1 unstable release
0.1.0 | Jul 21, 2023 |
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#2886 in Rust patterns
16KB
117 lines
size-trait
This crate provides traits for restricting the size of type parameters.
Example
Zero-sized types
#![feature(generic_const_exprs)]
use size_trait::ZeroSize;
// This struct can only contain `T` when `T` has a size of 0.
struct Zst<T: ZeroSize<true>>(T);
let _ = Zst([0u8; 0]);
let _ = Zst(());
Fixed-sized types
#![feature(generic_const_exprs)]
use size_trait::Size;
// This struct can only contain `T` when `T` has a size of 4 bytes.
struct Fixed4Bytes<T: Size<4>>(T);
let _ = Fixed4Bytes([0u8; 4]);
let _ = Fixed4Bytes(0u32);
Warning
This crate relies on the unstable feature generic_const_exprs
. This feature is only available on nightly Rust. It is also not guaranteed to be stable in the future. Tracking issue #76560.
In order for this crate to work properly, you must enable the generic_const_exprs
feature in your crate:
#![feature(generic_const_exprs)]
Author
- Jacob Lindahl @sudo_build geeklaunch.io