Finished [re.traits]. I'd like to acknowledge the help of Bjorn Reese with <regex>.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@106478 91177308-0d34-0410-b5e6-96231b3b80d8

test/re/re.traits/getloc.pass.cpp

@@ -14,8 +14,21 @@
 // locale_type getloc()const;
 
 #include <regex>
+#include <cassert>
 
 int main()
 {
-#error getloc not implemented
+    {
+        std::regex_traits<char> t1;
+        assert(t1.getloc().name() == "C");
+        std::regex_traits<wchar_t> t2;
+        assert(t2.getloc().name() == "C");
+    }
+    {
+        std::locale::global(std::locale("en_US"));
+        std::regex_traits<char> t1;
+        assert(t1.getloc().name() == "en_US");
+        std::regex_traits<wchar_t> t2;
+        assert(t2.getloc().name() == "en_US");
+    }
 }