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from b34fa88becb testsuite/102517 - fix FAIL of gcc.dg/pr78408-1.c with OImo [...] new b59be1adbae libstdc++: Simplify std::basic_regex construction and assignment new b701e1f8f68 libstdc++: std::basic_regex should treat '\0' as an ordinar [...] new 9ca4c42a3b7 libstdc++: Check for invalid syntax_option_type values in <regex> new f38cd3bdb4c libstdc++: Implement std::regex_constants::multiline (LWG 2503)

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Summary of changes: libstdc++-v3/include/bits/regex.h | 104 +++++++++++++-------- libstdc++-v3/include/bits/regex_compiler.h | 61 ++++-------- libstdc++-v3/include/bits/regex_compiler.tcc | 10 +- libstdc++-v3/include/bits/regex_constants.h | 25 ++++- libstdc++-v3/include/bits/regex_error.h | 2 + libstdc++-v3/include/bits/regex_executor.h | 70 +++++++++++--- libstdc++-v3/include/bits/regex_scanner.tcc | 10 ++ .../28_regex/algorithms/regex_match/multiline.cc | 74 +++++++++++++++ .../testsuite/28_regex/basic_regex/84110.cc | 39 ++++++++ .../basic_regex/assign/exception_safety.cc | 20 ++++ .../28_regex/basic_regex/ctors/char/other.cc | 37 ++++++++ .../28_regex/basic_regex/ctors/grammar.cc | 53 +++++++++++ 12 files changed, 399 insertions(+), 106 deletions(-) create mode 100644 libstdc++-v3/testsuite/28_regex/algorithms/regex_match/multiline.cc create mode 100644 libstdc++-v3/testsuite/28_regex/basic_regex/84110.cc create mode 100644 libstdc++-v3/testsuite/28_regex/basic_regex/assign/exception_safety.cc create mode 100644 libstdc++-v3/testsuite/28_regex/basic_regex/ctors/char/other.cc create mode 100644 libstdc++-v3/testsuite/28_regex/basic_regex/ctors/grammar.cc