1 files changed, 26 insertions, 0 deletions
diff --git a/src/tuice/key.rs b/src/tuice/key.rs
new file mode 100644
index 00000000..11e00ee5
--- /dev/null
+++ b/src/tuice/key.rs
@@ -0,0 +1,26 @@
+//! Code here is based on crochet's implementation - see
+//! [here](https://github.com/raphlinus/crochet/blob/master/src/key.rs) for more details!
+
+use std::hash::Hash;
+use std::panic::Location;
+
+/// A newtype around [`Location`].
+#[derive(Clone, Copy, Hash, Debug, PartialEq, Eq, PartialOrd, Ord)]
+pub struct Caller(&'static Location<'static>);
+
+/// A unique key built around using the [`Location`] given by
+/// `#[track_caller]` and a sequence index.
+#[derive(Clone, Copy, Hash, Debug, PartialEq, Eq, PartialOrd, Ord)]
+pub struct Key {
+    pub(crate) caller: Caller,
+    pub(crate) index: usize,
+}
+
+impl Key {
+    pub fn new(caller: impl Into<Caller>, index: usize) -> Self {
+        Self {
+            caller: caller.into(),
+            index,
+        }
+    }
+}