As a project for learning rust, I am writing a program which can parse sgf files (a format for storing go games, and technically also other games). Currently the program is supposed to parse strings of the type (this is just an exampel) As a project for learning rust, I am writing a
阅读背景：
调用一个函数，该函数关闭两次，并使用不同的闭包。
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