Testing MSVC bugs

test/optional_test_COMPILER_CONVERSION_BUGS1.cpp

@@ -0,0 +1,16 @@
+struct A
+{
+  A(int) {}
+  A(A &&) {}
+};
+
+struct B
+{
+  operator A() { return A(1); }
+  operator int() { return 0; }
+};
+
+int main()
+{
+  A t = B();
+}

test/optional_test_COMPILER_CONVERSION_BUGS2.cpp

@@ -0,0 +1,14 @@
+struct A
+{
+  A(int) {}
+};
+
+struct B
+{
+  operator int() { return 0; }
+};
+
+int main()
+{
+  A t = B();
+}