1 files changed, 48 insertions, 0 deletions
diff --git a/vendor/askama/src/helpers.rs b/vendor/askama/src/helpers.rs
new file mode 100644
index 000000000..79a1ada20
--- /dev/null
+++ b/vendor/askama/src/helpers.rs
@@ -0,0 +1,48 @@
+use std::iter::{Enumerate, Peekable};
+
+pub struct TemplateLoop<I>
+where
+    I: Iterator,
+{
+    iter: Peekable<Enumerate<I>>,
+}
+
+impl<I> TemplateLoop<I>
+where
+    I: Iterator,
+{
+    #[inline]
+    pub fn new(iter: I) -> Self {
+        TemplateLoop {
+            iter: iter.enumerate().peekable(),
+        }
+    }
+}
+
+impl<I> Iterator for TemplateLoop<I>
+where
+    I: Iterator,
+{
+    type Item = (<I as Iterator>::Item, LoopItem);
+
+    #[inline]
+    fn next(&mut self) -> Option<(<I as Iterator>::Item, LoopItem)> {
+        self.iter.next().map(|(index, item)| {
+            (
+                item,
+                LoopItem {
+                    index,
+                    first: index == 0,
+                    last: self.iter.peek().is_none(),
+                },
+            )
+        })
+    }
+}
+
+#[derive(Copy, Clone)]
+pub struct LoopItem {
+    pub index: usize,
+    pub first: bool,
+    pub last: bool,
+}