Add code to honor the match_not_bol and match_not_eol regex flats. Fixes PR#22651. Thanks to Jim Porter for the report and suggested fix.

llvm-svn: 232733

1 files changed, 50 insertions, 0 deletions

diff --git a/libcxx/test/std/re/re.const/re.matchflag/match_not_eol.pass.cpp b/libcxx/test/std/re/re.const/re.matchflag/match_not_eol.pass.cpp
new file mode 100644
index 00000000000..594c9fb9845
--- /dev/null
+++ b/libcxx/test/std/re/re.const/re.matchflag/match_not_eol.pass.cpp
@@ -0,0 +1,50 @@
+// -*- C++ -*-
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <regex>
+
+// match_not_eol:
+//     The last character in the sequence [first,last) shall be treated as 
+//     though it is not at the end of a line, so the character "$" in 
+//     the regular expression shall not match [last,last).
+
+#include <regex>
+#include <cassert>
+
+int main()
+{
+    {
+    std::string target = "foo";
+    std::regex re("foo$");
+    assert( std::regex_match(target, re));
+    assert(!std::regex_match(target, re, std::regex_constants::match_not_eol));
+    }
+
+    {
+    std::string target = "foo";
+    std::regex re("foo");
+    assert( std::regex_match(target, re));
+    assert( std::regex_match(target, re, std::regex_constants::match_not_eol));
+    }
+
+    {
+    std::string target = "refoo";
+    std::regex re("foo$");
+    assert( std::regex_search(target, re));
+    assert(!std::regex_search(target, re, std::regex_constants::match_not_eol));
+    }
+
+    {
+    std::string target = "refoo";
+    std::regex re("foo");
+    assert( std::regex_search(target, re));
+    assert( std::regex_search(target, re, std::regex_constants::match_not_eol));
+    }
+}