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View Code? Open in Web Editor NEWCompile-time size optimization for numeric primitives.
Home Page: https://docs.rs/smallnum
License: MIT License
Compile-time size optimization for numeric primitives.
Home Page: https://docs.rs/smallnum
License: MIT License
Would be nice to add a small_float
macro, rounding out (pun intended) numeric primitive support in this library. Unfortunately, determining when a lossless cast from an f64
constant to an f32
equivalent can be done is non-trivial. Due to the specifics of IEEE 754-2008, it’s not as simple as checking (($val as f32) as f64) == ($val as f64)
.
Maybe understanding how std::num::flt2dec
works in supporting Debug
for floats might provide some insight. If precision is not explicitly specified when printing, flt2dec
helps determine the smallest significant precision (not reflected with an ==
comparison). But I’m not sure this methodology is 1) actually the desired solution here or 2) possible to implement in a macro_rules
macro.
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