A series of fixed non-negative integer types.
# Constructors
This crate provides a series of macros that used to construct fixed uints in compile time.
The input is a string literal, and the macros support several formats of the input:
- A decimal string.
- A binary string with `0b` prefix.
- A octal string with `0o` prefix.
- A hexadecimal string with `0x` prefix.
And you can use any number of `_` in the string literal to separate it for more readable.
## Examples
```rust
use numext_fixed_uint::{u128, U128};
const U128_100: U128 = u128!("100");
fn main () -> ::std::io::Result<()> {
let x1 = u128!("0b110_0100");
let x2 = u128!("0o144");
let x3 = u128!("0x64");
let y = U128::from(100u8);
assert_eq!(x1, y);
assert_eq!(x2, y);
assert_eq!(x3, y);
assert_eq!(U128_100, y);
Ok(())
}
```