Isolated emscripten in new lib

lib/emscripten/emtests/test_exceptions_destroy_virtual.cpp

@@ -0,0 +1,48 @@
+// Copyright 2014 The Emscripten Authors.  All rights reserved.
+// Emscripten is available under two separate licenses, the MIT license and the
+// University of Illinois/NCSA Open Source License.  Both these licenses can be
+// found in the LICENSE file.
+
+#include <stdexcept>
+#include <iostream>
+
+namespace
+{
+  // An exception that can be derived virtually or not based on macro
+  // definition.
+  class test_exception
+    : virtual public std::runtime_error
+  {
+  public:
+    test_exception()
+      : std::runtime_error("test_exception")
+    {}
+  };
+
+  // Test class that logs its construction and destruction.
+  class TestClass
+  {
+  public:
+    TestClass()
+    { std::cout << "TestClass::Construction"  << std::endl; }
+
+    ~TestClass()
+    { std::cout << "TestClass::Destruction" << std::endl; }
+  };
+}
+
+int main()
+{
+  try {
+    TestClass testClass;
+    throw test_exception();
+  }
+  catch (const std::exception& ex) {
+    std::cout << "Caught exception: " << ex.what() << std::endl;
+  }
+
+  // Something goes very wrong between handling the exception and resuming
+  // normal execution when the exception is virtually derived.
+  return 0;
+}
+