This is technically not a breaking change because it won't cause existing code to not compile anymore. However it is an important
semantic change to justify a major release:
The arguments of copysign are now swapped: a.copysign(b) will copy the sign of b into a (the previous
behavior copied the sign of a into b). This change was needed to align with the argument order used by
the standard library, thus avoiding hard-to-debug errors due to mismatching conventions.
The arguments of simd_copysign are now swapped too.
This is technically not a breaking change because it won't cause existing code to not compile anymore. However it is an important semantic change to justify a major release:
copysignare now swapped:a.copysign(b)will copy the sign ofbintoa(the previous behavior copied the sign ofaintob). This change was needed to align with the argument order used by the standard library, thus avoiding hard-to-debug errors due to mismatching conventions.simd_copysignare now swapped too.