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<Title>Boost Graph Library: Copy Graph</Title>
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<H1><TT>copy_graph</TT></H1>
<PRE>
template <class <a href="./VertexListGraph.html">VertexListGraph</a>, class <a href="./MutableGraph.html">MutableGraph</a>>
void copy_graph(const VertexListGraph& G, MutableGraph& G_copy,
const bgl_named_params<P, T, R>& params = <i>all defaults</i>)
</PRE>
This function copies all of the vertices and edges from graph
<tt>G</tt> into <tt>G_copy</tt>. Also, it copies the vertex and edge
properties, either by using the <tt>vertex_all</tt> and
<tt>edge_all</tt> property maps, or by user-supplied copy functions.
<H3>Where Defined</H3>
<P>
<a href="../../../boost/graph/copy.hpp"><TT>boost/graph/copy.hpp</TT></a>
<P>
<H3>Parameters</H3>
IN: <tt>const VertexListGraph& G</tt>
<blockquote>
A directed or undirected graph. The graph type must be a model of <a href="./VertexListGraph.html">Vertex List Graph</a>.
</blockquote>
OUT: <tt>MutableGraph& G_copy</tt>
<blockquote>
The resulting copy of the graph. The graph type must be a model of <a
href="./MutableGraph.html">Mutable Graph</a>.
</blockquote>
<h3>Named Parameters</h3>
IN: <tt>vertex_copy(VertexCopier vc)</tt>
<blockquote>
This is a <a href="http://www.sgi.com/tech/stl/BinaryFunction.html">Binary Function</a> that copies the properties of a vertex in the original graph
into the corresponding vertex in the copy.<br>
<b>Default:</b> <tt>vertex_copier<VertexListGraph, MutableGraph></tt>
which uses the property tag <tt>vertex_all</tt> to access a property
map from the graph.
</blockquote>
IN: <tt>edge_copy(EdgeCopier ec)</tt>
<blockquote>
This is a <a href="http://www.sgi.com/tech/stl/BinaryFunction.html">Binary Function</a> that copies the properties of an edge in the original graph
into the corresponding edge in the copy.<br>
<b>Default:</b> <tt>edge_copier<VertexListGraph, MutableGraph></tt>
which uses the property tag <tt>edge_all</tt> to access a property
map from the graph.
</blockquote>
IN: <tt>vertex_index_map(VertexIndexMap i_map)</tt>
<blockquote>
The vertex index map type must be a model of <a
href="../../property_map/doc/ReadablePropertyMap.html">Readable Property
Map</a> and must map the vertex descriptors of <tt>G</tt> to the
integers in the half-open range <tt>[0,num_vertices(G))</tt>.<br>
<b>Default:</b> <tt>get(vertex_index, G)</tt>.
Note: if you use this default, make sure your graph has
an internal <tt>vertex_index</tt> property. For example,
<tt>adjacenty_list</tt> with <tt>VertexList=listS</tt> does
not have an internal <tt>vertex_index</tt> property.
</blockquote>
UTIL/OUT: <tt>orig_to_copy(Orig2CopyMap c)</tt>
<blockquote>
This maps vertices in the original graph to vertices in the copy.
<b>Default:</b> an <a
href="../../property_map/doc/iterator_property_map.html">
</tt>iterator_property_map</tt></a> created from a
<tt>std::vector</tt> of the output graph's vertex descriptor type of size
<tt>num_vertices(g)</tt> and using the <tt>i_map</tt> for the index
map.
</blockquote>
<H3>Complexity</H3>
<P>
The time complexity is <i>O(V + E)</i>.
<br>
<HR>
<TABLE>
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<TD nowrap>Copyright © 2000-2001</TD><TD>
<A HREF="http://www.boost.org/people/jeremy_siek.htm">Jeremy Siek</A>, Indiana University (<A HREF="mailto:jsiek@osl.iu.edu">jsiek@osl.iu.edu</A>)
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