What C++ [[attributes]] are implemented by cheerp?

The C++11 specification defined [[attributes]] which can be used to specify/influence implementation-defined behavior. Cheerp supports this for specifying whether you're writing C++ code meant to be compiled into [[cheerp::genericjs]] or [[cheerp::wasm]] code. This results in your C++ code being compiled into the .js or .wasm output of the compiler respectively. (Right?)

My question: What attributes does Cheerp know and what do they all do?

So far, I've seen the following attributes:

[[cheerp::genericjs]]
[[cheerp::wasm]]
[[cheerp::asmjs]]
[[cheerp::client_layout]]
[[cheerp::static]]
[[cheerp::jsexport]]