Adding upstream version 9.0.3.

Signed-off-by: Daniel Baumann <daniel@debian.org>

1 files changed, 45 insertions, 0 deletions

diff --git a/modules/optional/option.go b/modules/optional/option.go
new file mode 100644
index 0000000..af9e5ac
--- /dev/null
+++ b/modules/optional/option.go
@@ -0,0 +1,45 @@
+// Copyright 2024 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package optional
+
+type Option[T any] []T
+
+func None[T any]() Option[T] {
+	return nil
+}
+
+func Some[T any](v T) Option[T] {
+	return Option[T]{v}
+}
+
+func FromPtr[T any](v *T) Option[T] {
+	if v == nil {
+		return None[T]()
+	}
+	return Some(*v)
+}
+
+func FromNonDefault[T comparable](v T) Option[T] {
+	var zero T
+	if v == zero {
+		return None[T]()
+	}
+	return Some(v)
+}
+
+func (o Option[T]) Has() bool {
+	return o != nil
+}
+
+func (o Option[T]) Value() T {
+	var zero T
+	return o.ValueOrDefault(zero)
+}
+
+func (o Option[T]) ValueOrDefault(v T) T {
+	if o.Has() {
+		return o[0]
+	}
+	return v
+}