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This commit is contained in:
Aykhan Shahsuvarov 2024-11-23 16:13:17 +04:00
parent adc5a34891
commit ede74c17b2
1 changed files with 7 additions and 1 deletions
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8
utils/types.go
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@ -5,15 +5,19 @@ import (
"errors" "errors"
) )
// Don't call this struct directly, use NewOption[T] or NewNoneOption[T] instead.
type Option[T any] struct { type Option[T any] struct {
// value holds the actual value of the Option if it is not None.
value T value T
none bool // none indicates whether the Option is None (i.e., has no value).
none bool
} }
func (o *Option[T]) IsNone() bool { func (o *Option[T]) IsNone() bool {
return o.none return o.none
} }
// The returned value can be nil, if the Option is None, it will return nil and an error.
func (o *Option[T]) ValueOrErr() (*T, error) { func (o *Option[T]) ValueOrErr() (*T, error) {
if o.IsNone() { if o.IsNone() {
return nil, errors.New("Option is None") return nil, errors.New("Option is None")
@ -21,6 +25,7 @@ func (o *Option[T]) ValueOrErr() (*T, error) {
return &o.value, nil return &o.value, nil
} }
// The returned value can't be nil, if the Option is None, it will return the default value.
func (o *Option[T]) ValueOr(def *T) *T { func (o *Option[T]) ValueOr(def *T) *T {
if o.IsNone() { if o.IsNone() {
return def return def
@ -28,6 +33,7 @@ func (o *Option[T]) ValueOr(def *T) *T {
return &o.value return &o.value
} }
// The returned value can't be nil, if the Option is None, it will panic.
func (o *Option[T]) ValueOrPanic() *T { func (o *Option[T]) ValueOrPanic() *T {
if o.IsNone() { if o.IsNone() {
panic("Option is None") panic("Option is None")