https://github.com/ZhongRuoyu created https://github.com/llvm/llvm-project/pull/160731
Lines appearing after preprocessor conditional blocks (like `#endif`) were not having their qualifiers reordered by `QualifierOrder`, while lines inside the conditional blocks were processed correctly. The issue was that tokens on lines following preprocessor directives have `MustBreakBefore` = `true`. The qualifier alignment logic was breaking immediately upon encountering any token with `MustBreakBefore` = `true`, preventing analysis of the entire line. The fix allows processing to continue when `MustBreakBefore` = `true` on the first token of a line, since this is expected behavior (the token legitimately starts a new line). Only tokens with `MustBreakBefore` = `true` that appear mid-line will cause the analysis loop to break. Fixes https://github.com/llvm/llvm-project/issues/160487. CC @owenca. >From 2c8e4b75a4711940f0fd49c23b5208a678689d04 Mon Sep 17 00:00:00 2001 From: Ruoyu Zhong <[email protected]> Date: Fri, 26 Sep 2025 00:19:53 +0800 Subject: [PATCH] [clang-format] Fix qualifier ordering for lines after PP directives Lines appearing after preprocessor conditional blocks (like #endif) were not having their qualifiers reordered by QualifierOrder, while lines inside the conditional blocks were processed correctly. The issue was that tokens on lines following preprocessor directives have MustBreakBefore = true. The qualifier alignment logic was breaking immediately upon encountering any token with MustBreakBefore = true, preventing analysis of the entire line. The fix allows processing to continue when MustBreakBefore = true on the first token of a line, since this is expected behavior (the token legitimately starts a new line). Only tokens with MustBreakBefore = true that appear mid-line will cause the analysis loop to break. Fixes https://github.com/llvm/llvm-project/issues/160487. Signed-off-by: Ruoyu Zhong <[email protected]> --- clang/lib/Format/QualifierAlignmentFixer.cpp | 2 +- clang/unittests/Format/QualifierFixerTest.cpp | 35 +++++++++++++++++++ 2 files changed, 36 insertions(+), 1 deletion(-) diff --git a/clang/lib/Format/QualifierAlignmentFixer.cpp b/clang/lib/Format/QualifierAlignmentFixer.cpp index 441a37a4902b7..043d957611b19 100644 --- a/clang/lib/Format/QualifierAlignmentFixer.cpp +++ b/clang/lib/Format/QualifierAlignmentFixer.cpp @@ -571,7 +571,7 @@ void LeftRightQualifierAlignmentFixer::fixQualifierAlignment( for (const auto *Tok = First; Tok && Tok != Last && Tok->Next; Tok = Tok->Next) { - if (Tok->MustBreakBefore) + if (Tok->MustBreakBefore && Tok != First) break; if (Tok->is(tok::comment)) continue; diff --git a/clang/unittests/Format/QualifierFixerTest.cpp b/clang/unittests/Format/QualifierFixerTest.cpp index f42f2e307f713..be5b5d7118184 100644 --- a/clang/unittests/Format/QualifierFixerTest.cpp +++ b/clang/unittests/Format/QualifierFixerTest.cpp @@ -1195,6 +1195,41 @@ TEST_F(QualifierFixerTest, QualifiersBrokenUpByPPDirectives) { Style); } +TEST_F(QualifierFixerTest, QualifierOrderingAfterPreprocessorDirectives) { + auto Style = getLLVMStyle(); + Style.QualifierAlignment = FormatStyle::QAS_Custom; + Style.QualifierOrder = {"static", "inline", "const", "type"}; + + verifyFormat("#if 1\n" + "void foo(const int par);\n" + "const int var1;\n" + "#endif\n" + "\n" + "const int var2;\n" + "const int var3;\n", + "#if 1\n" + "void foo(int const par);\n" + "int const var1;\n" + "#endif\n" + "\n" + "int const var2;\n" + "int const var3;\n", + Style); + verifyFormat("#if defined(FOO)\n" + "static const int x = 1;\n" + "#else\n" + "static const int x = 2;\n" + "#endif\n" + "static const int y = 3;", + "#if defined(FOO)\n" + "const static int x = 1;\n" + "#else\n" + "const static int x = 2;\n" + "#endif\n" + "const static int y = 3;", + Style); +} + TEST_F(QualifierFixerTest, UnsignedQualifier) { FormatStyle Style = getLLVMStyle(); _______________________________________________ cfe-commits mailing list [email protected] https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
