为什么Ruby/[[:: punct:]]/会错过一些标点符号? [英] Why does Ruby /[[:punct:]]/ miss some punctuation characters?

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:

定义要归类为标点符号的字符.在POSIX语言环境中，<space>或类alpha，digit或cntrl中的任何字符均不应包含在内.在语言环境定义文件中，没有为关键字"upper"，"lower"，"alpha"，"digit"，"cntrl"，"xdigit"或."指定任何字符.

Define characters to be classified as punctuation characters. In the POSIX locale, neither the <space> nor any characters in classes alpha, digit, or cntrl shall be included. In a locale definition file, no character specified for the keywords upper, lower, alpha, digit, cntrl, xdigit, or as the shall be specified.

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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