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from c97436f84ce RISC-V: Fix avl-type operand index error for ZVBC new 74a0dab1829 libstdc++: Implement P2909R4 ("Dude, where's my char?") for C++20 new 37a4c5c23a2 libstdc++: Add Unicode-aware width estimation for std::format new 2a8ee2592e4 libstdc++: Implement P2905R2 "Runtime format strings" for C++20 new cddaff46adf libstdc++: Implement P2918R0 "Runtime format strings II" for C++26

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Summary of changes: contrib/unicode/GraphemeBreakProperty.txt | 1475 ++++++++++++++++++++ contrib/unicode/README | 12 +- contrib/unicode/emoji-data.txt | 1320 ++++++++++++++++++ contrib/unicode/gen_libstdcxx_unicode_data.py | 222 +++ libstdc++-v3/include/Makefile.am | 2 + libstdc++-v3/include/Makefile.in | 2 + libstdc++-v3/include/bits/chrono_io.h | 15 +- libstdc++-v3/include/bits/unicode-data.h | 449 ++++++ libstdc++-v3/include/bits/unicode.h | 1065 ++++++++++++++ libstdc++-v3/include/bits/version.def | 9 + libstdc++-v3/include/bits/version.h | 141 +- libstdc++-v3/include/std/format | 182 ++- libstdc++-v3/include/std/ostream | 4 +- libstdc++-v3/include/std/print | 4 +- libstdc++-v3/src/c++23/print.cc | 2 +- libstdc++-v3/testsuite/20_util/duration/io.cc | 3 +- libstdc++-v3/testsuite/ext/unicode/view.cc | 102 ++ .../testsuite/std/format/arguments/args.cc | 26 +- .../testsuite/std/format/arguments/args_neg.cc | 12 + .../testsuite/std/format/arguments/lwg3810.cc | 8 +- .../testsuite/std/format/functions/format.cc | 100 +- .../testsuite/std/format/functions/vformat_to.cc | 9 +- .../testsuite/std/format/runtime_format.cc | 37 + libstdc++-v3/testsuite/std/format/string.cc | 7 +- libstdc++-v3/testsuite/std/time/day/io.cc | 4 +- libstdc++-v3/testsuite/std/time/month/io.cc | 4 +- libstdc++-v3/testsuite/std/time/weekday/io.cc | 4 +- libstdc++-v3/testsuite/std/time/year/io.cc | 4 +- .../testsuite/std/time/year_month_day/io.cc | 4 +- 29 files changed, 5046 insertions(+), 182 deletions(-) create mode 100644 contrib/unicode/GraphemeBreakProperty.txt create mode 100644 contrib/unicode/emoji-data.txt create mode 100755 contrib/unicode/gen_libstdcxx_unicode_data.py create mode 100644 libstdc++-v3/include/bits/unicode-data.h create mode 100644 libstdc++-v3/include/bits/unicode.h create mode 100644 libstdc++-v3/testsuite/ext/unicode/view.cc create mode 100644 libstdc++-v3/testsuite/std/format/arguments/args_neg.cc create mode 100644 libstdc++-v3/testsuite/std/format/runtime_format.cc