1 files changed, 48 insertions, 0 deletions
diff --git a/src/std/order.gleam b/src/std/order.gleam
new file mode 100644
index 0000000..4d39705
--- /dev/null
+++ b/src/std/order.gleam
@@ -0,0 +1,48 @@
+pub enum Order =
+  | Lt
+  | Eq
+  | Gt
+;
+
+pub fn reverse(order) {
+  case order {
+  | Lt -> Gt
+  | Eq -> Eq
+  | Gt -> Lt
+  }
+}
+
+pub fn to_int(order) {
+  case order {
+  | Lt -> -1
+  | Eq -> 0
+  | Gt -> 1
+  }
+}
+
+pub fn compare(a, b) {
+  case {a, b} {
+  | {Lt, Lt} -> Eq
+  | {Lt, _} -> Lt
+  | {Eq, Eq} -> Eq
+  | {Gt, Gt} -> Eq
+  | {Eq, Gt} -> Lt
+  | _ -> Gt
+  }
+}
+
+pub fn max(a, b) {
+  case {a, b} {
+  | {Gt, _} -> Gt
+  | {Eq, Lt} -> Eq
+  | _ -> b
+  }
+}
+
+pub fn min(a, b) {
+  case {a, b} {
+  | {Lt, _} -> Lt
+  | {Eq, Gt} -> Eq
+  | _ -> b
+  }
+}