sign-bound
| Crates.io | sign-bound |
| lib.rs | sign-bound |
| version | |
| source | src |
| created_at | 2024-09-21 00:11:19.552365 |
| updated_at | 2024-12-02 21:14:42.730901 |
| description | Layout-optimized positive and negative integers |
| homepage | https://github.com/jf2048/sign-bound |
| repository | https://github.com/jf2048/sign-bound.git |
| max_upload_size | |
| id | 1381858 |
| Cargo.toml error: | TOML parse error at line 18, column 1 | 18 | autolib = false | ^^^^^^^ unknown field `autolib`, expected one of `name`, `version`, `edition`, `authors`, `description`, `readme`, `license`, `repository`, `homepage`, `documentation`, `build`, `resolver`, `links`, `default-run`, `default_dash_run`, `rust-version`, `rust_dash_version`, `rust_version`, `license-file`, `license_dash_file`, `license_file`, `licenseFile`, `license_capital_file`, `forced-target`, `forced_dash_target`, `autobins`, `autotests`, `autoexamples`, `autobenches`, `publish`, `metadata`, `keywords`, `categories`, `exclude`, `include` |
| size | 0 |
Jason Francis (jf2048)
documentation
https://docs.rs/sign-bound
README
sign-bound 
Signed integer types for Rust that are bounded to be either positive or
negative. The API is analogous to the built-in NonZero types:
PositiveI8,NegativeI8PositiveI16,NegativeI16PositiveI32,NegativeI32PositiveI64,NegativeI64PositiveIsize,NegativeIsize
The types are all memory-layout optimized, so for example Option<PositiveI32>
and Option<NegativeI32> are both the same size as i32. Using additional
variants in an enum can also have some space benefits.
enum MyEnum {
A(PositiveI16),
B,
C,
D,
}
assert_eq!(size_of::<MyEnum>(), size_of::<PositiveI16>());
Note that due to the implementation details of this crate, the space optimization for any type will not occur if there are more than 128 additional enum variants.
Option<PositiveIsize> is particularly useful as a space-efficient optional
Vec index, since Rust's Vec structure is
limited to
isize::MAX entries.