From 0978f6b3a54a878e3a7182fd500db65639775423 Mon Sep 17 00:00:00 2001
From: Ben Barham <ben_barham@apple.com>
Date: Wed, 20 Sep 2023 17:00:43 -0700
Subject: [PATCH] Do not add whitespace between right angle and period

`Foo<T>.bar` should not have whitespace added between `>` and `.`.
---
 Sources/SwiftBasicFormat/BasicFormat.swift        | 1 +
 Tests/SwiftBasicFormatTest/BasicFormatTests.swift | 7 +++++++
 2 files changed, 8 insertions(+)

diff --git a/Sources/SwiftBasicFormat/BasicFormat.swift b/Sources/SwiftBasicFormat/BasicFormat.swift
index 3b277e42d5b..30c4e55c9d9 100644
--- a/Sources/SwiftBasicFormat/BasicFormat.swift
+++ b/Sources/SwiftBasicFormat/BasicFormat.swift
@@ -334,6 +334,7 @@ open class BasicFormat: SyntaxRewriter {
       (.regexLiteralPattern, _),
       (.regexSlash, .regexPoundDelimiter),  // closing extended regex delimiter should never be separate by a space
       (.rightAngle, .leftParen),  // func foo<T>(x: T)
+      (.rightAngle, .period),  // Foo<T>.bar
       (.rightBrace, .leftParen),  // { return 1 }()
       (.rightParen, .leftParen),  // returnsClosure()()
       (.rightParen, .period),  // foo().bar
diff --git a/Tests/SwiftBasicFormatTest/BasicFormatTests.swift b/Tests/SwiftBasicFormatTest/BasicFormatTests.swift
index 5a11a387663..7dd65b7cc2b 100644
--- a/Tests/SwiftBasicFormatTest/BasicFormatTests.swift
+++ b/Tests/SwiftBasicFormatTest/BasicFormatTests.swift
@@ -531,4 +531,11 @@ final class BasicFormatTest: XCTestCase {
       )
     }
   }
+
+  func testRightAnglePeriodNotFormatted() {
+    assertFormatted(
+      tree: ExprSyntax("Foo<T>.bar"),
+      expected: "Foo<T>.bar"
+    )
+  }
 }