utils: provide IntoIterator for OldNew

I wanted this for a now-abandoned approach to something, but let us
keep it.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/src/utils.rs b/src/utils.rs
index bd79992d8f5964de5d1404f68cf931f8abf3161d..a062eb97cf6bc52ac1f5ac3c56f24df6d93b9e8f 100644 (file)
--- a/src/utils.rs
+++ b/src/utils.rs
@@ -77,6 +77,10 @@ impl<T> OldNew<T> {
   pub fn iter(&self) -> impl Iterator<Item=&T> {
     self.0.iter()
   }
+
+  pub fn into_iter(self) -> impl Iterator<Item=T> {
+    std::array::IntoIter::new(self.0)
+  }
 }
 
 impl<T> Index<OldNewIndex> for OldNew<T> {