reprism/src/languages/parser.js

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export default {
  language: 'parser',
  init: Prism => {
    Prism.languages.parser = Prism.languages.extend('markup', {
      keyword: {
        pattern: /(^|[^^])(?:\^(?:case|eval|for|if|switch|throw)\b|@(?:BASE|CLASS|GET(?:_DEFAULT)?|OPTIONS|SET_DEFAULT|USE)\b)/,
        lookbehind: true,
      },
      variable: {
        pattern: /(^|[^^])\B\$(?:\w+|(?=[.{]))(?:(?:\.|::?)\w+)*(?:\.|::?)?/,
        lookbehind: true,
        inside: {
          punctuation: /\.|:+/,
        },
      },
      function: {
        pattern: /(^|[^^])\B[@^]\w+(?:(?:\.|::?)\w+)*(?:\.|::?)?/,
        lookbehind: true,
        inside: {
          keyword: {
            pattern: /(^@)(?:GET_|SET_)/,
            lookbehind: true,
          },
          punctuation: /\.|:+/,
        },
      },
      escape: {
        pattern: /\^(?:[$^;@()\[\]{}"':]|#[a-f\d]*)/i,
        alias: 'builtin',
      },
      punctuation: /[\[\](){};]/,
    })
    Prism.languages.insertBefore('parser', 'keyword', {
      'parser-comment': {
        pattern: /(\s)#.*/,
        lookbehind: true,
        alias: 'comment',
      },
      expression: {
        // Allow for 3 levels of depth
        pattern: /(^|[^^])\((?:[^()]|\((?:[^()]|\((?:[^()])*\))*\))*\)/,
        greedy: true,
        lookbehind: true,
        inside: {
          string: {
            pattern: /(^|[^^])(["'])(?:(?!\2)[^^]|\^[\s\S])*\2/,
            lookbehind: true,
          },
          keyword: Prism.languages.parser.keyword,
          variable: Prism.languages.parser.variable,
          function: Prism.languages.parser.function,
          boolean: /\b(?:true|false)\b/,
          number: /\b(?:0x[a-f\d]+|\d+\.?\d*(?:e[+-]?\d+)?)\b/i,
          escape: Prism.languages.parser.escape,
          operator: /[~+*\/\\%]|!(?:\|\|?|=)?|&&?|\|\|?|==|<[<=]?|>[>=]?|-[fd]?|\b(?:def|eq|ge|gt|in|is|le|lt|ne)\b/,
          punctuation: Prism.languages.parser.punctuation,
        },
      },
    })
    Prism.languages.insertBefore(
      'inside',
      'punctuation',
      {
        expression: Prism.languages.parser.expression,
        keyword: Prism.languages.parser.keyword,
        variable: Prism.languages.parser.variable,
        function: Prism.languages.parser.function,
        escape: Prism.languages.parser.escape,
        'parser-punctuation': {
          pattern: Prism.languages.parser.punctuation,
          alias: 'punctuation',
        },
      },
      Prism.languages.parser.tag.inside['attr-value']
    )
  },
}