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// Copyright © 2020 Lexi Frydl
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

/// Returns an `Err` containing a new `fail::Error` from format args.
#[macro_export]
macro_rules! fail {
  ($($args:tt)*) => {
    return Err(fail::err!($($args)*).into())
  };
}

/// Creates a new `fail::Error` from format args.
#[macro_export]
macro_rules! fail_err {
  ($expr:expr) => {
    fail::Error::new(format!("{:#}", $expr))
  };

  ($($args:tt)*) => {
    fail::Error::new(format!($($args)*))
  };
}

/// Returns a closure for using [`Result::map_err`] to add a description before
/// another error.
#[macro_export]
macro_rules! fail_with {
  ($($args:tt)*) => {
    |err| fail::Error::join(format_args!($($args)*), err)
  };
}