A lack of a pure Ruby parser has been negligible for some time in Ruby's history, since getting the Abstract Syntax Tree (AST) of some Ruby code was possible with utilities such as ParseTree.

因为可以使用类似语法分析树(ParseTree)的通用方法来对Ruby代码进行分析并获得抽象语法树(Abstract Syntax Tree)，所以在Ruby历史上的一定时期内，纯ruby语法分析器的缺失被忽视了。

youdao

A lack of a pure Ruby parser has been negligible for some time in Ruby's history, since getting the Abstract Syntax Tree (AST) of some Ruby code was possible with utilities such as ParseTree.

因为可以使用类似语法分析树(ParseTree)的通用方法来对Ruby代码进行分析并获得抽象语法树(Abstract Syntax Tree)，所以在Ruby历史上的一定时期内，纯ruby语法分析器的缺失被忽视了。

youdao