private Expression equility()
{
Expression expression = comparison();
while (match(TokenType.BANG_EQUAL, TokenType.EQUAL_EQUAL))
{
Token op = previous();
Expression right = comparison();
expression = new Expression.Binary(expression, op, right);
}
return(expression);
}
private Expression factor()
{
Expression expression = unary();
while (match(TokenType.SLASH, TokenType.STAR))
{
Token op = previous();
Expression right = unary();
expression = new Expression.Binary(expression, op, right);
}
return(expression);
}
private Expression term()
{
Expression expression = factor();
while (match(TokenType.MINUS, TokenType.PLUS))
{
Token op = previous();
Expression right = factor();
expression = new Expression.Binary(expression, op, right);
}
return(expression);
}
private Expression comparison()
{
Expression expression = term();
while (match(TokenType.GREATER, TokenType.GREATER_EQUAL, TokenType.LESS, TokenType.LESS_EQUAL))
{
Token op = previous();
Expression right = term();
expression = new Expression.Binary(expression, op, right);
}
return(expression);
}
public string visitBinaryExpression(Expression.Binary expression)
{
return(parenthesize(expression.op.lexeme, expression.left, expression.right));
}
