private static RightPartList GetRightPartList(SyntaxTree syntaxTree)
{
RightPartList result = null;
// <RightPartList> ::= "|" <Canditate> <RightPartList> | null ;
if (syntaxTree.NodeType.Type == ContextfreeGrammarTreeNodeType.__RightPartList)
{
if (syntaxTree.Children.Count == 3)
{
// <RightPartList> ::= "|" <Canditate> <RightPartList> ;
Candidate candidate = GetCandidate(syntaxTree.Children[1]);
result = new RightPartList();
result.Add(candidate);
RightPartList list = GetRightPartList(syntaxTree.Children[2]);
result.AddRange(list);
}
else if (syntaxTree.Children.Count == 0)
{
// <RightPartList> ::= null ;
result = new RightPartList();
}
}
return(result);
}
private static List <Regulation> GetProduction(SyntaxTree syntaxTree)
{
// <Production> ::= <Vn> "::=" <Canditate> <RightPartList> ;
List <Regulation> result = new List <Regulation>();
if (syntaxTree.NodeType.Type == ContextfreeGrammarTreeNodeType.__Production)
{
Vn left = GetVn(syntaxTree.Children[0]);
TreeNodeType leftNode = left.GetTreeNodeType();
{
Candidate candidate = GetCandidate(syntaxTree.Children[2]);
var regulation = new Regulation(leftNode,
(from item in candidate
select item.GetTreeNodeType()).ToArray());
result.Add(regulation);
}
RightPartList rightPartList = GetRightPartList(syntaxTree.Children[3]);
foreach (var candidate in rightPartList)
{
var regulation = new Regulation(leftNode,
(from item in candidate
select item.GetTreeNodeType()).ToArray());
result.Add(regulation);
}
}
return(result);
}
