Std.Net.listen

fn

This is a callable function.

What it does

Wait for connections on a port.

A port of zero asks the machine to choose one, which portOf then answers.

That is how a program starts a listener without picking a number something

else may already hold, and it is what a test wants.

The address is made reusable before it is bound, so a program restarted

straight after stopping can bind the port it just had rather than waiting

out the connections that may still be in flight.

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• The text after the name is the type checked by Pudu.
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• Result makes success and recoverable failure part of the function's type.