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Define raw pointer transmute behavior #1661

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Define raw pointer transmute behavior #1661

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4 changes: 4 additions & 0 deletions src/expressions/operator-expr.md
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Expand Up @@ -489,6 +489,10 @@ assert_eq!(values[1], 3);
such as `struct Foo(i32, [u8])` or `(u64, Foo)`.
- If `T` is unsized and `U` is sized, the cast discards all metadata that completes the wide pointer `T` and produces a thin pointer `U` consisting of the data part of the unsized pointer.

For any `*const T` / `*mut T` to `*const U` / `*mut U` cast which is well-defined as described
in this section, `core::mem::transmute<*const T, *const U>` / `core::mem::transmute<*mut T, *mut U>`
has the same behavior as the corresponding cast.

## Assignment expressions

> **<sup>Syntax</sup>**\
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