Module const_irc_message_parser::command
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Method for parsing and extracting a Command.
§Purpose
Command is part of the IRC Message Protocol.
It must never be empty.
The Command occurs after the Source and before the Parameters.
Since both Tags and Source are optional it is possible for Command
to be the first component in an IrcMsg.
It can either be a Named or a Numeric command.
A Numeric is a 3 digit string representing a reply or an error to a Named command.
Some Named commands are only available after successful capability negotiation.
For such commands an IRC server must never send them to an IRC client if the client doesn’t indicate support
through the CAP command.
Some commands do not require any Parameters but most do.
The amount of Parameters and what they mean depends on the Command.