https://issues.dlang.org/show_bug.cgi?id=18957

          Issue ID: 18957
           Summary: extern(C++) doesn't mangle 'std' correctly on posix
                    systems
           Product: D
           Version: D2
          Hardware: x86
                OS: Windows
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: dmd
          Assignee: nobody@puremagic.com
          Reporter: turkeyman@gmail.com

extern (C++, std)
{
  struct test {}
}
extern (C++) void test(ref const(std.test) t) {}

Expect: _Z4testRKNSt4testE
Actual: _Z4testRKN3std4testE

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