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tidy
[SVN r26026]
This commit is contained in:
Dave Abrahams
@@ -13,7 +13,7 @@
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p.c3 {font-style: italic}
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<h2><a name="high_level">High Level Components</a></h2>
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<dl>
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<dt><a href="class.html">class.hpp/class_fwd.hpp</a></dt>
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<dt><a href="class.html#class_-spec">class_</a></dt>
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<dt><a href="class.html#bases-spec">bases</a></dt>
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<dt><a href="class.html#classes">Classes</a></dt>
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<dt><a href="class.html#class_-spec">class_</a></dt>
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<dt><a href="class.html#bases-spec">bases</a></dt>
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<dt><a href="def.html#functions">Functions</a></dt>
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</dd>
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<dt><a href="def_visitor.html">def_visitor.hpp</a></dt>
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<dl class="index">
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<dt><a href="def_visitor.html#classes">Classes</a></dt>
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<dt><a href="enum.html#classes">Classes</a></dt>
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<dt><a href="enum.html#enum_-spec">enum_</a></dt>
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<dt><a href="def_visitor.html#classes">Classes</a></dt>
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</dd>
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<dt><a href="errors.html">errors.hpp</a></dt>
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<dl class="index">
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<dt><a href="errors.html#classes">Classes</a></dt>
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<dt><a href="enum.html">enum.hpp</a></dt>
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<dt><a href="enum.html#classes">Classes</a></dt>
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<dt><a href="enum.html#enum_-spec">enum_</a></dt>
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<dt><a href="errors.html">errors.hpp</a></dt>
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<dt><a href="errors.html#classes">Classes</a></dt>
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<dt><a href=
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"errors.html#error_already_set-spec">error_already_set</a></dt>
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<dt><a href=
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</dl>
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<dt><a href="errors.html#functions">Functions</a></dt>
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<dd>
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<dl class="index">
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<dt><a href=
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"errors.html#handle_exception-spec">handle_exception</a></dt>
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<dt><a href=
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<dt><a href=
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"errors.html#expect_non_null-spec">expect_non_null</a></dt>
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<dt><a href=
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<dt><a href=
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"errors.html#throw_error_already_set-spec">throw_error_already_set</a></dt>
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</dd>
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</dl>
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</dd>
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<dt><a href=
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"exception_translator.html">exception_translator.hpp</a></dt>
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<dd>
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<dl class="index">
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<dt><a href=
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"exception_translator.html">exception_translator.hpp</a></dt>
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<dd>
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<dl class="index">
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<dt><a href=
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"exception_translator.html#functions">Functions</a></dt>
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<dd>
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<dl class="index">
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<dd>
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<dl class="index">
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<dt><a href=
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"exception_translator.html#register_exception_translator-spec">register_exception_translator</a></dt>
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</dl>
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</dl>
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</dd>
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<dt><a href="init.html">init.hpp</a></dt>
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<dd>
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<dl class="index">
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<dt><a href="init.html#classes">Classes</a></dt>
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<dd>
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<dt><a href="init.html">init.hpp</a></dt>
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<dl class="index">
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<dt><a href="init.html#init-spec">init</a></dt>
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<dt><a href="init.html#optional-spec">optional</a></dt>
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<dt><a href="init.html#classes">Classes</a></dt>
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<dd>
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<dl class="index">
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<dt><a href="init.html#init-spec">init</a></dt>
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<dt><a href="init.html#optional-spec">optional</a></dt>
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</dl>
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</dd>
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</dl>
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</dd>
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</dl>
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</dd>
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<dt><a href="iterator.html">iterator.hpp</a></dt>
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<dd>
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<dl class="index">
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<dt><a href="iterator.html#classes">Classes</a></dt>
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<dd>
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<dt><a href="iterator.html">iterator.hpp</a></dt>
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<dd>
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<dl class="index">
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<dt><a href="iterator.html#iterator-spec">iterator</a></dt>
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<dt><a href="iterator.html#iterators-spec">iterators</a></dt>
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<dt><a href="iterator.html#classes">Classes</a></dt>
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<dd>
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<dl class="index">
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<dt><a href="iterator.html#iterator-spec">iterator</a></dt>
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<dt><a href="iterator.html#iterators-spec">iterators</a></dt>
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</dl>
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<dt><a href="iterator.html#functions">Functions</a></dt>
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<dl class="index">
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<dt><a href="iterator.html#range-spec">range</a></dt>
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<dt><a href="iterator.html#functions">Functions</a></dt>
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<dd>
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<dt><a href="module.html">module.hpp</a></dt>
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<dd>
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<dl class="index">
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<dt><a href="iterator.html#range-spec">range</a></dt>
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</dl>
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</dd>
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</dl>
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</dd>
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<dt><a href="module.html">module.hpp</a></dt>
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<dd>
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<dl class="index">
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<dt><a href="module.html#macros">Macros</a></dt>
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<dd>
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<dl class="index">
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<dt><a href=
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<dt><a href="module.html#macros">Macros</a></dt>
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<dd>
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<dl class="index">
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<dt><a href=
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"module.html#BOOST_PYTHON_MODULE-spec">BOOST_PYTHON_MODULE</a></dt>
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</dl>
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</dd>
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</dl>
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</dd>
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</dl>
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</dd>
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<dt><a href="operators.html">operators.hpp</a></dt>
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<dd>
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<dl class="index">
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<dt><a href="operators.html#classes">Classes</a></dt>
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<dd>
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<dl class="index">
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<dt><a href="operators.html#self_t-spec">self_t</a></dt>
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<dt><a href="operators.html#other-spec">other</a></dt>
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<dt><a href="operators.html#operator_-spec">operator_</a></dt>
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</dl>
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<dt><a href="operators.html#objects">Objects</a></dt>
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<dd>
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<dl class="index">
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<dt><a href="operators.html#self-spec">self</a></dt>
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</dl>
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</dd>
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</dl>
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</dd>
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<dt><a href="scope.html">scope.hpp</a></dt>
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<dd>
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<dl class="index">
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<dt><a href="scope.html#classes">Classes</a></dt>
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<dl class="index">
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<dt><a href="scope.html#scope-spec">scope</a></dt>
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</dd>
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</dl>
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<dt><a href="wrapper.html">wrapper.hpp</a></dt>
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<dl class="index">
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<dt><a href="wrapper.html#classes">Classes</a></dt>
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<dt><a href="operators.html">operators.hpp</a></dt>
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<dd>
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<dl class="index">
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<dt><a href="wrapper.html#override-spec">override</a></dt>
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<dt><a href="wrapper.html#wrapper-spec">wrapper</a></dt>
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<dt><a href="operators.html#classes">Classes</a></dt>
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<dl class="index">
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<dt><a href="operators.html#self_t-spec">self_t</a></dt>
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<dt><a href="operators.html#other-spec">other</a></dt>
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<dt><a href="operators.html#operator_-spec">operator_</a></dt>
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<dt><a href="operators.html#objects">Objects</a></dt>
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<dt><a href="operators.html#self-spec">self</a></dt>
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<dd>
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<dl class="index">
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<dt><a href="scope.html#classes">Classes</a></dt>
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<dt><a href="scope.html#scope-spec">scope</a></dt>
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<dl class="index">
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<dt><a href="wrapper.html#classes">Classes</a></dt>
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<dl class="index">
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<dt><a href="wrapper.html#override-spec">override</a></dt>
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<dt><a href="wrapper.html#wrapper-spec">wrapper</a></dt>
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</dd>
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</dl>
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<h2><a name="object_wrappers">Object Wrappers</a></h2>
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@@ -371,6 +416,7 @@
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</dd>
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</dl>
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</dd>
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<dt><a href="slice.html">slice.hpp</a></dt>
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<dd>
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@@ -992,17 +1038,19 @@
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<h2><a name="topics">Topics</a></h2>
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<dl>
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<dt><a href="callbacks.html">Calling Python Functions and Methods</a></dt>
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<dt><a href="pickle.html">Pickle Support</a><br>
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<a href="indexing.html">Indexing Support</a></dt>
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</dl>
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<dl>
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<dt><a href="callbacks.html">Calling Python Functions and
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Methods</a></dt>
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<dt><a href="pickle.html">Pickle Support</a><br>
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<a href="indexing.html">Indexing Support</a></dt>
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</dl>
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<hr>
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<p>Revised
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<!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
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19 July, 2003 <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
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31 October, 2004
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<!--webbot bot="Timestamp" endspan i-checksum="39359" -->
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</p>
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<p class="c3">© Copyright <a href=
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@@ -22,57 +22,63 @@
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<h2>Contents</h2>
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<dl class="page-index">
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<dt><a href="#introduction">Introduction</a>
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<dt><a href="#introduction">Introduction</a></dt>
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<dt><a href="#classes">Classes</a>
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<dt><a href="#classes">Classes</a></dt>
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<dd>
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<dl class="page-index">
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<dt><a href="#override-spec">Class template <code>override</code></a>
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<dt><a href="#override-spec">Class template
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<code>override</code></a></dt>
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<dd>
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<dl class="page-index">
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<dt><a href="#override-spec-synopsis">Class <code>override</code> synopsis</a>
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<dt><a href="#override-spec-observers">Class <code>override</code> observer functions</a>
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<dt><a href="#override-spec-synopsis">Class
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<code>override</code> synopsis</a></dt>
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<dt><a href="#override-spec-observers">Class
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<code>override</code> observer functions</a></dt>
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</dl>
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</dd>
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<dt><a href="#wrapper-spec">Class template <code>wrapper</code></a>
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<dt><a href="#wrapper-spec">Class template
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<code>wrapper</code></a></dt>
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||||
<dd>
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<dl class="page-index">
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<dt><a href="#wrapper-spec-synopsis">Class <code>wrapper</code> synopsis</a>
|
||||
|
||||
<dt><a href="#wrapper-spec-observers">Class <code>wrapper</code> observer functions</a>
|
||||
<dt><a href="#wrapper-spec-synopsis">Class <code>wrapper</code>
|
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synopsis</a></dt>
|
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<dt><a href="#wrapper-spec-observers">Class
|
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<code>wrapper</code> observer functions</a></dt>
|
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</dl>
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</dd>
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</dl>
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</dd>
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<dt><a href="#examples">Example(s)</a>
|
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<dt><a href="#examples">Example(s)</a></dt>
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</dl>
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<hr>
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<h2><a name="introduction"></a>Introduction</h2>
|
||||
|
||||
<p>To wrap a class <code>T</code> such that its virtual functions
|
||||
can be "overridden in Python"—so that the corresponding
|
||||
method of a Python derived class will be called when the virtual
|
||||
function is invoked from C++—you must create a C++ wrapper
|
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class derived from ``T`` that overrides those virtual functions so
|
||||
that they call into Python. This header contains classes that can
|
||||
be used to make that job easier.
|
||||
<p>To wrap a class <code>T</code> such that its virtual functions can be
|
||||
"overridden in Python"—so that the corresponding method of a Python
|
||||
derived class will be called when the virtual function is invoked from
|
||||
C++—you must create a C++ wrapper class derived from ``T`` that
|
||||
overrides those virtual functions so that they call into Python. This
|
||||
header contains classes that can be used to make that job easier.</p>
|
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<h2><a name="classes"></a>Classes</h2>
|
||||
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||||
<h3><a name="override-spec"></a>Class <code>override</code></h3>
|
||||
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||||
<p>Encapsulates a Python override of a C++ virtual function.
|
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An <code>override</code> object either holds a callable Python
|
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object or <code>None</code>.
|
||||
<p>Encapsulates a Python override of a C++ virtual function. An
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<code>override</code> object either holds a callable Python object or
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<code>None</code>.</p>
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<h4><a name="override-spec-synopsis"></a>Class <code>override</code> synopsis</h4>
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||||
<h4><a name="override-spec-synopsis"></a>Class <code>override</code>
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synopsis</h4>
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<pre>
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namespace boost
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{
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||||
@@ -91,8 +97,8 @@ namespace boost
|
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};
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</pre>
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<h4><a name="override-spec-observers"></a>Class <code>override</code> observer
|
||||
functions</h4>
|
||||
<h4><a name="override-spec-observers"></a>Class <code>override</code>
|
||||
observer functions</h4>
|
||||
<pre>
|
||||
<i>unspecified</i> operator() const;
|
||||
template <class A0>
|
||||
@@ -105,26 +111,27 @@ template <class A0, class A1, ...class A<i>n</i>>
|
||||
</pre>
|
||||
|
||||
<dl class="function-semantics">
|
||||
<dt><b>Effects:</b> If <code>*this</code> holds a callable
|
||||
Python object, it is invoked with the specified arguments in
|
||||
the manner specified <a href="callbacks.html">here</a>. Otherwise, throws <code>
|
||||
<a href="errors.html#error_already_set-spec">error_already_set</a>
|
||||
</code>.
|
||||
<dt><b>Effects:</b> If <code>*this</code> holds a callable Python
|
||||
object, it is invoked with the specified arguments in the manner
|
||||
specified <a href="callbacks.html">here</a>. Otherwise, throws <code><a
|
||||
href="errors.html#error_already_set-spec">error_already_set</a></code>
|
||||
.</dt>
|
||||
|
||||
<dt><b>Returns:</b> An object of unspecified type that holds the
|
||||
Python result of the invocation and, when converted to a C++
|
||||
type <code>R</code>, attempts to convert that result object
|
||||
to <code>R</code>. If that conversion fails, throws <code>
|
||||
<a href="errors.html#error_already_set-spec">error_already_set</a>
|
||||
</code>.
|
||||
<dt><b>Returns:</b> An object of unspecified type that holds the Python
|
||||
result of the invocation and, when converted to a C++ type
|
||||
<code>R</code>, attempts to convert that result object to
|
||||
<code>R</code>. If that conversion fails, throws <code><a href=
|
||||
"errors.html#error_already_set-spec">error_already_set</a></code>
|
||||
.</dt>
|
||||
</dl>
|
||||
|
||||
<h3><a name="wrapper-spec"></a>Class template <code>wrapper</code></h3>
|
||||
|
||||
<p>Deriving your wrapper class from both ``T`` <i>and</i>
|
||||
``wrapper<T> makes writing that derived class easier.
|
||||
``wrapper<T> makes writing that derived class easier.</p>
|
||||
|
||||
<h4><a name="wrapper-spec-synopsis"></a>Class template <code>wrapper</code> synopsis</h4>
|
||||
<h4><a name="wrapper-spec-synopsis"></a>Class template
|
||||
<code>wrapper</code> synopsis</h4>
|
||||
<pre>
|
||||
namespace boost
|
||||
{
|
||||
@@ -136,27 +143,24 @@ namespace boost
|
||||
};
|
||||
</pre>
|
||||
|
||||
<h4><a name="wrapper-spec-observers"></a>Class <code>wrapper</code> observer
|
||||
functions</h4>
|
||||
<h4><a name="wrapper-spec-observers"></a>Class <code>wrapper</code>
|
||||
observer functions</h4>
|
||||
<pre>
|
||||
override get_override(char const* name) const;
|
||||
</pre>
|
||||
|
||||
<dl class="function-semantics">
|
||||
<dt><b>Requires:</b> <code>name</code> is a <a href="definitions.html#ntbs">ntbs</a>.
|
||||
<dt><b>Requires:</b> <code>name</code> is a <a href=
|
||||
"definitions.html#ntbs">ntbs</a>.</dt>
|
||||
|
||||
<dt><b>Returns:</b> If <code>*this</code> is the C++ base class
|
||||
subobject of a Python derived class instance that overrides
|
||||
the named function, returns an <code>override</code> object
|
||||
that delegates to the Python override. Otherwise,
|
||||
returns an <code>
|
||||
override
|
||||
</code>
|
||||
object that holds <code>None</code>.
|
||||
subobject of a Python derived class instance that overrides the named
|
||||
function, returns an <code>override</code> object that delegates to the
|
||||
Python override. Otherwise, returns an <code>override</code> object
|
||||
that holds <code>None</code>.</dt>
|
||||
</dl>
|
||||
|
||||
<h2><a name="examples"></a>Example</h2>
|
||||
|
||||
<pre>
|
||||
#include <boost/python/module.hpp>
|
||||
#include <boost/python/class.hpp>
|
||||
@@ -170,7 +174,7 @@ struct P
|
||||
{
|
||||
virtual ~P(){}
|
||||
virtual char const* f() = 0;
|
||||
char const* g() { return "P::g()"; }
|
||||
char const* g() { return "P::g()"; }
|
||||
};
|
||||
|
||||
struct PCallback : P, wrapper<P>
|
||||
@@ -178,9 +182,9 @@ struct PCallback : P, wrapper<P>
|
||||
char const* f()
|
||||
{
|
||||
#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) // Workaround for vc6/vc7
|
||||
return call<char const*>(this->get_override("f").ptr());
|
||||
return call<char const*>(this->get_override("f").ptr());
|
||||
#else
|
||||
return this->get_override("f")();
|
||||
return this->get_override("f")();
|
||||
#endif
|
||||
}
|
||||
};
|
||||
@@ -189,14 +193,14 @@ struct PCallback : P, wrapper<P>
|
||||
struct A
|
||||
{
|
||||
virtual ~A(){}
|
||||
virtual char const* f() { return "A::f()"; }
|
||||
virtual char const* f() { return "A::f()"; }
|
||||
};
|
||||
|
||||
struct ACallback : A, wrapper<A>
|
||||
{
|
||||
char const* f()
|
||||
{
|
||||
if (override f = this->get_override("f"))
|
||||
if (override f = this->get_override("f"))
|
||||
#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) // Workaround for vc6/vc7
|
||||
return call<char const*>(f.ptr());
|
||||
#else
|
||||
@@ -211,19 +215,20 @@ struct ACallback : A, wrapper<A>
|
||||
|
||||
BOOST_PYTHON_MODULE_INIT(polymorphism)
|
||||
{
|
||||
class_<PCallback,boost::noncopyable>("P")
|
||||
.def("f", pure_virtual(&P::f))
|
||||
class_<PCallback,boost::noncopyable>("P")
|
||||
.def("f", pure_virtual(&P::f))
|
||||
;
|
||||
|
||||
class_<ACallback,boost::noncopyable>("A")
|
||||
.def("f", &A::f, &ACallback::default_f)
|
||||
class_<ACallback,boost::noncopyable>("A")
|
||||
.def("f", &A::f, &ACallback::default_f)
|
||||
;
|
||||
}
|
||||
</pre>
|
||||
|
||||
<p>Revised
|
||||
<!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
|
||||
31 October, 2004
|
||||
<!--webbot bot="Timestamp" endspan i-checksum="39359" -->
|
||||
31 October, 2004
|
||||
<!--webbot bot="Timestamp" endspan i-checksum="39359" -->
|
||||
|
||||
|
||||
<p><i>© Copyright <a href="../../../../people/dave_abrahams.htm">Dave
|
||||
|
||||
Reference in New Issue
Block a user