public void parse(String input, String expected)
{
List <IndexRange> ranges = IndexRange.parse(input);
String actual = String.Join("|", ranges);
Assert.Equal(expected, actual);
}
private void compileFlags(String flags)
{
if (String.IsNullOrEmpty(flags))
{
replaceIndex = 1;
return;
}
Match match = FLAG_PATTERN.Match(flags);
if (!match.Success)
{
throw new InvalidArgumentException("Invalid flags: {0}", flags);
}
String textFlags = match.Groups[1].Value;
String textRanges = match.Groups[2].Value;
ignoreCase = textFlags.Contains("i");
global = textFlags.Contains("g");
List <IndexRange> ranges = IndexRange.parse(textRanges);
if (ranges.Count == 1 && ranges[0].isSingleIndex())
{
replaceIndex = ranges[0].low;
if (replaceIndex <= 0)
{
throw new InvalidArgumentException("Invalid index: {0}. Must be greater than zero", replaceIndex);
}
}
else if (ranges.Count > 0)
{
if (global)
{
throw new InvalidArgumentException("Global flag cannot be used with a range of replacement indexes");
}
replaceRanges = ranges;
foreach (IndexRange toCheck in replaceRanges)
{
if (toCheck.high < toCheck.low)
{
throw new InvalidArgumentException("Invalid range: {0}. End index must be greater than start index", toCheck);
}
if (toCheck.low <= 0)
{
throw new InvalidArgumentException("Invalid index: {0}. Must be greater than zero", toCheck.low);
}
}
}
if (replaceIndex == null && replaceRanges == null && !global)
{
replaceIndex = 1; // defaults to replace first match, if nothing is explicitly specified
}
}
