fixed_wide_vectors/fixed_wide/src/wide.rs

use bnum::types::{I256,I512};
use fixed::{FixedI64,FixedI128};
use typenum::{Sum, Unsigned};
use typenum::consts::{U32,U64,U96,U128,U160,U192,U224,U256};

pub trait WideMul<Rhs=Self>{
	type Output;
	fn wide_mul(self,rhs:Rhs)->Self::Output;
}

pub struct Fixed<Int,Frac>{
	bits:Int,
	phantom:std::marker::PhantomData<Frac>,
}
pub type FixedI256<Frac>=Fixed<I256,Frac>;
pub type FixedI512<Frac>=Fixed<I512,Frac>;

impl<A,B> WideMul<FixedI128<B>> for FixedI128<A>
	where
		A:std::ops::Add<B>,
		B:Unsigned,
{
	type Output=FixedI256<Sum<A,B>>;
	fn wide_mul(self,rhs:FixedI128<B>)->Self::Output{
		FixedI256{
			bits:I256::from(self.to_bits())*I256::from(rhs.to_bits()),
			phantom:std::marker::PhantomData,
		}
	}
}