/// <summary>
/// 添加元素到此FIRST集
/// <para>若不包含此元素，则添加，并返回true</para>
/// <para>若元素为null或已包含此元素或元素不是叶结点，则不会添加，并返回false</para>
/// </summary>
/// <param name="item"></param>
/// <returns>若添加，返回true；若没有添加，返回false</returns>
public bool Add(ProductionNode item)
{
if (item == null ||
this.m_Value.Contains(item)
//|| (item.Position != EnumProductionNodePosition.Leave && item.Position != EnumProductionNodePosition.My)
)
{
return(false);
}
this.m_Value.Add(item);
return(true);
}
/// <summary>
/// 添加元素到此FOLLOW集
/// <para>若不包含此元素，则添加，并返回true</para>
/// <para>若元素为null或已包含此元素或元素不是叶结点或元素为ε（空结点），则不会添加，并返回false</para>
/// </summary>
/// <param name="item"></param>
/// <returns>若添加，返回true；若没有添加，返回false</returns>
public bool Add(ProductionNode item)
{
if (item == null ||
this.m_Value.Contains(item) ||
item.Position != EnumProductionNodePosition.Leave ||
item == ProductionNode.tail_null
)
{
return(false);
}
this.m_Value.Add(item);
return(true);
}
private bool IsCGKeyword(ProductionNode item)
{
if (item == ProductionNode.tail_null ||
item == ProductionNode.tail_identifier ||
item == ProductionNode.tail_number ||
item == ProductionNode.tail_constString)
{
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// From
/// </summary>
/// <param name="xDerivation"></param>
/// <returns></returns>
public static Derivation From(XElement xDerivation)
{
if (xDerivation == null)
{
return(null);
}
if (xDerivation.Name != strDerivation)
{
return(null);
}
var result = new Derivation();
result.Left = ProductionNode.From(xDerivation.Element(strLeft));
result.Right = ProductionNodeList.From(xDerivation.Element(strRight));
return(result);
}
/// <summary>
/// From
/// </summary>
/// <param name="xContextfreeProduction"></param>
/// <returns></returns>
public static ContextfreeProduction From(XElement xContextfreeProduction)
{
if (xContextfreeProduction == null)
{
return(null);
}
if (xContextfreeProduction.Name != strContextfreeProduction)
{
return(null);
}
var result = new ContextfreeProduction();
result.Left = ProductionNode.From(xContextfreeProduction.Element(ProductionNode.strProductionNode));
result.RightCollection = RightSection.From(xContextfreeProduction.Element(RightSection.strRightSection));
return(result);
}
///// <summary>
///// 设置给定行、列位置的推导式
///// </summary>
///// <param name="line"></param>
///// <param name="column"></param>
///// <param name="derivation"></param>
//public void SetCell(int line, int column, Derivation derivation)
//{
// if (0 <= line && line < this.m_LineCount
// && 0 <= column && column < this.m_ColumnCount)
// {
// //this.m_ParserMap[line, column].Add(derivation);
// string key = string.Format("{0}-{1}",)
// }
//}
/// <summary>
/// 设置给定语法类型、单词类型所对应的推导式
/// </summary>
/// <param name="leftNode"></param>
/// <param name="nextLeave"></param>
/// <param name="function"></param>
public void SetCell(ProductionNode leftNode, ProductionNode nextLeave, Derivation function)
{
//SetCell(this.m_LeftNodes[leftNode], this.m_NextLeaves[nextLeave], function);
string key = string.Format("Left:{0} Terminal:{1}", leftNode, nextLeave);
DerivationList list = null;
if (this.m_ParserMap.TryGetValue(key, out list))
{
list.Add(function);
}
else
{
list = new DerivationList();
list.Add(function);
this.m_ParserMap.Add(key, list);
}
}
/// <summary>
/// 获取<code>EnumVType</code>的一项的名称
/// <para>constStringLeave</para>
/// <para>VList</para>
/// </summary>
/// <param name="node">此项对应的结点</param>
/// <returns></returns>
public string GetEnumVTypeSGItem(ProductionNode node)
{
var result = string.Format("{0}", ConvertToIdentifier(node));
if (node.Position == EnumProductionNodePosition.Leave)
{
if ('A' <= result[0] && result[0] <= 'Z')
result = ((char)('a' - 'A' + result[0])) + result.Substring(1);
if (!result.EndsWith("Leave"))
result += "Leave";
result = (IsCGKeyword(node) ? "" : GetKeywordPrefix4SyntaxTreeNodeLeave(node.Position)) + result;
}
else if (node.Position == EnumProductionNodePosition.NonLeave)
{
if (result.EndsWith("Leave"))
result = result.Substring(0, result.Length - 5);
result = (IsCGKeyword(node) ? "" : GetKeywordPrefix4SyntaxTreeNodeLeave(node.Position)) + result;
}
return result;
}
/// <summary>
/// From
/// </summary>
/// <param name="xProductionNode"></param>
/// <returns></returns>
public static ProductionNode From(XElement xProductionNode)
{
if (xProductionNode == null)
{
return(null);
}
if (xProductionNode.Name != strProductionNode)
{
return(null);
}
var result = new ProductionNode(
xProductionNode.Attribute(strName).Value,
xProductionNode.Attribute(strNote).Value,
(EnumProductionNodePosition)Enum.Parse(
typeof(EnumProductionNodePosition),
xProductionNode.Attribute(strPosition).Value));
return(result);
}
/// <summary>
/// 5 <V> ::= <Vn>;
/// <para>6 <V> ::= <Vt>;</para>
/// <para>7 <V> ::= identifier;</para>
/// </summary>
/// <param name="syntaxTree"></param>
private static ProductionNode GetGrammarV(SyntaxTree <EnumTokenTypeCG, EnumVTypeCG, TreeNodeValueCG> syntaxTree)
{//<V> ::= <Vn> | <Vt>; 5 6
ProductionNode result = null;
if (syntaxTree.CandidateFunc == LL1SyntaxParserCG.GetFuncParsecase_V___tail_lessThan_Leave())
{
result = GetGrammarVn(syntaxTree.Children[0]);
}
else if (syntaxTree.CandidateFunc == LL1SyntaxParserCG.GetFuncParsecase_V___constStringLeave() ||
syntaxTree.CandidateFunc == LL1SyntaxParserCG.GetFuncParsecase_V___tail_constStringLeave() ||
syntaxTree.CandidateFunc == LL1SyntaxParserCG.GetFuncParsecase_V___tail_identifierLeave() ||
syntaxTree.CandidateFunc == LL1SyntaxParserCG.GetFuncParsecase_V___tail_nullLeave() ||
syntaxTree.CandidateFunc == LL1SyntaxParserCG.GetFuncParsecase_V___tail_numberLeave())
{
result = GetGrammarVt(syntaxTree.Children[0]);
}
else
{
result = new ProductionNode(EnumVTypeCG.case_V.ToString(), EnumVTypeCG.case_V.ToString(), EnumProductionNodePosition.Unknown);
}
return(result);
}
/// <summary>
/// 获取推导式列表
/// </summary>
/// <param name="leftNode">当前结非终点类型</param>
/// <param name="nextLeave">要处理的终结点类型</param>
/// <returns></returns>
public DerivationList GetDerivationList(ProductionNode leftNode, ProductionNode nextLeave)
{
//#if DEBUG
// if (this.m_LeftNodes.ContainsKey(leftNode)
// && this.m_NextLeaves.ContainsKey(nextLeave))
//#endif
// return this.GetDerivationList(this.m_LeftNodes[leftNode], this.m_NextLeaves[nextLeave]);
//#if DEBUG
// else
// return null;
//#endif
// return this.GetDerivationList(this.m_LeftNodes[leftNode], this.m_NextLeaves[nextLeave]);
string key = string.Format("Left:{0} Terminal:{1}", leftNode, nextLeave);
DerivationList list = null;
if (this.m_ParserMap.TryGetValue(key, out list))
{
return(this.m_ParserMap[key]);
}
else
{
return(new DerivationList());
}
}
/// <summary>
/// 设置某列的结点类型
/// </summary>
/// <param name="column"></param>
/// <param name="nextLeave"></param>
public void SetColumn(int column, ProductionNode nextLeave)
{
//if (0 <= column && column < this.m_ColumnCount)
// this.m_NextLeaves.Add(nextLeave, column);
}
/// <summary>
/// 设置某行的结点类型
/// </summary>
/// <param name="line"></param>
/// <param name="leftNode"></param>
public void SetLine(int line, ProductionNode leftNode)
{
//if (0 <= line && line < this.m_LineCount)
// this.m_LeftNodes.Add(leftNode, line);
}
/// <summary>
/// 对 叶结点<code>leave</code>进行分析
/// </summary>
/// <param name="leave">叶结点</param>
/// <returns></returns>
public string GetFieldFuncParseName(ProductionNode leave)
{
//return string.Format("FuncParse{0}_", ConvertToIdentifier(leave));
return string.Format("FuncParse{0}_", GetEnumVTypeSGItem(leave));
}
/// <summary>
/// 获取用于堆栈操作的一个字段
/// <para>m_constStringLeave</para>
/// <para>m_VList</para>
/// </summary>
/// <param name="node"></param>
/// <returns></returns>
public string GetFieldStackItem(ProductionNode node)
{
var result = string.Format("m_{0}", GetEnumVTypeSGItem(node));
return result;
}
/// <summary>
/// 获取此结点的复制品
/// </summary>
/// <returns></returns>
public object Clone()
{
var result = new ProductionNode(m_NodeName, m_NodeNote, m_Position);
return(result);
}
