This function is not smart enough to identify the character values in the final example of use and thus be able to warn the user. You could use a string patternmatching test such as.
这个函数还不够灵巧，不能区分最后使用的示例中的字符值，所以不能警告用户。
2
You can use an underscore (Scala's standard wild card character) as a placeholder to catch any type of exception (really, to match any case in a patternmatching expression).
Misuse intrusion testing technology is the most important link in a patternmatching the current model of matching reported mainly on the text of character string matching.