本文整理汇总了C#中Antlr4.Tool.Ast.GrammarAST.DupTree方法的典型用法代码示例。如果您正苦于以下问题：C# GrammarAST.DupTree方法的具体用法？C# GrammarAST.DupTree怎么用？C# GrammarAST.DupTree使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Antlr4.Tool.Ast.GrammarAST的用法示例。
在下文中一共展示了GrammarAST.DupTree方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: TranslateLeftFactoredElement
//.........这里部分代码省略.........
}
string marker = mode.IncludeFactoredAlts() ? ATNSimulator.RuleLfVariantMarker : ATNSimulator.RuleNolfVariantMarker;
element.SetText(element.Text + marker + factoredRule);
GrammarAST root = (GrammarAST)adaptor.Nil();
if (includeFactoredElement)
{
Debug.Assert(mode.IncludeFactoredAlts());
RuleRefAST factoredRuleRef = new RuleRefAST(adaptor.CreateToken(ANTLRParser.RULE_REF, factoredRule));
factoredRuleRef.SetOption(SUPPRESS_ACCESSOR, (GrammarAST)adaptor.Create(ANTLRParser.ID, "true"));
Rule factoredRuleDef = _rules[factoredRule];
if (factoredRuleDef is LeftRecursiveRule)
{
factoredRuleRef.SetOption(LeftRecursiveRuleTransformer.PRECEDENCE_OPTION_NAME, (GrammarAST)adaptor.Create(ANTLRParser.INT, "0"));
}
if (factoredRuleDef.args != null && factoredRuleDef.args.Size() > 0)
{
throw new NotImplementedException("Cannot left-factor rules with arguments yet.");
}
adaptor.AddChild(root, factoredRuleRef);
}
adaptor.AddChild(root, element);
return root;
}
case ANTLRParser.BLOCK:
{
GrammarAST cloned = element.DupTree();
if (!TranslateLeftFactoredDecision(cloned, factoredRule, variant, mode, includeFactoredElement))
{
return null;
}
if (cloned.ChildCount != 1)
{
return null;
}
GrammarAST root = (GrammarAST)adaptor.Nil();
for (int i = 0; i < cloned.GetChild(0).ChildCount; i++)
{
adaptor.AddChild(root, cloned.GetChild(0).GetChild(i));
}
return root;
}
case ANTLRParser.POSITIVE_CLOSURE:
{
/* a+
*
* =>
*
* factoredElement a_factored a*
*/
GrammarAST originalChildElement = (GrammarAST)element.GetChild(0);
GrammarAST translatedElement = TranslateLeftFactoredElement(originalChildElement.DupTree(), factoredRule, variant, mode, includeFactoredElement);
if (translatedElement == null)
{示例2: ExpandOptionalQuantifiersForAlt
protected virtual GrammarAST ExpandOptionalQuantifiersForAlt(GrammarAST alt)
{
if (alt.ChildCount == 0)
{
return null;
}
if (alt.GetChild(0).Type == ANTLRParser.OPTIONAL)
{
GrammarAST root = (GrammarAST)adaptor.Nil();
GrammarAST alt2 = alt.DupTree();
alt2.DeleteChild(0);
if (alt2.ChildCount == 0)
{
adaptor.AddChild(alt2, adaptor.Create(ANTLRParser.EPSILON, "EPSILON"));
}
alt.SetChild(0, alt.GetChild(0).GetChild(0));
if (alt.GetChild(0).Type == ANTLRParser.BLOCK && alt.GetChild(0).ChildCount == 1 && alt.GetChild(0).GetChild(0).Type == ANTLRParser.ALT)
{
GrammarAST list = (GrammarAST)adaptor.Nil();
foreach (object tree in ((GrammarAST)alt.GetChild(0).GetChild(0)).Children)
{
adaptor.AddChild(list, tree);
}
adaptor.ReplaceChildren(alt, 0, 0, list);
}
adaptor.AddChild(root, alt);
adaptor.AddChild(root, alt2);
return root;
}
else if (alt.GetChild(0).Type == ANTLRParser.CLOSURE)
{
GrammarAST root = (GrammarAST)adaptor.Nil();
GrammarAST alt2 = alt.DupTree();
alt2.DeleteChild(0);
if (alt2.ChildCount == 0)
{
adaptor.AddChild(alt2, adaptor.Create(ANTLRParser.EPSILON, "EPSILON"));
}
PlusBlockAST plusBlockAST = new PlusBlockAST(ANTLRParser.POSITIVE_CLOSURE, adaptor.CreateToken(ANTLRParser.POSITIVE_CLOSURE, "+"), null);
for (int i = 0; i < alt.GetChild(0).ChildCount; i++)
{
plusBlockAST.AddChild(alt.GetChild(0).GetChild(i));
}
alt.SetChild(0, plusBlockAST);
adaptor.AddChild(root, alt);
adaptor.AddChild(root, alt2);
return root;
}
return alt;
}