pfr
miniserde
pfr | miniserde | |
---|---|---|
4 | 4 | |
1,263 | 724 | |
1.0% | - | |
7.9 | 7.7 | |
17 days ago | 13 days ago | |
C++ | Rust | |
Boost Software License 1.0 | Apache License 2.0 |
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pfr
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Rooting for P1061 "Structured Bindings can introduce a Pack"
This single feature opens a world of new possiblities. For example, it makes implementing "getting the number of fields" trivial. Furthrmore, and much more importantly, it enables turning a struct into a tuple. Currently, this can only be done by enumerating cases (therefore it's not fully generic), as with Boost PFR. By the way, PFR greatly simplifies our codebases, especially for parts with serialization and/or reflection.
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Minimum viable declarative GUI in C++
The code is relatively short and can be groked with a few coffees: https://github.com/boostorg/pfr/tree/develop/include/boost/pfr ; if you're using C++17 it uses a binary search (https://github.com/boostorg/pfr/blob/develop/include/boost/pfr/detail/fields_count.hpp) to count the number of fields in a struct, by starting by the observation that a likely majorant on the number of fields in a struct is sizeof(the struct) * CHAR_BIT, assuming not too many [[no_unique_address]] tomfooleries. Then once this count is known it's possible to simply map them as a tuple through sheer brute force and destructuring: https://github.com/boostorg/pfr/blob/develop/include/boost/pfr/detail/core17_generated.hpp
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The Serde Rust Framework
I wonder if the c++ approach of boost.pfr would be portable to rust ? It allows reflection on aggregates without needing to annotate anything: https://github.com/boostorg/pfr
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Counting the number of fields in an aggregate in C++20
It is an 'interesting' meta-programming problem though (wasted many weeks on it myself, fixed a small gcc bug - a 'uniform init' edge case and filed an issue with magic_get Reflecting array members of aggregate structs).
miniserde
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Hey Rustaceans! Got a question? Ask here (8/2023)!
It's pretty common to avoid macros as they can seem too magical a lot of the time. And with traits, there's experiments like miniserde which specifically avoid monomorphization overhead. I also see people who want to avoid having lots of dependencies relatively often.
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venial 0.1 - A lightweight alternative to syn
Right now, the next step would be to try to reimplement miniserde with venial, and publish benchmarks.
- Rust takes a major step forward as Linux's second official language
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The Serde Rust Framework
The only downside is compile time bloat.
Serde generates heaps and heaps of generic code. This gets optimized away to be very efficient, but it can be quite cumbersome.
Ever tried working on a crate with hundreds or thousands of de/serializable types? Compile times shoot through the roof really quickly.
The maintainer of serde also created `miniserde` [1], which uses dynamic dispatch and can have 4x compile time improvements.
Due to Rusts lack of orphan instances you really depend on a pervasive standard for serializiation which is used by all libraries, so the ecosystem is really locked in to serde by now.
[1] https://github.com/dtolnay/miniserde
What are some alternatives?
Magic Enum C++ - Static reflection for enums (to string, from string, iteration) for modern C++, work with any enum type without any macro or boilerplate code
nanoserde - Serialisation library with zero dependencies
magic_get - std::tuple like methods for user defined types without any macro or boilerplate code
ComLightInterop - Cross-platform COM interop library for .NET Core 2.1 or newer
MLV-App - All in one MLV processing app.
serde_v8 - Moved to https://github.com/denoland/deno
serde - Serialization framework for Rust
create-rust-app - Set up a modern rust+react web app by running one command.
sapio - A Bitcoin Programming Language
EU4ConsolePatcher - A simple memory patcher which enables the internal developer console in ironman mode
rust-by-example - Learn Rust with examples (Live code editor included)