Author: Marco Maia
Date: 2025-11-03T13:15:32-05:00
New Revision: 84a9ed25e816a51df765770e8867bccbde8da8e9

URL: 
https://github.com/llvm/llvm-project/commit/84a9ed25e816a51df765770e8867bccbde8da8e9
DIFF: 
https://github.com/llvm/llvm-project/commit/84a9ed25e816a51df765770e8867bccbde8da8e9.diff

LOG: [clangd] Preserve qualified names in "override pure virtual methods" tweak 
(#163726)

Prevents the tweak from splitting **qualified names** (e.g.,
`foo::Type`) by incorrectly inserting a space around the scope
resolution (`::`).

**Before:**

```cpp
// input:
virtual foo::Type::func() = 0 
// output:
foo :: Type :: func()
```

**After:**

```cpp
// input:
virtual foo::Type::func() = 0 
// output:
foo::Type::func()
```

Added: 
    

Modified: 
    clang-tools-extra/clangd/refactor/tweaks/OverridePureVirtuals.cpp
    clang-tools-extra/clangd/unittests/tweaks/OverridePureVirtualsTests.cpp

Removed: 
    


################################################################################
diff  --git a/clang-tools-extra/clangd/refactor/tweaks/OverridePureVirtuals.cpp 
b/clang-tools-extra/clangd/refactor/tweaks/OverridePureVirtuals.cpp
index 16febeca70809..b557066d979f5 100644
--- a/clang-tools-extra/clangd/refactor/tweaks/OverridePureVirtuals.cpp
+++ b/clang-tools-extra/clangd/refactor/tweaks/OverridePureVirtuals.cpp
@@ -79,7 +79,7 @@
 
 #include "clang/AST/ASTContext.h"
 #include "clang/AST/DeclCXX.h"
-#include "clang/AST/Type.h"
+#include "clang/AST/TypeBase.h"
 #include "clang/AST/TypeLoc.h"
 #include "clang/Basic/LLVM.h"
 #include "clang/Basic/SourceLocation.h"
@@ -116,7 +116,8 @@ std::string removePureVirtualSyntax(const std::string 
&MethodDecl,
 
     DeclString += Tk.text();
     if (Tk.Kind != tok::l_paren && Next.Kind != tok::comma &&
-        Next.Kind != tok::r_paren && Next.Kind != tok::l_paren)
+        Next.Kind != tok::r_paren && Next.Kind != tok::l_paren &&
+        Tk.Kind != tok::coloncolon && Next.Kind != tok::coloncolon)
       DeclString += ' ';
   }
   // Trim the last whitespace.

diff  --git 
a/clang-tools-extra/clangd/unittests/tweaks/OverridePureVirtualsTests.cpp 
b/clang-tools-extra/clangd/unittests/tweaks/OverridePureVirtualsTests.cpp
index b7dcbee1650ec..72095ab2f5982 100644
--- a/clang-tools-extra/clangd/unittests/tweaks/OverridePureVirtualsTests.cpp
+++ b/clang-tools-extra/clangd/unittests/tweaks/OverridePureVirtualsTests.cpp
@@ -715,6 +715,45 @@ class D : public B {
   EXPECT_EQ(Expected, Applied) << "Applied result:\n" << Applied;
 }
 
+TEST_F(OverridePureVirtualsTests, QualifiedNames) {
+  constexpr auto Before = R"cpp(
+namespace foo { struct S{}; namespace bar { struct S2{}; } }
+
+class B {
+public:
+  virtual foo::S foo(int var = 0) = 0;
+  virtual foo::bar::S2 bar(int var = 0) = 0;
+};
+
+class ^D : public B {};
+)cpp";
+
+  constexpr auto Expected = R"cpp(
+namespace foo { struct S{}; namespace bar { struct S2{}; } }
+
+class B {
+public:
+  virtual foo::S foo(int var = 0) = 0;
+  virtual foo::bar::S2 bar(int var = 0) = 0;
+};
+
+class D : public B {
+public:
+  foo::S foo(int var = 0) override {
+    // TODO: Implement this pure virtual method.
+    static_assert(false, "Method `foo` is not implemented.");
+  }
+
+  foo::bar::S2 bar(int var = 0) override {
+    // TODO: Implement this pure virtual method.
+    static_assert(false, "Method `bar` is not implemented.");
+  }
+};
+)cpp";
+  auto Applied = apply(Before);
+  EXPECT_EQ(Expected, Applied) << "Applied result:\n" << Applied;
+}
+
 } // namespace
 } // namespace clangd
 } // namespace clang


        
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