From 963a8c0d368fd95131d147b68be6770e1dead5e1 Mon Sep 17 00:00:00 2001
From: Alex Hoppen <ahoppen@apple.com>
Date: Tue, 25 Apr 2023 15:11:41 -0700
Subject: [PATCH] Add a compatibility layer for SwiftSyntax

When renaming methods this new file can contain deprecated declarations to keep clients building.
---
 Sources/SwiftSyntax/CMakeLists.txt            |  1 +
 .../SwiftSyntaxCompatibility.swift            | 21 +++++++++++++++++++
 utils/group.json                              |  1 +
 3 files changed, 23 insertions(+)
 create mode 100644 Sources/SwiftSyntax/SwiftSyntaxCompatibility.swift

diff --git a/Sources/SwiftSyntax/CMakeLists.txt b/Sources/SwiftSyntax/CMakeLists.txt
index 117fd67368e..66cb0a96043 100644
--- a/Sources/SwiftSyntax/CMakeLists.txt
+++ b/Sources/SwiftSyntax/CMakeLists.txt
@@ -18,6 +18,7 @@ add_swift_host_library(SwiftSyntax
   SourceLength.swift
   SourceLocation.swift
   SourcePresence.swift
+  SwiftSyntaxCompatibility.swift
   Syntax.swift
   SyntaxArena.swift
   SyntaxChildren.swift
diff --git a/Sources/SwiftSyntax/SwiftSyntaxCompatibility.swift b/Sources/SwiftSyntax/SwiftSyntaxCompatibility.swift
new file mode 100644
index 00000000000..4c7239cfbe3
--- /dev/null
+++ b/Sources/SwiftSyntax/SwiftSyntaxCompatibility.swift
@@ -0,0 +1,21 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2014 - 2023 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
+
+// This file provides compatiblity aliases to keep dependents of SwiftSyntax building.
+// All users of the declarations in this file should transition away from them ASAP.
+
+public extension DeclGroupSyntax {
+  @available(*, deprecated, renamed: "memberBlock")
+  var members: MemberDeclBlockSyntax {
+    return self.memberBlock
+  }
+}
diff --git a/utils/group.json b/utils/group.json
index ba6bb56be3b..ebefbc61788 100644
--- a/utils/group.json
+++ b/utils/group.json
@@ -62,5 +62,6 @@
     "SyntaxVerifier.swift",
     "BumpPtrAllocator.swift",
     "PlatformMutex.swift",
+    "SwiftSyntaxCompatibility.swift",
   ]
 }