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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. Casey Muratori‏ @cmuratori 19 Feb 2016
      Replying to @nothings

      @nothings @jwatte @thorduragust Yes, I feel like people are conflating the _semantic_ difference with the _practical_ difference.

      1 reply 0 retweets 0 likes
    2. Casey Muratori‏ @cmuratori 19 Feb 2016
      Replying to @cmuratori

      @cmuratori @nothings @jwatte @thorduragust There is only a _semantic_ difference as far as I know - the actual codegen does not change.

      4 replies 0 retweets 0 likes
    3. Spooky Killer Robot‏ @jwatte 19 Feb 2016
      Replying to @cmuratori

      @cmuratori @nothings @thorduragust Turns out, if you follow the intended semantics, the programming language helps you.

      1 reply 0 retweets 0 likes
    4. Casey Muratori‏ @cmuratori 19 Feb 2016
      Replying to @jwatte

      @jwatte @nothings @thorduragust No it doesn't? Either you had a pointer at some point, which means you *'d it to turn it into a reference,

      1 reply 0 retweets 1 like
    5. Casey Muratori‏ @cmuratori 19 Feb 2016
      Replying to @cmuratori

      @cmuratori @jwatte @nothings @thorduragust or you didn't, and so you couldn't have had the bug. It's the same risk as pointers either way?

      1 reply 0 retweets 2 likes
    6. Casey Muratori‏ @cmuratori 19 Feb 2016
      Replying to @cmuratori

      @cmuratori @jwatte @nothings @thorduragust I've never understood the (specious, in my opinion) claim that references help here.

      4 replies 0 retweets 2 likes
    7. Ian Henderson‏ @ianh_ 19 Feb 2016
      Replying to @cmuratori

      @cmuratori @jwatte @nothings @thorduragust references prevent NULL pointers about as well as const prevents mutation.

      5 replies 1 retweet 9 likes
    8. Antoine Leblanc‏ @nicuveo 19 Feb 2016
      Replying to @ianh_

      @ianh_ @cmuratori @jwatte @nothings @thorduragust But don't both trigger some compiler optimisations based on those assumptions?

      1 reply 0 retweets 0 likes
    9. ES‏ @ezystory 19 Feb 2016
      Replying to @nicuveo

      @nicuveo @ianh_ @cmuratori @jwatte @nothings @thorduragust almost never, because the compiler unaware of the true origin of the c-p or ref.

      1 reply 0 retweets 0 likes
    10. ES‏ @ezystory 19 Feb 2016
      Replying to @ezystory

      @nicuveo @ianh_ @cmuratori @jwatte @nothings @thorduragust e.g. Rust does this right, because it tracks lifetimes of ptr kinds.

      1 reply 0 retweets 0 likes
      Casey Muratori‏ @cmuratori 19 Feb 2016
      Replying to @ezystory

      @ezystory @nicuveo @ianh_ @jwatte @nothings @thorduragust Yes, you can thank the C++ spec for making const nearly useless to the optimizer.

      6:27 PM - 19 Feb 2016
      • 1 Like
      • Tom Forsyth
      1 reply 0 retweets 1 like
        1. New conversation
        2. Casey Muratori‏ @cmuratori 19 Feb 2016
          Replying to @cmuratori

          @cmuratori @ezystory @nicuveo @ianh_ @jwatte @nothings @thorduragust It is almost entirely a semantic construct as well.

          1 reply 0 retweets 0 likes
        3. ES‏ @ezystory 19 Feb 2016
          Replying to @cmuratori

          @cmuratori @nicuveo @ianh_ @jwatte @nothings @thorduragust Rust is giving llvm alias/mut constraints that C.. can't see. :-)

          0 replies 0 retweets 0 likes
        4. End of conversation

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