Class: ORTools::CpSolver

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Defined in:
lib/or_tools/cp_solver.rb

Instance Method Summary collapse

Instance Method Details

#parameters ⇒ Object 



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# File 'lib/or_tools/cp_solver.rb', line 48

def parameters
  @parameters ||= SatParameters.new
end

#search_for_all_solutions(model, observer) ⇒ Object 



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# File 'lib/or_tools/cp_solver.rb', line 33

def search_for_all_solutions(model, observer)
  warn "[or-tools] search_for_all_solutions is deprecated; use solve() with solver.parameters.enumerate_all_solutions = true"
  previous_value = parameters.enumerate_all_solutions
  begin
    parameters.enumerate_all_solutions = true
    solve(model, observer)
  ensure
    parameters.enumerate_all_solutions = previous_value
  end
end

#solve(model, observer = nil) ⇒ Object 



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# File 'lib/or_tools/cp_solver.rb', line 9

def solve(model, observer = nil)
  @response = _solve(model, parameters, observer)
  @response.status
end

#solve_with_solution_callback(model, observer) ⇒ Object 



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# File 'lib/or_tools/cp_solver.rb', line 28

def solve_with_solution_callback(model, observer)
  warn "[or-tools] solve_with_solution_callback is deprecated; use solve(model, callback)"
  solve(model, observer)
end

#sufficient_assumptions_for_infeasibility ⇒ Object 



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# File 'lib/or_tools/cp_solver.rb', line 44

def sufficient_assumptions_for_infeasibility
  @response.sufficient_assumptions_for_infeasibility
end

#value(var) ⇒ Object 



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# File 'lib/or_tools/cp_solver.rb', line 14

def value(var)
  # could also check solution_size == 0
  unless [:feasible, :optimal].include?(@response.status)
    # could return nil, but raise error like Python library
    raise Error, "No solution found"
  end

  if var.is_a?(BoolVar)
    _solution_boolean_value(@response, var)
  else
    _solution_integer_value(@response, var)
  end
end