.config/coc/extensions/node_modules/coc-prettier/node_modules/posix-character-classes/README.md

   1 # posix-character-classes [![NPM version](https://img.shields.io/npm/v/posix-character-classes.svg?style=flat)](https://www.npmjs.com/package/posix-character-classes) [![NPM monthly downloads](https://img.shields.io/npm/dm/posix-character-classes.svg?style=flat)](https://npmjs.org/package/posix-character-classes)  [![NPM total downloads](https://img.shields.io/npm/dt/posix-character-classes.svg?style=flat)](https://npmjs.org/package/posix-character-classes) [![Linux Build Status](https://img.shields.io/travis/jonschlinkert/posix-character-classes.svg?style=flat&label=Travis)](https://travis-ci.org/jonschlinkert/posix-character-classes)
   2
   3 > POSIX character classes for creating regular expressions.
   4
   5 ## Install
   6
   7 Install with [npm](https://www.npmjs.com/):
   8
   9 ```sh
  10 $ npm install --save posix-character-classes
  11 ```
  12
  13 Install with [yarn](https://yarnpkg.com):
  14
  15 ```sh
  16 $ yarn add posix-character-classes
  17 ```
  18
  19 ## Usage
  20
  21 ```js
  22 var posix = require('posix-character-classes');
  23 console.log(posix.alpha);
  24 //=> 'A-Za-z'
  25 ```
  26
  27 ## POSIX Character classes
  28
  29 The POSIX standard supports the following classes or categories of charactersh (note that classes must be defined within brackets)<sup class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup>:
  30
  31 | **POSIX class** | **Equivalent to** | **Matches** |
  32 | --- | --- | --- |
  33 | `[:alnum:]` | `[A-Za-z0-9]` | digits, uppercase and lowercase letters |
  34 | `[:alpha:]` | `[A-Za-z]` | upper- and lowercase letters |
  35 | `[:ascii:]` | `[\x00-\x7F]` | ASCII characters |
  36 | `[:blank:]` | `[ \t]` | space and TAB characters only |
  37 | `[:cntrl:]` | `[\x00-\x1F\x7F]` | Control characters |
  38 | `[:digit:]` | `[0-9]` | digits |
  39 | `[:graph:]` | `[^[:cntrl:]]` | graphic characters (all characters which have graphic representation) |
  40 | `[:lower:]` | `[a-z]` | lowercase letters |
  41 | `[:print:]` | `[[:graph] ]` | graphic characters and space |
  42 | `[:punct:]` | ``[-!"#$%&'()*+,./:;<=>?@[]^_`{ | }~]`` | all punctuation characters (all graphic characters except letters and digits) |
  43 | `[:space:]` | `[ \t\n\r\f\v]` | all blank (whitespace) characters, including spaces, tabs, new lines, carriage returns, form feeds, and vertical tabs |
  44 | `[:upper:]` | `[A-Z]` | uppercase letters |
  45 | `[:word:]` | `[A-Za-z0-9_]` | word characters |
  46 | `[:xdigit:]` | `[0-9A-Fa-f]` | hexadecimal digits |
  47
  48 ## Examples
  49
  50 * `a[[:digit:]]b` matches `a0b`, `a1b`, ..., `a9b`.
  51 * `a[:digit:]b` is invalid, character classes must be enclosed in brackets
  52 * `[[:digit:]abc]` matches any digit, as well as `a`, `b`, and `c`.
  53 * `[abc[:digit:]]` is the same as the previous, matching any digit, as well as `a`, `b`, and `c`
  54 * `[^ABZ[:lower:]]` matches any character except lowercase letters, `A`, `B`, and `Z`.
  55
  56 ## About
  57
  58 ### Contributing
  59
  60 Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](../../issues/new).
  61
  62 ### Building docs
  63
  64 _(This project's readme.md is generated by [verb](https://github.com/verbose/verb-generate-readme), please don't edit the readme directly. Any changes to the readme must be made in the [.verb.md](.verb.md) readme template.)_
  65
  66 To generate the readme, run the following command:
  67
  68 ```sh
  69 $ npm install -g verbose/verb#dev verb-generate-readme && verb
  70 ```
  71
  72 ### Running tests
  73
  74 Running and reviewing unit tests is a great way to get familiarized with a library and its API. You can install dependencies and run tests with the following command:
  75
  76 ```sh
  77 $ npm install && npm test
  78 ```
  79
  80 ### Author
  81
  82 **Jon Schlinkert**
  83
  84 * [github/jonschlinkert](https://github.com/jonschlinkert)
  85 * [twitter/jonschlinkert](https://twitter.com/jonschlinkert)
  86
  87 ### License
  88
  89 Copyright © 2017, [Jon Schlinkert](https://github.com/jonschlinkert).
  90 Released under the [MIT License](LICENSE).
  91
  92 ***
  93
  94 _This file was generated by [verb-generate-readme](https://github.com/verbose/verb-generate-readme), v0.5.0, on April 20, 2017._
  95
  96 <hr class="footnotes-sep">
  97 <section class="footnotes">
  98 <ol class="footnotes-list">
  99 <li id="fn1"  class="footnote-item">table and examples are based on the WikiBooks page for [Regular Expressions/POSIX Basic Regular Expressions](https://en.wikibooks.org/wiki/Regular_Expressions/POSIX_Basic_Regular_Expressions), which is available under the [Creative Commons Attribution-ShareAlike License](https://creativecommons.org/licenses/by-sa/3.0/). <a href="#fnref1" class="footnote-backref">↩</a>
 100
 101 </li>
 102 </ol>
 103 </section>