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Describe #[repr(align(x))] semantics on enums #619

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Jun 17, 2019
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Describe #[repr(align(x))] semantics on enums #619

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4 changes: 4 additions & 0 deletions src/type-layout.md
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Expand Up @@ -322,6 +322,10 @@ The `align` and `packed` modifiers cannot be applied on the same type and a
`packed` type cannot transitively contain another `align`ed type. `align` and
`packed` may only be applied to the [default] and [`C`] representations.

The `align` modifier can also be applied on an `enum`.
When it is, the effect on the `enum`'s alignment is the same as if the `enum`
was wrapped in a newtype `struct` with the same `align` modifier.

<div class="warning">

***Warning:*** Dereferencing an unaligned pointer is [undefined behavior] and
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