Merge pull request #25 from m110/pointer-or-nil

Option: Add PointerOrNil

option.go

@@ -173,6 +173,16 @@ func (o Option[T]) FlatMap(mapper func(value T) Option[T]) Option[T] {
 	return None[T]()
 }
 
+// PointerOrNil returns value if present or a nil pointer.
+// Play: TODO
+func (o Option[T]) PointerOrNil() *T {
+	if !o.isPresent {
+		return nil
+	}
+
+	return &o.value
+}
+
 // MarshalJSON encodes Option into json.
 func (o Option[T]) MarshalJSON() ([]byte, error) {
 	if o.isPresent {

option_test.go

@@ -116,6 +116,16 @@ func TestOptionOrEmpty(t *testing.T) {
 	is.Equal(0, None[int]().OrEmpty())
 }
 
+func TestOptionPointerOrNil(t *testing.T) {
+	is := assert.New(t)
+
+	p := Some(42).PointerOrNil()
+	is.NotNil(p)
+	is.Equal(42, *p)
+
+	is.Nil(None[int]().PointerOrNil())
+}
+
 func TestOptionForEach(t *testing.T) {
 	is := assert.New(t)