docs: function(hljs) {
    var LASSO_IDENT_RE = '[a-zA-Z_][a-zA-Z0-9_.]*';
    var LASSO_ANGLE_RE = '<\\?(lasso(script)?|=)';
    var LASSO_CLOSE_RE = '\\]|\\?>';
    var LASSO_KEYWORDS = {
      literal:
        'true false none minimal full all void and or not ' +
        'bw nbw ew new cn ncn lt lte gt gte eq neq rx nrx ft',
      built_in:
        'array date decimal duration integer map pair string tag xml null ' +
        'bytes list queue set stack staticarray tie local var variable ' +
        'global data self inherited',
      keyword:
        'error_code error_msg error_pop error_push error_reset cache ' +
        'database_names database_schemanames database_tablenames define_tag ' +
        'define_type email_batch encode_set html_comment handle handle_error ' +
        'header if inline iterate ljax_target link link_currentaction ' +
        'link_currentgroup link_currentrecord link_detail link_firstgroup ' +
        'link_firstrecord link_lastgroup link_lastrecord link_nextgroup ' +
        'link_nextrecord link_prevgroup link_prevrecord log loop ' +
        'namespace_using output_none portal private protect records referer ' +
        'referrer repeating resultset rows search_args search_arguments ' +
        'select sort_args sort_arguments thread_atomic value_list while ' +
        'abort case else if_empty if_false if_null if_true loop_abort ' +
        'loop_continue loop_count params params_up return return_value ' +
        'run_children soap_definetag soap_lastrequest soap_lastresponse ' +
        'tag_name ascending average by define descending do equals ' +
        'frozen group handle_failure import in into join let match max ' +
        'min on order parent protected provide public require returnhome ' +
        'skip split_thread sum take thread to trait type where with ' +
        'yield yieldhome'
    };
    var HTML_COMMENT = {
      className: 'comment',
      begin: '<!--', end: '-->',
      relevance: 0
    };
    var LASSO_NOPROCESS = {
      className: 'preprocessor',
      begin: '\\[noprocess\\]',
      starts: {
        className: 'markup',
        end: '\\[/noprocess\\]',
        returnEnd: true,
        contains: [HTML_COMMENT]
      }
    };
    var LASSO_START = {
      className: 'preprocessor',
      begin: '\\[/noprocess|' + LASSO_ANGLE_RE
    };
    var LASSO_DATAMEMBER = {
      className: 'variable',
      begin: '\'' + LASSO_IDENT_RE + '\''
    };
    var LASSO_CODE = [
      hljs.C_LINE_COMMENT_MODE,
      {
        className: 'javadoc',
        begin: '/\\*\\*!', end: '\\*/',
        contains: [hljs.PHRASAL_WORDS_MODE]
      },
      hljs.C_BLOCK_COMMENT_MODE,
      hljs.inherit(hljs.C_NUMBER_MODE, {begin: hljs.C_NUMBER_RE + '|-?(infinity|nan)\\b'}),
      hljs.inherit(hljs.APOS_STRING_MODE, {illegal: null}),
      hljs.inherit(hljs.QUOTE_STRING_MODE, {illegal: null}),
      {
        className: 'string',
        begin: '`', end: '`'
      },
      {
        className: 'variable',
        variants: [
          {
            begin: '[#$]' + LASSO_IDENT_RE
          },
          {
            begin: '#', end: '\\d+',
            illegal: '\\W'
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        ]
      },
      {
        className: 'tag',
        begin: '::\\s*', end: LASSO_IDENT_RE,
        illegal: '\\W'
      },
      {
        className: 'attribute',
        variants: [
          {
            begin: '-' + hljs.UNDERSCORE_IDENT_RE,
            relevance: 0
          },
          {
            begin: '(\\.\\.\\.)'
          }
        ]
      },
      {
        className: 'subst',
        variants: [
          {
            begin: '->\\s*',
            contains: [LASSO_DATAMEMBER]
          },
          {
            begin: ':=|/(?!\\w)=?|[-+*%=<>&|!?\\\\]+',
            relevance: 0
          }
        ]
      },
      {
        className: 'built_in',
        begin: '\\.\\.?',
        relevance: 0,
        contains: [LASSO_DATAMEMBER]
      },
      {
        className: 'class',
        beginKeywords: 'define',
        returnEnd: true, end: '\\(|=>',
        contains: [
          hljs.inherit(hljs.TITLE_MODE, {begin: hljs.UNDERSCORE_IDENT_RE + '(=(?!>))?'})
        ]
      }
    ];
    return {
      aliases: ['ls', 'lassoscript'],
      case_insensitive: true,
      lexemes: LASSO_IDENT_RE + '|&[lg]t;',
      keywords: LASSO_KEYWORDS,
      contains: [
        {
          className: 'preprocessor',
          begin: LASSO_CLOSE_RE,
          relevance: 0,
          starts: {
            className: 'markup',
            end: '\\[|' + LASSO_ANGLE_RE,
            returnEnd: true,
            relevance: 0,
            contains: [HTML_COMMENT]
          }
        },
        LASSO_NOPROCESS,
        LASSO_START,
        {
          className: 'preprocessor',
          begin: '\\[no_square_brackets',
          starts: {
            end: '\\[/no_square_brackets\\]', // not implemented in the language
            lexemes: LASSO_IDENT_RE + '|&[lg]t;',
            keywords: LASSO_KEYWORDS,
            contains: [
              {
                className: 'preprocessor',
                begin: LASSO_CLOSE_RE,
                relevance: 0,
                starts: {
                  className: 'markup',
                  end: LASSO_ANGLE_RE,
                  returnEnd: true,
                  contains: [HTML_COMMENT]
                }
              },
              LASSO_NOPROCESS,
              LASSO_START
            ].concat(LASSO_CODE)
          }
        },
        {
          className: 'preprocessor',
          begin: '\\[',
          relevance: 0
        },
        {
          className: 'shebang',
          begin: '^#!.+lasso9\\b',
          relevance: 10
        }
      ].concat(LASSO_CODE)
    };
  }