private void Range(ExpressionType expType, RangeNode range, ValueValidator validator)
{
validator(expType, range.Start);
if (range.End != null)
{
validator(expType, range.End);
if (range.IsHalfOpen && ValuesAreEqual(expType, range.Start, range.End))
throw new SchyntaxParseException("Start and end values of a half-open range cannot be equal.", Input, range.Start.Index);
}
if (expType == ExpressionType.Dates && range.End != null)
{
// special validation to make the date range is sane
var start = (DateValueNode)range.Start;
var end = (DateValueNode)range.End;
if (start.Year != null || end.Year != null)
{
if (start.Year == null || end.Year == null)
throw new SchyntaxParseException("Cannot mix full and partial dates in a date range.", Input, start.Index);
if (!IsStartBeforeEnd(start, end))
throw new SchyntaxParseException("End date of range is before the start date.", Input, start.Index);
}
}
}
private RangeNode ParseRange(ExpressionType expressionType)
{
var range = new RangeNode();
range.Start = expressionType == ExpressionType.Dates ? (ValueNode)ParseDate() : ParseIntegerValue(expressionType);
var isRange = false;
if (IsNext(TokenType.RangeInclusive))
{
isRange = true;
}
else if (IsNext(TokenType.RangeHalfOpen))
{
isRange = true;
range.IsHalfOpen = true;
}
if (isRange)
{
range.AddToken(Advance());
range.End = expressionType == ExpressionType.Dates ? (ValueNode)ParseDate() : ParseIntegerValue(expressionType);
}
return range;
}