public PatternOffset(OffsetType type, Whence whence, int offset)
{
if (OffsetType.MatchStart == type && Whence.Start == whence && offset < 0) {
string msg = StringExtensions.Fi("Iris currently does not support negative a negative match start offset starting from the actual match start");
throw new AssertionViolationException(msg);
}
this.OffSetType = type;
this.Whence = whence;
this.Offset = offset;
}
public PatternOffset(OffsetType type, Whence whence, int offset)
{
if (OffsetType.MatchStart == type && Whence.Start == whence && offset < 0)
{
string msg = StringExtensions.Fi("Iris currently does not support negative a negative match start offset starting from the actual match start");
throw new AssertionViolationException(msg);
}
this.OffSetType = type;
this.Whence = whence;
this.Offset = offset;
}
private static void AddOffset(Pattern p, string offsetstring)
{
Match m = m_offsetRegex.Match(offsetstring);
if (!m.Success)
{
throw new ArgumentException(StringExtensions.Fi("Invalid offset string '{0}'", offsetstring));
}
string what = m.Groups["what"].Value;
string whenceChar = m.Groups["whence"].Value;
int displacement;
if (m.Groups["displacement"].Success)
{
displacement = int.Parse(m.Groups["displacement"].Value, CultureInfo.InvariantCulture);
}
else
{
displacement = 0;
}
if ("lc" == what)
{
if (0 == displacement)
{
throw new ArgumentException(StringExtensions.Fi("Invalid offset: '{0}' applies to leading context, but does not specify a number", offsetstring));
}
p.LeadingContext = displacement;
return;
}
Whence whence = (whenceChar == "s") ? Whence.Start : Whence.End;
OffsetType type;
switch (what)
{
case "ms":
type = OffsetType.MatchStart;
break;
case "me":
type = OffsetType.MatchEnd;
break;
case "hs":
type = OffsetType.HighlightStart;
break;
case "he":
type = OffsetType.HighlightEnd;
break;
case "rs":
type = OffsetType.RegionStart;
break;
case "re":
type = OffsetType.RegionEnd;
break;
default:
throw new AssertionViolationException(StringExtensions.Fi("Unknown offset type: '{0}'", what));
}
p.Offsets.Add(new PatternOffset(type, whence, displacement));
}
