From cb94fae03bff20b7ef5d38d1e3e8c356d82d0098 Mon Sep 17 00:00:00 2001
From: Luuk Machielse <luuk.machielse@gmail.com>
Date: Fri, 10 Oct 2025 19:58:08 +0200
Subject: [PATCH] Added `Empty(T)` and `Iter(T).empty`

---
 src/root.zig | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/src/root.zig b/src/root.zig
index cfb472f..7b843e3 100644
--- a/src/root.zig
+++ b/src/root.zig
@@ -19,6 +19,10 @@ pub fn Iter(comptime T: type) type {
         pub fn once(value: T) Iterator(Once(T)) {
             return .{ .inner = .{ .value = value } };
         }
+
+        pub fn empty() Iterator(Empty(T)) {
+            return .{ .inner = .{} };
+        }
     };
 }
 
@@ -367,3 +371,21 @@ pub fn SliceIterConst(comptime T: type) type {
         }
     };
 }
+
+pub fn Empty(comptime T: type) type {
+    return struct {
+        pub const Item = T;
+
+        pub fn next(_: Empty(T)) ?Item {
+            return null;
+        }
+    };
+}
+
+test Empty {
+    const testing = @import("std").testing;
+
+    var it = Iter(i32).empty();
+
+    try testing.expectEqual(null, it.next());
+}