public abstract void Visit(BinaryExpression expression);
private Expression ParseMultiplicativeBinary()
{
Expression expr = ParseRelationalBinary();
while (!_scanner.IsEof() && (_current.Type == TokenType.Multiply ||
_current.Type == TokenType.Divide || _current.Type == TokenType.Modulo))
{
var binaryMulDiv = new BinaryExpression
{
Operator = ((PunctuatorToken)_current).ToOperatorType(),
Left = expr
};
Expect(MiddleGroupMultiplicative);
binaryMulDiv.Right = ParseRelationalBinary();
expr = binaryMulDiv;
}
return expr;
}
private Expression ParseRelationalBinary()
{
Expression expr = ParseIdentifier();
while (!_scanner.IsEof() && (_current.Type == TokenType.Equality || _current.Type == TokenType.Inequality ||
_current.Type == TokenType.LessThan || _current.Type == TokenType.GreaterThan ||
_current.Type == TokenType.LessThanOrEqual || _current.Type == TokenType.GreaterThanOrEqual))
{
var binaryExp = new BinaryExpression
{
Operator = ((PunctuatorToken) _current).ToOperatorType(),
Left = expr
};
Expect(MiddleGroupAdditiveRelational);
binaryExp.Right = ParseIdentifier();
expr = binaryExp;
}
return expr;
}
private Expression ParseAdditiveBinary()
{
Expression expr = ParseMultiplicativeBinary();
while (!_scanner.IsEof() && (_current.Type == TokenType.Plus || _current.Type == TokenType.Minus))
{
var binaryAddSub = new BinaryExpression
{
Operator = ((PunctuatorToken)_current).ToOperatorType(),
Left = expr
};
Expect(MiddleGroupAdditiveRelational);
binaryAddSub.Right = ParseMultiplicativeBinary();
expr = binaryAddSub;
}
return expr;
}