[Boost-users] Boost Graph: vertex class has no copy constructor

Subject: [Boost-users] Boost Graph: vertex class has no copy constructor
From: Trevor Harmon (trevor.w.harmon_at_[hidden])
Date: 2010-03-25 20:23:41

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<Tag, T, Base>::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<boost::vertex_bundle_t,  
llvm::BasicBlock, boost::no_property>::property(const  
boost::property<boost::vertex_bundle_t, llvm::BasicBlock,  
boost::no_property>&)’:
/Users/twharmon/Development/boost_1_42_0/boost/pending/property.hpp: 
22:   instantiated from ‘typename boost::adjacency_list<boost::listS,  
boost::listS, boost::bidirectionalS,  
boost::property<boost::vertex_index_t, unsigned int, typename  
boost::graph_detail::vertex_prop<Prop>::type>,  
boost::property<boost::edge_index_t, unsigned int, typename  
boost::graph_detail::edge_prop<EdgeProp>::type>, GraphProp,  
boost::listS>::vertex_descriptor boost::directed_graph<VertexProp,  
EdgeProp, GraphProp>::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<VertexProp, EdgeProp,  
GraphProp>::vertex_descriptor boost::add_vertex(const typename  
boost::directed_graph<VertexProp, EdgeProp,  
GraphProp>::vertex_property_type&, boost::directed_graph<VP, EP, GP>&)  
[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<boost::vertex_index_t, unsigned  
int, boost::property<boost::vertex_bundle_t, llvm::BasicBlock,  
boost::no_property> >::property(const  
boost::property<boost::vertex_index_t, unsigned int,  
boost::property<boost::vertex_bundle_t, llvm::BasicBlock,  
boost::no_property> >&)’:
/Users/twharmon/Development/boost_1_42_0/boost/pending/property.hpp: 
22: warning: synthesized method  
‘boost::property<boost::vertex_bundle_t, llvm::BasicBlock,  
boost::no_property>::property(const  
boost::property<boost::vertex_bundle_t, llvm::BasicBlock,  
boost::no_property>&)’ first required here
/Users/twharmon/Development/boost_1_42_0/boost/graph/ 
directed_graph.hpp: In member function ‘typename  
boost::adjacency_list<boost::listS, boost::listS,  
boost::bidirectionalS, boost::property<boost::vertex_index_t, unsigned  
int, typename boost::graph_detail::vertex_prop<Prop>::type>,  
boost::property<boost::edge_index_t, unsigned int, typename  
boost::graph_detail::edge_prop<EdgeProp>::type>, GraphProp,  
boost::listS>::vertex_descriptor boost::directed_graph<VertexProp,  
EdgeProp, GraphProp>::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<boost::vertex_index_t, unsigned int,  
boost::property<boost::vertex_bundle_t, llvm::BasicBlock,  
boost::no_property> >::property(const  
boost::property<boost::vertex_index_t, unsigned int,  
boost::property<boost::vertex_bundle_t, llvm::BasicBlock,  
boost::no_property> >&)’ first required here