var_num 0.4.2

Variable length number implementation that can be used as a drop in replacement for any number primitive.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59

mod add;
mod div;
mod mul;
mod sub;

use crate::inner::float::VarFloat;
use crate::VarUInt;
use std::ops::{Add, Div, Mul, Sub};

macro_rules! impl_var_float {
    ($($trait:ident: $method:tt($op:tt)),*) => {
        $(
            impl $trait for VarFloat {
                type Output = VarFloat;

                #[inline]
                #[deny(arithmetic_overflow)]
                fn $method(self, rhs: Self) -> Self::Output {
                    match Self::normalize(self, rhs) {
                        (VarFloat::F32(lhs), VarFloat::F32(rhs)) => VarFloat::F32(lhs $op rhs),
                        (VarFloat::F64(lhs), VarFloat::F64(rhs)) => VarFloat::F64(lhs $op rhs),
                        (lhs, rhs) => panic!("normalization failed: {} {} {}", lhs, stringify!($op), rhs),
                    }
                }
            }
        )*
    };
}

macro_rules! impl_var_uint {
    ($($trait:ident: $method:tt($op:tt)),*) => {
        $(
            impl $trait for VarUInt {
                type Output = VarUInt;

                #[inline]
                #[deny(arithmetic_overflow)]
                fn $method(self, rhs: Self) -> Self::Output {
                    match Self::normalize(self, rhs) {
                        (VarUInt::U8(lhs), VarUInt::U8(rhs)) => VarUInt::U8(lhs $op rhs),
                        (VarUInt::U16(lhs), VarUInt::U16(rhs)) => VarUInt::U16(lhs $op rhs),
                        (VarUInt::U32(lhs), VarUInt::U32(rhs)) => VarUInt::U32(lhs $op rhs),
                        (VarUInt::U64(lhs), VarUInt::U64(rhs)) => VarUInt::U64(lhs $op rhs),
                        (VarUInt::U128(lhs), VarUInt::U128(rhs)) => VarUInt::U128(lhs $op rhs),
                        (lhs, rhs) => panic!("normalization failed: {:?} {} {:?}", lhs, stringify!($op), rhs),
                    }
                }
            }
        )*
    };
}

impl_var_float! {
    Add: add(+), Sub: sub(-), Mul: mul(*), Div: div(/)
}

impl_var_uint! {
    Add: add(+), Sub: sub(-), Mul: mul(*), Div: div(/)
}