public virtual Grammar.LabelElementPair GetRuleListLabel(string name)
{
Grammar.LabelElementPair pair = null;
if (ruleListLabels != null)
{
return((Grammar.LabelElementPair)ruleListLabels.get(name));
}
return(pair);
}
public virtual Grammar.LabelElementPair GetTokenLabel(string name)
{
Grammar.LabelElementPair pair = null;
if (tokenLabels != null)
{
return((Grammar.LabelElementPair)tokenLabels.get(name));
}
return(pair);
}
public virtual Grammar.LabelElementPair GetRuleListLabel(string name)
{
Grammar.LabelElementPair pair = null;
if (RuleListLabels != null)
{
RuleListLabels.TryGetValue(name, out pair);
}
return(pair);
}
public virtual void DefineLabel(IToken label, GrammarAST elementRef, LabelType type)
{
Grammar.LabelElementPair pair = new Grammar.LabelElementPair(Grammar, label, elementRef);
pair.type = type;
LabelNameSpace[label.Text] = pair;
switch (type)
{
case LabelType.Token:
TokenLabels = TokenLabels ?? new Dictionary <string, Grammar.LabelElementPair>();
TokenLabels[label.Text] = pair;
break;
case LabelType.WildcardTree:
WildcardTreeLabels = WildcardTreeLabels ?? new Dictionary <string, Grammar.LabelElementPair>();
WildcardTreeLabels[label.Text] = pair;
break;
case LabelType.WildcardTreeList:
WildcardTreeListLabels = WildcardTreeListLabels ?? new Dictionary <string, Grammar.LabelElementPair>();
WildcardTreeListLabels[label.Text] = pair;
break;
case LabelType.Rule:
_ruleLabels = _ruleLabels ?? new Dictionary <string, Grammar.LabelElementPair>();
_ruleLabels[label.Text] = pair;
break;
case LabelType.TokenList:
TokenListLabels = TokenListLabels ?? new Dictionary <string, Grammar.LabelElementPair>();
TokenListLabels[label.Text] = pair;
break;
case LabelType.RuleList:
_ruleListLabels = _ruleListLabels ?? new Dictionary <string, Grammar.LabelElementPair>();
_ruleListLabels[label.Text] = pair;
break;
case LabelType.Char:
CharLabels = CharLabels ?? new Dictionary <string, Grammar.LabelElementPair>();
CharLabels[label.Text] = pair;
break;
case LabelType.CharList:
CharListLabels = CharListLabels ?? new Dictionary <string, Grammar.LabelElementPair>();
CharListLabels[label.Text] = pair;
break;
default:
throw new ArgumentException(string.Format("Unexpected label type {0}.", type), "type");
}
}
private void HandleAttributeMemberReference(string attribute, string member)
{
AttributeScope scope = null;
string refdRuleName = null;
if (attribute.Equals(enclosingRule.Name))
{
// ref to enclosing rule.
refdRuleName = attribute;
scope = enclosingRule.GetLocalAttributeScope(member);
}
else if (enclosingRule.GetRuleLabel(attribute) != null)
{
// ref to rule label
Grammar.LabelElementPair pair = enclosingRule.GetRuleLabel(attribute);
pair.actionReferencesLabel = true;
refdRuleName = pair.referencedRuleName;
Rule refdRule = grammar.GetRule(refdRuleName);
if (refdRule != null)
{
scope = refdRule.GetLocalAttributeScope(member);
}
}
else if (enclosingRule.GetRuleRefsInAlt(attribute, outerAltNum) != null)
{
// ref to rule referenced in this alt
refdRuleName = attribute;
Rule refdRule = grammar.GetRule(refdRuleName);
if (refdRule != null)
{
scope = refdRule.GetLocalAttributeScope(member);
}
}
if (scope != null && (scope.IsPredefinedRuleScope || scope.IsPredefinedLexerRuleScope))
{
grammar.ReferenceRuleLabelPredefinedAttribute(refdRuleName);
//System.Console.WriteLine("referenceRuleLabelPredefinedAttribute for " + refdRuleName);
}
}
/** If type of previous label differs from new label's type, that's an error.
*/
public virtual bool CheckForLabelTypeMismatch(Rule r, IToken label, LabelType type)
{
Grammar.LabelElementPair prevLabelPair =
(Grammar.LabelElementPair)r.labelNameSpace.get(label.Text);
if (prevLabelPair != null)
{
// label already defined; if same type, no problem
if (prevLabelPair.type != type)
{
string typeMismatchExpr =
Grammar.LabelTypeToString[(int)type] + "!=" +
Grammar.LabelTypeToString[(int)prevLabelPair.type];
ErrorManager.GrammarError(
ErrorManager.MSG_LABEL_TYPE_CONFLICT,
grammar,
label,
label.Text,
typeMismatchExpr);
return(true);
}
}
return(false);
}
private void HandleRuleLabelReference(string ruleLabel)
{
Grammar.LabelElementPair pair = enclosingRule.GetRuleLabel(ruleLabel);
pair.actionReferencesLabel = true;
}
