Fix PR#35967: '<regex> syntax_option_type is not a proper bitmask' Sadly, this is an ABI break, so it's only available if you define either '_LIBCPP_ABI_VERSION > 2' or '_LIBCPP_ABI_UNSTABLE' or '_LIBCPP_ABI_REGEX_CONSTANTS_NONZERO' and rebuild your dylib.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@357190 91177308-0d34-0410-b5e6-96231b3b80d8

test/std/re/re.regex/re.regex.construct/default.pass.cpp

@@ -21,7 +21,7 @@ void
 test()
 {
     std::basic_regex<CharT> r;
-    assert(r.flags() == 0);
+    assert(r.flags() == std::regex_constants::ECMAScript);
     assert(r.mark_count() == 0);
 }