E'（表达式素数）是什么意思？
[英]What does E' (Expression Prime) mean?
问题描述
So, I'm studying Compiler Construction and stucked in this grammar 
因此，我正在研究编译器构造，并坚持使用此语法
E->TE' E->+TE' and so on.... My question is What does the E' means actually ? E-> TE'E-> + TE'，依此类推。...我的问题是E'实际上是什么意思？
1 个解决方案
解决方案1
1 2014-05-12 18:09:46
The ' does not have any inherent meaning - it's just part of the name. “ '没有任何内在含义-只是名称的一部分。 That is E' is simply a rule named E' . 即E'只是一个名为E'的规则。
The usual reason you'd name the rule E' instead of just picking a new letter like F would be to express that E and E' are related somehow. 您将规则命名为E'而不是仅仅选择一个像F这样的新字母的通常原因是，它表示E和E'存在某种联系。
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