// Copyright 2022 The Dawn Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package container

// key is the constraint for container keys.
// As Map and Set sort before returning a slice, the constraint is equivalent to
// the constraints.Ordered in x/exp, instead of 'comparable':
// https://cs.opensource.google/go/x/exp/+/master:constraints/constraints.go
type key interface {
	~int | ~int8 | ~int16 | ~int32 | ~int64 | ~uint | ~uint8 | ~uint16 |
		~uint32 | ~uint64 | ~uintptr | ~float32 | ~float64 | ~string
}