Hi, I'm using the Boost Graph library to construct a directed graph: typedef boost::directed_graph<BasicBlock> Graph; The vertex class, "BasicBlock", is not my own; it comes from the LLVM project. Unfortunately, the declaration above causes a slew of compiler errors (see below) that appear to be related to BasicBlock's copy constructor. Sure enough, I checked BasicBlock.h, and its copy constructor is declared private and is not even implemented. There appears to be some sort of design issue that prevents this class from having a copy constructor. Is there some workaround for this on the Boost Graph side, or must vertex classes always have a copy constructor? Thanks, Trevor /Users/twharmon/Development/boost_1_42_0/boost/pending/property.hpp: In constructor ‘boost::property::property(const T&) [with Tag = boost::vertex_bundle_t, T = llvm::BasicBlock, Base = boost::no_property]’: Clepsydra.cpp:46: instantiated from here /Users/twharmon/Development/LLVM/llvm-2.7/llvm-2.7-src/include/llvm/ BasicBlock.h:81: error: ‘llvm::BasicBlock::BasicBlock(const llvm::BasicBlock&)’ is private /Users/twharmon/Development/boost_1_42_0/boost/pending/property.hpp: 31: error: within this context /Users/twharmon/Development/boost_1_42_0/boost/pending/property.hpp: In copy constructor ‘boost::property::property(const boost::property&)’: /Users/twharmon/Development/boost_1_42_0/boost/pending/property.hpp: 22: instantiated from ‘typename boost::adjacency_list, boost::property, GraphProp, boost::listS>::vertex_descriptor boost::directed_graph::add_vertex(const typename boost::graph_detail::vertex_prop<Prop>::type&) [with VertexProp = llvm::BasicBlock, EdgeProp = boost::no_property, GraphProp = boost::no_property]’ /Users/twharmon/Development/boost_1_42_0/boost/graph/ directed_graph.hpp:454: instantiated from ‘typename boost::directed_graph::vertex_descriptor boost::add_vertex(const typename boost::directed_graph::vertex_property_type&, boost::directed_graph&) [with VP = llvm::BasicBlock, EP = boost::no_property, GP = boost::no_property]’ Clepsydra.cpp:46: instantiated from here /Users/twharmon/Development/LLVM/llvm-2.7/llvm-2.7-src/include/llvm/ BasicBlock.h:81: error: ‘llvm::BasicBlock::BasicBlock(const llvm::BasicBlock&)’ is private /Users/twharmon/Development/boost_1_42_0/boost/pending/property.hpp: 22: error: within this context cc1plus: warnings being treated as errors /Users/twharmon/Development/boost_1_42_0/boost/pending/property.hpp: In copy constructor ‘boost::property >::property(const boost::property >&)’: /Users/twharmon/Development/boost_1_42_0/boost/pending/property.hpp: 22: warning: synthesized method ‘boost::property::property(const boost::property&)’ first required here /Users/twharmon/Development/boost_1_42_0/boost/graph/ directed_graph.hpp: In member function ‘typename boost::adjacency_list, boost::property, GraphProp, boost::listS>::vertex_descriptor boost::directed_graph::add_vertex(const typename boost::graph_detail::vertex_prop<Prop>::type&) [with VertexProp = llvm::BasicBlock, EdgeProp = boost::no_property, GraphProp = boost::no_property]’: /Users/twharmon/Development/boost_1_42_0/boost/graph/ directed_graph.hpp:154: warning: synthesized method ‘boost::property >::property(const boost::property >&)’ first required here