/* PIA - Lenguajes Modernos de Programación
 * FACULTAD DE CIENCIAS FÍSICO MATEMÁTICAS
 * Luis Sebastián Martínez Vega - LCC */

#ifndef SIMPLIFIER_H
#define SIMPLIFIER_H
#include "expressions.hpp"

class Simplifier {
private:
  void simplifyChildren(Expression *root, Expression **left, Expression **right) const;
  Expression *ruleEval(Expression *expr) const;
  Expression *ruleMultiplyByOne(MultiplicationExpression *expr) const;
  Expression *ruleDivideByOne(DivisionExpression *expr) const;
  Expression *ruleMultiplyByZero(MultiplicationExpression *expr) const;
  Expression *ruleZeroDivision(DivisionExpression *expr) const;
  Expression *ruleOnePower(PowerExpression *expr) const;
  Expression *ruleZeroPower(PowerExpression *expr) const;
  Expression *addSubstractZero(Expression *expr) const;
public:
  Expression *visit(Variable *expr) const;
  Expression *visit(Literal *expr) const;
  Expression *visit(Function *expr) const;
  Expression *visit(NegationExpression *expr) const;
  Expression *visit(AddExpression *expr) const;
  Expression *visit(SubExpression *expr) const;
  Expression *visit(MultiplicationExpression *expr) const;
  Expression *visit(DivisionExpression *expr) const;
  Expression *visit(PowerExpression *expr) const;
};

Expression *simplify(Expression *to_simplify);

#endif /* SIMPLIFIER_H */