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make grammar GrammarElementTitleSwitch more robust

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Signed-off-by: Moritz Eysholdt <moritz.eysholdt@typefox.io>
This commit is contained in:
Moritz Eysholdt 2016-08-11 14:59:00 +02:00
parent dc674d1abf
commit 9b43417e24
1 changed files with 2 additions and 0 deletions
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org.eclipse.xtext/src/org/eclipse/xtext/grammaranalysis/impl/GrammarElementTitleSwitch.java
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@ -104,6 +104,8 @@ public class GrammarElementTitleSwitch extends XtextSwitch<String> implements Fu
if (!showQualified && !showRule)
return result;
AbstractRule rule = GrammarUtil.containingRule(ele);
if (rule == null)
return "<AbstractElement not contained in AbstractRule!>:" + result;
if (!showQualified)
return result + ":" + rule.getName();
GrammarElementTitleSwitch others = copy();