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cmuratori's profile
Casey Muratori
Casey Muratori
Casey Muratori
@cmuratori

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Casey Muratori

@cmuratori

I'm worried that the baby thinks people can't change.

Seattle
caseymuratori.com
Joined March 2009

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    1. Chris Eberly‏ @chriseberly Aug 3

      thinking about a programming language feature i really want and realizing that its just goto

      1 reply 0 retweets 3 likes
      Show this thread
    2. Chris Eberly‏ @chriseberly Aug 3

      what if there was a way to skip to a totally different error handling path, why hasn't anyone done this

      1 reply 0 retweets 0 likes
      Show this thread
    3. Steve Canon‏ @stephentyrone Aug 3
      Replying to @chriseberly

      When your logics a dump And you just need to jump That’s a goto!

      1 reply 0 retweets 1 like
    4. Chris Eberly‏ @chriseberly Aug 3
      Replying to @stephentyrone

      goto considered occasionally pretty useful

      1 reply 0 retweets 3 likes
    5. Steve Canon‏ @stephentyrone Aug 3
      Replying to @chriseberly

      Have you read Knuth’s paper in defense of goto?

      1 reply 0 retweets 0 likes
    6. Chris Eberly‏ @chriseberly Aug 3
      Replying to @stephentyrone

      probably at some point, but it's probably worth a re-read since I can't remember. More recently @cmuratori made the (imho) very good point that goto's are just jmpXX instructions and not some alien thing introduced to harm people :)

      2 replies 0 retweets 3 likes
    7. Steve Canon‏ @stephentyrone Aug 3
      Replying to @chriseberly @cmuratori

      The basic problem is that assembly does not have scope, but most languages with goto do, which makes it not “just” a jmp in any meaningful way. That’s a dangerously deceptive argument IMO (and I say that as a long-time assembly programmer).

      1 reply 0 retweets 0 likes
    8. Chris Eberly‏ @chriseberly Aug 3
      Replying to @stephentyrone @cmuratori

      yes i'm heavily paraphrasing casey here, his point was more that programs run by advancing a program counter

      2 replies 0 retweets 0 likes
      Casey Muratori‏ @cmuratori Aug 3
      Replying to @chriseberly @stephentyrone

      The actual point I made was that people need to understand how conditionals and loops translate into machine code (the reverse of what it sounds like you are talking about here). This is especially important given that masks and cmovs are increasingly important.

      10:53 AM - 3 Aug 2021
      • 4 Likes
      • Ivan Braidi opdroid1234 Steve Canon Chris Eberly
      2 replies 0 retweets 4 likes
        1. Chris Eberly‏ @chriseberly Aug 3
          Replying to @cmuratori @stephentyrone

          yes, im sorry for trying to hijack your comments, btw. I realize its one of the more annoying things people do here

          0 replies 0 retweets 0 likes
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        2. Casey Muratori‏ @cmuratori Aug 3
          Replying to @cmuratori @chriseberly @stephentyrone

          I recommend everyone write a program at least once that does every construct with gotos only (if, else, while, do, do-while, switch). I think it's critical that people understand what the CPU actually is doing here, because most people today do not.

          1 reply 0 retweets 4 likes
        3. Casey Muratori‏ @cmuratori Aug 3
          Replying to @cmuratori @chriseberly @stephentyrone

          I don't, however, find gotos particularly useful in practice once you have gained the knowledge of how CPU jumps work. Furthermore, CPU jumps require some additional education, such as what macro-op fusion is and why you should make sure the loops you write can use it.

          1 reply 0 retweets 4 likes
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