Later assignments to accessors should not overwrite the original field
`auto var = l[0]` has a strange quirk: `var` is actually an accessor and
not an object, so any later assignment of `var = ...` would modify l[0]
instead of `var`. This is surprising compared to the non-auto assignment
`py::object var = l[0]; var = ...`.
By overloading `operator=` on lvalue/rvalue, the expected behavior is
restored even for `auto` variables.
diff --git a/include/pybind11/pybind11.h b/include/pybind11/pybind11.h
index 3e81d4b..686fe53 100644
--- a/include/pybind11/pybind11.h
+++ b/include/pybind11/pybind11.h
@@ -18,6 +18,7 @@
# pragma warning(disable: 4800) // warning C4800: 'int': forcing value to bool 'true' or 'false' (performance warning)
# pragma warning(disable: 4996) // warning C4996: The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name
# pragma warning(disable: 4702) // warning C4702: unreachable code
+# pragma warning(disable: 4522) // warning C4522: multiple assignment operators specified
#elif defined(__INTEL_COMPILER)
# pragma warning(push)
# pragma warning(disable: 186) // pointless comparison of unsigned integer with zero