code: function(sourceOrProgram, filename) {
          
          if (!(this instanceof MetaScript)) {
              __version = Array.prototype.join.call(arguments, '.');
              return;
          }
          
          // Whether constructing from a meta program or, otherwise, a source
          var isProgram = (sourceOrProgram+="").substring(0, 11) === 'MetaScript(';
          
          /**
           * Original source.
           * @type {?string}
           */
          this.source = isProgram ? null : sourceOrProgram;
  
          /**
           * Original source file name.
           * @type {string}
           */
          this.filename = filename || "main";
  
          /**
           * The compiled meta program's source.
           * @type {string}
           */
          this.program = isProgram ? sourceOrProgram : MetaScript.compile(sourceOrProgram);
      }
docs: Constructs a new MetaScript instance.
  @exports MetaScript
  @param {string} sourceOrProgram Source to compile or meta program to run
  @param {string=} filename Source file name if known, defaults to `"main"`.
  @constructor