/// <summary>
/// 获取此上下文无关产生式列表的复制品
/// </summary>
/// <returns></returns>
public object Clone()
{
var result = new ContextfreeProductionList();
result.AddRange(
from item in this
select(item.Clone() as ContextfreeProduction));
return(result);
}
/// <summary>
/// From
/// </summary>
/// <param name="xContextfreeProductionList"></param>
/// <returns></returns>
public static ContextfreeProductionList From(XElement xContextfreeProductionList)
{
if (xContextfreeProductionList == null)
{
return(null);
}
if (xContextfreeProductionList.Name != strContextfreeProductionList)
{
return(null);
}
var result = new ContextfreeProductionList();
result.AddRange(
from item in xContextfreeProductionList.Elements(ContextfreeProduction.strContextfreeProduction)
select ContextfreeProduction.From(item)
);
return(result);
}
/// <summary>
/// 从<code>XElement</code>中读取一个<code>ContextfreeGrammar</code>对象
/// </summary>
/// <param name="xContextfreeGrammar"></param>
/// <returns></returns>
public static ContextfreeGrammar From(XElement xContextfreeGrammar)
{
if (xContextfreeGrammar == null)
{
return(null);
}
if (xContextfreeGrammar.Name != strContextfreeGrammar)
{
return(null);
}
var result = new ContextfreeGrammar();
result.GrammarName = xContextfreeGrammar.Attribute(strGrammarName).Value;
result.Namespace = xContextfreeGrammar.Attribute(strNamespace).Value;
result.ProductionCollection = ContextfreeProductionList.From(
xContextfreeGrammar.Element(ContextfreeProductionList.strContextfreeProductionList));
return(result);
}
/// <summary>
/// 2 <PList> ::= <Vn> "::=" <VList> ";" <PList>;
/// <para>3 <PList> ::= null;</para>
/// </summary>
/// <param name="plist"></param>
/// <param name="syntaxTree"></param>
private static void GetGrammarPList(
ContextfreeProductionList plist, SyntaxTree <EnumTokenTypeCG, EnumVTypeCG, TreeNodeValueCG> syntaxTree)
{//<PList> ::= <Vn> "::=" <VList> ";" <PList> | null; 2 3
if (syntaxTree.CandidateFunc == LL1SyntaxParserCG.GetFuncParsecase_PList___tail_lessThan_Leave())
{
ContextfreeProduction production = new ContextfreeProduction();
plist.Add(production);
var vn = GetGrammarVn(syntaxTree.Children[0]);
production.Left = vn;
var vlist = GetGrammarVList(syntaxTree.Children[2]);
production.RightCollection = vlist;
GetGrammarPList(plist, syntaxTree.Children[4]);
}
else if (syntaxTree.CandidateFunc == LL1SyntaxParserCG.GetFuncParsecase_PList___tail_startEndLeave())
{
// nothing to do
//GetGrammarnull(syntaxTree.Children[0]);
}
}