pub unsafe extern "rust-intrinsic" fn arith_offset<T>( dst: *const T, offset: isize) -> *const T
Calculates the offset from a pointer, potentially wrapping.
This is implemented as an intrinsic to avoid converting to and from an integer, since the conversion inhibits certain optimizations.
offset intrinsic, this intrinsic does not restrict the resulting pointer to point into or one byte past the end of an allocated object, and it wraps with two's complement arithmetic. The resulting value is not necessarily valid to be used to actually access memory.
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