Function NewHasher

immutable.go:2241–2258

NewHasher returns the built-in hasher for a given key type.

(key K)

// NewHasher returns the built-in hasher for a given key type.
func NewHasher[K any](key K) Hasher[K] {
	// Attempt to use non-reflection based hasher first.
	switch (any(key)).(type) {
	case int, int8, int16, int32, int64, uint, uint8, uint16, uint32, uint64, uintptr, string:
		return &defaultHasher[K]{}
	}

	// Fallback to reflection-based hasher otherwise.
	// This is used when caller wraps a type around a primitive type.
	switch reflect.TypeOf(key).Kind() {
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr, reflect.String:
		return &reflectHasher[K]{}
	}

	// If no hashers match then panic.
	// This is a compile time issue so it should not return an error.
	panic(fmt.Sprintf("immutable.NewHasher: must set hasher for %T type", key))
}

// Hash returns a hash for value.
func hashString(value string) uint32 {