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Implement Debug for std::vec::IntoIter.

Display all the remaining items of the iterator, similar to the `Debug`
implementation for `core::slice::Iter`:

f0bab98695/src/libcore/slice.rs (L930-L937)

Using the `as_slice` method that was added in:

https://github.com/rust-lang/rust/pull/35447
This commit is contained in:
Corey Farwell 2016-08-15 23:45:12 -04:00
parent f0bab98695
commit bc52bdcedc
2 changed files with 17 additions and 0 deletions

View file

@ -1713,6 +1713,15 @@ pub struct IntoIter<T> {
end: *const T,
}
#[stable(feature = "vec_intoiter_debug", since = "")]
impl<T: fmt::Debug> fmt::Debug for IntoIter<T> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.debug_tuple("IntoIter")
.field(&self.as_slice())
.finish()
}
}
impl<T> IntoIter<T> {
/// Returns the remaining items of this iterator as a slice.
///

View file

@ -501,6 +501,14 @@ fn test_into_iter_as_mut_slice() {
assert_eq!(into_iter.as_slice(), &['y', 'c']);
}
#[test]
fn test_into_iter_debug() {
let vec = vec!['a', 'b', 'c'];
let into_iter = vec.into_iter();
let debug = format!("{:?}", into_iter);
assert_eq!(debug, "IntoIter(['a', 'b', 'c'])");
}
#[test]
fn test_into_iter_count() {
assert_eq!(vec![1, 2, 3].into_iter().count(), 3);