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    // Copyright 2015-2017 Parity Technologies (UK) Ltd.
    // This file is part of Parity.

    // Parity is free software: you can redistribute it and/or modify
    // it under the terms of the GNU General Public License as published by
    // the Free Software Foundation, either version 3 of the License, or
    // (at your option) any later version.

    // Parity is distributed in the hope that it will be useful,
    // but WITHOUT ANY WARRANTY; without even the implied warranty of
    // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    // GNU General Public License for more details.

    // You should have received a copy of the GNU General Public License
    // along with Parity.  If not, see <http://www.gnu.org/licenses/>.

    use std::fmt;
    use cli::Args;

    #[derive(Debug, PartialEq)]
    pub enum Deprecated {
    	DoesNothing(&'static str),
    	Replaced(&'static str, &'static str),
    }

    impl fmt::Display for Deprecated {
    	fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
    		match *self {
    			Deprecated::DoesNothing(s) => write!(f, "Option '{}' does nothing. It's on by default", s),
    			Deprecated::Replaced(old, new) => write!(f, "Option '{}' is deprecated. Please use '{}' instead", old, new),
    		}
    	}
    }

    impl Deprecated {
    	fn jsonrpc() -> Self {
    		Deprecated::DoesNothing("--jsonrpc")
    	}

    	fn rpc() -> Self {
    		Deprecated::DoesNothing("--rpc")
    	}

    	fn jsonrpc_off() -> Self {
    		Deprecated::Replaced("--jsonrpc-off", "--no-jsonrpc")
    	}

    	fn webapp() -> Self {
    		Deprecated::DoesNothing("--webapp")
    	}

    	fn dapps_off() -> Self {
    		Deprecated::Replaced("--dapps-off", "--no-dapps")
    	}

    	fn ipcdisable() -> Self {
    		Deprecated::Replaced("--ipcdisable", "--no-ipc")
    	}

    	fn ipc_off() -> Self {
    		Deprecated::Replaced("--ipc-off", "--no-ipc")
    	}

    	fn etherbase() -> Self {
    		Deprecated::Replaced("--etherbase", "--author")
    	}

    	fn extradata() -> Self {
    		Deprecated::Replaced("--extradata", "--extra-data")
    	}
    }

    pub fn find_deprecated(args: &Args) -> Vec<Deprecated> {
    	let mut result = vec![];

    	if args.flag_jsonrpc {
    		result.push(Deprecated::jsonrpc());
    	}

    	if args.flag_rpc {
    		result.push(Deprecated::rpc());
    	}

    	if args.flag_jsonrpc_off {
    		result.push(Deprecated::jsonrpc_off());
    	}

    	if args.flag_webapp {
    		result.push(Deprecated::webapp())
    	}

    	if args.flag_dapps_off {
    		result.push(Deprecated::dapps_off());
    	}

    	if args.flag_ipcdisable {
    		result.push(Deprecated::ipcdisable());
    	}

    	if args.flag_ipc_off {
    		result.push(Deprecated::ipc_off());
    	}

    	if args.flag_etherbase.is_some() {
    		result.push(Deprecated::etherbase());
    	}

    	if args.flag_extradata.is_some() {
    		result.push(Deprecated::extradata());
    	}

    	result
    }

    #[cfg(test)]
    mod tests {
    	use cli::Args;
    	use super::{Deprecated, find_deprecated};

    	#[test]
    	fn test_find_deprecated() {
    		assert_eq!(find_deprecated(&Args::default()), vec![]);
    		assert_eq!(find_deprecated(&{
    			let mut args = Args::default();
    			args.flag_jsonrpc = true;
    			args.flag_rpc = true;
    			args.flag_jsonrpc_off = true;
    			args.flag_webapp = true;
    			args.flag_dapps_off = true;
    			args.flag_ipcdisable = true;
    			args.flag_ipc_off = true;
    			args.flag_etherbase = Some(Default::default());
    			args.flag_extradata = Some(Default::default());
    			args
    		}), vec![
    			Deprecated::jsonrpc(),
    			Deprecated::rpc(),
    			Deprecated::jsonrpc_off(),
    			Deprecated::webapp(),
    			Deprecated::dapps_off(),
    			Deprecated::ipcdisable(),
    			Deprecated::ipc_off(),
    			Deprecated::etherbase(),
    			Deprecated::extradata(),
    		]);
    	}
    }

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