fn subSat(r: *Managed, a: *const Managed, b: *const Managed, signedness: Signedness, bit_count: usize) Allocator.Error!void

r = a - b with 2s-complement saturating semantics.

r, a and b may be aliases.

Returns an error if memory could not be allocated.

Parameters

r: *Managed,
a: *const Managed,
b: *const Managed,
signedness: Signedness,
bit_count: usize,