// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package proto

import (
	"errors"

	"github.com/golang/protobuf/v2/reflect/protoreflect"
	"github.com/golang/protobuf/v2/runtime/protoiface"
)

// Message is the top-level interface that all messages must implement.
type Message = protoreflect.ProtoMessage

// errInternalNoFast indicates that fast-path operations are not available for a message.
var errInternalNoFast = errors.New("proto: BUG: internal error (errInternalNoFast)")

func protoMethods(m Message) *protoiface.Methods {
	if x, ok := m.(protoiface.Methoder); ok {
		return x.XXX_Methods()
	}
	return nil
}