linker

type Link ¶

type Link[T comparable, I any] struct {
	Key   T
	Value I
}

func NewLink[T comparable, I any](key T, value I) *Link[T, I]

type Linker ¶

type Linker[T comparable, I any] struct {
	// contains filtered or unexported fields
}

Linker stores typed values (I) indexed by keys of type T. It combines a Mapper for case-insensitive string lookups with a direct key→value map, allowing access both by string name and by typed key.

This is useful for plugin systems, strategy patterns, or any scenario where you need to select implementations by name while maintaining type safety.

Example:

//go:generate stringer -type=Driver

type Driver uint8
const (
    Postgres Driver = 0
    MySQL    Driver = 1
)

linker := NewLinker(
    NewLink(Postgres, &PGDriver{}),
    NewLink(MySQL, &MySQLDriver{}),
)
driver, _ := linker.GetByName("postgres") // returns &PGDriver{}

func NewLinker[T comparable, I any](links ...*Link[T, I]) *Linker[T, I]

func (linker *Linker[T, I]) Add(key T, value I)

func (linker *Linker[T, I]) All() iter.Seq2[T, I]

func (linker *Linker[T, I]) Get(key T) (I, error)

func (linker *Linker[T, I]) GetOrDefault(key T, d I) I

func (linker *Linker[T, I]) Has(key T) bool

func (linker *Linker[T, I]) Keys() []T

func (linker *Linker[T, I]) Len() int

func (linker *Linker[T, I]) Remove(key T)