RELEASES.md

Release 0.2.0 (2018-05-25)

Enhancements

• BigInt and BigUint now implement Product and Sum for iterators of any item that we can Mul and Add, respectively. For example, a factorial can now be simply: let f: BigUint = (1u32..1000).product();
• BigInt now supports two's-complement logic operations, namely BitAnd, BitOr, BitXor, and Not. These act conceptually as if each number had an infinite prefix of 0 or 1 bits for positive or negative.
• BigInt now supports assignment operators like AddAssign.
• BigInt and BigUint now support conversions with i128 and u128, if sufficient compiler support is detected.
• BigInt and BigUint now implement rand's SampleUniform trait, and a custom RandomBits distribution samples by bit size.
• The release also includes other miscellaneous improvements to performance.

Breaking Changes

• num-bigint now requires rustc 1.15 or greater.
• The crate now has a std feature, and won't build without it. This is in preparation for someday supporting #![no_std] with alloc.
• The serde dependency has been updated to 1.0, still disabled by default. The rustc-serialize crate is no longer supported by num-bigint.
• The rand dependency has been updated to 0.5, now disabled by default. This requires rustc 1.22 or greater for rand's own requirement.
• Shr for BigInt now rounds down rather than toward zero, matching the behavior of the primitive integers for negative values.
• ParseBigIntError is now an opaque type.
• The big_digit module is no longer public, nor are the BigDigit and DoubleBigDigit types and ZERO_BIG_DIGIT constant that were re-exported in the crate root. Public APIs which deal in digits, like BigUint::from_slice, will now always be base-u32.

Contributors: @clarcharr, @cuviper, @dodomorandi, @tiehuis, @tspiteri

Release 0.1.44 (2018-05-14)

• Division with single-digit divisors is now much faster.
• The README now compares ramp, rug, rust-gmp, and apint.

Contributors: @cuviper, @Robbepop

Release 0.1.43 (2018-02-08)

• The new BigInt::modpow performs signed modular exponentiation, using the existing BigUint::modpow and rounding negatives similar to mod_floor.

Contributors: @cuviper

Release 0.1.42 (2018-02-07)

• num-bigint now has its own source repository at rust-num/num-bigint.
• lcm now avoids creating a large intermediate product.
• gcd now uses Stein's algorithm with faster shifts instead of division.
• rand support is now extended to 0.4 (while still allowing 0.3).

Contributors: @cuviper, @Emerentius, @ignatenkobrain, @mhogrefe

Prior releases

No prior release notes were kept. Thanks all the same to the many contributors that have made this crate what it is!