nonmax provides types similar to the std NonZero*
types, but instead requires
that their values are not the maximum for their type. This ensures that
Option<NonMax*>
is no larger than NonMax*
.
nonmax supports every type that has a corresponding non-zero variant in the standard library:
NonMaxI8
NonMaxI16
NonMaxI32
NonMaxI64
NonMaxI128
NonMaxIsize
NonMaxU8
NonMaxU16
NonMaxU32
NonMaxU64
NonMaxU128
NonMaxUsize
use nonmax::{NonMaxI16, NonMaxU8};
let value = NonMaxU8::new(16).expect("16 should definitely fit in a u8");
assert_eq!(value.get(), 16);
assert_eq!(std::mem::size_of_val(&value), 1);
let signed = NonMaxI16::new(i16::min_value()).expect("minimum values are fine");
assert_eq!(signed.get(), i16::min_value());
assert_eq!(std::mem::size_of_val(&signed), 2);
let oops = NonMaxU8::new(255);
assert_eq!(oops, None);
std
(default): implements std::error::Error
for ParseIntError
and
TryFromIntError
. Disable this feature for
#![no_std]
support.nonmax supports Rust 1.47.0 and newer. Until this library reaches 1.0, changes to the MSRV will require major version bumps. After 1.0, MSRV changes will only require minor version bumps, but will need significant justification.