[clang-move] Fix not moving using-decls in global namespace in old.cc

[ioeric]

test/clang-move/move-multiple-classes.cpp

21 ↗

(On Diff #78488)

Would there be empty lines between these using decls? If so, please add FIXME if you want to handle this in the future.

[hokein]

Add FIXME.

test/clang-move/move-multiple-classes.cpp

21 ↗

(On Diff #78488)

Yes. Done.

[ioeric]

LG

clang-tools-extra/trunk/clang-move/ClangMove.cpp

for (const auto &MovedDecl : Decls) {
     bool IsInNewNamespace = false;
     while (DeclIt != DeclNamespaces.end()) {
       NewCode += "namespace " + *DeclIt + " {\n";
       IsInNewNamespace = true;
       ++DeclIt;
     }
     // If the moved declaration is in same namespace CurrentNamespace, add
     // a preceeding `\n' before the moved declaration.
+    // FIXME: Don't add empty lines between using declarations.
     if (!IsInNewNamespace)
       NewCode += "\n";
     NewCode += getDeclarationSourceText(MovedDecl.Decl, MovedDecl.SM);
     CurrentNamespaces = std::move(NextNamespaces);
   }
   std::reverse(CurrentNamespaces.begin(), CurrentNamespaces.end());
   for (const auto &NS : CurrentNamespaces)
     NewCode += "} // namespace " + NS + "\n";
void ClangMoveTool::registerMatchers(ast_matchers::MatchFinder *Finder) {
   Finder->addMatcher(AllDeclsInHeader.bind("decls_in_header"), this);
   // Match forward declarations in old header.
   Finder->addMatcher(namedDecl(ForwardDecls, InOldHeader).bind("fwd_decl"),
                      this);
 
   //============================================================================
   // Matchers for old cc
   //============================================================================
-  auto InOldCCNamedNamespace =
-      allOf(hasParent(namespaceDecl(unless(isAnonymous()))), InOldCC);
-  // Matching using decls/type alias decls which are in named namespace. Those
-  // in classes, functions and anonymous namespaces are covered in other
-  // matchers.
+  auto InOldCCNamedOrGlobalNamespace =
+      allOf(hasParent(decl(anyOf(namespaceDecl(unless(isAnonymous())),
+                                 translationUnitDecl()))),
+            InOldCC);
+  // Matching using decls/type alias decls which are in named namespace or
+  // global namespace. Those in classes, functions and anonymous namespaces are
+  // covered in other matchers.
   Finder->addMatcher(
-      namedDecl(anyOf(usingDecl(InOldCCNamedNamespace),
-                      usingDirectiveDecl(InOldCC, InOldCCNamedNamespace),
-                      typeAliasDecl(InOldCC, InOldCCNamedNamespace)))
+      namedDecl(anyOf(usingDecl(InOldCCNamedOrGlobalNamespace),
+                      usingDirectiveDecl(InOldCCNamedOrGlobalNamespace),
+                      typeAliasDecl( InOldCCNamedOrGlobalNamespace)))
           .bind("using_decl"),
       this);
 
   // Match anonymous namespace decl in old cc.
   Finder->addMatcher(namespaceDecl(isAnonymous(), InOldCC).bind("anonymous_ns"),
                      this);
 
   // Match static functions/variable definitions which are defined in named
   // namespaces.
   auto IsOldCCStaticDefinition =
-      allOf(isDefinition(), unless(InMovedClass), InOldCCNamedNamespace,
+      allOf(isDefinition(), unless(InMovedClass), InOldCCNamedOrGlobalNamespace,
             isStaticStorageClass());
   Finder->addMatcher(namedDecl(anyOf(functionDecl(IsOldCCStaticDefinition),
                                      varDecl(IsOldCCStaticDefinition)))
                          .bind("static_decls"),
                      this);
 
   //============================================================================
   // Matchers for old files, including old.h/old.cc

clang-tools-extra/trunk/test/clang-move/Inputs/multiple_class_test.cpp

 #include "multiple_class_test.h"
 
+using a::Move1;
+using namespace a;
+using A = a::Move1;
+static int g = 0;
+
 namespace a {
 int Move1::f() {
   return 0;
 }
 } // namespace a
 
 namespace {
 using a::Move1;

clang-tools-extra/trunk/test/clang-move/move-multiple-classes.cpp

 // RUN: mkdir -p %T/move-multiple-classes
 // RUN: cp %S/Inputs/multiple_class_test*  %T/move-multiple-classes/
 // RUN: cd %T/move-multiple-classes
-// RUN: clang-move -names="c::EnclosingMove5::Nested" -new_cc=%T/move-multiple-classes/new_multiple_class_test.cpp -new_header=%T/move-multiple-classes/new_multiple_class_test.h -old_cc=%T/move-multiple-classes/multiple_class_test.cpp -old_header=../move-multiple-classes/multiple_class_test.h -dump_result %T/move-multiple-classes/multiple_class_test.cpp -- | FileCheck %s -check-prefix=CHECK-EMPTY
-// RUN: clang-move -names="a::Move1, b::Move2,c::Move3,c::Move4,c::EnclosingMove5" -new_cc=%T/move-multiple-classes/new_multiple_class_test.cpp -new_header=%T/move-multiple-classes/new_multiple_class_test.h -old_cc=%T/move-multiple-classes/multiple_class_test.cpp -old_header=../move-multiple-classes/multiple_class_test.h %T/move-multiple-classes/multiple_class_test.cpp --
+// RUN: clang-move -names="c::EnclosingMove5::Nested" -new_cc=%T/move-multiple-classes/new_multiple_class_test.cpp -new_header=%T/move-multiple-classes/new_multiple_class_test.h -old_cc=%T/move-multiple-classes/multiple_class_test.cpp -old_header=../move-multiple-classes/multiple_class_test.h -dump_result %T/move-multiple-classes/multiple_class_test.cpp -- -std=c++11| FileCheck %s -check-prefix=CHECK-EMPTY
+// RUN: clang-move -names="a::Move1, b::Move2,c::Move3,c::Move4,c::EnclosingMove5" -new_cc=%T/move-multiple-classes/new_multiple_class_test.cpp -new_header=%T/move-multiple-classes/new_multiple_class_test.h -old_cc=%T/move-multiple-classes/multiple_class_test.cpp -old_header=../move-multiple-classes/multiple_class_test.h %T/move-multiple-classes/multiple_class_test.cpp -- -std=c++11
 // RUN: FileCheck -input-file=%T/move-multiple-classes/new_multiple_class_test.cpp -check-prefix=CHECK-NEW-TEST-CPP %s
 // RUN: FileCheck -input-file=%T/move-multiple-classes/new_multiple_class_test.h -check-prefix=CHECK-NEW-TEST-H %s
 // RUN: FileCheck -input-file=%T/move-multiple-classes/multiple_class_test.cpp -check-prefix=CHECK-OLD-TEST-CPP %s
 // RUN: FileCheck -input-file=%T/move-multiple-classes/multiple_class_test.h -check-prefix=CHECK-OLD-TEST-H %s
 //
 // CHECK-EMPTY: [{{[[:space:]]*}}]
 //
 // CHECK-OLD-TEST-H: namespace c {
 // CHECK-OLD-TEST-H: class NoMove {
 // CHECK-OLD-TEST-H: public:
 // CHECK-OLD-TEST-H:   int f();
 // CHECK-OLD-TEST-H: };
 // CHECK-OLD-TEST-H: } // namespace c
 
 // CHECK-OLD-TEST-CPP: #include "{{.*}}multiple_class_test.h"
+// CHECK-OLD-TEST-CPP: using a::Move1;
+// CHECK-OLD-TEST-CPP: using namespace a;
+// CHECK-OLD-TEST-CPP: using A = a::Move1;
+// CHECK-OLD-TEST-CPP: static int g = 0;
 // CHECK-OLD-TEST-CPP: namespace {
 // CHECK-OLD-TEST-CPP: using a::Move1;
 // CHECK-OLD-TEST-CPP: using namespace a;
 // CHECK-OLD-TEST-CPP: static int k = 0;
 // CHECK-OLD-TEST-CPP: } // anonymous namespace
 // CHECK-OLD-TEST-CPP: namespace b {
 // CHECK-OLD-TEST-CPP: using a::Move1;
 // CHECK-OLD-TEST-CPP: using namespace a;

 // CHECK-NEW-TEST-H:     static int b;
 // CHECK-NEW-TEST-H:   };
 // CHECK-NEW-TEST-H:   static int a;
 // CHECK-NEW-TEST-H: };
 // CHECK-NEW-TEST-H: } // namespace c
 // CHECK-NEW-TEST-H: #endif // {{.*}}NEW_MULTIPLE_CLASS_TEST_H
 
 // CHECK-NEW-TEST-CPP: #include "{{.*}}new_multiple_class_test.h"
+// CHECK-NEW-TEST-CPP: using a::Move1;
+// CHECK-NEW-TEST-CPP: using namespace a;
+// CHECK-NEW-TEST-CPP: using A = a::Move1;
+// CHECK-NEW-TEST-CPP: static int g = 0;
 // CHECK-NEW-TEST-CPP: namespace a {
 // CHECK-NEW-TEST-CPP: int Move1::f() { return 0; }
 // CHECK-NEW-TEST-CPP: } // namespace a
 // CHECK-NEW-TEST-CPP: namespace {
 // CHECK-NEW-TEST-CPP: using a::Move1;
 // CHECK-NEW-TEST-CPP: using namespace a;
 // CHECK-NEW-TEST-CPP: static int k = 0;
 // CHECK-NEW-TEST-CPP: } // anonymous namespace