[PATCH] D137223: [clang-format] Remove special case for kw_operator when aligning decls

[Emilia Dreamer via Phabricator via cfe-commits]

rymiel created this revision.
rymiel added reviewers: HazardyKnusperkeks, owenpan, MyDeveloperDay.
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This change breaks no existing tests but does fix the linked issue.
Declarations of operator overloads are annotated with
`TT_FunctionDeclarationName` on the `operator` keyword, which is already
being checked for when aligning, so the extra `kw_operator` doesn't seem
to be necessary. (just for reference, it was added in
rG92b397fb9d55ccdf4632c2b1b15b4a0ee417cf74 <https://reviews.llvm.org/rG92b397fb9d55ccdf4632c2b1b15b4a0ee417cf74> / 92b397fb9d55ccdf4632c2b1b15b4a0ee417cf74)

Fixes https://github.com/llvm/llvm-project/issues/55733


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D137223

Files:
  clang/lib/Format/WhitespaceManager.cpp
  clang/unittests/Format/FormatTest.cpp
  clang/unittests/Format/TokenAnnotatorTest.cpp


Index: clang/unittests/Format/TokenAnnotatorTest.cpp
===================================================================
--- clang/unittests/Format/TokenAnnotatorTest.cpp
+++ clang/unittests/Format/TokenAnnotatorTest.cpp
@@ -437,6 +437,23 @@
   ASSERT_EQ(Tokens.size(), 8u) << Tokens;
   EXPECT_TOKEN(Tokens[3], tok::string_literal, TT_OverloadedOperator);
   EXPECT_TOKEN(Tokens[5], tok::l_paren, TT_OverloadedOperatorLParen);
+
+  Tokens = annotate("int operator+(int);");
+  ASSERT_EQ(Tokens.size(), 8u) << Tokens;
+  EXPECT_TOKEN(Tokens[1], tok::kw_operator, TT_FunctionDeclarationName);
+  EXPECT_TOKEN(Tokens[2], tok::plus, TT_OverloadedOperator);
+  EXPECT_TOKEN(Tokens[3], tok::l_paren, TT_OverloadedOperatorLParen);
+  Tokens = annotate("auto operator=(T&) {}");
+  ASSERT_EQ(Tokens.size(), 10u) << Tokens;
+  EXPECT_TOKEN(Tokens[1], tok::kw_operator, TT_FunctionDeclarationName);
+  EXPECT_TOKEN(Tokens[2], tok::equal, TT_OverloadedOperator);
+  EXPECT_TOKEN(Tokens[3], tok::l_paren, TT_OverloadedOperatorLParen);
+  Tokens = annotate("auto operator()() {}");
+  ASSERT_EQ(Tokens.size(), 9u) << Tokens;
+  EXPECT_TOKEN(Tokens[1], tok::kw_operator, TT_FunctionDeclarationName);
+  EXPECT_TOKEN(Tokens[2], tok::l_paren, TT_OverloadedOperator);
+  EXPECT_TOKEN(Tokens[3], tok::r_paren, TT_OverloadedOperator);
+  EXPECT_TOKEN(Tokens[4], tok::l_paren, TT_OverloadedOperatorLParen);
 }
 
 TEST_F(TokenAnnotatorTest, UnderstandsRequiresClausesAndConcepts) {
Index: clang/unittests/Format/FormatTest.cpp
===================================================================
--- clang/unittests/Format/FormatTest.cpp
+++ clang/unittests/Format/FormatTest.cpp
@@ -17936,6 +17936,14 @@
                "  double        bar();\n"
                "};\n",
                Alignment);
+  // Ensure operators are not aligned if they're being called, not declared
+  verifyFormat("int main() {\n"
+               "  int    operator()(int a);\n"
+               "  double operator+(double a);\n"
+               "  operator()(1);\n"
+               "  operator+(1.0);\n"
+               "};\n",
+               Alignment);
   // http://llvm.org/PR52914
   verifyFormat("char *a[]     = {\"a\", // comment\n"
                "                 \"bb\"};\n"
Index: clang/lib/Format/WhitespaceManager.cpp
===================================================================
--- clang/lib/Format/WhitespaceManager.cpp
+++ clang/lib/Format/WhitespaceManager.cpp
@@ -870,9 +870,7 @@
   AlignTokens(
       Style,
       [](Change const &C) {
-        // tok::kw_operator is necessary for aligning operator overload
-        // definitions.
-        if (C.Tok->isOneOf(TT_FunctionDeclarationName, tok::kw_operator))
+        if (C.Tok->is(TT_FunctionDeclarationName))
           return true;
         if (C.Tok->isNot(TT_StartOfName))
           return false;


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