diff options
Diffstat (limited to 'src/test')
| -rw-r--r-- | src/test/mir-opt/storage_ranges.rs | 2 | ||||
| -rw-r--r-- | src/test/run-pass/mir_drop_order.rs | 42 |
2 files changed, 43 insertions, 1 deletions
diff --git a/src/test/mir-opt/storage_ranges.rs b/src/test/mir-opt/storage_ranges.rs index 933bfa8df2e..c63db741e5a 100644 --- a/src/test/mir-opt/storage_ranges.rs +++ b/src/test/mir-opt/storage_ranges.rs @@ -31,8 +31,8 @@ fn main() { // _3 = &_4; // StorageDead(_5); // _2 = (); -// StorageDead(_4); // StorageDead(_3); +// StorageDead(_4); // StorageLive(_6); // _6 = const 1i32; // _0 = (); diff --git a/src/test/run-pass/mir_drop_order.rs b/src/test/run-pass/mir_drop_order.rs new file mode 100644 index 00000000000..55ac5ca067b --- /dev/null +++ b/src/test/run-pass/mir_drop_order.rs @@ -0,0 +1,42 @@ +// 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. + +use std::cell::RefCell; + +pub struct DropLogger<'a> { + id: usize, + log: &'a RefCell<Vec<usize>> +} + +impl<'a> Drop for DropLogger<'a> { + fn drop(&mut self) { + self.log.borrow_mut().push(self.id); + } +} + +fn main() { + let log = RefCell::new(vec![]); + let d = |id| DropLogger { id: id, log: &log }; + let get = || -> Vec<_> { + let mut m = log.borrow_mut(); + let n = m.drain(..); + n.collect() + }; + + { + let _x = (d(0), &d(1), d(2), &d(3)); + // all borrows are extended - nothing has been dropped yet + assert_eq!(get(), vec![]); + } + // in a let-statement, extended lvalues are dropped + // *after* the let result (tho they have the same scope + // as far as scope-based borrowck goes). + assert_eq!(get(), vec![0, 2, 3, 1]); +} |
