ec7c800d2f
This commit removes pretty-expanded from all tests that wind up calling panic! one way or another now that its internals are unstable.
48 lines
1.1 KiB
Rust
48 lines
1.1 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.
|
|
|
|
// Check that a trait is still object-safe (and usable) if it has
|
|
// generic methods so long as they require `Self : Sized`.
|
|
|
|
|
|
trait Counter {
|
|
fn tick(&mut self) -> u32;
|
|
fn with<F:FnOnce(u32)>(&self, f: F) where Self : Sized;
|
|
}
|
|
|
|
struct CCounter {
|
|
c: u32
|
|
}
|
|
|
|
impl Counter for CCounter {
|
|
fn tick(&mut self) -> u32 { self.c += 1; self.c }
|
|
fn with<F:FnOnce(u32)>(&self, f: F) { f(self.c); }
|
|
}
|
|
|
|
fn tick1<C:Counter>(c: &mut C) {
|
|
tick2(c);
|
|
c.with(|i| ());
|
|
}
|
|
|
|
fn tick2(c: &mut Counter) {
|
|
tick3(c);
|
|
}
|
|
|
|
fn tick3<C:?Sized+Counter>(c: &mut C) {
|
|
c.tick();
|
|
c.tick();
|
|
}
|
|
|
|
fn main() {
|
|
let mut c = CCounter { c: 0 };
|
|
tick1(&mut c);
|
|
assert_eq!(c.tick(), 3);
|
|
}
|