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enum-map
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(Tip of my fingers) Library with a macro to create an enum from a range
I know I could write (and have written) this enum myself by hand. I don't want to use a newtype around u8 or something like that because I want the static guarantees of an enum — plus I'm using EnumMap to create statically-allocated maps with enum keys, so I'm hoping whatever this library was will play nicely with it.
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Is std::collections::HashMap optimized for enums?
What you might want is enum-map instead.
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What's your favourite under-rated Rust crate and why?
enum_map is great for dense maps where the keys are the variants of a discriminant-only enum.
schemafy
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ts-rs - generate typescript type declarations from rust types
then use https://github.com/Marwes/schemafy to go json schema -> Rust
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Whats your favourite open source Rust project that needs more recognition?
Schemafy.
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What's your favourite under-rated Rust crate and why?
Going the other way is also possible using schemafy but I never needed that so far.
What are some alternatives?
strum - A small rust library for adding custom derives to enums
typebinder - Exports TS definitions from Rust module
parse-size - Parse byte size into integer accurately.
sonyflake-rs - 🃏 A distributed unique ID generator inspired by Twitter's Snowflake.
structopt - Parse command line arguments by defining a struct.
concread - Concurrently Readable Data Structures for Rust
serde-plain - A serde serializer that serializes a subset of types into plain strings
actix-web-static-files - actix-web static files as resources support
linkme - Safe cross-platform linker shenanigans
NumToA - An efficient method of heaplessly converting numbers into their string representations, storing the representation within a reusable byte array.
phpass - PHPass, the WordPress password hasher, re-implemented in rust