public CharacterClassExpression GetComplement()
{
var complementCharacters = _alphabet.GetAllCharacters().Where(x => !_literals.ContainsKey(x)).ToList();
var complement = new CharacterClassExpression(_alphabet, _random, _maxInverseLength);
complement.AddCharacters(complementCharacters);
return(complement);
}
private IParseResult <ExpressionMetaData> TryGetAnyCharacterExpression(ITokenStream tokenStream, out IExpression expression)
{
tokenStream.Pop();
var characterExpression = new CharacterClassExpression(_alphabet, _random, _maxCharClassInverseLength);
characterExpression.AddCharacters(_alphabet.GetAllCharacters());
expression = characterExpression;
return(new SuccessParseResult <ExpressionMetaData>(tokenStream.CurrentPosition, new ExpressionMetaData()));
}
public override IExpression Clone()
{
var clone = new CharacterClassExpression(_alphabet, _random, _maxInverseLength)
{
RepeatRange = RepeatRange?.Clone(),
ExpansionLength = ExpansionLength
};
clone.AddCharacters(_characterList);
return(clone);
}
private static void ClassifyListsByLength(CharacterClassExpression charClass1, CharacterClassExpression charClass2, out IDictionary <string, string> shortDict, out IDictionary <string, string> longDict)
{
if (charClass1._literals.Count < charClass2._literals.Count)
{
shortDict = charClass1._literals;
longDict = charClass2._literals;
}
else
{
shortDict = charClass2._literals;
longDict = charClass1._literals;
}
}
private IParseResult <ExpressionMetaData> TryGetSingleCharacterExpression(ITokenStream tokenStream, out IExpression expression)
{
expression = null;
var tokenValue = tokenStream.Pop().GetValue <string>();
var characterClassExpression = new CharacterClassExpression(_alphabet, _random, _maxCharClassInverseLength);
characterClassExpression.AddCharacters(new List <string> {
tokenValue
});
expression = characterClassExpression;
return(new SuccessParseResult <ExpressionMetaData>(tokenStream.CurrentPosition, new ExpressionMetaData()));
}
public CharacterClassExpression GetUnion(CharacterClassExpression charClass)
{
var union = new CharacterClassExpression(_alphabet, _random, _maxInverseLength)
{
RepeatRange = RepeatRange
};
union.AddCharacters(_characterList);
if (charClass != null)
{
union.AddCharacters(charClass._characterList);
}
return(union);
}
private IParseResult <ExpressionMetaData> TryGetCharacterClassExpression(ITokenStream tokenStream, out IExpression expression)
{
expression = null;
var nextTokenType = tokenStream.Pop().GetType <RegexTokenType>();
var getComplement = nextTokenType == RegexTokenType.OpenNegateCharacterClass;
nextTokenType = tokenStream.LookAhead(0).GetType <RegexTokenType>();
var characters = new List <string>();
while (nextTokenType == RegexTokenType.Character || nextTokenType == RegexTokenType.CharacterRange)
{
var nextToken = tokenStream.Pop();
if (nextToken.GetType <RegexTokenType>() == RegexTokenType.Character)
{
characters.Add(nextToken.GetValue <string>());
}
else
{
characters.AddRange(nextToken.GetValue <CharacterRange>().Characters);
}
nextTokenType = tokenStream.LookAhead(0).GetType <RegexTokenType>();
}
if (nextTokenType != RegexTokenType.CloseCharacterClass)
{
return(new FailureParseResult <ExpressionMetaData>(tokenStream.CurrentPosition, RegSeedErrorType.CloseCharacterClassExpected));
}
tokenStream.Pop();
var characterClassExpression = new CharacterClassExpression(_alphabet, _random, _maxCharClassInverseLength);
characterClassExpression.AddCharacters(characters);
expression = getComplement ? characterClassExpression.GetComplement() : characterClassExpression;
return(new SuccessParseResult <ExpressionMetaData>(tokenStream.CurrentPosition, new ExpressionMetaData()));
}
private UnionExpression GetAllCharacterClassInversesUpToMaxInverseLength()
{
var minimalLengthTwoRange = new IntegerInterval();
minimalLengthTwoRange.TrySetValue(2, _maxInverseLength);
var atLeastLengthTwoWords = new CharacterClassExpression(_alphabet, _random, _maxInverseLength)
{
RepeatRange = minimalLengthTwoRange
};
atLeastLengthTwoWords.AddCharacters(_alphabet.GetAllCharacters());
var inverseExpressions = new List <IExpression>
{
GetComplement(),
atLeastLengthTwoWords
};
return(new UnionExpression(inverseExpressions, _random));
}
public CharacterClassExpression GetIntersection(CharacterClassExpression charClass)
{
if (charClass == null || !charClass._characterList.Any() || !_characterList.Any())
{
return(new CharacterClassExpression(_alphabet, _random, _maxInverseLength));
}
ClassifyListsByLength(this, charClass, out var shortDict, out var longDict);
var intersectList = shortDict.Where(x => longDict.ContainsKey(x.Key))
.Select(y => y.Key)
.ToList();
var intersection = new CharacterClassExpression(_alphabet, _random, _maxInverseLength)
{
RepeatRange = RepeatRange
};
intersection.AddCharacters(intersectList);
return(intersection);
}