"smallnum" crate: compile-time size optimization for numeric primitives

• smallnum

  1 7 1.8 Rust

  Compile-time size optimization for numeric primitives.

Thus, this crate provides a macro to automatically determine the smallest integer type that can "fit" a constant max. When the size of a backing collection is known at compile-time (e.g. when using crates like `smallvec` for `!#[no_std]` development), this compile-time optimization can help save precious bytes - potentially for every node in an index-based structure (see README examples). Currently supports signed and unsigned numbers, but I’d love help with floating point support if anyone has ideas (though I don't know what a realistic usecase would be :P).

• deranged

  1 27 6.7 Rust

  Proof of concept ranged integers in Rust.

It looks like all these macros do is return a type and nothing else? Why can't this just be done by hand? I've done something similar for the macro for deranged, but that's for integers with a known and enforced range.

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• rfcs

  666 5,685 9.7 Markdown

  RFCs for changes to Rust

  

Sweet, deranged reminds me of Range Types in the Ada programming language - very cool feature to add to Rust! This RFC might interest you.

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