Add test

generic.go

@@ -1,11 +1,14 @@
+//go:build go1.18
+// +build go1.18
+
 package pointer
 
 func To[T any](t T) *T {
 	return &t
 }
 
 func ToOrNil[T comparable](t T) *T {
-	if z, ok := interface{}(t).(interface{ IsZero() bool }); ok {
+	if z, ok := any(t).(interface{ IsZero() bool }); ok {
 		if z.IsZero() {
 			return nil
 		}

generic_test.go

@@ -0,0 +1,33 @@
+//go:build go1.18
+// +build go1.18
+
+package pointer
+
+import (
+	"testing"
+	"time"
+)
+
+func TestGeneric(t *testing.T) {
+	var x time.Time
+	if *To(x) != x {
+		t.Errorf("*To(%v)", x)
+	}
+	if ToOrNil(x) != nil {
+		t.Errorf("ToOrNil(%v)", x)
+	}
+	if Get((*time.Time)(nil)) != x {
+		t.Errorf("Time(%v)", nil)
+	}
+
+	x = time.Date(2014, 6, 25, 12, 24, 40, 0, time.UTC)
+	if *To(x) != x {
+		t.Errorf("*To(%v)", x)
+	}
+	if *ToOrNil(x) != x {
+		t.Errorf("*ToOrNil(%v)", x)
+	}
+	if Get(&x) != x {
+		t.Errorf("Get(%v)", &x)
+	}
+}

go.mod

@@ -1,3 +1,3 @@
 module github.com/AlekSi/pointer
 
-go 1.11
+go 1.18