CPX_LAZYCONSTRAINTCALLBACK_USER

This is the value returned by CPXXcallbackgetinfoint/CPXcallbackgetinfoint when querying CPXCALLBACKINFO_CANDIDATE_SOURCE and the CANDIDATE context was invoked for a solution that originated from a solution vector posted by the user.

Note that this is not returned by CPXXgetcallbacknodeinfo/CPXgetcallbacknodeinfo when querying CPX_CALLBACK_INFO_LAZY_SOURCE! In the legacy callback framework, callbacks assume that solutions posted by the user satisfy lazy constraints. Only the generic callback framework checks lazy constraints for solutions injected by the user.