Macro composite_custom_message_handler

macro_rules! composite_custom_message_handler {
    (
		$handler_visibility:vis struct $handler:ident {
			$($field_visibility:vis $field:ident: $type:ty),* $(,)*
		}

		$message_visibility:vis enum $message:ident {
			$($variant:ident($pattern:pat)),* $(,)*
		}
	) => { ... };
}

Defines a composite type implementing CustomMessageHandler (and therefore also implementing CustomMessageReader), along with a corresponding enumerated custom message Type, from one or more previously defined custom message handlers.

Useful for parameterizing PeerManager with custom message handling for one or more sets of custom messages. Message type ids may be given as a valid match pattern, including ranges, though using OR-ed literal patterns is preferred in order to catch unreachable code for conflicting handlers.

See crate documentation for example usage.