For an integer-class type we need to use an explicit conversion to size_t.
libstdc++-v3/ChangeLog:
PR libstdc++/115799
* include/bits/ranges_util.h (__find_fn): Make conversion
from difference type ti size_t explicit.
* testsuite/25_algorithms/find/bytes.cc: Check ranges::find with
__gnu_test::test_contiguous_range.
* testsuite/std/ranges/range.cc: Adjust expected difference_type
for __gnu_test::test_contiguous_range.
* testsuite/util/testsuite_iterators.h (contiguous_iterator_wrapper):
Use __max_diff_type as difference type.
(test_range::sentinel, test_sized_range_sized_sent::sentinel):
Ensure that operator- returns difference_type.
cda469a59e