[clang-format] Handle C# 9 `init` accessor specifier.

Before, the code:
```
int Value { get; } = 0;
int Value { init; } = 0;
```
was formatted incoherently:
```
int Value { get; } = 0;
int Value { init; }
= 0;
```
because `init` was not recognised as an accessor specifier.

Reviewed By: MyDeveloperDay, HazardyKnusperkeks

Differential Revision: https://reviews.llvm.org/D121132

1 files changed, 14 insertions, 0 deletions

diff --git a/clang/unittests/Format/FormatTestCSharp.cpp b/clang/unittests/Format/FormatTestCSharp.cpp
index 26c62c1..2a76420 100644
--- a/clang/unittests/Format/FormatTestCSharp.cpp
+++ b/clang/unittests/Format/FormatTestCSharp.cpp
@@ -960,9 +960,11 @@ TEST_F(FormatTestCSharp, CSharpPropertyAccessors) {
   verifyFormat("int Value { get; } = 0", Style);
   verifyFormat("int Value { set }", Style);
   verifyFormat("int Value { set; }", Style);
+  verifyFormat("int Value { init; }", Style);
   verifyFormat("int Value { internal set; }", Style);
   verifyFormat("int Value { set; } = 0", Style);
   verifyFormat("int Value { get; set }", Style);
+  verifyFormat("int Value { get; init; }", Style);
   verifyFormat("int Value { set; get }", Style);
   verifyFormat("int Value { get; private set; }", Style);
   verifyFormat("int Value { get; set; }", Style);
@@ -976,6 +978,18 @@ public string Name {
   set => _name = value;
 })",
                Style);
+  verifyFormat(R"(//
+public string Name {
+  init => _name = value;
+  get => _name;
+})",
+               Style);
+  verifyFormat(R"(//
+public string Name {
+  set => _name = value;
+  get => _name;
+})",
+               Style);
 
   // Examples taken from
   // https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/classes-and-structs/properties