# assert_size
[](https://github.com/skycloudd/assert_size/actions/workflows/rust.yml)
A macro to assert that a type has a specific size at compile time
## Usage
```rust
use assert_size::assert_size;
assert_size!((), 0);
assert_size!(u8, 1);
assert_size!(u16, 2);
struct Foo {
a: u8, // 1 byte
// 1 byte padding
b: u16, // 2 bytes
}
assert_size!(Foo, 4);
```
## License
Licensed under either of
- Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or <http://www.apache.org/licenses/LICENSE-2.0>)
- MIT license ([LICENSE-MIT](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.