Function plain::as_bytes

pub fn as_bytes<S: ?Sized>(s: &S) -> &[u8] where S: 

Safely converts a reference to any type to an immutable byte slice of appropriate length.

Since the result can't be used to modify the source structure, this is perfectly safe to do on any type, even if mostly useless for most Rust types.

This function cannot fail.

Beware: Types that are not #repr(C) mostly have unspecified layout, and in fact can even change layout from build to build. Two types with exactly same definition can even have different layout in the same build! It's perfectly safe to read the data and e.g. print it on screen for educational value, but interpreting the data to mean anything is bound to cause bugs. #repr(C) structures don't have this problem as their layout is perfectly well defined.