Prism.languages.twig = {
  comment: /^\{#[\s\S]*?#\}$/,

  'tag-name': {
    pattern: /(^\{%-?\s*)\w+/,
    lookbehind: true,
    alias: 'keyword',
  },
  delimiter: {
    pattern: /^\{[{%]-?|-?[%}]\}$/,
    alias: 'punctuation',
  },

  string: {
    pattern: /("|')(?:\\.|(?!\1)[^\\\r\n])*\1/,
    inside: {
      punctuation: /^['"]|['"]$/,
    },
  },
  keyword: /\b(?:even|if|odd)\b/,
  boolean: /\b(?:false|null|true)\b/,
  number: /\b0x[\dA-Fa-f]+|(?:\b\d+(?:\.\d*)?|\B\.\d+)(?:[Ee][-+]?\d+)?/,
  operator: [
    {
      pattern:
        /(\s)(?:and|b-and|b-or|b-xor|ends with|in|is|matches|not|or|same as|starts with)(?=\s)/,
      lookbehind: true,
    },
    /[=<>]=?|!=|\*\*?|\/\/?|\?:?|[-+~%|]/,
  ],
  punctuation: /[()\[\]{}:.,]/,
};

Prism.hooks.add('before-tokenize', function (env) {
  if (env.language !== 'twig') {
    return;
  }

  var pattern = /\{(?:#[\s\S]*?#|%[\s\S]*?%|\{[\s\S]*?\})\}/g;
  Prism.languages['markup-templating'].buildPlaceholders(env, 'twig', pattern);
});

Prism.hooks.add('after-tokenize', function (env) {
  Prism.languages['markup-templating'].tokenizePlaceholders(env, 'twig');
});