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edwinbrady's profile
Edwin Brady
Edwin Brady
Edwin Brady
@edwinbrady

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Edwin Brady

@edwinbrady

CompSci Lecturer. Go player. Programming language researcher. Idris hacker. Denies knowledge of Whitespace. He/him. http://tinyurl.com/TypeDD 

St Andrews
eb.host.cs.st-andrews.ac.uk
Joined November 2008

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    Edwin Brady‏ @edwinbrady 22 Nov 2018
    • Report Tweet
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    I didn't expect this to work. Plenty still to do here, and it's not quite the type I'd want, but linear types really are quite fun...pic.twitter.com/nNe3RZ0H5t

    2:16 PM - 22 Nov 2018
    • 48 Retweets
    • 154 Likes
    • NickFP Anton_Rich Stijn Baert Виталий Брагилевский Mohamad Fob dann ad_rood James Bradbury Tomas Mikula
    5 replies 48 retweets 154 likes
      1. New conversation
      2. Louis‏ @louispilfold 22 Nov 2018
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        Replying to @edwinbrady

        What type would you like?

        1 reply 0 retweets 0 likes
      3. Edwin Brady‏ @edwinbrady 22 Nov 2018
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        Replying to @louispilfold

        The main annoyance is that 'f' requires its argument to be linear, which is too restrictive. But without that, it can't find the definition. Yet :).

        2 replies 0 retweets 4 likes
      4. 3 more replies
      1. New conversation
      2. ᛚᛖᛁᚠ Warner‏ @pdxleif 22 Nov 2018
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        Replying to @edwinbrady @milessabin

        Should that be a default heuristic - try to use the input? I know exference does this, and maybe others...

        1 reply 0 retweets 1 like
      3. Edwin Brady‏ @edwinbrady 23 Nov 2018
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        Replying to @pdxleif @milessabin

        Using something at most once might be useful. Though you don't always want that, especially on an expression search in a bigger context.

        0 replies 0 retweets 0 likes
      4. End of conversation
      1. New conversation
      2. Rémy Rakić‏ @lqd 23 Nov 2018
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        Replying to @edwinbrady

        is synthesis one of the possible end goals here ? This feels like an Idris version of ReSyn + Synquid would conceptually fit really well

        1 reply 0 retweets 0 likes
      3. Edwin Brady‏ @edwinbrady 23 Nov 2018
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        Replying to @lqd

        Some kind of domain-specific synthesis might be very nice. At the minute, it's really just a brute force search to see what fits the type, but linearity annotations turn out to allow you to reduce the space quite a bit.

        0 replies 0 retweets 1 like
      4. End of conversation
      1. New conversation
      2. Francois Armand‏ @fanf42 22 Nov 2018
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        Replying to @edwinbrady

        what is the meaning of the '1'? (I guess it's something to do with linearity, but that's just guessing). Pointer towards resources are fine :)

        1 reply 0 retweets 1 like
      3. Edwin Brady‏ @edwinbrady 23 Nov 2018
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        Replying to @fanf42

        It means the function has to use that argument exactly once. So given "f : (1 x : a) -> b", then if "f x" is used exactly once, it means "x" is used exactly once.

        2 replies 0 retweets 6 likes
      4. 1 more reply
      1. Nic 🏡λas‏ @BeRewt 22 Nov 2018
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        Replying to @edwinbrady @milessabin

        😮

        0 replies 0 retweets 1 like
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