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pcwalton's profile
Patrick Walton
Patrick Walton
Patrick Walton
@pcwalton

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Patrick Walton

@pcwalton

Research engineer at Mozilla

San Francisco, CA
pcwalton.github.io
Joined November 2009

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    Patrick Walton‏ @pcwalton 3 Sep 2019
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    Hot take: Exceptions are a fine error-handling mechanism.

    2:38 PM - 3 Sep 2019
    • 11 Retweets
    • 141 Likes
    • Serial Experiments Sam eatsfoobars Nick Gordon simple complex Lie algebra Luka Jacobowitz 🏳️‍🌈 Joe Kachmar 🏳️‍🌈 ARnikev Mykhailo Kulak Sjur
    17 replies 11 retweets 141 likes
      1. New conversation
      2. whitequark‏ @whitequark 3 Sep 2019
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        Replying to @pcwalton

        I don't think an error-handling mechanism can be said to be "fine" or not without consideration of a specific implementation and domain. For example, I'm using zero-cost EH in a hard real-time system and it turns out people actually want the exceptional path to be fast and…

        1 reply 0 retweets 13 likes
      3. whitequark‏ @whitequark 3 Sep 2019
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        Replying to @whitequark @pcwalton

        not merely predictable, which throws quite a wrench in the works. (My alternatives at the time included "SjLj" and "CPS" and did not include "no EH" so I think it was the right choice at the moment, but it's still pretty painful.)

        1 reply 0 retweets 6 likes
      4. 8 more replies
      1. New conversation
      2. iximeow‏ @iximeow 3 Sep 2019
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        Replying to @pcwalton

        doubly hot take: checked exceptions are very good

        4 replies 0 retweets 21 likes
      3. Patrick Walton‏ @pcwalton 3 Sep 2019
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        Replying to @iximeow

        Yup, I’m OK with checked exceptions.

        1 reply 0 retweets 7 likes
      4. 2 more replies
      1. New conversation
      2. HK, Kashmir, Palestine‏ @bagatela_8zu 3 Sep 2019
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        Replying to @pcwalton

        If only they are marked more strictly by the compiler

        1 reply 0 retweets 1 like
      3. Patrick Walton‏ @pcwalton 3 Sep 2019
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        Replying to @bagatela_8zu

        Yeah, I’m fine with either checked or unchecked exceptions, depending on how strict you like your error handling to be.

        1 reply 0 retweets 3 likes
      4. 2 more replies
      1. New conversation
      2. eddyb, thriving in isolation,‏ @eddyb_r 3 Sep 2019
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        Replying to @pcwalton

        hot take for the cold path

        1 reply 0 retweets 26 likes
      3. iximeow‏ @iximeow 3 Sep 2019
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        Replying to @eddyb_r @pcwalton

        i have contemplated some nightmarish "catch_panic" shenanigans specifically because i have failure modes i want to handle, but they're in hot enough code that Result'ing everything is substantially detrimental :(

        2 replies 0 retweets 2 likes
      4. 9 more replies
      1. New conversation
      2. C�cile Tonglet  🦀‏ @CecileTonglet 3 Sep 2019
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        Replying to @pcwalton

        Agree. It's exceptions as control flow that is not fine. When I started #rustlang it forced my brain to think about when to use panics, unwrap, except, Result and Option. I did give a big thought about it and all of a sudden I felt in control of what I was doing.

        1 reply 0 retweets 10 likes
      3. Luca Fornili‏ @lfornili 4 Sep 2019
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        Replying to @CecileTonglet @pcwalton

        I felt the same. And this new habit somewhat translated to Java and c# for me.

        0 replies 0 retweets 1 like
      4. End of conversation

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