code: function (state, char) {
                  gpf.interfaces.ignoreParameter(state);
                  gpf.interfaces.ignoreParameter(char);
                  gpf.Error.abstract();
                  // return -1;
              }
docs: item evaluation with a character
  
  @param {Object} state Free structure containing current state
  @param {String} char character to test the pattern with
  @return {Number} Matching result, see PatternItem.WRITE_xxx
  @abstract