<HTML> <!-- Copyright (c) Jeremy Siek 2002 Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) --> <Head> <Title>Boost Graph Library: Exceptions</Title> <BODY BGCOLOR="#ffffff" LINK="#0000ee" TEXT="#000000" VLINK="#551a8b" ALINK="#ff0000"> <IMG SRC="../../../boost.png" ALT="C++ Boost" width="277" height="86"> <BR Clear> <h1><a href="../../../boost/graph/exception.hpp"><tt>boost/graph/exception.hpp</tt></a></h1> <P> The BGL defines several exception classes for reporting errors from BGL algorithms. Many of the BGL algorithms place certain requirements on the input graph. If these requirements are not met then the algorithm can not successfully complete, and instead throws the appropriate exception. </P> <h3>Synopsis</h3> <pre> struct <a name="bad_graph">bad_graph</a> : public invalid_argument { bad_graph(const string& what_arg); }; struct <a name="not_a_dag">not_a_dag</a> : public bad_graph { not_a_dag(); }; struct <a name="negative_edge">negative_edge</a> : public bad_graph { negative_edge(); }; struct <a name="negative_cycle">negative_cycle</a> : public bad_graph { negative_cycle(); }; struct <a name="not_connected">not_connected</a> : public bad_graph { not_connected(); }; </pre>