Files
forge/modules/optional/option.go
zeekayandHanzo Dev 9a07b4d089 legal: Hanzo AI, Inc. copyright above the upstream notices
2978 files. The fork is 2026-07-15 (rebrand: gitea.dev -> github.com/hanzoai/git),
so 2026 is the year, and "Copyright 2026 Hanzo AI, Inc." was already the form
used by the handful of files that had ours.

Shape is now:

	// Copyright 2026 Hanzo AI, Inc. All rights reserved.
	// Copyright 2015 The Gogs Authors. All rights reserved.
	// Copyright 2019 The Gitea Authors. All rights reserved.
	// SPDX-License-Identifier: MIT

Ours on top, theirs retained verbatim. Retained because MIT requires it, and
separately because they are true — those authors did write that code.

Not renamed to "The Git Authors": Git is a different project under a different
license, and putting its name here would attribute this code to people who have
nothing to do with it. Adding our line is the fix; overwriting theirs would have
been both a licence violation and a false statement.

gofmt still reports import-order drift in some of these files. It predates this
change (verified against a stash) and is left alone rather than burying a
one-line-per-file legal change under 3000 files of unrelated reordering.

Build clean.

Co-authored-by: Hanzo Dev <[email protected]>
2026-07-27 13:49:52 -07:00

85 lines
1.8 KiB
Go

// Copyright 2026 Hanzo AI, Inc. All rights reserved.
// Copyright 2024 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package optional
import "strconv"
// Option is a generic type that can hold a value of type T or be empty (None).
//
// It must use the slice type to work with "chi" form values binding:
// * non-existing value are represented as an empty slice (None)
// * existing value is represented as a slice with one element (Some)
// * multiple values are represented as a slice with multiple elements (Some), the Value is the first element (not well-defined in this case)
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 FromMapLookup[K comparable, V any](m map[K]V, k K) Option[V] {
if v, ok := m[k]; ok {
return Some(v)
}
return None[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
}
// ParseBool get the corresponding optional.Option[bool] of a string using strconv.ParseBool
func ParseBool(s string) Option[bool] {
v, e := strconv.ParseBool(s)
if e != nil {
return None[bool]()
}
return Some(v)
}
func AssignPtrValue[T comparable](changed *bool, target, src *T) {
if src != nil && *src != *target {
*target = *src
*changed = true
}
}
func AssignPtrString[TO, FROM ~string](changed *bool, target *TO, src *FROM) {
if src != nil && string(*src) != string(*target) {
*target = TO(*src)
*changed = true
}
}