transient lazy vals in constructor










0















I would like to declare a @transient lazy val as a constructor parameter. Example:



class Foo(@transient lazy val foo: FooFoo).



Scala 2.11 does not yet seem to have support for this. The suggested way in the issue linked above is to declare another lazy val as a class member, and have it point to the call-by-name constructor parameter.



Example (from the issue):



def f[a](lazy t: a) = 
..



should be equivalent to:



def f[a](t': => a) = 
lazy val t: a = t'
..



My question is: Will the second method ensure that the lazy val is correctly initialized upon deserialization on being referenced for the first time?










share|improve this question




























    0















    I would like to declare a @transient lazy val as a constructor parameter. Example:



    class Foo(@transient lazy val foo: FooFoo).



    Scala 2.11 does not yet seem to have support for this. The suggested way in the issue linked above is to declare another lazy val as a class member, and have it point to the call-by-name constructor parameter.



    Example (from the issue):



    def f[a](lazy t: a) = 
    ..



    should be equivalent to:



    def f[a](t': => a) = 
    lazy val t: a = t'
    ..



    My question is: Will the second method ensure that the lazy val is correctly initialized upon deserialization on being referenced for the first time?










    share|improve this question


























      0












      0








      0








      I would like to declare a @transient lazy val as a constructor parameter. Example:



      class Foo(@transient lazy val foo: FooFoo).



      Scala 2.11 does not yet seem to have support for this. The suggested way in the issue linked above is to declare another lazy val as a class member, and have it point to the call-by-name constructor parameter.



      Example (from the issue):



      def f[a](lazy t: a) = 
      ..



      should be equivalent to:



      def f[a](t': => a) = 
      lazy val t: a = t'
      ..



      My question is: Will the second method ensure that the lazy val is correctly initialized upon deserialization on being referenced for the first time?










      share|improve this question
















      I would like to declare a @transient lazy val as a constructor parameter. Example:



      class Foo(@transient lazy val foo: FooFoo).



      Scala 2.11 does not yet seem to have support for this. The suggested way in the issue linked above is to declare another lazy val as a class member, and have it point to the call-by-name constructor parameter.



      Example (from the issue):



      def f[a](lazy t: a) = 
      ..



      should be equivalent to:



      def f[a](t': => a) = 
      lazy val t: a = t'
      ..



      My question is: Will the second method ensure that the lazy val is correctly initialized upon deserialization on being referenced for the first time?







      scala lazy-evaluation






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Nov 14 '18 at 0:42







      lostsoul29

















      asked Nov 14 '18 at 0:35









      lostsoul29lostsoul29

      3451515




      3451515






















          0






          active

          oldest

          votes











          Your Answer






          StackExchange.ifUsing("editor", function ()
          StackExchange.using("externalEditor", function ()
          StackExchange.using("snippets", function ()
          StackExchange.snippets.init();
          );
          );
          , "code-snippets");

          StackExchange.ready(function()
          var channelOptions =
          tags: "".split(" "),
          id: "1"
          ;
          initTagRenderer("".split(" "), "".split(" "), channelOptions);

          StackExchange.using("externalEditor", function()
          // Have to fire editor after snippets, if snippets enabled
          if (StackExchange.settings.snippets.snippetsEnabled)
          StackExchange.using("snippets", function()
          createEditor();
          );

          else
          createEditor();

          );

          function createEditor()
          StackExchange.prepareEditor(
          heartbeatType: 'answer',
          autoActivateHeartbeat: false,
          convertImagesToLinks: true,
          noModals: true,
          showLowRepImageUploadWarning: true,
          reputationToPostImages: 10,
          bindNavPrevention: true,
          postfix: "",
          imageUploader:
          brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
          contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
          allowUrls: true
          ,
          onDemand: true,
          discardSelector: ".discard-answer"
          ,immediatelyShowMarkdownHelp:true
          );



          );













          draft saved

          draft discarded


















          StackExchange.ready(
          function ()
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53291496%2ftransient-lazy-vals-in-constructor%23new-answer', 'question_page');

          );

          Post as a guest















          Required, but never shown

























          0






          active

          oldest

          votes








          0






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes















          draft saved

          draft discarded
















































          Thanks for contributing an answer to Stack Overflow!


          • Please be sure to answer the question. Provide details and share your research!

          But avoid


          • Asking for help, clarification, or responding to other answers.

          • Making statements based on opinion; back them up with references or personal experience.

          To learn more, see our tips on writing great answers.




          draft saved


          draft discarded














          StackExchange.ready(
          function ()
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53291496%2ftransient-lazy-vals-in-constructor%23new-answer', 'question_page');

          );

          Post as a guest















          Required, but never shown





















































          Required, but never shown














          Required, but never shown












          Required, but never shown







          Required, but never shown

































          Required, but never shown














          Required, but never shown












          Required, but never shown







          Required, but never shown







          Popular posts from this blog

          Top Tejano songwriter Luis Silva dead of heart attack at 64

          政党

          天津地下鉄3号線