Thanks to RFC 1504 βint128β, you can use
i128
andu128
directly on nightly Rust starting from 1.16. Using the built-in types are preferred.
Extra primitive types for stable Rust. Currently includes:
-
u128
(unsigned 128-bit integers) -
i128
(signed 128-bit integers)
You may also find other primitive types in other crates:
-
u12
β twelve_bit -
f16
β half -
d128
β decimal -
Complex<T>
β num-complex
# Cargo.toml
[dependencies]
extprim = "1"
If you want to use the u128!()
and i128!()
macros, please include the extprim_literals
plugin.
# Cargo.toml
[dependencies]
extprim = "1"
extprim_literals = "2"
#[macro_use]
extern crate extprim_literals;
extern crate extprim;
use std::str::FromStr;
use extprim::i128::i128;
fn main() {
let a = i128::from_str("100000000000000000000000000000000000000").unwrap();
// convert string to u128 or i128
let b = i128::new(10).pow(38);
// 64-bit integers can be directly new'ed
assert_eq!(a, b);
let c = i128::from_parts(5421010862427522170, 687399551400673280);
// represent using the higher- and lower-64-bit parts
let d = c - a;
// standard operators like +, -, *, /, %, etc. work as expected.
assert_eq!(d, i128::zero());
const e: i128 = i128!(100000000000000000000000000000000000000);
// use the literal macros
assert_eq!(a, e);
}