cervine
A slightly more flexible clone-on-write smart pointer; roughly to T: Borrow<R>
as alloc::borrow::Cow
is to B: ToOwned
.
The owned and reference types can be chosen independently, which means for example smartstring's String
can be used in the owned variant instead of alloc
's.
Serde support is optional via the "serde"
feature and no_std
-compatible.
Note that deserialisation currently always happens by value and serde::Serialize
is looked up only on the reference type. This may change in a major version upgrade, likely only after specialization becomes available.
Installation
Please use cargo-edit to always add the latest version of this library:
cargo add cervine
Examples
Same type (T = R = [bool; 2]
):
use Cow;
use *;
use Borrow as _;
let data = ;
let mut cow = Borrowed;
if thread_rng.gen
let array_ref: & = cow.borrow;
Different types (T = String
and R = str
):
use Cow;
use *;
use String;
let mut cow = Borrowed;
if thread_rng.gen
let str_ref: &str = cow.as_ref;
License
Licensed under either of
- Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
- MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)
at your option.
Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.
Code of Conduct
Changelog
Versioning
cervine
strictly follows Semantic Versioning 2.0.0 with the following exceptions:
- The minor version will not reset to 0 on major version changes (except for v1).
Consider it the global feature level. - The patch version will not reset to 0 on major or minor version changes (except for v0.1 and v1).
Consider it the global patch level.
This includes the Rust version requirement specified above.
Earlier Rust versions may be compatible, but this can change with minor or patch releases.
Which versions are affected by features and patches can be determined from the respective headings in CHANGELOG.md.