The non - terminal and the current scanner are also passed as arguments.

同样 非 终结符和当前扫描器也作为参数被传入.

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If this is not desirable, we can pass constructor arguments to the non - terminal.

如果这不是我们想要的, 我们可以把构造函数的参数传给 非 终结符.

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It is created before parsing and destructed after the non - terminal's parse member function exits.

它在分析前构造并在离开 非 终结符的分析函数之后析构.

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