Rust 1.46 significantly extends const fn support, so now it's possible to perform all calculations at compile time (and hence invoke crc in const context). This PR makes all funcs const (with the only exception Digest.update, which mutates state and not yet available in stable).
Changes look good. Btw, a couple of const fns in src/table.rs and src/util.rs can be simplified quite a bit in Rust 1.46. In terms of release plan, I think it's reasonable to bump MSRV to 1.46 for v2. Might be worth adding fuzz testing before the actual 2.0.0 release.
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.