turbostore 0.1.2

A concurrent, in-memory, in-process, Redis-like storage for Rust.
Documentation 
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//! Math utilities for [`crate::TurboStore::incr`] and [`crate::TurboStore::decr`]. The code was
//! taken from the [`num-traits` crate]. The crate was not added as a dependency since the code
//! TurboStore depends on is a tiny portion of the `num-traits` crate.
//! 
//! `num-trait` is indirectly depended on via `chrono`, but since `chrono` may be removed as a
//! dependency in the future this is kept for stability and less dependency bloat.
//! 
//! [`num-traits` crate]: https://docs.rs/num-traits/0.2.19/src/num_traits/ops/saturating.rs.html#5

use std::ops::{Add, Sub};

macro_rules! saturating_impl {
    ($trait_name:ident, $method:ident, $t:ty) => {
        impl $trait_name for $t {
            #[inline]
            fn $method(&self, v: &Self) -> Self {
                <$t>::$method(*self, *v)
            }
        }
    };
}

/// Performs addition that saturates at the numeric bounds instead of overflowing.
pub trait SaturatingAdd: Sized + Add<Self, Output = Self> {
    /// Saturating addition. Computes `self + other`, saturating at the relevant high or low boundary of
    /// the type.
    fn saturating_add(&self, v: &Self) -> Self;
}

saturating_impl!(SaturatingAdd, saturating_add, u8);
saturating_impl!(SaturatingAdd, saturating_add, u16);
saturating_impl!(SaturatingAdd, saturating_add, u32);
saturating_impl!(SaturatingAdd, saturating_add, u64);
saturating_impl!(SaturatingAdd, saturating_add, usize);
saturating_impl!(SaturatingAdd, saturating_add, u128);

saturating_impl!(SaturatingAdd, saturating_add, i8);
saturating_impl!(SaturatingAdd, saturating_add, i16);
saturating_impl!(SaturatingAdd, saturating_add, i32);
saturating_impl!(SaturatingAdd, saturating_add, i64);
saturating_impl!(SaturatingAdd, saturating_add, isize);
saturating_impl!(SaturatingAdd, saturating_add, i128);

/// Performs subtraction that saturates at the numeric bounds instead of overflowing.
pub trait SaturatingSub: Sized + Sub<Self, Output = Self> {
    /// Saturating subtraction. Computes `self - other`, saturating at the relevant high or low boundary of
    /// the type.
    fn saturating_sub(&self, v: &Self) -> Self;
}

saturating_impl!(SaturatingSub, saturating_sub, u8);
saturating_impl!(SaturatingSub, saturating_sub, u16);
saturating_impl!(SaturatingSub, saturating_sub, u32);
saturating_impl!(SaturatingSub, saturating_sub, u64);
saturating_impl!(SaturatingSub, saturating_sub, usize);
saturating_impl!(SaturatingSub, saturating_sub, u128);

saturating_impl!(SaturatingSub, saturating_sub, i8);
saturating_impl!(SaturatingSub, saturating_sub, i16);
saturating_impl!(SaturatingSub, saturating_sub, i32);
saturating_impl!(SaturatingSub, saturating_sub, i64);
saturating_impl!(SaturatingSub, saturating_sub, isize);
saturating_impl!(SaturatingSub, saturating_sub, i128);