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yoshuawuyts's profile
yosh
yosh
yosh
@yoshuawuyts

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yosh

@yoshuawuyts

Software researcher. he/they

Berlin, UTC+2
blog.yoshuawuyts.com
Joined May 2009

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    1. yosh‏ @yoshuawuyts 8 Dec 2019
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      Published "omnom" 2.0.0 Byte methods are now a bit more convenient; added fill_ variants of the byte methods as well. Read numbers as little/big-endian multiple times over! :D https://docs.rs/omnom/2.0.0/omnom/ …pic.twitter.com/leEy8og1ff

      use std::io::{Cursor, Seek, SeekFrom};
use omnom::prelude::*;

let mut buf = Cursor::new(vec![0; 15]);

// Write a u16 as little-endian.
let num = 12_u16;
buf.write_le(num).unwrap();

// Reset cursor back to start of buffer
buf.seek(SeekFrom::Start(0)).unwrap();

// Read a u16 as little-endian.
let num: u16 = buf.fill_le().unwrap();
assert_eq!(num, 12);

// Explicitely move cursor forward.
buf.consume(2);
      3 replies 2 retweets 12 likes
    2. dignifiedquire‏ @dignifiedquire 8 Dec 2019
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      Replying to @yoshuawuyts

      have you tried writing reusable combinators with it yet? that is a big part how nom makes me productive when writing parsers

      1 reply 0 retweets 0 likes
    3. yosh‏ @yoshuawuyts 8 Dec 2019
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      Replying to @dignifiedquire

      I've never written or used a parser combinator before. Would love to know how it works out. Intuitively I would imagine using regex + thiserror + omnom would mostly provide the same functionality with equal-ish brevity?

      2 replies 0 retweets 0 likes
    4. yosh‏ @yoshuawuyts 8 Dec 2019
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      Replying to @yoshuawuyts @dignifiedquire

      Basing this on having written a mime parser with omnom:https://github.com/yoshuawuyts/omnom/blob/master/examples/mime.rs …

      2 replies 0 retweets 0 likes
    5. dignifiedquire‏ @dignifiedquire 8 Dec 2019
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      Replying to @yoshuawuyts

      the other is, how can I parse from a String/Vec without allocating? the current api seems to force allocations

      1 reply 0 retweets 1 like
    6. yosh‏ @yoshuawuyts 8 Dec 2019
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      Replying to @dignifiedquire

      That's a great q. So you don't have to allocate in most cases I think. Just need somewhere to read bytes into, but that can be reused. Could even only do parsing to find offsets and then use that as a backing store for values. More of a pattern tho.

      1 reply 0 retweets 0 likes
    7. dignifiedquire‏ @dignifiedquire 8 Dec 2019
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      Replying to @yoshuawuyts

      right, with the skip variants you could do that, I guess that means you should probably add skip_until :)

      1 reply 0 retweets 1 like
      yosh‏ @yoshuawuyts 8 Dec 2019
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      Replying to @dignifiedquire

      Oh yeah we should!

      4:20 AM - 8 Dec 2019 from Chuo-ku, Tokyo
      1 reply 0 retweets 0 likes
        1. New conversation
        2. dignifiedquire‏ @dignifiedquire 8 Dec 2019
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          Replying to @yoshuawuyts

          trying to write a semver parser using it now, lets see how that goes

          1 reply 0 retweets 1 like
        3. yosh‏ @yoshuawuyts 8 Dec 2019
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          Replying to @dignifiedquire

          skip_until: https://docs.rs/omnom/2.1.0/omnom/trait.BufReadExt.html#method.skip_until …

          1 reply 0 retweets 0 likes
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