blob: 58372dd3485096a4ff4414f8b4fed722d9f5ce39 [file] [log] [blame]
mpagenkoaf801632020-07-03 10:00:42 +00001// Copyright 2018 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5// Package flags provides a set of flags controlled by build tags.
6package flags
7
8// ProtoLegacy specifies whether to enable support for legacy functionality
9// such as MessageSets, weak fields, and various other obscure behavior
10// that is necessary to maintain backwards compatibility with proto1 or
11// the pre-release variants of proto2 and proto3.
12//
13// This is disabled by default unless built with the "protolegacy" tag.
14//
15// WARNING: The compatibility agreement covers nothing provided by this flag.
16// As such, functionality may suddenly be removed or changed at our discretion.
17const ProtoLegacy = protoLegacy
18
19// LazyUnmarshalExtensions specifies whether to lazily unmarshal extensions.
20//
21// Lazy extension unmarshaling validates the contents of message-valued
22// extension fields at unmarshal time, but defers creating the message
23// structure until the extension is first accessed.
24const LazyUnmarshalExtensions = ProtoLegacy