From language/operators

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Coerces the argument to a non-variable-encoding string buffer type (e.g. buf8, buf16, buf32) and then flips each bit in that buffer.

Please note that this has not yet been implemented.

From language/operators

See Original text in context

Coerces each argument to a non-variable-encoding string buffer type (e.g. buf8, buf16, buf32) and then performs a numeric bitwise XOR on corresponding integers of the two buffers, padding the shorter buffer with zeroes.