refractor/lang/c.js

Lightweight, robust, elegant virtual syntax highlighting using Prism

'use strict';

module.exports = c;
c.displayName = 'c';
c.aliases = [];
function c(Prism) {
  Prism.languages.c = Prism.languages.extend('clike', {
    keyword: /\b(?:_Alignas|_Alignof|_Atomic|_Bool|_Complex|_Generic|_Imaginary|_Noreturn|_Static_assert|_Thread_local|asm|typeof|inline|auto|break|case|char|const|continue|default|do|double|else|enum|extern|float|for|goto|if|int|long|register|return|short|signed|sizeof|static|struct|switch|typedef|union|unsigned|void|volatile|while)\b/,
    operator: /-[>-]?|\+\+?|!=?|<<?=?|>>?=?|==?|&&?|\|\|?|[~^%?*\/]/,
    number: /\b-?(?:0x[\da-f]+|\d*\.?\d+(?:e[+-]?\d+)?)[ful]*\b/i
  });
  Prism.languages.insertBefore('c', 'string', {
    macro: {
      // allow for multiline macro definitions
      // spaces after the # character compile fine with gcc
      pattern: /(^\s*)#\s*[a-z]+(?:[^\r\n\\]|\\(?:\r\n|[\s\S]))*/im,
      lookbehind: true,
      alias: 'property',
      inside: {
        // highlight the path of the include statement as a string
        string: {
          pattern: /(#\s*include\s*)(?:<.+?>|("|')(?:\\?.)+?\2)/,
          lookbehind: true
        },
        // highlight macro directives as keywords
        directive: {
          pattern: /(#\s*)\b(?:define|defined|elif|else|endif|error|ifdef|ifndef|if|import|include|line|pragma|undef|using)\b/,
          lookbehind: true,
          alias: 'keyword'
        }
      }
    },
    // highlight predefined macros as constants
    constant: /\b(?:__FILE__|__LINE__|__DATE__|__TIME__|__TIMESTAMP__|__func__|EOF|NULL|SEEK_CUR|SEEK_END|SEEK_SET|stdin|stdout|stderr)\b/
  });
  delete Prism.languages.c['class-name'];
  delete Prism.languages.c['boolean'];
}