问题描述
Ruby /[[:punct:]]/应该匹配所有标点符号".根据 Wikipedia 的说法，这表示每个POSIX标准为/[\]\[!"#$%&'()*+,./:;<=>?@\^_`{|}~-]/.
Ruby /[[:punct:]]/ is supposed to match all "punctuation characters". According to Wikipedia, this means /[\]\[!"#$%&'()*+,./:;<=>?@\^_`{|}~-]/ per POSIX standard.
它匹配:-[]\;',./!@#%&*()_{}::"?.
但是，它与不不匹配:=`~$^+|<>(至少在ruby 1.9.3p194中).
However, it does not match: =`~$^+|<> (at least in ruby 1.9.3p194).
有什么作用?
推荐答案
标点符号类由语言环境定义.开放小组对打孔的LC_TYPE定义说:
The punctuation character class is defined by the locale. The Open Group LC_TYPE definition for punct says:
基本上，它定义了如何通过合并其他字符类来定义 punct 的方法，但实际上并没有直接定义标点符号-这是语言环境的工作.
Basically, it defines how punct can be defined by exluding other character classes, but it doesn't actually define the punctuation symbols directly--that's the locale's job.
我找不到每个语言环境中的规范引用.也许别人知道.同时，您可以找到与所需的 punct 字符类匹配的LC_TYPE，或者直接指定该类.
I couldn't find a canonical reference to what is in each locale. Maybe someone else knows. Meanwhile, you can find an LC_TYPE that matches the punct character class you want, or just specify the class directly.
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