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CHANGELOG.md

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Changelog

This file contains the changes to the crate since version 0.4.8.

0.10.4 (unreleased)

  • Fixed bug that made it possible to deserialize a Primes that contained non-primes.
    • Made serialization of Primes just serialize the length.
    • Made deserialization of Primes just create a new instance from scratch. This is faster since we then do not have to validate that every single deserialized integer is prime, which we know to be true due to type invariants.
  • Removed the "no_std" keyword from the crate.
  • The serde feature no longer needs the standard library.
  • Added a CI job that checks the crate on targets without a standard library.

0.10.3

  • Added information about MSRV bump when enabling the fast_test feature.
  • Updated dependencies.

0.10.2

  • Re-added the fast_test feature, as the feature issue has been resolved.

0.10.1

  • Removed reference to no longer existing feature from docstring of is_prime.

0.10.0

  • Removed the fast_test feature, as that needed a dependency that has non-additive features.

0.9.11

  • Added back the fast_test feature, but made it do nothing. This fixes any breaking changes from the feature removal, in case someone had time to start using it and runs cargo-update.

The effect of all the yanked versions is that there are no non-additive features anymore, but running cargo update will never break anything, only slow things down.

🗑️ 0.9.10 Yanked because removing a feature is a breaking change

  • Corrected feature information in docs and readme.

🗑️ 0.9.9 Yanked because removing a feature is a breaking change

  • Published a version that doesn't have the fast_test feature to enable downstream users to just run cargo update after versions 0.9.7 and 0.9.8 are yanked.

🗑️ 0.9.8 Yanked because the dependency has non-additive features

  • Made links to crates in the docs on docs.rs link to the docs of those crates on docs.rs.

🗑️ 0.9.7 Yanked because the dependency has non-additive features

  • Added the fast_test feature that makes is_prime call out to the machine-prime crate for a significant speedup.

0.9.6

  • Correct function name in README.

0.9.5

  • Set rust-version to 1.81.0. It is not an MSRV guarantee for the future. It is done because crates.io now auto sets it to the first version on the given edition if you do not set anything. For this crate that would be 1.56.0, which is too old to compile it.

0.9.4

  • Documentation improvements for the macros.

0.9.3

  • Clarified which crate versions have which MSRVs.

0.9.2

  • Corrected docstring of Primes<N>.

0.9.1

  • Corrected docstring of Primes<N>::default.
  • Corrected docstring of Primes<N>::new.

0.9.0

Breaking changes

  • Removed the const_assert feature, its functionality is now always enabled.
  • Removed the std feature, the crate now uses the Error trait from core. The crate is thus always no_std compatible. If the serde feature is enabled the crate uses the serde_arrays crate to serialize the type, and that crate in turn uses the standard library.
  • Replaced the implementations of PartialEq, Eq, PartialOrd, and Ord on Primes with just the default derives. To perform comparisons of the numbers in the struct with arrays or slices you can call as_array or as_slice.
  • Renamed the count_primes_leq function to the more expected name prime_pi

These changes mean that the MSRV of the crate is increased from 1.67.1 to 1.81.0.

Other changes

  • Added the zerocopy feature that derives the IntoBytes trait from the zerocopy crate for the Primes struct.
  • Added the rkyv feature that derives the Serialize, Deserialize, and Archive traits from the rkyv crate for the Primes struct.

0.8.7

  • Sped up is_prime by checking fewer witnesses in the Miller-Rabin test.

0.8.6

  • Fixed a bug where the crate would try to sieve numbers below zero for some inputs to sieve_lt and primes_lt and panic.

0.8.5

  • Added the const_assert feature that promotes all panics that involve only const generics into compile errors.

0.8.4

  • License and docs.rs link improvements in README.
  • Minor documentation improvements.

0.8.3

  • Added the totient function to the Primes struct.
  • Derived Serialize and Deserialize for the error types.
  • Derived Hash for SieveError.

0.8.2

  • Added the serde feature that derives the Serialize and Deserialize traits from serde for the Primes struct.

0.8.1

  • Added a crate feature flag badge to the docs.
  • Mention what can be done with the crate clearer in the description.

0.8.0

Breaking changes

  • Changed Primes<N>::binary_search to have the same API as slice::binary_search.

0.7.4

  • Corrected wrong doclink to remainder in docstring of Primes<N>::prime_factors.

0.7.3

  • Added Primes<N>::prime_factors function that returns an iterator over the prime factors of the given number (and not their multiplicities).

0.7.2

  • Added Primes<N>::prime_factorization function that returns an iterator over the prime factors of the given number and their multiplicities.

0.7.1

  • Organized the examples in the readme and top level crate documentation in a clearer way.

0.7.0

Breaking changes

  • PrimesIter no longer takes a const generic.

0.6.2

  • Minor documentation tweaks.

0.6.1

  • Corrected MSRV to 1.67.1.

0.6.0

Breaking changes

  • Made the Primes<N>::iter function and the IntoIterator implementation for Primes<N> return custom iterator types. Allows less disruptive refactoring in the future.

Other changes

  • Removed panics in functions (like primes) when N is zero. It results in an empty array, but may be what you want.

0.5.1

  • Implemented IntoIterator for &Primes<N>.

0.5.0

This version focuses on adding support for generating primes and sieving numbers in arbitrary ranges, instead of always having to start from 0. It also shortens and clarifies some function names.

Breaking changes

  • Renamed are_prime to sieve.
  • Renamed are_prime_below to sieve_lt.
  • Changed function signature of sieve_lt.
  • Renamed largest_prime_leq to previous_prime.
  • Renamed smallest_prime_lt to next_prime.
  • Renamed prime_counts to count_primes.
  • Removed moebius, as it is out of scope of this crate. If you want the source code for that function it can be found on Rosettacode, or in older versions of this crate.

New features

  • Added primes_geq, primes_lt, and sieve_geq functions to work with arbitrary ranges. They take two const generics, the number of values to return and the size of the sieve used during evaluation.
  • Added primes_segment! and sieve_segment! macros to simplify usage of the above functions. These macros compute the size of the sieve that the above functions need. Due to restrictions on const arithmetic this can not be done inside the functions.
  • Added isqrt function. This can be useful if you wish to compute the size of the sieve yourself.

Minor changes

  • Speed up PRIMES::count_primes_leq by using a binary instead of linear search.
  • Various documentation improvements.