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generic.go
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generic.go
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package types
import "github.com/Cerebellum-Network/go-substrate-rpc-client/v9/scale"
type Option[T any] struct {
hasValue bool
value T
}
func NewOption[T any](t T) Option[T] {
return Option[T]{hasValue: true, value: t}
}
func NewEmptyOption[T any]() Option[T] {
return Option[T]{hasValue: false}
}
func (o *Option[T]) Decode(decoder scale.Decoder) error {
return decoder.DecodeOption(&o.hasValue, &o.value)
}
func (o Option[T]) Encode(encoder scale.Encoder) error {
return encoder.EncodeOption(o.hasValue, o.value)
}
// SetSome sets a value
func (o *Option[T]) SetSome(value T) {
o.hasValue = true
o.value = value
}
// SetNone removes a value and marks it as missing
func (o *Option[T]) SetNone() {
o.hasValue = false
var val T
o.value = val
}
// Unwrap returns a flag that indicates whether a value is present and the stored value
func (o *Option[T]) Unwrap() (ok bool, value T) {
return o.hasValue, o.value
}
func (o *Option[T]) HasValue() bool {
return o.hasValue
}