private static INfa Character(RegexCharacter character)
{
var start = new NfaState();
var end = new NfaState();
var terminal = new CharacterTerminal(character.Value);
var transition = new TerminalNfaTransition(
terminal: terminal,
target: end);
start.AddTransistion(transition);
return(new Nfa(start, end));
}
private static INfa Character(RegexCharacterClassCharacter character, bool negate)
{
var start = new NfaState();
var end = new NfaState();
var terminal = CreateTerminalForCharacter(character.Value, character.IsEscaped, negate);
var transition = new TerminalNfaTransition(
terminal: terminal,
target: end);
start.AddTransistion(transition);
return(new Nfa(start, end));
}
private static INfa Character(RegexCharacterClassCharacter character, bool negate)
{
var start = new NfaState();
var end = new NfaState();
ITerminal terminal = null;
if (!character.IsEscaped)
{
terminal = new CharacterTerminal(character.Value);
}
else
{
switch (character.Value)
{
case 's':
terminal = new WhitespaceTerminal();
break;
case 'd':
terminal = new DigitTerminal();
break;
case 'w':
terminal = new WordTerminal();
break;
case 'D':
terminal = new DigitTerminal();
negate = !negate;
break;
case 'S':
terminal = new WhitespaceTerminal();
negate = !negate;
break;
case 'W':
terminal = new WordTerminal();
negate = !negate;
break;
default:
terminal = new CharacterTerminal(character.Value);
break;
}
}
if (negate)
{
terminal = new NegationTerminal(terminal);
}
var transition = new TerminalNfaTransition(
terminal: terminal,
target: end);
start.AddTransistion(transition);
return(new Nfa(start, end));
}
