public static string GetSubstring(RubyScope /*!*/ scope, string /*!*/ self, [NotNull] RubyRegex /*!*/ regex)
{
if (regex.IsEmpty)
{
return(String.Empty);
}
// TODO (opt): don't create a new mutable string:
MatchData match = RegexpOps.Match(scope, regex, MutableString.Create(self, RubyEncoding.UTF8));
if (match == null)
{
return(null);
}
var result = match.GetValue();
return(result != null?result.ToString() : null);
}
private static object MatchToScanResult(RubyScope/*!*/ scope, MutableString/*!*/ self, RubyRegex/*!*/ regex, MatchData/*!*/ match) {
if (match.GroupCount == 1) {
return match.GetValue().TaintBy(regex, scope);
} else {
var result = new RubyArray(match.GroupCount - 1);
for (int i = 1; i < match.GroupCount; i++) {
MutableString value = match.GetGroupValue(i);
result.Add(value != null ? value.TaintBy(regex, scope) : value);
}
return result;
}
}
private static void AppendReplacementExpression(ConversionStorage<MutableString> toS, BinaryOpStorage hashDefault,
MutableString/*!*/ input, MatchData/*!*/ match, MutableString/*!*/ result, Union<IDictionary<object, object>, MutableString>/*!*/ replacement) {
if (replacement.Second != null) {
AppendReplacementExpression(input, match, result, replacement.Second);
} else {
Debug.Assert(toS != null && hashDefault != null);
object replacementObj = HashOps.GetElement(hashDefault, replacement.First, match.GetValue());
if (replacementObj != null) {
var replacementStr = Protocols.ConvertToString(toS, replacementObj);
result.Append(replacementStr).TaintBy(replacementStr);
}
}
}
public static MutableString/*!*/ ToS(MatchData/*!*/ self) {
return self.GetValue();
}
public static MutableString /*!*/ ToS(MatchData /*!*/ self)
{
return(self.GetValue());
}