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[Clang] Replace include with forward declaration (NFC) #151292

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Merged
merged 1 commit into from
Jul 30, 2025

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nikic
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@nikic nikic commented Jul 30, 2025

After #142541.

@nikic nikic requested review from AaronBallman and Sirraide July 30, 2025 08:36
@llvmbot llvmbot added clang Clang issues not falling into any other category clang:frontend Language frontend issues, e.g. anything involving "Sema" labels Jul 30, 2025
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llvmbot commented Jul 30, 2025

@llvm/pr-subscribers-clang

Author: Nikita Popov (nikic)

Changes

After #142541.


Full diff: https://github.com/llvm/llvm-project/pull/151292.diff

1 Files Affected:

  • (modified) clang/include/clang/AST/Expr.h (+1-1)
diff --git a/clang/include/clang/AST/Expr.h b/clang/include/clang/AST/Expr.h
index 708c6e2925fd0..6c124aa96cdb4 100644
--- a/clang/include/clang/AST/Expr.h
+++ b/clang/include/clang/AST/Expr.h
@@ -16,7 +16,6 @@
 #include "clang/AST/APNumericStorage.h"
 #include "clang/AST/APValue.h"
 #include "clang/AST/ASTVector.h"
-#include "clang/AST/Attr.h"
 #include "clang/AST/ComputeDependence.h"
 #include "clang/AST/Decl.h"
 #include "clang/AST/DeclAccessPair.h"
@@ -58,6 +57,7 @@ namespace clang {
   class StringLiteral;
   class TargetInfo;
   class ValueDecl;
+  class WarnUnusedResultAttr;
 
 /// A simple array of base specifiers.
 typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath;

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⚠️ C/C++ code formatter, clang-format found issues in your code. ⚠️

You can test this locally with the following command:
git-clang-format --diff HEAD~1 HEAD --extensions h -- clang/include/clang/AST/Expr.h
View the diff from clang-format here.
diff --git a/clang/include/clang/AST/Expr.h b/clang/include/clang/AST/Expr.h
index 6c124aa96..4b49a0d50 100644
--- a/clang/include/clang/AST/Expr.h
+++ b/clang/include/clang/AST/Expr.h
@@ -59,50 +59,51 @@ namespace clang {
   class ValueDecl;
   class WarnUnusedResultAttr;
 
-/// A simple array of base specifiers.
-typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath;
-
-/// An adjustment to be made to the temporary created when emitting a
-/// reference binding, which accesses a particular subobject of that temporary.
-struct SubobjectAdjustment {
-  enum {
-    DerivedToBaseAdjustment,
-    FieldAdjustment,
-    MemberPointerAdjustment
-  } Kind;
-
-  struct DTB {
-    const CastExpr *BasePath;
-    const CXXRecordDecl *DerivedClass;
-  };
+  /// A simple array of base specifiers.
+  typedef SmallVector<CXXBaseSpecifier *, 4> CXXCastPath;
+
+  /// An adjustment to be made to the temporary created when emitting a
+  /// reference binding, which accesses a particular subobject of that
+  /// temporary.
+  struct SubobjectAdjustment {
+    enum {
+      DerivedToBaseAdjustment,
+      FieldAdjustment,
+      MemberPointerAdjustment
+    } Kind;
+
+    struct DTB {
+      const CastExpr *BasePath;
+      const CXXRecordDecl *DerivedClass;
+    };
 
-  struct P {
-    const MemberPointerType *MPT;
-    Expr *RHS;
-  };
+    struct P {
+      const MemberPointerType *MPT;
+      Expr *RHS;
+    };
 
-  union {
-    struct DTB DerivedToBase;
-    const FieldDecl *Field;
-    struct P Ptr;
-  };
+    union {
+      struct DTB DerivedToBase;
+      const FieldDecl *Field;
+      struct P Ptr;
+    };
 
-  SubobjectAdjustment(const CastExpr *BasePath,
-                      const CXXRecordDecl *DerivedClass)
-    : Kind(DerivedToBaseAdjustment) {
-    DerivedToBase.BasePath = BasePath;
-    DerivedToBase.DerivedClass = DerivedClass;
-  }
+    SubobjectAdjustment(const CastExpr *BasePath,
+                        const CXXRecordDecl *DerivedClass)
+        : Kind(DerivedToBaseAdjustment) {
+      DerivedToBase.BasePath = BasePath;
+      DerivedToBase.DerivedClass = DerivedClass;
+    }
 
-  SubobjectAdjustment(const FieldDecl *Field) : Kind(FieldAdjustment) {
-    this->Field = Field;
-  }
+    SubobjectAdjustment(const FieldDecl *Field) : Kind(FieldAdjustment) {
+      this->Field = Field;
+    }
 
-  SubobjectAdjustment(const MemberPointerType *MPT, Expr *RHS)
-    : Kind(MemberPointerAdjustment) {
-    this->Ptr.MPT = MPT;
-    this->Ptr.RHS = RHS;
-  }
+    SubobjectAdjustment(const MemberPointerType *MPT, Expr *RHS)
+        : Kind(MemberPointerAdjustment) {
+      this->Ptr.MPT = MPT;
+      this->Ptr.RHS = RHS;
+    }
 };
 
 /// This represents one expression.  Note that Expr's are subclasses of Stmt.

@nikic nikic merged commit 984ec02 into llvm:main Jul 30, 2025
11 of 12 checks passed
@nikic nikic deleted the clang-forward-declare branch July 30, 2025 10:18
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llvm-ci commented Jul 30, 2025

LLVM Buildbot has detected a new failure on builder clang-m68k-linux-cross running on suse-gary-m68k-cross while building clang at step 5 "ninja check 1".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/27/builds/13848

Here is the relevant piece of the build log for the reference
Step 5 (ninja check 1) failure: stage 1 checked (failure)
...
[248/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RecursiveASTVisitorTestTypeLocVisitor.cpp.o
[249/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/ReplacementsYamlTest.cpp.o
[250/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/ASTMatchers/ASTMatchersNarrowingTest.cpp.o
[251/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RefactoringActionRulesTest.cpp.o
[252/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RecursiveASTVisitorTests/InitListExprPostOrder.cpp.o
[253/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/Syntax/MutationsTest.cpp.o
[254/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/Syntax/TreeTestBase.cpp.o
[255/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/Syntax/SynthesisTest.cpp.o
[256/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RecursiveASTVisitorTests/InitListExprPostOrderNoQueue.cpp.o
[257/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/AST/ASTImporterTest.cpp.o
FAILED: tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/AST/ASTImporterTest.cpp.o 
/usr/bin/c++ -DEXPERIMENTAL_KEY_INSTRUCTIONS -DGTEST_HAS_RTTI=0 -DLLVM_BUILD_STATIC -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -D__SHORT_FILE__=\"ASTImporterTest.cpp\" -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/stage1/tools/clang/unittests -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang/unittests -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang/include -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/stage1/tools/clang/include -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/stage1/include -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/llvm/include -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang/unittests/Tooling -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/third-party/unittest/googletest/include -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/third-party/unittest/googlemock/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough -Wno-uninitialized -Wno-nonnull -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wno-misleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -fno-common -Woverloaded-virtual -O3 -DNDEBUG -std=c++17  -Wno-variadic-macros -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -Wno-suggest-override -MD -MT tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/AST/ASTImporterTest.cpp.o -MF tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/AST/ASTImporterTest.cpp.o.d -o tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/AST/ASTImporterTest.cpp.o -c /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang/unittests/AST/ASTImporterTest.cpp
c++: fatal error: Killed signal terminated program cc1plus
compilation terminated.
[258/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Frontend/CodeGenActionTest.cpp.o
[259/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/Syntax/TreeTest.cpp.o
[260/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Frontend/ASTUnitTest.cpp.o
[261/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Frontend/SearchPathTest.cpp.o
[262/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/ToolingTest.cpp.o
[263/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RefactoringCallbacksTest.cpp.o
[264/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RefactoringTest.cpp.o
[265/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Frontend/CompilerInstanceTest.cpp.o
[266/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Frontend/OutputStreamTest.cpp.o
[267/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Frontend/PCHPreambleTest.cpp.o
[268/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/SourceCodeBuildersTest.cpp.o
[269/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RecursiveASTVisitorTests/CallbacksLeaf.cpp.o
[270/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/Syntax/BuildTreeTest.cpp.o
[271/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Frontend/FrontendActionTest.cpp.o
In file included from /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang/unittests/Frontend/FrontendActionTest.cpp:19:
/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang/include/clang/Sema/Sema.h:848:7: warning: ‘clang::Sema’ declared with greater visibility than the type of its field ‘clang::Sema::UnusedFileScopedDecls’ [-Wattributes]
  848 | class Sema final : public SemaBase {
      |       ^~~~
/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang/include/clang/Sema/Sema.h:848:7: warning: ‘clang::Sema’ declared with greater visibility than the type of its field ‘clang::Sema::TentativeDefinitions’ [-Wattributes]
/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang/include/clang/Sema/Sema.h:848:7: warning: ‘clang::Sema’ declared with greater visibility than the type of its field ‘clang::Sema::ExtVectorDecls’ [-Wattributes]
/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang/include/clang/Sema/Sema.h:848:7: warning: ‘clang::Sema’ declared with greater visibility than the type of its field ‘clang::Sema::DelegatingCtorDecls’ [-Wattributes]
[272/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Frontend/ReparseWorkingDirTest.cpp.o
[273/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Rewrite/RewriterTest.cpp.o
[274/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Frontend/UtilsTest.cpp.o
[275/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/SourceCodeTest.cpp.o
[276/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/Syntax/TokensTest.cpp.o
[277/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RecursiveASTVisitorTestPostOrderVisitor.cpp.o
[278/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RecursiveASTVisitorTests/CallbacksBinaryOperator.cpp.o
[279/375] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Sema/CodeCompleteTest.cpp.o
In file included from /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang/unittests/Sema/CodeCompleteTest.cpp:13:
/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang/include/clang/Sema/Sema.h:848:7: warning: ‘clang::Sema’ declared with greater visibility than the type of its field ‘clang::Sema::UnusedFileScopedDecls’ [-Wattributes]
  848 | class Sema final : public SemaBase {
      |       ^~~~
/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang/include/clang/Sema/Sema.h:848:7: warning: ‘clang::Sema’ declared with greater visibility than the type of its field ‘clang::Sema::TentativeDefinitions’ [-Wattributes]
/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang/include/clang/Sema/Sema.h:848:7: warning: ‘clang::Sema’ declared with greater visibility than the type of its field ‘clang::Sema::ExtVectorDecls’ [-Wattributes]

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