public void addStatement(IStatement statement) throws ParseException {
if (statement instanceof $sectionelse) {
if (elseBlock != null) {
throw new ParseException("不能重复定义sectionelse");
} else {
elseBlock = new BlockStatement();
elseBlock.setParent(this.getParent());
}
} else if (elseBlock != null) {
elseBlock.addStatement(statement);
} else {