Lib.Parsec.Prim.many: combinator 'many' is applied to a parser that accepts an empty string.

Ok x state' err -> error "Common.

The utility module is a set of commonly useful parsers and support classes that were found to be useful in handling common tasks such as list processing, comments, confix expressions, etc.

工具模块是一组通使用析器和支持类集合，在处理析任务，比如列表处理、注释、连接声明等时，他们很有用。