1 files changed, 44 insertions, 0 deletions
diff --git a/slices/cmp.go b/slices/cmp.go
new file mode 100644
index 0000000..fbf1934
--- /dev/null
+++ b/slices/cmp.go
@@ -0,0 +1,44 @@
+// Copyright 2023 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package slices
+
+import "golang.org/x/exp/constraints"
+
+// min is a version of the predeclared function from the Go 1.21 release.
+func min[T constraints.Ordered](a, b T) T {
+	if a < b || isNaN(a) {
+		return a
+	}
+	return b
+}
+
+// max is a version of the predeclared function from the Go 1.21 release.
+func max[T constraints.Ordered](a, b T) T {
+	if a > b || isNaN(a) {
+		return a
+	}
+	return b
+}
+
+// cmpLess is a copy of cmp.Less from the Go 1.21 release.
+func cmpLess[T constraints.Ordered](x, y T) bool {
+	return (isNaN(x) && !isNaN(y)) || x < y
+}
+
+// cmpCompare is a copy of cmp.Compare from the Go 1.21 release.
+func cmpCompare[T constraints.Ordered](x, y T) int {
+	xNaN := isNaN(x)
+	yNaN := isNaN(y)
+	if xNaN && yNaN {
+		return 0
+	}
+	if xNaN || x < y {
+		return -1
+	}
+	if yNaN || x > y {
+		return +1
+	}
+	return 0
+}