pub const unsafe extern "rust-intrinsic" fn offset<Ptr, Delta>(
) -> Ptr
Calculates the offset from a pointer.
This is implemented as an intrinsic to avoid converting to and from an integer, since the conversion would throw away aliasing information.
This can only be used with
Ptr as a raw pointer type (
Sized pointee and with
isize. Any other
instantiations may arbitrarily misbehave, and that’s not a compiler bug.
Both the starting and resulting pointer must be either in bounds or one byte past the end of an allocated object. If either pointer is out of bounds or arithmetic overflow occurs then any further use of the returned value will result in undefined behavior.
The stabilized version of this intrinsic is