error.rs

// Copyright 2018-2019 Parity Technologies (UK) Ltd.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

macro_rules! bail {
    ($($args:tt)*) => {
        return Err(format_err!($($args)*).into())
    }
}

macro_rules! format_err {
    ($tokens:expr, $($msg:tt)*) => {
        match &$tokens {
            t => {
                syn::parse::Error::new_spanned(t, format_args!($($msg)*))
            }
        }
    }
}