diff --git a/src/test/run-pass/for-loop-does-not-borrow-iterators.rs b/src/test/run-pass/for-loop-does-not-borrow-iterators.rs new file mode 100644 index 0000000000000..206ab0dfeb2d0 --- /dev/null +++ b/src/test/run-pass/for-loop-does-not-borrow-iterators.rs @@ -0,0 +1,30 @@ +// 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 or the MIT license +// , at your +// option. This file may not be copied, modified, or distributed +// except according to those terms. + + +// The `for` loop use to keep a mutable borrow when executing its body, +// making it impossible to re-use the iterator as follows. +// https://github.com/rust-lang/rust/issues/8372 +// +// This was fixed in https://github.com/rust-lang/rust/pull/15809 + +pub fn main() { + let mut for_loop_values = Vec::new(); + let mut explicit_next_call_values = Vec::new(); + + let mut iter = range(1i, 10); + for i in iter { + for_loop_values.push(i); + explicit_next_call_values.push(iter.next()); + } + + assert_eq!(for_loop_values, vec![1, 3, 5, 7, 9]); + assert_eq!(explicit_next_call_values, vec![Some(2), Some(4), Some(6), Some(8), None]); +}