Author: Owen Pan
Date: 2025-06-06T20:43:35-07:00
New Revision: 0c495ce9c4237f0f090b672efd94839e52cb5f18

URL: 
https://github.com/llvm/llvm-project/commit/0c495ce9c4237f0f090b672efd94839e52cb5f18
DIFF: 
https://github.com/llvm/llvm-project/commit/0c495ce9c4237f0f090b672efd94839e52cb5f18.diff

LOG: [clang-format] Handle function decls with MS calling conventions (#143083)

Added: 
    

Modified: 
    clang/lib/Format/TokenAnnotator.cpp
    clang/unittests/Format/TokenAnnotatorTest.cpp

Removed: 
    


################################################################################
diff  --git a/clang/lib/Format/TokenAnnotator.cpp 
b/clang/lib/Format/TokenAnnotator.cpp
index 37ab40ca97bff..aed1672afac66 100644
--- a/clang/lib/Format/TokenAnnotator.cpp
+++ b/clang/lib/Format/TokenAnnotator.cpp
@@ -1769,7 +1769,15 @@ class AnnotatingParser {
                        Keywords.kw___has_include_next)) {
         parseHasInclude();
       }
-      if (Style.isCSharp()) {
+      if (IsCpp) {
+        if (Next && Next->is(tok::l_paren) && Prev &&
+            Prev->isOneOf(tok::kw___cdecl, tok::kw___stdcall,
+                          tok::kw___fastcall, tok::kw___thiscall,
+                          tok::kw___regcall, tok::kw___vectorcall)) {
+          Tok->setFinalizedType(TT_FunctionDeclarationName);
+          Next->setFinalizedType(TT_FunctionDeclarationLParen);
+        }
+      } else if (Style.isCSharp()) {
         if (Tok->is(Keywords.kw_where) && Next && Next->isNot(tok::l_paren)) {
           Tok->setType(TT_CSharpGenericTypeConstraint);
           parseCSharpGenericTypeConstraint();

diff  --git a/clang/unittests/Format/TokenAnnotatorTest.cpp 
b/clang/unittests/Format/TokenAnnotatorTest.cpp
index 9d62ff8d39a77..d64e34de1fcf4 100644
--- a/clang/unittests/Format/TokenAnnotatorTest.cpp
+++ b/clang/unittests/Format/TokenAnnotatorTest.cpp
@@ -2273,6 +2273,11 @@ TEST_F(TokenAnnotatorTest, 
UnderstandsFunctionDeclarationNames) {
   EXPECT_TOKEN(Tokens[16], tok::l_paren, TT_FunctionDeclarationLParen);
   EXPECT_TOKEN(Tokens[18], tok::arrow, TT_TrailingReturnArrow);
 
+  Tokens = annotate("void __stdcall f();");
+  ASSERT_EQ(Tokens.size(), 7u) << Tokens;
+  EXPECT_TOKEN(Tokens[2], tok::identifier, TT_FunctionDeclarationName);
+  EXPECT_TOKEN(Tokens[3], tok::l_paren, TT_FunctionDeclarationLParen);
+
   Tokens = annotate("int iso_time(time_t);");
   ASSERT_EQ(Tokens.size(), 7u) << Tokens;
   EXPECT_TOKEN(Tokens[1], tok::identifier, TT_FunctionDeclarationName);


        
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