ArrowWhitespaceListener.java 文件源码

@Override
public void enterFunctionType(SwiftParser.FunctionTypeContext ctx) {
    Optional<ParseTree> arrowOptional = ctx.children.stream()
        .filter(node -> node.getText().equals("->"))
        .findFirst();
    if (!arrowOptional.isPresent()) {
        return;
    }
    ParseTree arrow = arrowOptional.get();
    Token left = ParseTreeUtil.getStopTokenForNode(ParseTreeUtil.getLeftSibling(arrow));
    Token right = ParseTreeUtil.getStartTokenForNode(ParseTreeUtil.getRightSibling(arrow));

    verifyArrowIsSpaceDelimited(left, right, ((TerminalNodeImpl) arrow).getSymbol());
}