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vitaut
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Oct 8, 2026
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Thanks for the PR. Could the wide-character-specific code be moved to xchar.h? In particular, the new for_each_codepoint overload and wide-string formatting logic.
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vitaut
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Oct 17, 2026
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Looks like there are CI failures.
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Fix Unicode display width, precision and debug escaping for wide strings. UTF-16 surrogate pairs are decoded together; unpaired surrogates keep their individual escapes.
The wide-character codepoint traversal and string-formatting implementation now live in
xchar.h. Narrow-string formatting remains informat.h, with the existing escape scanner available to headers that do not includexchar.h.Tests focus on Unicode width and precision, surrogate pairs, and debug escaping. The extra char8_t, range, output-iterator and dynamic-width cases have been removed.
Validation with MSVC 19.44, x64, C++20 Debug: full CMake build passes and all 45 xchar tests pass. CTest passes 20 of 22 test programs;
chrono_test.localeandunicode_test.legacy_localefail with the Windows locale errors already recorded in the original validation. Changed code passes clang-format 20 andgit diff --check.