ext 0.0.3

A Rust extension library.
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use core::{
    cmp::Ordering,
    ops::{Add, BitAnd, BitOr, BitXor, Div, Mul, Neg, Not, Rem, Shl, Shr, Sub},
};

/// The continuation supporting for operators
pub trait Op<R>: Sized {
    /// The continuation supporting for Add operator
    ///
    /// # Examples
    ///
    /// ```
    /// use ext::no_std::cps::operators::Op;
    ///
    /// assert_eq!(3, 1.add_c(1, |n| n + 1));
    /// ```
    #[inline(always)]
    fn add_c(self, other: Self, k: impl FnOnce(Self::Output) -> R) -> R
    where
        Self: Add,
    {
        k(self + other)
    }

    /// The continuation supporting for Sub operator
    ///
    /// # Examples
    ///
    /// ```
    /// use ext::no_std::cps::operators::Op;
    ///
    /// fn fibonacci(n: u8, k: &dyn Fn(u8) -> u8) -> u8 {
    ///     match n {
    ///         0 => k(0),
    ///         1 => k(1),
    ///         _ => n.sub_c(1, |x| fibonacci(x, &|r1| n.sub_c(2, |y| fibonacci(y, &|r2| r1.add_c(r2, k)))))
    ///     }
    /// }
    ///
    /// assert_eq!(5, fibonacci(10, &|result| result - 50));
    /// ```
    #[inline(always)]
    fn sub_c(self, other: Self, k: impl FnOnce(Self::Output) -> R) -> R
    where
        Self: Sub,
    {
        k(self - other)
    }

    /// The continuation supporting for Mul operator
    ///
    /// # Examples
    ///
    /// ```
    /// use ext::no_std::cps::operators::Op;
    ///
    /// fn factorial(n: u8, k: &dyn Fn(u8) -> u8) -> u8 {
    ///     match n {
    ///         0 => k(1),
    ///         _ => n.sub_c(1, |x| factorial(x, &|y| y.mul_c(n, k)))
    ///     }
    /// }
    ///
    /// assert_eq!(20, factorial(5, &|result| result - 100));
    /// ```
    #[inline(always)]
    fn mul_c(self, other: Self, k: impl FnOnce(Self::Output) -> R) -> R
    where
        Self: Mul,
    {
        k(self * other)
    }

    /// The continuation supporting for Div operator
    ///
    /// # Examples
    ///
    /// ```
    /// use ext::no_std::cps::operators::Op;
    ///
    /// assert_eq!(10, 15.div_c(3, |n| n * 2));
    /// ```
    #[inline(always)]
    fn div_c(self, other: Self, k: impl FnOnce(Self::Output) -> R) -> R
    where
        Self: Div,
    {
        k(self / other)
    }

    /// The continuation supporting for Rem operator
    ///
    /// # Examples
    ///
    /// ```
    /// use ext::no_std::cps::operators::Op;
    ///
    /// assert_eq!(9, 3.rem_c(2, |n| n + 8));
    /// ```
    #[inline(always)]
    fn rem_c(self, other: Self, k: impl FnOnce(Self::Output) -> R) -> R
    where
        Self: Rem,
    {
        k(self % other)
    }

    /// The continuation supporting for Neg operator
    #[inline(always)]
    fn neg_c(self, k: impl FnOnce(Self::Output) -> R) -> R
    where
        Self: Neg,
    {
        k(self.neg())
    }

    /// The continuation supporting for Not operator
    #[inline(always)]
    fn not_c(self, k: impl FnOnce(Self::Output) -> R) -> R
    where
        Self: Not,
    {
        k(self.not())
    }

    /// The continuation supporting for Shl operator
    #[inline(always)]
    fn shl_c(self, other: Self, k: impl FnOnce(Self::Output) -> R) -> R
    where
        Self: Shl,
    {
        k(self << other)
    }

    /// The continuation supporting for Shr operator
    #[inline(always)]
    fn shr_c(self, other: Self, k: impl FnOnce(Self::Output) -> R) -> R
    where
        Self: Shr,
    {
        k(self >> other)
    }

    /// The continuation supporting for BitAnd operator
    #[inline(always)]
    fn bit_and_c(self, other: Self, k: impl FnOnce(Self::Output) -> R) -> R
    where
        Self: BitAnd,
    {
        k(self & other)
    }

    /// The continuation supporting for BitOr operator
    #[inline(always)]
    fn bit_or_c(self, other: Self, k: impl FnOnce(Self::Output) -> R) -> R
    where
        Self: BitOr,
    {
        k(self | other)
    }

    /// The continuation supporting for BitXor operator
    #[inline(always)]
    fn bit_xor_c(self, other: Self, k: impl FnOnce(Self::Output) -> R) -> R
    where
        Self: BitXor,
    {
        k(self ^ other)
    }

    /// The continuation supporting for the cmp function of Ord operator
    #[inline(always)]
    fn cmp_c(&self, other: &Self, k: impl FnOnce(Ordering) -> R) -> R
    where
        Self: Ord,
    {
        k(self.cmp(other))
    }
}

impl<T, R> Op<R> for T {}