source: branches/HeuristicLab.Problems.GPDL/HeuristicLab.Grammars/3.3/Interfaces/IGrammar.cs @ 12547

#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2013 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * HeuristicLab is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

using System.Collections.Generic;

namespace HeuristicLab.Grammars {

  public interface IGrammar {
    ISymbol StartSymbol { get; set; }
    IEnumerable<ISymbol> TerminalSymbols { get; }
    IEnumerable<ISymbol> NonTerminalSymbols { get; }
    IEnumerable<ISymbol> Symbols { get; }
    bool IsTerminal(ISymbol symbol);
    bool IsNonTerminal(ISymbol symbol);

    int NumberOfAlternatives(ISymbol ntSymbol);
    IEnumerable<Sequence> GetAlternatives(ISymbol ntSymbol);
    Sequence GetAlternative(ISymbol ntSymbol, int index);

    void AddProductionRule(ISymbol ntSymbol, Sequence production);
  }
}