Function SortMaps

cmp/cmpopts/sort.go:119–126

SortMaps returns a [cmp.Transformer] option that flattens map[K]V types to be a sorted []struct{K, V}. The lessOrCompareFunc function must be either a less function of the form "func(T, T) bool" or a compare function of the format "func(T, T) int" which is used to sort any map with key K that is ass

(lessOrCompareFunc interface{})

//
// SortMaps can be used in conjunction with [EquateEmpty].
func SortMaps(lessOrCompareFunc interface{}) cmp.Option {
	vf := reflect.ValueOf(lessOrCompareFunc)
	if (!function.IsType(vf.Type(), function.Less) && !function.IsType(vf.Type(), function.Compare)) || vf.IsNil() {
		panic(fmt.Sprintf("invalid less or compare function: %T", lessOrCompareFunc))
	}
	ms := mapSorter{vf.Type().In(0), vf}
	return cmp.FilterValues(ms.filter, cmp.Transformer("cmpopts.SortMaps", ms.sort))
}

type mapSorter struct {
	in  reflect.Type  // T