SqlParser.java 文件源码

@Override
public void exitNonReserved(SqlBaseParser.NonReservedContext context)
{
    // we can't modify the tree during rule enter/exit event handling unless we're dealing with a terminal.
    // Otherwise, ANTLR gets confused an fires spurious notifications.
    if (!(context.getChild(0) instanceof TerminalNode)) {
        int rule = ((ParserRuleContext) context.getChild(0)).getRuleIndex();
        throw new AssertionError("nonReserved can only contain tokens. Found nested rule: " + ruleNames.get(rule));
    }

    // replace nonReserved words with IDENT tokens
    context.getParent().removeLastChild();

    Token token = (Token) context.getChild(0).getPayload();
    context.getParent().addChild(new CommonToken(
            new Pair<>(token.getTokenSource(), token.getInputStream()),
            SqlBaseLexer.IDENTIFIER,
            token.getChannel(),
            token.getStartIndex(),
            token.getStopIndex()));
}