From d4dcfdb5ee72d36bdfab22df5c71a51daac69fea Mon Sep 17 00:00:00 2001
From: Meghan Denny <hello@nektro.net>
Date: Tue, 21 Apr 2026 21:56:16 -0700
Subject: [PATCH] add compareFnSlice

---
 src/compareFnSlice.zig | 22 ++++++++++++++++++++++
 src/lib.zig            |  1 +
 2 files changed, 23 insertions(+)
 create mode 100644 src/compareFnSlice.zig

diff --git a/src/compareFnSlice.zig b/src/compareFnSlice.zig
new file mode 100644
index 0000000000000000000000000000000000000000..436e3fe5cb0c9f44e3fe2ad1d03f302e9b2a0728
--- /dev/null
+++ b/src/compareFnSlice.zig
@@ -0,0 +1,22 @@
+const std = @import("std");
+const extras = @import("./lib.zig");
+
+// Remove after updating to Zig 0.17. Ref: https://codeberg.org/ziglang/zig/pulls/32010
+pub fn compareFnSlice(comptime T: type) fn ([]const T, []const T) std.math.Order {
+    const S = struct {
+        fn order(lhs: []const T, rhs: []const T) std.math.Order {
+            if (lhs.ptr != rhs.ptr) {
+                const n = @min(lhs.len, rhs.len);
+                for (lhs[0..n], rhs[0..n]) |lhs_elem, rhs_elem| {
+                    switch (std.math.order(lhs_elem, rhs_elem)) {
+                        .eq => continue,
+                        .lt => return .lt,
+                        .gt => return .gt,
+                    }
+                }
+            }
+            return std.math.order(lhs.len, rhs.len);
+        }
+    };
+    return S.order;
+}
diff --git a/src/lib.zig b/src/lib.zig
index 1ef0e476df96b6c6459235f0f184067edb53dbc0..e555c5989acee0b69ec6ffe983379ee9ba7e2f7a 100644
--- a/src/lib.zig
+++ b/src/lib.zig
@@ -121,3 +121,4 @@ pub usingnamespace @import("./asciiLower.zig");
 pub usingnamespace @import("./parseDigits.zig");
 pub usingnamespace @import("./from_hex.zig");
 pub usingnamespace @import("./Pointee.zig");
+pub usingnamespace @import("./compareFnSlice.zig");
-- 
2.54.0