rust/src/test/compile-fail/lint-unused-extern-crate.rs
Alex Crichton fcd05ed99f time: Deprecate the library in the distribution
This commit deprecates the entire libtime library in favor of the
externally-provided libtime in the rust-lang organization. Users of the
`libtime` crate as-is today should add this to their Cargo manifests:

    [dependencies.time]
    git = "https://github.com/rust-lang/time"

To implement this transition, a new function `Duration::span` was added to the
`std::time::Duration` time. This function takes a closure and then returns the
duration of time it took that closure to execute. This interface will likely
improve with `FnOnce` unboxed closures as moving in and out will be a little
easier.

Due to the deprecation of the in-tree crate, this is a:

[breaking-change]

cc #18855, some of the conversions in the `src/test/bench` area may have been a
little nicer with that implemented
2014-11-12 09:18:35 -08:00

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1.0 KiB
Rust

// Copyright 2014 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.
// aux-build:lint-unused-extern-crate.rs
#![feature(globs)]
#![deny(unused_extern_crates)]
#![allow(unused_variables)]
extern crate libc; //~ ERROR: unused extern crate
extern crate "collections" as collecs; // no error, it is used
extern crate rand; // no error, the use marks it as used
// even if imported objects aren't used
extern crate "lint-unused-extern-crate" as other; // no error, the use * marks it as used
#[allow(unused_imports)]
use rand::isaac::IsaacRng;
use other::*;
fn main() {
let x: collecs::vec::Vec<uint> = Vec::new();
let y = foo();
}