Notice that there are two successful branches from the top rule expr.
注意,頂層規(guī)則expr有兩個(gè)成功的分支.
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Splits the string EXPR into a list of strings and returns that list.
分割字符串EXPR為字符串列表并且返回這個(gè)列表.
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Forces EXPR to be interpreted in scalar context and returns the value of EXPR.
強(qiáng)制EXPR運(yùn)行在標(biāo)量上下文下并返回EXPR的值.
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