1 files changed, 69 insertions, 0 deletions
diff --git a/libcxx/test/re/re.regex/re.regex.construct/iter_iter_flg.pass.cpp b/libcxx/test/re/re.regex/re.regex.construct/iter_iter_flg.pass.cpp
new file mode 100644
index 00000000000..e4db52c7c71
--- /dev/null
+++ b/libcxx/test/re/re.regex/re.regex.construct/iter_iter_flg.pass.cpp
@@ -0,0 +1,69 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <regex>
+
+// template <class charT, class traits = regex_traits<charT>> class basic_regex;
+
+// template <class ForwardIterator>
+//    basic_regex(ForwardIterator first, ForwardIterator last,
+//                flag_type f = regex_constants::ECMAScript);
+
+#include <regex>
+#include <cassert>
+
+#include "../../iterators.h"
+
+template <class Iter>
+void
+test(Iter first, Iter last, std::regex_constants::syntax_option_type f, unsigned mc)
+{
+    std::basic_regex<typename std::iterator_traits<Iter>::value_type> r(first, last, f);
+    assert(r.flags() == f);
+    assert(r.mark_count() == mc);
+}
+
+int main()
+{
+    typedef forward_iterator<std::string::const_iterator> F;
+    std::string s1("\\(a\\)");
+    std::string s2("\\(a[bc]\\)");
+    std::string s3("\\(a\\([bc]\\)\\)");
+    std::string s4("(a([bc]))");
+
+    test(F(s1.begin()), F(s1.end()), std::regex_constants::basic, 1);
+    test(F(s2.begin()), F(s2.end()), std::regex_constants::basic, 1);
+    test(F(s3.begin()), F(s3.end()), std::regex_constants::basic, 2);
+    test(F(s4.begin()), F(s4.end()), std::regex_constants::basic, 0);
+
+    test(F(s1.begin()), F(s1.end()), std::regex_constants::extended, 0);
+    test(F(s2.begin()), F(s2.end()), std::regex_constants::extended, 0);
+    test(F(s3.begin()), F(s3.end()), std::regex_constants::extended, 0);
+    test(F(s4.begin()), F(s4.end()), std::regex_constants::extended, 2);
+
+    test(F(s1.begin()), F(s1.end()), std::regex_constants::ECMAScript, 0);
+    test(F(s2.begin()), F(s2.end()), std::regex_constants::ECMAScript, 0);
+    test(F(s3.begin()), F(s3.end()), std::regex_constants::ECMAScript, 0);
+    test(F(s4.begin()), F(s4.end()), std::regex_constants::ECMAScript, 2);
+
+    test(F(s1.begin()), F(s1.end()), std::regex_constants::awk, 0);
+    test(F(s2.begin()), F(s2.end()), std::regex_constants::awk, 0);
+    test(F(s3.begin()), F(s3.end()), std::regex_constants::awk, 0);
+    test(F(s4.begin()), F(s4.end()), std::regex_constants::awk, 2);
+
+    test(F(s1.begin()), F(s1.end()), std::regex_constants::grep, 1);
+    test(F(s2.begin()), F(s2.end()), std::regex_constants::grep, 1);
+    test(F(s3.begin()), F(s3.end()), std::regex_constants::grep, 2);
+    test(F(s4.begin()), F(s4.end()), std::regex_constants::grep, 0);
+
+    test(F(s1.begin()), F(s1.end()), std::regex_constants::egrep, 0);
+    test(F(s2.begin()), F(s2.end()), std::regex_constants::egrep, 0);
+    test(F(s3.begin()), F(s3.end()), std::regex_constants::egrep, 0);
+    test(F(s4.begin()), F(s4.end()), std::regex_constants::egrep, 2);
+}