Function constmuck::cast_ref_alt[−][src]

pub const fn cast_ref_alt<T, U>(
    from: &T, 
    bounds: (ImplsPod<T>, ImplsPod<U>)
) -> &U
Expand description

Cast a &T to &U

Requires both T and U to implement Pod.

Panics

This function panics in these cases:

  • The alignment of T is larger than U
  • The size of T is not equal to U

Difference with bytemuck

This function requires T to have an alignment larger or equal to U, while bytemuck::cast_ref only requires from to happen to be aligned to U.

Example

use constmuck::{cast_ref_alt, infer};

const U8: &[u8; 2] = cast_ref_alt(&100u16.to_le(), infer!());

assert_eq!(U8[0], 100u8);
assert_eq!(U8[1], 0);