Why we have 3 similar function and how aliasing impacts the compiler

openmymind

Zig offers three memory copy functions: @memcpy, copyForwards, and copyBackwards. While @memcpy is suitable for non-overlapping memory regions, copyForwards and copyBackwards handle cases where source and destination might overlap. Examples illustrate the nuances of each function, along with an explanation of how aliasing affects code correctness and compiler optimizations. Utilizing the appropriate function ensures efficient and error-free memory operations.

Zig's @memcpy, copyForwards and copyBackwards