abstract_context.hh

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// This file is part of Awali.
// Copyright 2016-2022 Sylvain Lombardy, Victor Marsault, Jacques Sakarovitch
//
// Awali is a 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.
//
// This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
 
#ifndef DYN_ABSTRACT_CONTEXT_HH
#define DYN_ABSTRACT_CONTEXT_HH
 
#include<memory>
#include<string>
#include<vector>
#include<list>
 
#include <awali/dyn/core/any.hh>
#include <awali/dyn/core/typedefs.hh>
#include <awali/dyn/core/context_description/description_types.hh>
 
namespace awali { namespace dyn {
 
  class ratexp_t;
  class automaton_t;
 
  struct abstract_context_t {
 
    virtual std::string sname() const =0;
 
    virtual std::string vname(bool full = true) const =0;
 
    virtual std::string labelset_name() const =0;
 
    virtual std::string weightset_name(std::string format="text") const =0;
 
    virtual std::vector<any_t> alphabet() const = 0;
 
    /* Returns the object representing epsilon.
     *
     * @beware Although printing the returned value of this function would give
     * `\e`, it is not an std::string internally.
     */
    virtual label_t epsilon() const = 0;
 
    virtual bool is_eps_allowed() const = 0;
 
    virtual context::context_description description() const = 0;
 
    virtual void add_letter(label_t let) = 0;
 
    virtual bool has_letter(label_t let) const = 0;
 
    virtual bool show_one() const = 0;
 
    virtual weight_t weight_one() const = 0;
 
    virtual weight_t weight_zero() const = 0;
 
    virtual bool is_finite_weightset() const =0;
 
    virtual bool is_locally_finite_weightset() const =0;
 
    virtual weight_t add_weights(weight_t l, weight_t r) const = 0;
 
    virtual weight_t mul_weights(weight_t l, weight_t r) const = 0;
 
    virtual weight_t div_weights(weight_t l, weight_t r) const = 0;
 
    virtual weight_t get_word(std::string str) const =0;
 
    virtual weight_t get_weight(std::string str) const =0;
 
    virtual label_t get_label(std::string str) const =0;
 
    virtual label_t get_label(std::string str, size_t i) const =0;
 
    virtual std::string weight_to_string(weight_t w) const=0;
 
    virtual std::string label_to_string(label_t w) const=0;
 
 
    virtual std::list<any_t> expand_label(label_t lab) const=0;
 
 
    ratexp_t make_ratexp(std::string str, bool fixed_alphabet = true);
 
    automaton_t make_automaton();
 
 
    virtual ~abstract_context_t() {}
 
 
    bool operator!=(abstract_context_t const& other) {
      return !(*this == other);
    }
    bool operator==(abstract_context_t const& other) {
      return (vname(true) == other.vname(true));
    }
 
  protected:
    virtual abstract_context_t* copy() = 0;
  };
 
 
}}//end of ns awali::dyn
#endif