I recall the idea of passing a specific flag to `compile()` for accepting await and family on top level of passed code string.

Than compile can return a code object with CO_COROUTINE flag set.

Returned code object can be analyzed for this flag and executed with `await exec(code)`.

Actual coroutine executor can be asyncio/trio/twisted/whatever, it depends on what code calls this `await`.

Did I miss something?