C++ Reference: class PathOperator

Note: This documentation is automatically generated.

Base class of the local search operators dedicated to path modifications (a path is a set of nodes linked together by arcs). This family of neighborhoods supposes they are handling next variables representing the arcs (var[i] represents the node immediately after i on a path). Several services are provided:
   - arc manipulators (SetNext(), ReverseChain(), MoveChain())
   - path inspectors (Next(), Prev(), IsPathEnd())
   - path iterators: operators need a given number of nodes to define a neighbor; this class provides the iteration on a given number of (base) nodes which can be used to define a neighbor (through the BaseNode method)
Subclasses only need to override MakeNeighbor to create neighbors using the services above (no direct manipulation of assignments).

Method
`MakeNeighbor`	Return type: `virtual bool`
`Next`	Return type: `int64_t` Arguments: `int64_t node` Returns the node after node in the current delta.
`number_of_nexts`	Return type: `int` Number of next variables.
`Path`	Return type: `int64_t` Arguments: `int64_t node` Returns the index of the path to which node belongs in the current delta. Only returns a valid value if path variables are taken into account.
`PathOperator`	Arguments: `const std::vector<IntVar>& next_vars, const std::vector<IntVar>& path_vars, IterationParameters iteration_parameters` Builds an instance of PathOperator from next and path variables.
`PathOperator`	Arguments: `const std::vector<IntVar>& next_vars, const std::vector<IntVar>& path_vars, int number_of_base_nodes, bool skip_locally_optimal_paths, bool accept_path_end_base, std::function<int(int64_t)> start_empty_path_class`
`~PathOperator`
`Prev`	Return type: `int64_t` Arguments: `int64_t node` Returns the node before node in the current delta.
`Reset`	Return type: `void`
`SkipUnchanged`	Return type: `bool` Arguments: `int index` TODO(user): Make the following methods protected.