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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 std::error::Error as StdError;
    use bytes::FromBytesError;

    #[derive(Debug, PartialEq, Eq)]
    /// Error concerning the RLP decoder.
    pub enum DecoderError {
    	/// Couldn't convert given bytes to an instance of required type.
    	FromBytesError(FromBytesError),
    	/// Data has additional bytes at the end of the valid RLP fragment.
    	RlpIsTooBig,
    	/// Data has too few bytes for valid RLP.
    	RlpIsTooShort,
    	/// Expect an encoded list, RLP was something else.
    	RlpExpectedToBeList,
    	/// Expect encoded data, RLP was something else.
    	RlpExpectedToBeData,
    	/// Expected a different size list.
    	RlpIncorrectListLen,
    	/// Data length number has a prefixed zero byte, invalid for numbers.
    	RlpDataLenWithZeroPrefix,
    	/// List length number has a prefixed zero byte, invalid for numbers.
    	RlpListLenWithZeroPrefix,
    	/// Non-canonical (longer than necessary) representation used for data or list.
    	RlpInvalidIndirection,
    	/// Declared length is inconsistent with data specified after.
    	RlpInconsistentLengthAndData,
    	/// Custom rlp decoding error.
    	Custom(&'static str),
    }

    impl StdError for DecoderError {
    	fn description(&self) -> &str {
    		"builder error"
    	}
    }

    impl fmt::Display for DecoderError {
    	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
    		fmt::Debug::fmt(&self, f)
    	}
    }

    impl From<FromBytesError> for DecoderError {
    	fn from(err: FromBytesError) -> DecoderError {
    		DecoderError::FromBytesError(err)
    	}
    }

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