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-rw-r--r--ctr-std/src/termination.rs80
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diff --git a/ctr-std/src/termination.rs b/ctr-std/src/termination.rs
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--- a/ctr-std/src/termination.rs
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-// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-use error::Error;
-// TODO: Add these consts to the libc crate for newlib
-mod exit {
- pub const SUCCESS: i32 = 0;
- pub const FAILURE: i32 = 1;
-}
-
-/// A trait for implementing arbitrary return types in the `main` function.
-///
-/// The c-main function only supports to return integers as return type.
-/// So, every type implementing the `Termination` trait has to be converted
-/// to an integer.
-///
-/// The default implementations are returning `libc::EXIT_SUCCESS` to indicate
-/// a successful execution. In case of a failure, `libc::EXIT_FAILURE` is returned.
-#[cfg_attr(not(test), lang = "termination")]
-#[unstable(feature = "termination_trait", issue = "43301")]
-#[rustc_on_unimplemented =
- "`main` can only return types that implement {Termination}, not `{Self}`"]
-pub trait Termination {
- /// Is called to get the representation of the value as status code.
- /// This status code is returned to the operating system.
- fn report(self) -> i32;
-}
-
-#[unstable(feature = "termination_trait", issue = "43301")]
-impl Termination for () {
- fn report(self) -> i32 { exit::SUCCESS }
-}
-
-#[unstable(feature = "termination_trait", issue = "43301")]
-impl<T: Termination, E: Error> Termination for Result<T, E> {
- fn report(self) -> i32 {
- match self {
- Ok(val) => val.report(),
- Err(err) => {
- print_error(err);
- exit::FAILURE
- }
- }
- }
-}
-
-#[unstable(feature = "termination_trait", issue = "43301")]
-fn print_error<E: Error>(err: E) {
- eprintln!("Error: {}", err.description());
-
- if let Some(ref err) = err.cause() {
- eprintln!("Caused by: {}", err.description());
- }
-}
-
-#[unstable(feature = "termination_trait", issue = "43301")]
-impl Termination for ! {
- fn report(self) -> i32 { unreachable!(); }
-}
-
-#[unstable(feature = "termination_trait", issue = "43301")]
-impl Termination for bool {
- fn report(self) -> i32 {
- if self { exit::SUCCESS } else { exit::FAILURE }
- }
-}
-
-#[unstable(feature = "termination_trait", issue = "43301")]
-impl Termination for i32 {
- fn report(self) -> i32 {
- self
- }
-}