protected Expression ParseCommon(Expression result)
{
while (!(AtEnd || Current == SyntaxToken.ParenClose || Current == SyntaxToken.Comma || GetOrderByDirection(Current).HasValue))
{
var @operator = GetOperator(Current);
if ([email protected])
{
throw new ODataException(ErrorMessages.Parser_ExpectedOperator);
}
else if (!OperatorUtil.IsBinary(@operator.Value))
{
throw new ODataException(ErrorMessages.Parser_ExpectedBinaryOperator);
}
MoveNext();
ExpectAny();
var right = ParseCommonItem();
// Apply operator precedence
var binary = result as BinaryExpression;
if (binary != null && binary.Operator < @operator.Value)
{
result = CreateBinary(
@operator.Value,
result,
ParseCommon(right)
);
}
else if (binary != null)
{
result = Rebalance(
binary,
@operator.Value,
ParseCommon(right)
);
}
else
{
result = CreateBinary(
@operator.Value,
result,
right
);
}
}
return(result);
}
private Expression CreateBinary(Operator @operator, Expression left, Expression right)
{
if (OperatorUtil.IsLogical(@operator))
{
return(new LogicalExpression(@operator, left, right));
}
else if (OperatorUtil.IsCompare(@operator))
{
return(new ComparisonExpression(@operator, left, right));
}
else if (OperatorUtil.IsArithmetic(@operator))
{
return(new ArithmeticExpression(@operator, left, right));
}
else
{
throw new NotSupportedException();
}
}