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Code Issues Releases Activity

Remove unneeded macro from Enum Sizes slide (#1015)

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* Remove unneeded macro from Enum Sizes slide

* Update src/enums/sizes.md

---------

Co-authored-by: Martin Geisler <martin@geisler.net>
This commit is contained in:
Dominik Maier
2023-07-21 16:23:30 +02:00
committed by GitHub
parent e2038b4897
commit 6e367132ad
1 changed files with 5 additions and 6 deletions
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9
src/enums/sizes.md
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@ -3,13 +3,12 @@
Rust enums are packed tightly, taking constraints due to alignment into account:
```rust,editable
use std::any::type_name;
use std::mem::{align_of, size_of};
macro_rules! dbg_size {
($t:ty) => {
fn dbg_size<T>() {
println!("{}: size {} bytes, align: {} bytes",
stringify!($t), size_of::<$t>(), align_of::<$t>());
};
type_name::<T>(), size_of::<T>(), align_of::<T>());
}
enum Foo {
@ -18,7 +17,7 @@ enum Foo {
}
fn main() {
dbg_size!(Foo);
dbg_size::<Foo>();
}
```