/* -*- coding: utf-8 -*-
 *
 * Copyright 2022 IBM RESEARCH. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * =============================================================================
 */

#ifndef __QASM_AST_OPENQASM_VERSION_TRACKER_H
#define __QASM_AST_OPENQASM_VERSION_TRACKER_H

#include <string>

namespace QASM {

class ASTOpenQASMVersionTracker {
private:
  double Version;
  double DefaultVersion;

private:
  static ASTOpenQASMVersionTracker OQT;

private:
  ASTOpenQASMVersionTracker() : Version(0.0), DefaultVersion(3.0) {}

public:
  ~ASTOpenQASMVersionTracker() = default;

  static ASTOpenQASMVersionTracker &Instance() { return OQT; }

  bool ParseOpenQASMLine(std::string &L, std::string &OQ, std::string &OV,
                         bool &SOQ, bool OQR = false);

  double GetVersion() const { return Version; }

  double GetDefaultVersion() const { return DefaultVersion; }

  void SetVersion(double D = 3.0) { Version = D; }
};

} // namespace QASM

#endif // __QASM_AST_OPENQASM_VERSION_TRACKER_H
