[clang] [clang-format] Handle `import` when used as template function name (PR #169279)

[via cfe-commits]

https://github.com/owenca created https://github.com/llvm/llvm-project/pull/169279

Fixes #149960

>From 8031242e600e1b01b54b4d44d6a510467febfda6 Mon Sep 17 00:00:00 2001
From: Owen Pan <owenpiano at gmail.com>
Date: Sun, 23 Nov 2025 20:53:21 -0800
Subject: [PATCH] [clang-format] Handle `import` when used as template function
 name

Fixes #149960
---
 clang/lib/Format/TokenAnnotator.cpp   | 5 ++++-
 clang/unittests/Format/FormatTest.cpp | 1 +
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/clang/lib/Format/TokenAnnotator.cpp b/clang/lib/Format/TokenAnnotator.cpp
index 19c42c88762fb..200ee13901f4b 100644
--- a/clang/lib/Format/TokenAnnotator.cpp
+++ b/clang/lib/Format/TokenAnnotator.cpp
@@ -5033,8 +5033,11 @@ bool TokenAnnotator::spaceRequiredBefore(const AnnotatedLine &Line,
       return true;
     // Space between import <iostream>.
     // or import .....;
-    if (Left.is(Keywords.kw_import) && Right.isOneOf(tok::less, tok::ellipsis))
+    if (Left.is(Keywords.kw_import) &&
+        Right.isOneOf(tok::less, tok::ellipsis) &&
+        (!BeforeLeft || BeforeLeft->is(tok::kw_export))) {
       return true;
+    }
     // Space between `module :` and `import :`.
     if (Left.isOneOf(Keywords.kw_module, Keywords.kw_import) &&
         Right.is(TT_ModulePartitionColon)) {
diff --git a/clang/unittests/Format/FormatTest.cpp b/clang/unittests/Format/FormatTest.cpp
index 81fa7d1d11aa4..5a5d77075bb3a 100644
--- a/clang/unittests/Format/FormatTest.cpp
+++ b/clang/unittests/Format/FormatTest.cpp
@@ -27328,6 +27328,7 @@ TEST_F(FormatTest, Cpp20ModulesSupport) {
   verifyFormat("export", Style);
 
   verifyFormat("import /* not keyword */ = val ? 2 : 1;");
+  verifyFormat("_world->import<engine_module>();");
 }
 
 TEST_F(FormatTest, CoroutineForCoawait) {