fn applyOffset(addr: usize, comptime off: comptime_int) ?usize
addr: usize
off: comptime_int
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fn applyOffset(addr: usize, comptime off: comptime_int) ?usize { if (off >= 0) return math.add(usize, addr, off) catch return null; return math.sub(usize, addr, -off) catch return null; }