// Copyright 2022 The Gitea Authors. All rights reserved.// SPDX-License-Identifier: MIT package container import (	"iter"	"maps") type Set[T comparable] map[T]struct{} // SetOf creates a set and adds the specified elements to it.func SetOf[T comparable](values ...T) Set[T] {	s := make(Set[T], len(values))	s.AddMultiple(values...)	return s} // Add adds the specified element to a set.// Returns true if the element is added; false if the element is already present.func (s Set[T]) Add(value T) bool {	if _, has := s[value]; !has {		s[value] = struct{}{}		return true	}	return false} // AddMultiple adds the specified elements to a set.func (s Set[T]) AddMultiple(values ...T) {	for _, value := range values {		s.Add(value)	}} func (s Set[T]) IsSubset(subset []T) bool {	for _, v := range subset {		if !s.Contains(v) {			return false		}	}	return true} // Contains determines whether a set contains the specified element.// Returns true if the set contains the specified element; otherwise, false.func (s Set[T]) Contains(value T) bool {	_, has := s[value]	return has} // Remove removes the specified element.// Returns true if the element is successfully found and removed; otherwise, false.func (s Set[T]) Remove(value T) bool {	if _, has := s[value]; has {		delete(s, value)		return true	}	return false} // Values gets a list of all elements in the set.func (s Set[T]) Values() []T {	keys := make([]T, 0, len(s))	for k := range s {		keys = append(keys, k)	}	return keys} // Seq returns a iterator over the elements in the set.// It returns a single-use iterator.func (s Set[T]) Seq() iter.Seq[T] {	return maps.Keys(s)} // Clone returns a identical shallow copy of this set.func (s Set[T]) Clone() Set[T] {	return maps.Clone(s)} // Computes the elements that are in this set, that aren't in the other set.func (s Set[T]) Difference(other Set[T]) Set[T] {	result := make(Set[T])	for key := range s {		if !other.Contains(key) {			result.Add(key)		}	}	return result} func (s Set[T]) Slice() []T {	retval := make([]T, 0, len(s))	for key := range s {		retval = append(retval, key)	}	return retval}