Function SortMaps

cmp/cmpopts/sort.go:100–107

SortMaps returns a [cmp.Transformer] option that flattens map[K]V types to be a sorted []struct{K, V}. The less function must be of the form "func(T, T) bool" which is used to sort any map with key K that is assignable to T. Flattening the map into a slice has the property that [cmp.Equal] is able

(lessFunc interface{})

//
// SortMaps can be used in conjunction with [EquateEmpty].
func SortMaps(lessFunc interface{}) cmp.Option {
	vf := reflect.ValueOf(lessFunc)
	if !function.IsType(vf.Type(), function.Less) || vf.IsNil() {
		panic(fmt.Sprintf("invalid less function: %T", lessFunc))
	}
	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