Method getParentClosure

src/org/antlr/codebuff/Trainer.java:410–416

Return first ancestor of p that is not an only child including p. So if p.getParent().getChildCount()>1, this returns p. If we have found a chain rule at p's parent (p is its only child), then move p to its parent and try again.

(ParserRuleContext p)

	 *  move p to its parent and try again.
	 */
	public static ParserRuleContext getParentClosure(ParserRuleContext p) {
		if ( p==null ) return null;
		// if p not an only child, return p
		if ( p.getParent()==null || p.getParent().getChildCount()>1 ) return p;
		// we found a chain rule node
		return getParentClosure(p.getParent());
	}

	/** Walk upwards from node while p.start == token; return null if there is
	 *  no ancestor starting at token.