/**
* Consume and return the {@linkplain #getCurrentToken current symbol}.
*
* <p>E.g., given the following input with {@code A} being the current lookahead symbol, this
* function moves the cursor to {@code B} and returns {@code A}.
*
* <pre>
* A B
* ^
* </pre>
*
* If the parser is not in error recovery mode, the consumed symbol is added to the parse tree
* using {@link ParserRuleContext#addChild(Token)}, and {@link ParseTreeListener#visitTerminal} is
* called on any parse listeners. If the parser <em>is</em> in error recovery mode, the consumed
* symbol is added to the parse tree using {@link ParserRuleContext#addErrorNode(Token)}, and
* {@link ParseTreeListener#visitErrorNode} is called on any parse listeners.
*/
public Token consume() {
Token o = getCurrentToken();
if (o.getType() != EOF) {
getInputStream().consume();
}
boolean hasListener = _parseListeners != null && !_parseListeners.isEmpty();
if (_buildParseTrees || hasListener) {
if (_errHandler.inErrorRecoveryMode(this)) {
ErrorNode node = _ctx.addErrorNode(o);
if (_parseListeners != null) {
for (ParseTreeListener listener : _parseListeners) {
listener.visitErrorNode(node);
}
}
} else {
TerminalNode node = _ctx.addChild(o);
if (_parseListeners != null) {
for (ParseTreeListener listener : _parseListeners) {
listener.visitTerminal(node);
}
}
}
}
return o;
}
public void walk(ParseTreeListener listener, ParseTree t) {
if (t instanceof ErrorNode) {
listener.visitErrorNode((ErrorNode) t);
return;
} else if (t instanceof TerminalNode) {
listener.visitTerminal((TerminalNode) t);
return;
}
GlobalInfo info = GlobalInfo.getInstance();
info.setNotVisitNodes(new ArrayList<Integer>());
RuleNode r = (RuleNode) t;
enterRule(listener, r);
int n = r.getChildCount();
for (int i = 0; i < n; i++) {
Boolean found = false;
for (int j = 0; j < info.getNotVisitNodes().size(); ++j) {
if (info.getNotVisitNodes().get(j).equals(i)) {
found = true;
break;
}
}
if (!found) {
List<Integer> aux = info.getNotVisitNodes();
info.setNotVisitNodes(new ArrayList<Integer>());
walk(listener, r.getChild(i));
info.setNotVisitNodes(aux);
}
}
exitRule(listener, r);
info.setNotVisitNodes(new ArrayList<Integer>());
}
/**
* Notify any parse listeners of an exit rule event.
*
* @see #addParseListener
*/
protected void triggerExitRuleEvent() {
// reverse order walk of listeners
for (int i = _parseListeners.size() - 1; i >= 0; i--) {
ParseTreeListener listener = _parseListeners.get(i);
_ctx.exitRule(listener);
listener.exitEveryRule(_ctx);
}
}
protected void exitRule(ParseTreeListener listener, RuleNode r) {
ParserRuleContext ctx = (ParserRuleContext) r.getRuleContext();
ctx.exitRule(listener);
listener.exitEveryRule(ctx);
GlobalInfo info = GlobalInfo.getInstance();
info.exitRuleSetup();
}
/**
* Notify any parse listeners of an enter rule event.
*
* @see #addParseListener
*/
protected void triggerEnterRuleEvent() {
for (ParseTreeListener listener : _parseListeners) {
listener.enterEveryRule(_ctx);
_ctx.enterRule(listener);
}
}