numlike 0.1.5

Numeric traits for generic mathematics. Less restrictive alternative to num-traits.
Documentation 
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// SPDX-FileCopyrightText: 2026 numlike contributors
//
// SPDX-License-Identifier: MIT OR Apache-2.0

pub trait SignFns: Signum + Abs {}
impl<T: Signum + Abs> SignFns for T {}

pub trait Signum {
    type Output;

    fn signum(self) -> Self::Output;
}

pub trait Abs {
    type Output;

    fn abs(self) -> Self::Output;
}

pub trait CheckedAbs {
    type Output;

    fn checked_abs(self) -> Option<Self::Output>;
}

macro_rules! impl_sign_traits_for_signeds {
    ($($ty:ty),*) => {
        $(
            impl Signum for $ty {
                type Output = $ty;

                #[inline]
                fn signum(self) -> Self::Output {
                    <$ty>::signum(self)
                }
            }

            impl Abs for $ty {
                type Output = $ty;

                #[inline]
                fn abs(self) -> Self::Output {
                    <$ty>::abs(self)
                }
            }

            impl CheckedAbs for $ty {
                type Output = $ty;

                #[inline]
                fn checked_abs(self) -> Option<Self::Output> {
                    <$ty>::checked_abs(self)
                }
            }
        )*
    };
}

impl_sign_traits_for_signeds!(i8, i16, i32, i64, i128, isize);
// TODO: unsigned types, probably.