custom_float 0.3.1

Custom floating-point types
Documentation 
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use num_traits::AsPrimitive;

use crate::{util, Fp, UInt};

macro_rules! impl_as_primitive_uint {
    ($($i:ty),*) => {
        $(
            impl<U: UInt, const SIGN_BIT: bool, const EXP_SIZE: usize, const INT_SIZE: usize, const FRAC_SIZE: usize, const EXP_BASE: usize> AsPrimitive<$i> for Fp<U, SIGN_BIT, EXP_SIZE, INT_SIZE, FRAC_SIZE, EXP_BASE>
            where
                U: 'static,
                [(); util::bitsize_of::<U>() - SIGN_BIT as usize - EXP_SIZE - INT_SIZE - FRAC_SIZE]:,
                [(); EXP_BASE - 2]:
            {
                #[inline]
                fn as_(self) -> $i
                {
                    self.to_uint_wrapping()
                }
            }
        )*
    };
}

impl_as_primitive_uint!(u8, u16, u32, usize, u64, u128/*, U256*/);

macro_rules! impl_as_primitive_int {
    ($($i:ty),*) => {
        $(
            impl<U: UInt, const SIGN_BIT: bool, const EXP_SIZE: usize, const INT_SIZE: usize, const FRAC_SIZE: usize, const EXP_BASE: usize> AsPrimitive<$i> for Fp<U, SIGN_BIT, EXP_SIZE, INT_SIZE, FRAC_SIZE, EXP_BASE>
            where
                U: 'static,
                [(); util::bitsize_of::<U>() - SIGN_BIT as usize - EXP_SIZE - INT_SIZE - FRAC_SIZE]:,
                [(); EXP_BASE - 2]:
            {
                #[inline]
                fn as_(self) -> $i
                {
                    self.to_int_wrapping()
                }
            }
        )*
    };
}

impl_as_primitive_int!(i8, i16, i32, isize, i64, i128/*, I256*/);

macro_rules! impl_as_primitive_float {
    ($($f:ty),*) => {
        $(
            impl<U: UInt, const SIGN_BIT: bool, const EXP_SIZE: usize, const INT_SIZE: usize, const FRAC_SIZE: usize, const EXP_BASE: usize> AsPrimitive<$f> for Fp<U, SIGN_BIT, EXP_SIZE, INT_SIZE, FRAC_SIZE, EXP_BASE>
            where
                U: 'static,
                [(); util::bitsize_of::<U>() - SIGN_BIT as usize - EXP_SIZE - INT_SIZE - FRAC_SIZE]:,
                [(); EXP_BASE - 2]:
            {
                #[inline]
                fn as_(self) -> $f
                {
                    Into::<$f>::into(self)
                }
            }
        )*
    };
}
impl_as_primitive_float!(f16, f32, f64, f128);

impl<T: UInt, U: UInt, const S: bool, const SIGN_BIT: bool, const E: usize, const EXP_SIZE: usize, const I: usize, const INT_SIZE: usize, const F: usize, const FRAC_SIZE: usize, const B: usize, const EXP_BASE: usize> AsPrimitive<Fp<T, S, E, I, F, B>> for Fp<U, SIGN_BIT, EXP_SIZE, INT_SIZE, FRAC_SIZE, EXP_BASE>
where
    T: 'static,
    [(); util::bitsize_of::<T>() - S as usize - E - I - F]:,
    [(); B - 2]:,
    U: 'static,
    [(); util::bitsize_of::<U>() - SIGN_BIT as usize - EXP_SIZE - INT_SIZE - FRAC_SIZE]:,
    [(); EXP_BASE - 2]:
{
    fn as_(self) -> Fp<T, S, E, I, F, B>
    {
        Fp::from_fp(self)
    }
}