private Nfa LexerRuleFactor(IEbnfLexerRuleFactor factor)
{
switch (factor)
{
case EbnfLexerRuleFactorLiteral literal:
return(LexerRuleFactorLiteral(literal));
case EbnfLexerRuleFactorRegex regex:
return(LexerRuleFactorRegex(regex));
default:
throw new InvalidOperationException(
$"Invalid IEbnfLexerRuleFactor node type detected. Found {factor.GetType().Name}, expected EbnfLexerRuleFactorLiteral or EbnfLexerRuleFactorRegex");
}
}
private IEbnfLexerRuleTerm VisitLexerRuleTermNode(IInternalTreeNode node)
{
IEbnfLexerRuleFactor factor = null;
IEbnfLexerRuleTerm term = null;
foreach (var internalNode in node.Children.OfType <IInternalTreeNode>())
{
if (internalNode.Is(EbnfGrammar.LexerRuleFactor))
{
factor = VisitLexerRuleFactorNode(internalNode);
}
else if (internalNode.Is(EbnfGrammar.LexerRuleTerm))
{
term = VisitLexerRuleTermNode(internalNode);
}
}
if (term == null)
{
return(new EbnfLexerRuleTermSimple(factor));
}
return(new EbnfLexerRuleTermConcatenation(factor, term));
}
public EbnfLexerRuleTermConcatenation(IEbnfLexerRuleFactor factor, IEbnfLexerRuleTerm term)
{
Factor = factor;
Term = term;
}
public EbnfLexerRuleTermSimple(IEbnfLexerRuleFactor factor)
{
Factor = factor;
}
