#include "probfd/cost_function.h"

Description

template<typename, typename>
class probfd::CostFunction< typename, typename >

The interface specifying action and state termination costs, aswell as the goal states of a state space.

This interface communicates the action and termination costs and the goal states of a state space to the MDP algorithms. Users must implement the public methods get_termination_info(const State& state) and get_action_cost(const Action& action).

Example

class MaxProbCostFunction : public CostFunction<State, OperatorID>
{
protected:
    TerminationInfo get_termination_info(const State& state) override
    {
        const bool is_goal = ...;
 
        // Terminate with -1 in goal states, 0 otherwise.
        return TerminationInfo(is_goal, is_goal ? -1.0_vt : 0.0_vt);
    }
 
    value_t get_action_cost(OperatorID) override
    {
        // Actions have no cost.
        return 0;
    }
};

Template Parameters

State	- The state type of the underlying MDP model.
Action	- The action type of the underlying MDP model.

Public Member Functions
virtual TerminationInfo	get_termination_info (param_type< State > state)=0
	Returns the cost to terminate in a given state and checks whether a state is a goal.

virtual value_t	get_action_cost (param_type< Action > action)=0
	Gets the cost of an action.