proc-macro-workshop
case-studies
proc-macro-workshop | case-studies | |
---|---|---|
26 | 11 | |
3,836 | 1,603 | |
- | - | |
4.3 | 3.8 | |
26 days ago | about 1 month ago | |
Rust | Rust | |
Apache License 2.0 | Apache License 2.0 |
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proc-macro-workshop
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Why does the core not provide a "New" derive attribute?
Tangentially, the proc macro workshop walks through building a derive macro implementing a builder pattern. From experience, I can tell I couldn't ever write proc macros just by reading the manual, going through it is really helpful https://github.com/dtolnay/proc-macro-workshop/blob/master/README.md
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Help on spans for proc macros
I am working on the proc macro workshop and am a little stuck on the builder portion of the workshop. Step 08-unrecognized-attributes wants you to handle the car where the field modifier has a misspelled portion (eac instead of each)
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Practical Procedural Macros in Rust
I would very much second the suggestion to do David Tolnay’s Proc Macro Workshop if you want to start understanding how to write them. I’d been writing Rust for years but always kind of avoided proc macros.
When I had a need for them, I went through only the first section of the workshop and everything clicked. You can just do the derive macro section and all the strange and scary-looking macro syntax will make sense. I realized that there is only a bit of extra syntax but it’s used very often so it can seem a little overwhelming when reading macro code.
https://github.com/dtolnay/proc-macro-workshop
- Rust fact vs. fiction: 5 Insights from Google's Rust journey in 2022
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A walkthough on how to write derive procedural macros
Another good one imo is the proc-macro-workshop.
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Transitioning to Rust as a company
Don't be afraid of proc macros and derive macros, they rule. Study the basic examples. Crates like darling and resources like David Tolnay's workshop will help. Write derives for your simpler traits and impress your colleagues.
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What are your experiences with hack-and-learn events?
Regarding 4, I think that macros are an interesting intermediate/advanced topic. I personally loved the material from https://github.com/dtolnay/proc-macro-workshop
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Procedural Macros are really hard to understand
It took me a while to get anything done. My mistake : I came accross the procedural macros workshop several times, and every time I dismissed it, thinking - meh I'll just hack together exactly what I need and move on. Then finally I figured there is no way around it. The builder exercise sounds boring but it covers the topic pretty well. And then I went on to the debug one and from there was able to build the proc macro I wanted.
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MacroKata is really good!
Hey! While researching, I found this: https://github.com/dtolnay/proc-macro-workshop
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Anything C can do Rust can do Better
Rust Latam: procedural macros workshop - David Tolnay
case-studies
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::lending-iterator — Lending/streaming Iterators on Stable Rust (and a pinch of HKT)
Luckily there is a workaround to emulate such a definition, which dtolnay discovered and explained here: https://github.com/dtolnay/case-studies/tree/b9802f6df8dc8e54970b83fb9af6df923b46abf5/unit-type-parameters.
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Hey Rustaceans! Got a question? Ask here! (17/2022)!
I think they are talking about this one trick which the devs don't want you to know about. Note that while it looks like specialization, it works only in a few very limited cases and is quite fragile, so it's a hack, not a substitute for the real feature.
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Any good resources for learning Rust macros?
Also I suggest his case studies repo since you are looking at what is possible: https://github.com/dtolnay/case-studies
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What are some creative/advanced uses of macro_rules?
/u/dtolnay has a great case studies repository.
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Hey Rustaceans! Got an easy question? Ask here (29/2021)!
Once you have the basics down, read dtolnay's case studies. They show how to do advanced stuff with easy macros.
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println use `Debug` if argument is not `Display`
If you were writing your own println macro, you might be able to get away with this kind of hack: https://github.com/dtolnay/case-studies/blob/master/autoref-specialization/README.md
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Hey Rustaceans! Got an easy question? Ask here (11/2021)!
You can use "Autoref-based stable specialization" or use/mimic the impls crate.
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Why I gave up on Rust (for now)
With a subset of specialization likely riding the trains soon and a workaround available, why would you give up?
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Hey Rustaceans! Got an easy question? Ask here (10/2021)!
this works since values and types are in different namespaces (see: Rusts Universes or dtolnay's Case Study about "Unit struct with type parameters")
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Hey Rustaceans! Got an easy question? Ask here (53/2020)!
To do this with traits you would need specialization but since you are using macros you should be able to use "Autoref-based stable specialization". Here is a playground which uses the latter approach to implement the wanted macro without using any nightly features.
What are some alternatives?
sccache - Sccache is a ccache-like tool. It is used as a compiler wrapper and avoids compilation when possible. Sccache has the capability to utilize caching in remote storage environments, including various cloud storage options, or alternatively, in local storage.
rocket-auth-login - Authentication and login processing for Rust's Rocket web framework. Demonstrates a working example of how to authenticate users and process login as well as how to handle logging out.
cargo-expand - Subcommand to show result of macro expansion
xargo - The sysroot manager that lets you build and customize `std`
rust-learnings - Collection of Rust learnings through implementation
proc-macro-crate - `$crate` in procedural macros.
style - css for rust
mini-redis - Incomplete Redis client and server implementation using Tokio - for learning purposes only
quote - Rust quasi-quoting
parquet2 - Fastest and safest Rust implementation of parquet. `unsafe` free. Integration-tested against pyarrow
style - Style Dart Backend Framework