a name="id847519"></a>
    405. 

  405.             <a class="link" href="boilerplate_macros.html#phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_ext_vararg.synopsis">Synopsis</a>
    406. 

  406.           </h6>
    407. 

  407. <pre class="programlisting"><span class="identifier">BOOST_PHOENIX_DEFINE_EXPRESSION_EXT_VARARG</span><span class="special">(</span>
    408. 

  408.     <span class="identifier">actor</span>
    409. 

  409.   <span class="special">,</span> <span class="special">(</span><span class="identifier">namespace_seq</span><span class="special">)(</span><span class="identifier">name</span><span class="special">)</span>
    410. 

  410.   <span class="special">,</span> <span class="special">(</span><span class="identifier">child_grammar0</span><span class="special">)</span>
    411. 

  411.     <span class="special">(</span><span class="identifier">child_grammar1</span><span class="special">)</span>
    412. 

  412.     <span class="special">...</span>
    413. 

  413.     <span class="special">(</span><span class="identifier">child_grammarN</span><span class="special">)</span>
    414. 

  414.   <span class="special">,</span> <span class="identifier">N</span>
    415. 

  415. <span class="special">)</span>
    416. 

  416. </pre>
    417. 

  417. <a name="phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_ext_vararg.semantics"></a><h6>
    418. 

  418. <a name="id847663"></a>
    419. 

  419.             <a class="link" href="boilerplate_macros.html#phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_ext_vararg.semantics">Semantics</a>
    420. 

  420.           </h6>
    421. 

  421. <p>
    422. 

  422.             The above macro generates the necessary code for an expression <code class="computeroutput"><span class="identifier">name</span></code> in namespace <code class="computeroutput"><span class="identifier">namespace_seq</span></code>.
    423. 

  423.             <code class="computeroutput"><span class="identifier">N</span></code> is the maximum number
    424. 

  424.             of variable children. All but the last elements in the grammar sequence
    425. 

  425.             are required children of the expression, and the last denotes a variable
    426. 

  426.             number of children. The number of children an expression of this kind
    427. 

  427.             can hold is therefor <code class="computeroutput"><span class="identifier">N</span><span class="special">-</span><span class="number">1</span></code> plus
    428. 

  428.             the size of the sequence
    429. 

  429.           </p>
    430. 

  430. <p>
    431. 

  431.             The macro should be used at global scope. <code class="computeroutput"><span class="identifier">namespace_seq</span></code>
    432. 

  432.             shall be the sequence of namespaces under which the following symbols
    433. 

  433.             will be defined:
    434. 

  434.           </p>
    435. 

  435. <pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">tag</span>
    436. 

  436. <span class="special">{</span>
    437. 

  437.     <span class="keyword">struct</span> <span class="identifier">name</span><span class="special">;</span>
    438. 

  438. <span class="special">}</span>
    439. 

  439. 

  440. <span class="keyword">namespace</span> <span class="identifier">expression</span>
    441. 

  441. <span class="special">{</span>
    442. 

  442.     <span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">A0</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">A1</span> <span class="special">...</span> <span class="keyword">typename</span> <span class="identifier">AN</span><span class="special">&gt;</span>
    443. 

  443.     <span class="keyword">struct</span> <span class="identifier">name</span>
    444. 

  444.         <span class="special">:</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">phoenix</span><span class="special">::</span><span class="identifier">expr_ext</span><span class="special">&lt;</span>
    445. 

  445.             <span class="identifier">actor</span>
    446. 

  446.           <span class="special">,</span> <span class="identifier">tag</span><span class="special">::</span><span class="identifier">name</span>
    447. 

  447.           <span class="special">,</span> <span class="identifier">A0</span>
    448. 

  448.           <span class="special">,</span> <span class="identifier">A1</span>
    449. 

  449.             <span class="special">...</span>
    450. 

  450.           <span class="special">,</span> <span class="identifier">AN</span>
    451. 

  451.         <span class="special">&gt;</span>
    452. 

  452.     <span class="special">{};</span>
    453. 

  453. <span class="special">}</span>
    454. 

  454. 

  455. <span class="keyword">namespace</span> <span class="identifier">rule</span>
    456. 

  456. <span class="special">{</span>
    457. 

  457.     <span class="keyword">struct</span> <span class="identifier">name</span>
    458. 

  458.         <span class="special">:</span> <span class="identifier">expression</span><span class="special">::</span><span class="identifier">name</span><span class="special">&lt;</span>
    459. 

  459.             <span class="identifier">child_grammar0</span>
    460. 

  460.           <span class="special">,</span> <span class="identifier">child_grammar1</span>
    461. 

  461.             <span class="special">...</span>
    462. 

  462.           <span class="special">,</span> <span class="identifier">proto</span><span class="special">::</span><span class="identifier">vararg</span><span class="special">&lt;</span><span class="identifier">child_grammarN</span><span class="special">&gt;</span>
    463. 

  463.         <span class="special">&gt;</span>
    464. 

  464.     <span class="special">{};</span>
    465. 

  465. <span class="special">}</span>
    466. 

  466. 

  467. <span class="keyword">namespace</span> <span class="identifier">functional</span>
    468. 

  468. <span class="special">{</span>
    469. 

  469.     <span class="keyword">struct</span> <span class="identifier">make_name</span><span class="special">;</span> <span class="comment">// A polymorphic function object that can be called to create the expression node
    470. 

  470. </span><span class="special">}</span>
    471. 

  471. 

  472. <span class="keyword">namespace</span> <span class="identifier">result_of</span>
    473. 

  473. <span class="special">{</span>
    474. 

  474.     <span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">A0</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">A1</span> <span class="special">...</span> <span class="keyword">typename</span> <span class="identifier">AN</span><span class="special">&gt;</span>
    475. 

  475.     <span class="keyword">struct</span> <span class="identifier">make_name</span><span class="special">;</span> <span class="comment">// The result type of the expression node
    476. 

  476. </span><span class="special">}</span>
    477. 

  477. 

  478. <span class="comment">// convenience polymorphic function to create an expression node
    479. 

  479. </span><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">A0</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">A1</span> <span class="special">...</span> <span class="keyword">typename</span> <span class="identifier">AN</span><span class="special">&gt;</span>
    480. 

  480. <span class="identifier">result_of</span><span class="special">::</span><span class="identifier">make_name</span><span class="special">&lt;</span><span class="identifier">A0</span><span class="special">,</span> <span class="identifier">A1</span> <span class="special">...</span> <span class="identifier">AN</span><span class="special">&gt;</span>
    481. 

  481. <span class="identifier">make_name</span><span class="special">(</span><span class="identifier">A0</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">a0</span><span class="special">,</span> <span class="identifier">A1</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">a1</span> <span class="special">...</span> <span class="identifier">AN</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">an</span><span class="special">);</span>
    482. 

  482. </pre>
    483. 

  483. <p>
    484. 

  484.             This macros also adds a specialization for <code class="computeroutput"><span class="identifier">meta_grammar</span><span class="special">::</span><span class="identifier">case_</span><span class="special">&lt;</span><span class="identifier">tag</span><span class="special">::</span><span class="identifier">name</span><span class="special">&gt;</span></code> to enable the rule for further use
    485. 

  485.             in actions.
    486. 

  486.           </p>
    487. 

  487. <a name="phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_ext_vararg.header"></a><h6>
    488. 

  488. <a name="id848523"></a>
    489. 

  489.             <a class="link" href="boilerplate_macros.html#phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_ext_vararg.header">Header</a>
    490. 

  490.           </h6>
    491. 

  491. <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">phoenix</span><span class="special">/</span><span class="identifier">core</span><span class="special">/</span><span class="identifier">expression</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
    492. 

  492. </pre>
    493. 

  493. <a name="phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_ext_vararg.example"></a><h6>
    494. 

  494. <a name="id848607"></a>
    495. 

  495.             <a class="link" href="boilerplate_macros.html#phoenix.inside.expression.boilerplate_macros.boost_phoenix_define_expression_ext_vararg.example">Example</a>
    496. 

  496.           </h6>
    497. 

  497. <p>
    498. 

  498.             TBD
    499. 

  499.           </p>
    500. 

  500. </div>
    501. 

  501. </div>
    502. 

  502. <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
    503. 

  503. <td align="left"></td>
    504. 

  504. <td align="right"><div class="copyright-footer">Copyright &#169; 2002-2005, 2010 Joel de Guzman, Dan Marsden, Thomas Heller<p>
    505. 

  505.         Distributed under the Boost Software License, Version 1.0. (See accompanying
    506. 

  506.         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>)
    507. 

  507.       </p>
    508. 

  508. </div></td>
    509. 

  509. </tr></table>
    510. 

  510. <hr>
    511. 

  511. <div class="spirit-nav">
    512. 

  512. <a accesskey="p" href="../expression.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../expression.html"><img src="../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="../actions.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a>
    513. 

  513. </div>
    514. 

  514. </body>
    515. 

  515. </html>
    516.