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  • Xing Ping Zhang thinks this is interesting:

As we’ve seen, Scala identifiers can have nonalphanumeric characters, with a few exceptions that we’ll go over in a moment.

From

Cover of Programming Scala, 2nd Edition

Note

Scala中的标识符是可以含有非a-z的字符的,极少数情况例外。那这些少数情况是啥?