public ReadResults Read(Converter <string> function, Func <string, CommandError> invalidNumberErrorProvider, T minimum, T maximum, bool loopable, out Range <T> result)
{
result = default;
if (!StringReader.CanRead())
{
return(ReadResults.Failure(CommandError.ExpectedValueOrRange().WithContext(StringReader)));
}
int start = StringReader.GetCursor();
T? right;
ReadResults readResults = ReadNumber(function, invalidNumberErrorProvider, out T? left);
if (!readResults.Successful)
{
return(readResults);
}
if (StringReader.CanRead(2) && StringReader.Peek() == '.' && StringReader.Peek(1) == '.')
{
StringReader.Skip(2);
readResults = ReadNumber(function, invalidNumberErrorProvider, out right);
if (!readResults.Successful)
{
return(readResults);
}
}
else
{
right = left;
}
if (left == null && right == null)
{
return(ReadResults.Failure(CommandError.ExpectedValueOrRange().WithContext(StringReader)));
}
if (left == null)
{
left = minimum;
}
if (right == null)
{
right = maximum;
}
if (!loopable && ((T)left).CompareTo((T)right) > 0)
{
StringReader.SetCursor(start);
return(ReadResults.Failure(CommandError.RangeMinBiggerThanMax().WithContext(StringReader)));
}
result = new Range <T>((T)left, (T)right);
return(ReadResults.Success());
}