code: function(name, valueName) {
        if (this.__scope.vars[name] === undefined) {
          this.__scope.vars[name] = valueName || true;
          var unresolved = this.__scope.unresolved;
          delete unresolved[name];
          var re = new RegExp(name + "\\.");
          for (var tmp in unresolved) {
            if (re.test(tmp)) {
              delete unresolved[tmp];
            }
          }
        }
      }
docs: Adds a variable declaration to the current scope; if the symbol was
  previously "unresolved" it is removed from the unresolved list
  
  @param name {String} the name of the variabvle being declared
  @param valueName {String} the value to assign to the variable