stored_edge_property's copy constructor is implicitly deleted for some compilers

[dave.lowell@…]

Stored_edge_property has two possible definitions, depending upon the compiler used. With MSVC or gcc less than 4.6, it is given both a copy constructor and a move constructor. With other compilers, it is given a default move constructor, and its copy constructor is implicitly deleted.

This causes compiler errors in some unexpected places. I've attached an example which gives a compiler error when compiled with gcc 4.7.2 using c++11. I've observed the same issue on clang, although I haven't been able to create a simple reproduction for it there.

[dave.lowell@…]

reproduction code