rust/src/test/run-pass/borrowck-uniq-via-ref.rs

// Copyright 2012 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.

struct Rec {
    f: ~int,
}

struct Outer {
    f: Inner
}

struct Inner {
    g: Innermost
}

struct Innermost {
    h: ~int,
}

fn borrow(_v: &int) {}

fn box_mut(v: &mut ~int) {
    borrow(*v); // OK: &mut -> &imm
}

fn box_mut_rec(v: &mut Rec) {
    borrow(v.f); // OK: &mut -> &imm
}

fn box_mut_recs(v: &mut Outer) {
    borrow(v.f.g.h); // OK: &mut -> &imm
}

fn box_imm(v: &~int) {
    borrow(*v); // OK
}

fn box_imm_rec(v: &Rec) {
    borrow(v.f); // OK
}

fn box_imm_recs(v: &Outer) {
    borrow(v.f.g.h); // OK
}

pub fn main() {
}