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// Copyright 2015 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 one cannot subvert Drop Check rule via a user-defined
// Clone implementation.
#![allow(unused_variables, unused_assignments)]
struct D<T:Copy>(T, &'static str);
#[derive(Copy)]
struct S<'a>(&'a D<i32>, &'static str);
impl<'a> Clone for S<'a> {
fn clone(&self) -> S<'a> {
println!("cloning `S(_, {})` and thus accessing: {}", self.1, (self.0).0);
S(self.0, self.1)
}
}
impl<T:Copy> Drop for D<T> {
fn drop(&mut self) {
println!("calling Drop for {}", self.1);
let _call = self.0.clone();
}
}
fn main() {
let (d2, d1);
d1 = D(34, "d1");
d2 = D(S(&d1, "inner"), "d2");
}
//~^^ ERROR `d1` does not live long enough
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