eunomia 0.8.0

Atlas datatype law: the Single Source of Truth for numeric/scalar datatype vocabulary (scalars, complex, packed formats, conversions)
Documentation 
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use crate::traits::{CastFrom, FloatElement, NumericElement};
use crate::types::{Bf16, Bf4, Bf8, F16, F32, F4, F64, F8, I16, I32, I8};

// Implement CastFrom between all primitives
macro_rules! impl_cast_primitive_between {
    ($src:ty, $dst:ty) => {
        impl CastFrom<$src> for $dst {
            #[inline(always)]
            fn cast_from(val: $src) -> Self {
                val as $dst
            }
        }
    };
}

impl_cast_primitive_between!(i8, i8);
impl_cast_primitive_between!(i8, i16);
impl_cast_primitive_between!(i8, i32);
impl_cast_primitive_between!(i16, i8);
impl_cast_primitive_between!(i16, i16);
impl_cast_primitive_between!(i16, i32);
impl_cast_primitive_between!(i32, i8);
impl_cast_primitive_between!(i32, i16);
impl_cast_primitive_between!(i32, i32);
impl_cast_primitive_between!(i32, i64);
impl_cast_primitive_between!(i32, u8);
impl_cast_primitive_between!(i32, u16);
impl_cast_primitive_between!(i32, u32);
impl_cast_primitive_between!(i32, u64);
impl_cast_primitive_between!(i32, usize);
impl_cast_primitive_between!(i32, isize);

impl_cast_primitive_between!(i64, i64);
impl_cast_primitive_between!(i64, i8);
impl_cast_primitive_between!(i64, i16);
impl_cast_primitive_between!(i64, i32);

impl_cast_primitive_between!(u8, u8);
impl_cast_primitive_between!(u8, u16);
impl_cast_primitive_between!(u8, u32);
impl_cast_primitive_between!(u8, u64);
impl_cast_primitive_between!(u8, i8);
impl_cast_primitive_between!(u8, i16);
impl_cast_primitive_between!(u8, i32);
impl_cast_primitive_between!(u8, i64);

impl_cast_primitive_between!(u16, u8);
impl_cast_primitive_between!(u16, u16);
impl_cast_primitive_between!(u16, u32);
impl_cast_primitive_between!(u16, u64);
impl_cast_primitive_between!(u16, i8);
impl_cast_primitive_between!(u16, i16);
impl_cast_primitive_between!(u16, i32);
impl_cast_primitive_between!(u16, i64);

impl_cast_primitive_between!(u32, u8);
impl_cast_primitive_between!(u32, u16);
impl_cast_primitive_between!(u32, u32);
impl_cast_primitive_between!(u32, u64);
impl_cast_primitive_between!(u32, i8);
impl_cast_primitive_between!(u32, i16);
impl_cast_primitive_between!(u32, i32);
impl_cast_primitive_between!(u32, i64);

impl_cast_primitive_between!(u64, u8);
impl_cast_primitive_between!(u64, u16);
impl_cast_primitive_between!(u64, u32);
impl_cast_primitive_between!(u64, u64);
impl_cast_primitive_between!(u64, i8);
impl_cast_primitive_between!(u64, i16);
impl_cast_primitive_between!(u64, i32);
impl_cast_primitive_between!(u64, i64);

impl_cast_primitive_between!(f32, f32);
impl_cast_primitive_between!(f32, f64);
impl_cast_primitive_between!(f64, f32);
impl_cast_primitive_between!(f64, f64);

macro_rules! impl_cast_primitive_float_int {
    ($src:ty, $dst:ty) => {
        impl CastFrom<$src> for $dst {
            #[inline(always)]
            fn cast_from(val: $src) -> Self {
                val as $dst
            }
        }
    };
}
impl_cast_primitive_float_int!(f32, i8);
impl_cast_primitive_float_int!(f32, i16);
impl_cast_primitive_float_int!(f32, i32);
impl_cast_primitive_float_int!(f64, i8);
impl_cast_primitive_float_int!(f64, i16);
impl_cast_primitive_float_int!(f64, i32);
impl_cast_primitive_float_int!(i8, f32);
impl_cast_primitive_float_int!(i8, f64);
impl_cast_primitive_float_int!(i16, f32);
impl_cast_primitive_float_int!(i16, f64);
impl_cast_primitive_float_int!(i32, f32);
impl_cast_primitive_float_int!(i32, f64);
impl_cast_primitive_float_int!(i64, f32);
impl_cast_primitive_float_int!(i64, f64);
impl_cast_primitive_float_int!(u8, f32);
impl_cast_primitive_float_int!(u8, f64);
impl_cast_primitive_float_int!(u16, f32);
impl_cast_primitive_float_int!(u16, f64);
impl_cast_primitive_float_int!(u32, f32);
impl_cast_primitive_float_int!(u32, f64);
impl_cast_primitive_float_int!(u64, f32);
impl_cast_primitive_float_int!(u64, f64);

impl_cast_primitive_float_int!(f32, i64);
impl_cast_primitive_float_int!(f32, u8);
impl_cast_primitive_float_int!(f32, u16);
impl_cast_primitive_float_int!(f32, u32);
impl_cast_primitive_float_int!(f32, u64);
impl_cast_primitive_float_int!(f32, usize);
impl_cast_primitive_float_int!(f64, i64);
impl_cast_primitive_float_int!(f64, u8);
impl_cast_primitive_float_int!(f64, u16);
impl_cast_primitive_float_int!(f64, u32);
impl_cast_primitive_float_int!(f64, u64);
impl_cast_primitive_float_int!(f64, usize);

// Casts between wrappers and primitives
macro_rules! impl_cast_float_wrapper_primitive {
    ($wrap:ident, $prim:ty) => {
        impl CastFrom<$wrap> for $prim {
            #[inline(always)]
            fn cast_from(val: $wrap) -> Self {
                <Self as CastFrom<f64>>::cast_from(val.to_f64())
            }
        }
        impl CastFrom<$prim> for $wrap {
            #[inline(always)]
            fn cast_from(val: $prim) -> Self {
                let f = <f64 as CastFrom<$prim>>::cast_from(val);
                <$wrap as FloatElement>::from_f64(f)
            }
        }
    };
}

macro_rules! impl_cast_int_wrapper_primitive {
    ($wrap:ident, $inner:ty, $prim:ty) => {
        impl CastFrom<$wrap> for $prim {
            #[inline(always)]
            fn cast_from(val: $wrap) -> Self {
                <Self as CastFrom<$inner>>::cast_from(val.0)
            }
        }
        impl CastFrom<$prim> for $wrap {
            #[inline(always)]
            fn cast_from(val: $prim) -> Self {
                Self(<$inner as CastFrom<$prim>>::cast_from(val))
            }
        }
    };
}

macro_rules! impl_cast_float_wrapper_primitives {
    ($wrap:ident) => {
        impl_cast_float_wrapper_primitive!($wrap, f32);
        impl_cast_float_wrapper_primitive!($wrap, f64);
        impl_cast_float_wrapper_primitive!($wrap, i8);
        impl_cast_float_wrapper_primitive!($wrap, i16);
        impl_cast_float_wrapper_primitive!($wrap, i32);
    };
}

impl_cast_float_wrapper_primitives!(F16);
impl_cast_float_wrapper_primitives!(F32);
impl_cast_float_wrapper_primitives!(F64);
impl_cast_float_wrapper_primitives!(Bf16);
impl_cast_float_wrapper_primitives!(Bf8);
impl_cast_float_wrapper_primitives!(Bf4);
impl_cast_float_wrapper_primitives!(F8);
impl_cast_float_wrapper_primitives!(F4);

macro_rules! impl_cast_float_wrapper_to_index {
    ($wrap:ident) => {
        impl CastFrom<$wrap> for usize {
            #[inline(always)]
            fn cast_from(val: $wrap) -> Self {
                val.to_f64() as usize
            }
        }
    };
}

impl_cast_float_wrapper_to_index!(F16);
impl_cast_float_wrapper_to_index!(F32);
impl_cast_float_wrapper_to_index!(F64);
impl_cast_float_wrapper_to_index!(Bf16);
impl_cast_float_wrapper_to_index!(Bf8);
impl_cast_float_wrapper_to_index!(Bf4);
impl_cast_float_wrapper_to_index!(F8);
impl_cast_float_wrapper_to_index!(F4);

macro_rules! impl_cast_int_wrapper_primitives {
    ($wrap:ident, $inner:ty) => {
        impl_cast_int_wrapper_primitive!($wrap, $inner, f32);
        impl_cast_int_wrapper_primitive!($wrap, $inner, f64);
        impl_cast_int_wrapper_primitive!($wrap, $inner, i8);
        impl_cast_int_wrapper_primitive!($wrap, $inner, i16);
        impl_cast_int_wrapper_primitive!($wrap, $inner, i32);
    };
}

impl_cast_int_wrapper_primitives!(I8, i8);
impl_cast_int_wrapper_primitives!(I16, i16);
impl_cast_int_wrapper_primitives!(I32, i32);

// Float-to-Int wrapper casts
macro_rules! impl_float_to_int {
    ($src:ident, $dst:ident) => {
        impl CastFrom<$src> for $dst {
            #[inline(always)]
            fn cast_from(val: $src) -> Self {
                Self(val.to_f64() as _)
            }
        }
    };
}
impl_float_to_int!(F16, I8);
impl_float_to_int!(F16, I16);
impl_float_to_int!(F16, I32);
impl_float_to_int!(F32, I8);
impl_float_to_int!(F32, I16);
impl_float_to_int!(F32, I32);
impl_float_to_int!(F64, I8);
impl_float_to_int!(F64, I16);
impl_float_to_int!(F64, I32);
impl_float_to_int!(Bf16, I8);
impl_float_to_int!(Bf16, I16);
impl_float_to_int!(Bf16, I32);
impl_float_to_int!(Bf8, I8);
impl_float_to_int!(Bf8, I16);
impl_float_to_int!(Bf8, I32);
impl_float_to_int!(Bf4, I8);
impl_float_to_int!(Bf4, I16);
impl_float_to_int!(Bf4, I32);
impl_float_to_int!(F8, I8);
impl_float_to_int!(F8, I16);
impl_float_to_int!(F8, I32);
impl_float_to_int!(F4, I8);
impl_float_to_int!(F4, I16);
impl_float_to_int!(F4, I32);

// Int-to-Float wrapper casts
macro_rules! impl_int_to_float {
    ($src:ident, $dst:ident) => {
        impl CastFrom<$src> for $dst {
            #[inline(always)]
            fn cast_from(val: $src) -> Self {
                Self::from_f64(val.0 as f64)
            }
        }
    };
}
impl_int_to_float!(I8, F16);
impl_int_to_float!(I8, F32);
impl_int_to_float!(I8, F64);
impl_int_to_float!(I8, Bf16);
impl_int_to_float!(I8, Bf8);
impl_int_to_float!(I8, Bf4);
impl_int_to_float!(I8, F8);
impl_int_to_float!(I8, F4);
impl_int_to_float!(I16, F16);
impl_int_to_float!(I16, F32);
impl_int_to_float!(I16, F64);
impl_int_to_float!(I16, Bf16);
impl_int_to_float!(I16, Bf8);
impl_int_to_float!(I16, Bf4);
impl_int_to_float!(I16, F8);
impl_int_to_float!(I16, F4);
impl_int_to_float!(I32, F16);
impl_int_to_float!(I32, F32);
impl_int_to_float!(I32, F64);
impl_int_to_float!(I32, Bf16);
impl_int_to_float!(I32, Bf8);
impl_int_to_float!(I32, Bf4);
impl_int_to_float!(I32, F8);
impl_int_to_float!(I32, F4);