`unfmt`: A compile-time pattern matching library that reverses the interpolation process of `format!`. (github.com)
from testeronious@lemmy.world to rust@programming.dev on 11 Apr 2024 15:52


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myotherself@lemmings.world on 11 Apr 2024 16:00 next collapse

That’s just brilliant.

onlinepersona@programming.dev on 11 Apr 2024 16:20 next collapse

What am I missing? Seems like it just puts the parameter in Some?

Anti Commercial-AI license

Ephera@lemmy.ml on 11 Apr 2024 16:43 collapse

You must’ve read that wrong.

The first example, but formatted differently:

let value = "My name is Rho.";
let result = unformat!("My {} is {}.", value);

Now, result contains:

Some(("name", "Rho"))

…because the words “name” and “Rho” in value happened to be at the position of the {}-slots in the unformat!()-pattern.

onlinepersona@programming.dev on 11 Apr 2024 17:20 collapse

Oh yeah! Thanks. It’s been a long day.

Anti Commercial-AI license

voklen@programming.dev on 11 Apr 2024 23:13 next collapse

I love the concept! I recently wanted something just like this for a Flutter app I was making to parse a filename into a user defined format i.e.

2024-04-12.txt with %Y-%M-%D.txt to {year: 2024, month: 04, day: 12}

I’ll certainty be using this the next time I need anything like that in Rust though.

fhoekstra@programming.dev on 12 Apr 2024 15:49 collapse

Off-topic, but I recognise your name. Thank you for the Daily Diary App! I’m a huge fan, I use it every day for my gratitude routine.

voklen@programming.dev on 13 Apr 2024 18:23 collapse

Wow, I’ve never had anyone recognise my name for something I’ve made! Thank you so much and I’m glad you’re enjoying it 😁

livingcoder@programming.dev on 12 Apr 2024 12:17 next collapse

How does it handle multiple potential outcomes? Example: unformat!(“a {} b {} c”, “a x b b y c”) Would it return Some((“x b”, “y”)) or Some((“x”, “b y”))?

avonarret1@programming.dev on 13 Apr 2024 14:10 collapse

That’s really clever. I want to use it even though I haven’t been Rust‘ing lately