fn addWrap(r: *Managed, a: *const Managed, b: *const Managed, signedness: Signedness, bit_count: usize) Allocator.Error!bool
r = a + b with 2s-complement wrapping semantics. Returns whether any overflow occurred.
r, a and b may be aliases.
Returns an error if memory could not be allocated.
r: *Managed,
a: *const Managed,
b: *const Managed,
signedness: Signedness,
bit_count: usize,