1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>Chapter 4. Function Invocation and Creation</title> 5<link rel="stylesheet" href="../boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="index.html" title="Boost.Python Reference Manual"> 8<link rel="up" href="index.html" title="Boost.Python Reference Manual"> 9<link rel="prev" href="object_wrappers/boost_python_tuple_hpp.html" title="boost/python/tuple.hpp"> 10<link rel="next" href="function_invocation_and_creation/boost_python_call_hpp.html" title="boost/python/call.hpp"> 11</head> 12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="" width="" height="" src="../images/boost.png"></td></tr></table> 14<hr> 15<div class="spirit-nav"> 16<a accesskey="p" href="object_wrappers/boost_python_tuple_hpp.html"><img src="../images/prev.png" alt="Prev"></a><a accesskey="u" href="index.html"><img src="../images/up.png" alt="Up"></a><a accesskey="h" href="index.html"><img src="../images/home.png" alt="Home"></a><a accesskey="n" href="function_invocation_and_creation/boost_python_call_hpp.html"><img src="../images/next.png" alt="Next"></a> 17</div> 18<div class="chapter"> 19<div class="titlepage"><div><div><h1 class="title"> 20<a name="function_invocation_and_creation"></a>Chapter 4. Function Invocation and Creation</h1></div></div></div> 21<div class="toc"> 22<p><b>Table of Contents</b></p> 23<dl class="toc"> 24<dt><span class="section"><a href="function_invocation_and_creation.html#function_invocation_and_creation.boost_python_args_hpp">boost/python/args.hpp</a></span></dt> 25<dd><dl> 26<dt><span class="section"><a href="function_invocation_and_creation.html#function_invocation_and_creation.boost_python_args_hpp.introduction">Introduction</a></span></dt> 27<dt><span class="section"><a href="function_invocation_and_creation.html#function_invocation_and_creation.boost_python_args_hpp.class_arg">Class 28 <code class="computeroutput"><span class="identifier">arg</span></code></a></span></dt> 29<dt><span class="section"><a href="function_invocation_and_creation.html#function_invocation_and_creation.boost_python_args_hpp.class_arg_constructor">Class 30 <code class="computeroutput"><span class="identifier">arg</span></code> constructor</a></span></dt> 31<dt><span class="section"><a href="function_invocation_and_creation.html#function_invocation_and_creation.boost_python_args_hpp.class_arg_operator">Class 32 <code class="computeroutput"><span class="identifier">arg</span></code> operator=</a></span></dt> 33<dt><span class="section"><a href="function_invocation_and_creation.html#function_invocation_and_creation.boost_python_args_hpp.keyword_expression_operator">Keyword-expression 34 operator,</a></span></dt> 35<dt><span class="section"><a href="function_invocation_and_creation.html#function_invocation_and_creation.boost_python_args_hpp.example">Example</a></span></dt> 36</dl></dd> 37<dt><span class="section"><a href="function_invocation_and_creation/boost_python_call_hpp.html">boost/python/call.hpp</a></span></dt> 38<dd><dl> 39<dt><span class="section"><a href="function_invocation_and_creation/boost_python_call_hpp.html#function_invocation_and_creation.boost_python_call_hpp.introduction">Introduction</a></span></dt> 40<dt><span class="section"><a href="function_invocation_and_creation/boost_python_call_hpp.html#function_invocation_and_creation.boost_python_call_hpp.function_call">Function 41 <code class="computeroutput"><span class="identifier">call</span></code></a></span></dt> 42<dt><span class="section"><a href="function_invocation_and_creation/boost_python_call_hpp.html#function_invocation_and_creation.boost_python_call_hpp.example">Example</a></span></dt> 43</dl></dd> 44<dt><span class="section"><a href="function_invocation_and_creation/boost_python_call_method_hpp.html">boost/python/call_method.hpp</a></span></dt> 45<dd><dl> 46<dt><span class="section"><a href="function_invocation_and_creation/boost_python_call_method_hpp.html#function_invocation_and_creation.boost_python_call_method_hpp.introduction">Introduction</a></span></dt> 47<dt><span class="section"><a href="function_invocation_and_creation/boost_python_call_method_hpp.html#function_invocation_and_creation.boost_python_call_method_hpp.function_call_method">Function 48 <code class="computeroutput"><span class="identifier">call_method</span></code></a></span></dt> 49<dt><span class="section"><a href="function_invocation_and_creation/boost_python_call_method_hpp.html#function_invocation_and_creation.boost_python_call_method_hpp.example">Example</a></span></dt> 50</dl></dd> 51<dt><span class="section"><a href="function_invocation_and_creation/boost_python_data_members_hpp.html">boost/python/data_members.hpp</a></span></dt> 52<dd><dl> 53<dt><span class="section"><a href="function_invocation_and_creation/boost_python_data_members_hpp.html#function_invocation_and_creation.boost_python_data_members_hpp.introduction">Introduction</a></span></dt> 54<dt><span class="section"><a href="function_invocation_and_creation/boost_python_data_members_hpp.html#function_invocation_and_creation.boost_python_data_members_hpp.functions">Functions</a></span></dt> 55<dt><span class="section"><a href="function_invocation_and_creation/boost_python_data_members_hpp.html#function_invocation_and_creation.boost_python_data_members_hpp.example">Example</a></span></dt> 56</dl></dd> 57<dt><span class="section"><a href="function_invocation_and_creation/boost_python_make_function_hpp.html">boost/python/make_function.hpp</a></span></dt> 58<dd><dl> 59<dt><span class="section"><a href="function_invocation_and_creation/boost_python_make_function_hpp.html#function_invocation_and_creation.boost_python_make_function_hpp.introduction">Introduction</a></span></dt> 60<dt><span class="section"><a href="function_invocation_and_creation/boost_python_make_function_hpp.html#function_invocation_and_creation.boost_python_make_function_hpp.functions">Functions</a></span></dt> 61<dt><span class="section"><a href="function_invocation_and_creation/boost_python_make_function_hpp.html#function_invocation_and_creation.boost_python_make_function_hpp.example">Example</a></span></dt> 62</dl></dd> 63<dt><span class="section"><a href="function_invocation_and_creation/boost_python_overloads_hpp.html">boost/python/overloads.hpp</a></span></dt> 64<dd><dl> 65<dt><span class="section"><a href="function_invocation_and_creation/boost_python_overloads_hpp.html#function_invocation_and_creation.boost_python_overloads_hpp.introduction">Introduction</a></span></dt> 66<dt><span class="section"><a href="function_invocation_and_creation/boost_python_overloads_hpp.html#function_invocation_and_creation.boost_python_overloads_hpp.overloaddispatcher_concept">OverloadDispatcher 67 Concept</a></span></dt> 68<dt><span class="section"><a href="function_invocation_and_creation/boost_python_overloads_hpp.html#function_invocation_and_creation.boost_python_overloads_hpp.macros">Macros</a></span></dt> 69<dt><span class="section"><a href="function_invocation_and_creation/boost_python_overloads_hpp.html#function_invocation_and_creation.boost_python_overloads_hpp.example">Example</a></span></dt> 70</dl></dd> 71<dt><span class="section"><a href="function_invocation_and_creation/boost_python_ptr_hpp.html">boost/python/ptr.hpp</a></span></dt> 72<dd><dl> 73<dt><span class="section"><a href="function_invocation_and_creation/boost_python_ptr_hpp.html#function_invocation_and_creation.boost_python_ptr_hpp.introduction">Introduction</a></span></dt> 74<dt><span class="section"><a href="function_invocation_and_creation/boost_python_ptr_hpp.html#function_invocation_and_creation.boost_python_ptr_hpp.functions">Functions</a></span></dt> 75<dt><span class="section"><a href="function_invocation_and_creation/boost_python_ptr_hpp.html#function_invocation_and_creation.boost_python_ptr_hpp.class_template_pointer_wrapper">Class 76 template <code class="computeroutput"><span class="identifier">pointer_wrapper</span></code></a></span></dt> 77<dt><span class="section"><a href="function_invocation_and_creation/boost_python_ptr_hpp.html#function_invocation_and_creation.boost_python_ptr_hpp.class_template_pointer_wrapper_t">Class 78 template <code class="computeroutput"><span class="identifier">pointer_wrapper</span></code> 79 types</a></span></dt> 80<dt><span class="section"><a href="function_invocation_and_creation/boost_python_ptr_hpp.html#function_invocation_and_creation.boost_python_ptr_hpp.class_template_pointer_wrapper_c">Class 81 template <code class="computeroutput"><span class="identifier">pointer_wrapper</span></code> 82 constructors and destructor</a></span></dt> 83<dt><span class="section"><a href="function_invocation_and_creation/boost_python_ptr_hpp.html#function_invocation_and_creation.boost_python_ptr_hpp.class_template_pointer_wrapper_o">Class 84 template <code class="computeroutput"><span class="identifier">pointer_wrapper</span></code> 85 observer functions</a></span></dt> 86<dt><span class="section"><a href="function_invocation_and_creation/boost_python_ptr_hpp.html#function_invocation_and_creation.boost_python_ptr_hpp.metafunctions">Metafunctions</a></span></dt> 87<dt><span class="section"><a href="function_invocation_and_creation/boost_python_ptr_hpp.html#function_invocation_and_creation.boost_python_ptr_hpp.example">Example</a></span></dt> 88</dl></dd> 89<dt><span class="section"><a href="function_invocation_and_creation/boost_python_raw_function_hpp.html">boost/python/raw_function.hpp</a></span></dt> 90<dd><dl> 91<dt><span class="section"><a href="function_invocation_and_creation/boost_python_raw_function_hpp.html#function_invocation_and_creation.boost_python_raw_function_hpp.introduction">Introduction</a></span></dt> 92<dt><span class="section"><a href="function_invocation_and_creation/boost_python_raw_function_hpp.html#function_invocation_and_creation.boost_python_raw_function_hpp.function_raw_function">Function 93 <code class="computeroutput"><span class="identifier">raw_function</span></code></a></span></dt> 94<dt><span class="section"><a href="function_invocation_and_creation/boost_python_raw_function_hpp.html#function_invocation_and_creation.boost_python_raw_function_hpp.example">Example</a></span></dt> 95</dl></dd> 96<dt><span class="section"><a href="function_invocation_and_creation/function_documentation.html">Function 97 documentation</a></span></dt> 98<dd><dl> 99<dt><span class="section"><a href="function_invocation_and_creation/function_documentation.html#function_invocation_and_creation.function_documentation.boost_python_function_doc_signat">boost/python/function_doc_signature.hpp</a></span></dt> 100<dt><span class="section"><a href="function_invocation_and_creation/function_documentation.html#function_invocation_and_creation.function_documentation.boost_python_pytype_function_hpp">boost/python/pytype_function.hpp</a></span></dt> 101</dl></dd> 102<dt><span class="section"><a href="function_invocation_and_creation/models_of_callpolicies.html">Models 103 of CallPolicies</a></span></dt> 104<dd><dl> 105<dt><span class="section"><a href="function_invocation_and_creation/models_of_callpolicies.html#function_invocation_and_creation.models_of_callpolicies.boost_python_default_call_polici">boost/python/default_call_policies.hpp</a></span></dt> 106<dt><span class="section"><a href="function_invocation_and_creation/models_of_callpolicies.html#function_invocation_and_creation.models_of_callpolicies.boost_python_return_arg_hpp">boost/python/return_arg.hpp</a></span></dt> 107<dt><span class="section"><a href="function_invocation_and_creation/models_of_callpolicies.html#function_invocation_and_creation.models_of_callpolicies.boost_python_return_internal_ref">boost/python/return_internal_reference.hpp</a></span></dt> 108<dt><span class="section"><a href="function_invocation_and_creation/models_of_callpolicies.html#function_invocation_and_creation.models_of_callpolicies.boost_python_return_value_policy">boost/python/return_value_policy.hpp</a></span></dt> 109<dt><span class="section"><a href="function_invocation_and_creation/models_of_callpolicies.html#function_invocation_and_creation.models_of_callpolicies.boost_python_with_custodian_and_">boost/python/with_custodian_and_ward.hpp</a></span></dt> 110</dl></dd> 111<dt><span class="section"><a href="function_invocation_and_creation/models_of_resultconverter.html">Models 112 of ResultConverter</a></span></dt> 113<dd><dl> 114<dt><span class="section"><a href="function_invocation_and_creation/models_of_resultconverter.html#function_invocation_and_creation.models_of_resultconverter.boost_python_to_python_indirect_">boost/python/to_python_indirect.hpp</a></span></dt> 115<dt><span class="section"><a href="function_invocation_and_creation/models_of_resultconverter.html#function_invocation_and_creation.models_of_resultconverter.boost_python_to_python_value_hpp">boost/python/to_python_value.hpp</a></span></dt> 116</dl></dd> 117<dt><span class="section"><a href="function_invocation_and_creation/models_of_resultconvertergenerat.html">Models 118 of ResultConverterGenerator</a></span></dt> 119<dd><dl> 120<dt><span class="section"><a href="function_invocation_and_creation/models_of_resultconvertergenerat.html#function_invocation_and_creation.models_of_resultconvertergenerat.boost_python_copy_const_referenc">boost/python/copy_const_reference.hpp</a></span></dt> 121<dt><span class="section"><a href="function_invocation_and_creation/models_of_resultconvertergenerat.html#function_invocation_and_creation.models_of_resultconvertergenerat.boost_python_copy_non_const_refe">boost/python/copy_non_const_reference.hpp</a></span></dt> 122<dt><span class="section"><a href="function_invocation_and_creation/models_of_resultconvertergenerat.html#function_invocation_and_creation.models_of_resultconvertergenerat.boost_python_manage_new_object_h">boost/python/manage_new_object.hpp</a></span></dt> 123<dt><span class="section"><a href="function_invocation_and_creation/models_of_resultconvertergenerat.html#function_invocation_and_creation.models_of_resultconvertergenerat.boost_python_reference_existing_">boost/python/reference_existing_object.hpp</a></span></dt> 124<dt><span class="section"><a href="function_invocation_and_creation/models_of_resultconvertergenerat.html#function_invocation_and_creation.models_of_resultconvertergenerat.boost_python_return_by_value_hpp">boost/python/return_by_value.hpp</a></span></dt> 125<dt><span class="section"><a href="function_invocation_and_creation/models_of_resultconvertergenerat.html#function_invocation_and_creation.models_of_resultconvertergenerat.boost_python_return_opaque_point">boost/python/return_opaque_pointer.hpp</a></span></dt> 126</dl></dd> 127</dl> 128</div> 129<div class="section"> 130<div class="titlepage"><div><div><h2 class="title" style="clear: both"> 131<a name="function_invocation_and_creation.boost_python_args_hpp"></a><a class="link" href="function_invocation_and_creation.html#function_invocation_and_creation.boost_python_args_hpp" title="boost/python/args.hpp">boost/python/args.hpp</a> 132</h2></div></div></div> 133<div class="toc"><dl class="toc"> 134<dt><span class="section"><a href="function_invocation_and_creation.html#function_invocation_and_creation.boost_python_args_hpp.introduction">Introduction</a></span></dt> 135<dt><span class="section"><a href="function_invocation_and_creation.html#function_invocation_and_creation.boost_python_args_hpp.class_arg">Class 136 <code class="computeroutput"><span class="identifier">arg</span></code></a></span></dt> 137<dt><span class="section"><a href="function_invocation_and_creation.html#function_invocation_and_creation.boost_python_args_hpp.class_arg_constructor">Class 138 <code class="computeroutput"><span class="identifier">arg</span></code> constructor</a></span></dt> 139<dt><span class="section"><a href="function_invocation_and_creation.html#function_invocation_and_creation.boost_python_args_hpp.class_arg_operator">Class 140 <code class="computeroutput"><span class="identifier">arg</span></code> operator=</a></span></dt> 141<dt><span class="section"><a href="function_invocation_and_creation.html#function_invocation_and_creation.boost_python_args_hpp.keyword_expression_operator">Keyword-expression 142 operator,</a></span></dt> 143<dt><span class="section"><a href="function_invocation_and_creation.html#function_invocation_and_creation.boost_python_args_hpp.example">Example</a></span></dt> 144</dl></div> 145<div class="section"> 146<div class="titlepage"><div><div><h3 class="title"> 147<a name="function_invocation_and_creation.boost_python_args_hpp.introduction"></a><a class="link" href="function_invocation_and_creation.html#function_invocation_and_creation.boost_python_args_hpp.introduction" title="Introduction">Introduction</a> 148</h3></div></div></div> 149<div class="toc"><dl class="toc"><dt><span class="section"><a href="function_invocation_and_creation.html#function_invocation_and_creation.boost_python_args_hpp.introduction.keyword_expressions">keyword-expressions</a></span></dt></dl></div> 150<p> 151 Supplies a family of overloaded functions for specifying argument keywords 152 for wrapped C++ functions. 153 </p> 154<div class="section"> 155<div class="titlepage"><div><div><h4 class="title"> 156<a name="function_invocation_and_creation.boost_python_args_hpp.introduction.keyword_expressions"></a><a class="link" href="function_invocation_and_creation.html#function_invocation_and_creation.boost_python_args_hpp.introduction.keyword_expressions" title="keyword-expressions">keyword-expressions</a> 157</h4></div></div></div> 158<p> 159 A keyword-expression results in an object which holds a sequence of 160 <a class="link" href="glossary.html#ntbs">ntbs</a>es, and whose type encodes the number 161 of keywords specified. The keyword-expression may contain default values 162 for some or all of the keywords it holds 163 </p> 164</div> 165</div> 166<div class="section"> 167<div class="titlepage"><div><div><h3 class="title"> 168<a name="function_invocation_and_creation.boost_python_args_hpp.class_arg"></a><a class="link" href="function_invocation_and_creation.html#function_invocation_and_creation.boost_python_args_hpp.class_arg" title="Class arg">Class 169 <code class="computeroutput"><span class="identifier">arg</span></code></a> 170</h3></div></div></div> 171<p> 172 The objects of class arg are keyword-expressions holding one keyword ( 173 size one ) 174 </p> 175<pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span> <span class="keyword">namespace</span> <span class="identifier">python</span> 176<span class="special">{</span> 177 <span class="keyword">struct</span> <span class="identifier">arg</span> 178 <span class="special">{</span> 179 <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">T</span><span class="special">></span> 180 <span class="identifier">arg</span> <span class="special">&</span><span class="keyword">operator</span> <span class="special">=</span> <span class="special">(</span><span class="identifier">T</span> <span class="keyword">const</span> <span class="special">&</span><span class="identifier">value</span><span class="special">);</span> 181 <span class="keyword">explicit</span> <span class="identifier">arg</span> <span class="special">(</span><span class="keyword">char</span> <span class="keyword">const</span> <span class="special">*</span><span class="identifier">name</span><span class="special">){</span><span class="identifier">elements</span><span class="special">[</span><span class="number">0</span><span class="special">].</span><span class="identifier">name</span> <span class="special">=</span> <span class="identifier">name</span><span class="special">;}</span> 182 <span class="special">};</span> 183 184<span class="special">}}</span> 185</pre> 186</div> 187<div class="section"> 188<div class="titlepage"><div><div><h3 class="title"> 189<a name="function_invocation_and_creation.boost_python_args_hpp.class_arg_constructor"></a><a class="link" href="function_invocation_and_creation.html#function_invocation_and_creation.boost_python_args_hpp.class_arg_constructor" title="Class arg constructor">Class 190 <code class="computeroutput"><span class="identifier">arg</span></code> constructor</a> 191</h3></div></div></div> 192<pre class="programlisting"><span class="identifier">arg</span><span class="special">(</span><span class="keyword">char</span> <span class="keyword">const</span><span class="special">*</span> <span class="identifier">name</span><span class="special">);</span></pre> 193<div class="variablelist"> 194<p class="title"><b></b></p> 195<dl class="variablelist"> 196<dt><span class="term">Requires</span></dt> 197<dd><p> 198 The argument must be a <a class="link" href="glossary.html#ntbs">ntbs</a>. 199 </p></dd> 200<dt><span class="term">Effects</span></dt> 201<dd><p> 202 Constructs an arg object holding a keyword with name name. 203 </p></dd> 204</dl> 205</div> 206</div> 207<div class="section"> 208<div class="titlepage"><div><div><h3 class="title"> 209<a name="function_invocation_and_creation.boost_python_args_hpp.class_arg_operator"></a><a class="link" href="function_invocation_and_creation.html#function_invocation_and_creation.boost_python_args_hpp.class_arg_operator" title="Class arg operator=">Class 210 <code class="computeroutput"><span class="identifier">arg</span></code> operator=</a> 211</h3></div></div></div> 212<pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">T</span><span class="special">></span> <span class="identifier">arg</span> <span class="special">&</span><span class="keyword">operator</span> <span class="special">=</span> <span class="special">(</span><span class="identifier">T</span> <span class="keyword">const</span> <span class="special">&</span><span class="identifier">value</span><span class="special">);</span></pre> 213<div class="variablelist"> 214<p class="title"><b></b></p> 215<dl class="variablelist"> 216<dt><span class="term">Requires</span></dt> 217<dd><p> 218 The argument must convertible to python. 219 </p></dd> 220<dt><span class="term">Effects</span></dt> 221<dd><p> 222 Assigns default value for the keyword. 223 </p></dd> 224<dt><span class="term">Returns</span></dt> 225<dd><p> 226 Reference to <code class="computeroutput"><span class="keyword">this</span></code>. 227 </p></dd> 228</dl> 229</div> 230</div> 231<div class="section"> 232<div class="titlepage"><div><div><h3 class="title"> 233<a name="function_invocation_and_creation.boost_python_args_hpp.keyword_expression_operator"></a><a class="link" href="function_invocation_and_creation.html#function_invocation_and_creation.boost_python_args_hpp.keyword_expression_operator" title="Keyword-expression operator,">Keyword-expression 234 operator,</a> 235</h3></div></div></div> 236<pre class="programlisting"><span class="identifier">keyword</span><span class="special">-</span><span class="identifier">expression</span> <span class="keyword">operator</span> <span class="special">,</span> <span class="special">(</span><span class="identifier">keyword</span><span class="special">-</span><span class="identifier">expression</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">arg</span> <span class="special">&</span><span class="identifier">kw</span><span class="special">)</span> <span class="keyword">const</span> 237<span class="identifier">keyword</span><span class="special">-</span><span class="identifier">expression</span> <span class="keyword">operator</span> <span class="special">,</span> <span class="special">(</span><span class="identifier">keyword</span><span class="special">-</span><span class="identifier">expression</span><span class="special">,</span> <span class="keyword">const</span> <span class="keyword">char</span> <span class="special">*</span><span class="identifier">name</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> 238</pre> 239<div class="variablelist"> 240<p class="title"><b></b></p> 241<dl class="variablelist"> 242<dt><span class="term">Requires</span></dt> 243<dd><p> 244 The argument name must be a <a class="link" href="glossary.html#ntbs">ntbs</a>. 245 </p></dd> 246<dt><span class="term">Effects</span></dt> 247<dd><p> 248 Extends the keyword-expression argument with one more keyword. 249 </p></dd> 250<dt><span class="term">Returns</span></dt> 251<dd><p> 252 The extended keyword-expression. 253 </p></dd> 254</dl> 255</div> 256</div> 257<div class="section"> 258<div class="titlepage"><div><div><h3 class="title"> 259<a name="function_invocation_and_creation.boost_python_args_hpp.example"></a><a class="link" href="function_invocation_and_creation.html#function_invocation_and_creation.boost_python_args_hpp.example" title="Example">Example</a> 260</h3></div></div></div> 261<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">python</span><span class="special">/</span><span class="identifier">def</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 262<span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">python</span><span class="special">;</span> 263 264<span class="keyword">int</span> <span class="identifier">f</span><span class="special">(</span><span class="keyword">double</span> <span class="identifier">x</span><span class="special">,</span> <span class="keyword">double</span> <span class="identifier">y</span><span class="special">,</span> <span class="keyword">double</span> <span class="identifier">z</span><span class="special">=</span><span class="number">0.0</span><span class="special">,</span> <span class="keyword">double</span> <span class="identifier">w</span><span class="special">=</span><span class="number">1.0</span><span class="special">);</span> 265 266<span class="identifier">BOOST_PYTHON_MODULE</span><span class="special">(</span><span class="identifier">xxx</span><span class="special">)</span> 267<span class="special">{</span> 268 <span class="identifier">def</span><span class="special">(</span><span class="string">"f"</span><span class="special">,</span> <span class="identifier">f</span><span class="special">,</span> <span class="special">(</span><span class="identifier">arg</span><span class="special">(</span><span class="string">"x"</span><span class="special">),</span> <span class="string">"y"</span><span class="special">,</span> <span class="identifier">arg</span><span class="special">(</span><span class="string">"z"</span><span class="special">)=</span><span class="number">0.0</span><span class="special">,</span> <span class="identifier">arg</span><span class="special">(</span><span class="string">"w"</span><span class="special">)=</span><span class="number">1.0</span><span class="special">));</span> 269<span class="special">}</span> 270</pre> 271</div> 272</div> 273</div> 274<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 275<td align="left"></td> 276<td align="right"><div class="copyright-footer">Copyright © 2002-2005, 2015 David Abrahams, Stefan Seefeld<p> 277 Distributed under the Boost Software License, Version 1.0. (See accompanying 278 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> 279 </p> 280</div></td> 281</tr></table> 282<hr> 283<div class="spirit-nav"> 284<a accesskey="p" href="object_wrappers/boost_python_tuple_hpp.html"><img src="../images/prev.png" alt="Prev"></a><a accesskey="u" href="index.html"><img src="../images/up.png" alt="Up"></a><a accesskey="h" href="index.html"><img src="../images/home.png" alt="Home"></a><a accesskey="n" href="function_invocation_and_creation/boost_python_call_hpp.html"><img src="../images/next.png" alt="Next"></a> 285</div> 286</body> 287</html> 288
