How to use an Alex monadic lexer with Happy?
如何使用一个亚历克斯一元词法分析器与快乐吗？
A good lexer example can help a lot with learning how to write a tokenizer.
一个好的lexer例子会非常有助于学习如何编写断词器（tokenizer）。
Whenever possible, try to develop separate tests for your lexer and your parser.
只要有可能，请尝试为您的lexer和解析器开发单独的测试。
Whenever possible, try to develop separate tests for your lexer and your parser.
只要有可能，请尝试为您的lexer和解析器开发单独的测试。
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