Add iterator All() support (for Go >= 1.23)

iter.go

@@ -0,0 +1,15 @@
+//go:build go1.23
+
+package orderedmap
+
+import "iter"
+
+func (o *OrderedMap) All() iter.Seq2[string, any] {
+	return func(yield func(key string, value any) bool) {
+		for _, key := range o.keys {
+			if !yield(key, o.values[key]) {
+				break
+			}
+		}
+	}
+}

iter_test.go

@@ -0,0 +1,36 @@
+//go:build go1.23
+
+package orderedmap
+
+import "testing"
+
+func TestAll(t *testing.T) {
+	o := New()
+	o.Set("one", 1)
+	o.Set("two", 2)
+	o.Set("break", 3)
+	o.Set("four", 4)
+
+	expectedKeys := []string{"one", "two", "break"}
+	expectedValues := map[string]any{
+		"one":   1,
+		"two":   2,
+		"break": 3,
+	}
+	i := 0
+	for k, v := range o.All() {
+		if k != expectedKeys[i] {
+			t.Error("Expected key", expectedKeys[i], "but got", k)
+		}
+		if v != expectedValues[k] {
+			t.Error("Expected value", expectedValues[k], "but got", v)
+		}
+		i++
+		if k == "break" {
+			break
+		}
+	}
+	if i != len(expectedKeys) {
+		t.Error("Expected number of elements", len(expectedKeys), "but got", i)
+	}
+}