1 files changed, 73 insertions, 0 deletions
diff --git a/test/std/thread/thread.threads/thread.thread.class/thread.thread.member/detach.pass.cpp b/test/std/thread/thread.threads/thread.thread.class/thread.thread.member/detach.pass.cpp
new file mode 100644
index 000000000000..f4a4d1f777f1
--- /dev/null
+++ b/test/std/thread/thread.threads/thread.thread.class/thread.thread.member/detach.pass.cpp
@@ -0,0 +1,73 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
+
+// <thread>
+
+// class thread
+
+// void detach();
+
+#include <thread>
+#include <atomic>
+#include <cassert>
+
+std::atomic_bool done = ATOMIC_VAR_INIT(false);
+
+class G
+{
+    int alive_;
+    bool done_;
+public:
+    static int n_alive;
+    static bool op_run;
+
+    G() : alive_(1), done_(false)
+    {
+        ++n_alive;
+    }
+
+    G(const G& g) : alive_(g.alive_), done_(false)
+    {
+        ++n_alive;
+    }
+    ~G()
+    {
+        alive_ = 0;
+        --n_alive;
+        if (done_) done = true;
+    }
+
+    void operator()()
+    {
+        assert(alive_ == 1);
+        assert(n_alive >= 1);
+        op_run = true;
+        done_ = true;
+    }
+};
+
+int G::n_alive = 0;
+bool G::op_run = false;
+
+int main()
+{
+    {
+        G g;
+        std::thread t0(g);
+        assert(t0.joinable());
+        t0.detach();
+        assert(!t0.joinable());
+        while (!done) {}
+        assert(G::op_run);
+        assert(G::n_alive == 1);
+    }
+    assert(G::n_alive == 0);
+}