Function inheritance

tests/webidl/WebIDLParser.js:444–451

()

    };

    var inheritance = function() {
      all_ws();
      if (consume(OTHER, ":")) {
        all_ws();
        var inh = consume(ID) || error("No type in inheritance");
        return inh.value;
      }
    };

    var operation_rest = function(ret, store) {
      all_ws();