::std::io::intrinsics::

Function read_write_inout

pub(super) extern fn read_write_inout<T>(io: inout<T>) -> (Option<T>, inv Option<T>)
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Returns a pair of output/input ports to interact with an inout value.

This function provides exclusive I/O access to the inout port, so only one of those operations can be performed at any given moment. When the value at the input is set to Some(_), the port is driven and the output is None. When the value at the input is set to None, the port is left in a high-impedance state and the output is the incoming value Some(_).