1 files changed, 15 insertions, 0 deletions
diff --git a/vendor/dialoguer/src/history.rs b/vendor/dialoguer/src/history.rs
new file mode 100644
index 0000000..d0818cc
--- /dev/null
+++ b/vendor/dialoguer/src/history.rs
@@ -0,0 +1,15 @@
+/// Trait for history handling.
+pub trait History<T> {
+    /// This is called with the current position that should
+    /// be read from history. The `pos` represents the number
+    /// of times the `Up`/`Down` arrow key has been pressed.
+    /// This would normally be used as an index to some sort
+    /// of vector.  If the `pos` does not have an entry, [`None`](Option::None)
+    /// should be returned.
+    fn read(&self, pos: usize) -> Option<String>;
+
+    /// This is called with the next value you should store
+    /// in history at the first location. Normally history
+    /// is implemented as a FIFO queue.
+    fn write(&mut self, val: &T);
+}