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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.
// compile-flags: -Z borrowck=compare
#![feature(generators, generator_trait)]
use std::ops::{GeneratorState, Generator};
use std::cell::Cell;
unsafe fn borrow_local_inline() {
// Not OK to yield with a borrow of a temporary.
//
// (This error occurs because the region shows up in the type of
// `b` and gets extended by region inference.)
let mut b = move || {
let a = &mut 3;
//~^ ERROR borrow may still be in use when generator yields (Ast)
//~| ERROR borrow may still be in use when generator yields (Mir)
yield();
println!("{}", a);
};
b.resume();
}
unsafe fn borrow_local_inline_done() {
// No error here -- `a` is not in scope at the point of `yield`.
let mut b = move || {
{
let a = &mut 3;
}
yield();
};
b.resume();
}
unsafe fn borrow_local() {
// Not OK to yield with a borrow of a temporary.
//
// (This error occurs because the region shows up in the type of
// `b` and gets extended by region inference.)
let mut b = move || {
let a = 3;
{
let b = &a;
//~^ ERROR borrow may still be in use when generator yields (Ast)
//~| ERROR borrow may still be in use when generator yields (Mir)
yield();
println!("{}", b);
}
};
b.resume();
}
fn main() { }
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