private EbnfLexerRuleExpression VisitLexerRuleExpressionNode(IInternalTreeNode node)
{
EbnfLexerRuleTerm term = null;
EbnfLexerRuleExpression expression = null;
for (int c = 0; c < node.Children.Count; c++)
{
var child = node.Children[c];
if (child.NodeType != TreeNodeType.Internal)
{
continue;
}
var internalNode = child as IInternalTreeNode;
var symbolValue = internalNode.Symbol.Value;
if (EbnfGrammar.LexerRuleTerm == symbolValue)
{
term = VisitLexerRuleTermNode(internalNode);
}
if (EbnfGrammar.LexerRuleExpression == symbolValue)
{
expression = VisitLexerRuleExpressionNode(internalNode);
}
}
if (expression == null)
{
return(new EbnfLexerRuleExpression(term));
}
return(new EbnfLexerRuleExpressionAlteration(term, expression));
}
private EbnfLexerRuleTerm VisitLexerRuleTermNode(IInternalTreeNode node)
{
EbnfLexerRuleFactor factor = null;
EbnfLexerRuleTerm term = null;
for (int c = 0; c < node.Children.Count; c++)
{
var child = node.Children[c];
if (child.NodeType != TreeNodeType.Internal)
{
continue;
}
var internalNode = child as IInternalTreeNode;
var symbolValue = internalNode.Symbol.Value;
if (EbnfGrammar.LexerRuleFactor == symbolValue)
{
factor = VisitLexerRuleFactorNode(internalNode);
}
if (EbnfGrammar.LexerRuleTerm == symbolValue)
{
term = VisitLexerRuleTermNode(internalNode);
}
}
if (term == null)
{
return(new EbnfLexerRuleTerm(factor));
}
return(new EbnfLexerRuleTermConcatenation(factor, term));
}
INfa LexerRuleTerm(EbnfLexerRuleTerm term)
{
var nfa = LexerRuleFactor(term.Factor);
if (term.NodeType == EbnfNodeType.EbnfLexerRuleTermConcatenation)
{
var concatenation = term as EbnfLexerRuleTermConcatenation;
var concatNfa = LexerRuleTerm(concatenation.Term);
nfa = nfa.Concatenation(concatNfa);
}
return(nfa);
}
public EbnfLexerRuleTermConcatenation(EbnfLexerRuleFactor factor, EbnfLexerRuleTerm term)
: base(factor)
{
Term = term;
_hashCode = ComputeHashCode();
}
public EbnfLexerRuleExpressionAlteration(EbnfLexerRuleTerm term, EbnfLexerRuleExpression expression)
: base(term)
{
Expression = expression;
_hashCode = ComputeHashCode();
}
public EbnfLexerRuleExpression(EbnfLexerRuleTerm term)
{
Term = term;
_hashCode = ComputeHashCode();
}
public EbnfLexerRuleExpressionAlteration(EbnfLexerRuleTerm term, EbnfLexerRuleExpression expression)
: base(term)
{
Expression = expression;
_hashCode = ComputeHashCode();
}
public EbnfLexerRuleExpression(EbnfLexerRuleTerm term)
{
Term = term;
_hashCode = ComputeHashCode();
}
public EbnfLexerRuleTermConcatenation(EbnfLexerRuleFactor factor, EbnfLexerRuleTerm term)
: base(factor)
{
Term = term;
_hashCode = ComputeHashCode();
}