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  3. Look what I found

Look what I found

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  • System FaultE System Fault

    Look what I found

    Here: http://pigeonsnest.co.uk/stuff/pigeons-device.html

    mage_of_dragonsM This user is from outside of this forum
    mage_of_dragonsM This user is from outside of this forum
    mage_of_dragons
    wrote last edited by
    #16

    @error this should be classified as an infohazard

    1 Reply Last reply
    0
    • System FaultE System Fault

      Look what I found

      Here: http://pigeonsnest.co.uk/stuff/pigeons-device.html

      Ype KingmaK This user is from outside of this forum
      Ype KingmaK This user is from outside of this forum
      Ype Kingma
      wrote last edited by
      #17

      @error

      Three lines too many. I thought serious programmers were lazy.

      SteveF 1 Reply Last reply
      0
      • System FaultE System Fault

        Look what I found

        Here: http://pigeonsnest.co.uk/stuff/pigeons-device.html

        The Penguin of EvilE This user is from outside of this forum
        The Penguin of EvilE This user is from outside of this forum
        The Penguin of Evil
        wrote last edited by
        #18

        @error It's an utter pain in the arse when writing a compiler too, and even worse is when goto gets involved.

        1 Reply Last reply
        0
        • MichaelM Michael

          @error that's wild. I wonder how this would be treated by different formatters/style enforcers and if it would break

          System FaultE This user is from outside of this forum
          System FaultE This user is from outside of this forum
          System Fault
          wrote last edited by
          #19

          @mikee I actually tried it. It works just fine to my surprise. But the clangd formatter gone mad:

          MichaelM h3mmy :v_enby:H 2 Replies Last reply
          0
          • System FaultE System Fault

            @_the_cloud Yeah, but if you click the link, they actually use default case there.

            poleguy looking for lost toolsP This user is from outside of this forum
            poleguy looking for lost toolsP This user is from outside of this forum
            poleguy looking for lost tools
            wrote last edited by
            #20

            @error @_the_cloud Only in the original example, not in the first two. I'd set it to 3 and chuckle too. I'm an FPGA guy, so I always think about else/default.

            1 Reply Last reply
            0
            • System FaultE System Fault

              Look what I found

              Here: http://pigeonsnest.co.uk/stuff/pigeons-device.html

              poleguy looking for lost toolsP This user is from outside of this forum
              poleguy looking for lost toolsP This user is from outside of this forum
              poleguy looking for lost tools
              wrote last edited by
              #21

              @error gloop, arfle, barfle says it all.

              1 Reply Last reply
              0
              • System FaultE System Fault

                @mikee I actually tried it. It works just fine to my surprise. But the clangd formatter gone mad:

                MichaelM This user is from outside of this forum
                MichaelM This user is from outside of this forum
                Michael
                wrote last edited by
                #22

                @error ha! Thanks for testing!

                1 Reply Last reply
                0
                • System FaultE System Fault

                  Look what I found

                  Here: http://pigeonsnest.co.uk/stuff/pigeons-device.html

                  Scott :mbta_glx:S This user is from outside of this forum
                  Scott :mbta_glx:S This user is from outside of this forum
                  Scott :mbta_glx:
                  wrote last edited by
                  #23

                  @error it's beautiful

                  1 Reply Last reply
                  0
                  • System FaultE System Fault

                    Look what I found

                    Here: http://pigeonsnest.co.uk/stuff/pigeons-device.html

                    Malcolm HerbertM This user is from outside of this forum
                    Malcolm HerbertM This user is from outside of this forum
                    Malcolm Herbert
                    wrote last edited by
                    #24

                    @error reminds me of Duff's Device for abitrary length byte copy using the switch as an index into an architecture-appropriate unrolled loop https://en.wikipedia.org/wiki/Duff%27s_device

                    1 Reply Last reply
                    0
                    • Vaporeon :vaporeon:V Vaporeon :vaporeon:

                      @error That's super neat, I didn't know! I'll probably use this in my code at a some point...

                      System FaultE This user is from outside of this forum
                      System FaultE This user is from outside of this forum
                      System Fault
                      wrote last edited by
                      #25

                      @vaporeon_ please don't 😃

                      1 Reply Last reply
                      0
                      • System FaultE System Fault

                        Look what I found

                        Here: http://pigeonsnest.co.uk/stuff/pigeons-device.html

                        Western InfidelsW This user is from outside of this forum
                        Western InfidelsW This user is from outside of this forum
                        Western Infidels
                        wrote last edited by
                        #26

                        @error I don't think I ever would have tried to pass that off, myself, but I sort of admire the fact that, even though it's language abuse, it produces a predictable outcome. C has a lot of undefined behavior, but somehow, this isn't.

                        I think I tried to use Duff's Device in a project once, but my colleagues objected and made me change it. Or maybe I just explained Duff's Device to them and they were horrified. Like, "I don't know if I can trust that guy anymore" horrified. It was a long time ago.

                        This is interesting but it's not really saving a ton of time or code space. I think Duff's Device is probably more defensible.

                        System FaultE 1 Reply Last reply
                        0
                        • System FaultE System Fault

                          Look what I found

                          Here: http://pigeonsnest.co.uk/stuff/pigeons-device.html

                          ewhacE This user is from outside of this forum
                          ewhacE This user is from outside of this forum
                          ewhac
                          wrote last edited by
                          #27

                          @error @TomDuff, call your office...

                          Tom DuffT 1 Reply Last reply
                          0
                          • mmu_manM mmu_man

                            @error yup that's how Contiki implemented Protothreads initially:

                            https://dunkels.com/adam/pt/

                            ewhacE This user is from outside of this forum
                            ewhacE This user is from outside of this forum
                            ewhac
                            wrote last edited by
                            #28

                            @mmu_man @error Never heard of these before; thank you!

                            1 Reply Last reply
                            0
                            • Western InfidelsW Western Infidels

                              @error I don't think I ever would have tried to pass that off, myself, but I sort of admire the fact that, even though it's language abuse, it produces a predictable outcome. C has a lot of undefined behavior, but somehow, this isn't.

                              I think I tried to use Duff's Device in a project once, but my colleagues objected and made me change it. Or maybe I just explained Duff's Device to them and they were horrified. Like, "I don't know if I can trust that guy anymore" horrified. It was a long time ago.

                              This is interesting but it's not really saving a ton of time or code space. I think Duff's Device is probably more defensible.

                              System FaultE This user is from outside of this forum
                              System FaultE This user is from outside of this forum
                              System Fault
                              wrote last edited by
                              #29

                              @WesternInfidels It produces warning, so I personally won't use it. But it looks beautiful

                              1 Reply Last reply
                              0
                              • System FaultE System Fault

                                Look what I found

                                Here: http://pigeonsnest.co.uk/stuff/pigeons-device.html

                                elle mundyE This user is from outside of this forum
                                elle mundyE This user is from outside of this forum
                                elle mundy
                                wrote last edited by
                                #30

                                @error reminds me of duff’s device https://en.wikipedia.org/wiki/Duff%27s_device

                                1 Reply Last reply
                                0
                                • ewhacE ewhac

                                  @error @TomDuff, call your office...

                                  Tom DuffT This user is from outside of this forum
                                  Tom DuffT This user is from outside of this forum
                                  Tom Duff
                                  wrote last edited by
                                  #31

                                  @ewhac @error Insane. No one in his right mind calls functions arfle and barfle.

                                  1 Reply Last reply
                                  0
                                  • System FaultE System Fault

                                    Look what I found

                                    Here: http://pigeonsnest.co.uk/stuff/pigeons-device.html

                                    Kelly SchultzS This user is from outside of this forum
                                    Kelly SchultzS This user is from outside of this forum
                                    Kelly Schultz
                                    wrote last edited by
                                    #32

                                    @error time to see who at my workplace I can aggravate the most

                                    1 Reply Last reply
                                    0
                                    • System FaultE System Fault

                                      Look what I found

                                      Here: http://pigeonsnest.co.uk/stuff/pigeons-device.html

                                      wyattW This user is from outside of this forum
                                      wyattW This user is from outside of this forum
                                      wyatt
                                      wrote last edited by
                                      #33
                                      @error yes
                                      1 Reply Last reply
                                      0
                                      • System FaultE System Fault

                                        Look what I found

                                        Here: http://pigeonsnest.co.uk/stuff/pigeons-device.html

                                        wyattW This user is from outside of this forum
                                        wyattW This user is from outside of this forum
                                        wyatt
                                        wrote last edited by
                                        #34
                                        @error this is devious and i love it
                                        1 Reply Last reply
                                        0
                                        • System FaultE System Fault

                                          Look what I found

                                          Here: http://pigeonsnest.co.uk/stuff/pigeons-device.html

                                          koorogiK This user is from outside of this forum
                                          koorogiK This user is from outside of this forum
                                          koorogi
                                          wrote last edited by
                                          #35

                                          @error musl does this in its printf implementation: https://git.musl-libc.org/cgit/musl/tree/src/stdio/vfprintf.c#n597

                                          System FaultE 1 Reply Last reply
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