[bug #68061] Matlab-compatible bitXXX finctions

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Follow-up Comment #3, bug #68061 (group octave):

Re-base to current (2026-03-26) tip.
Some code clean up:
Remove HAVE_CXX_BITWISE_OP_TEMPLATES guard and hand-rolled
std::bit_and/bit_or/bit_xor injected into namespace std.
Use C++14 transparent comparators (std::bit_and<>{}, etc.) in bitopx.
Change return type of bitop_arg_is_int, bitop_arg_is_bool, bitop_arg_is_float
from int to bool.

Add fast-path optimization if in and out arrays are of the same size.

(file bug68061_bitxxx_cpp_20260324_100.cset)

Make check still passes.

Dmitri.
-- 


(file #58394)

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