[clang-rename] Rename enum.

Summary:
* Add unit tests for renaming enum.
* Support unscoped enum constants in expressions.

Reviewers: ioeric

Reviewed By: ioeric

Subscribers: klimek, mgorny, cfe-commits

Differential Revision: https://reviews.llvm.org/D38989

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@315999 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 190 insertions, 0 deletions

diff --git a/unittests/Rename/CMakeLists.txt b/unittests/Rename/CMakeLists.txt
index 763ba3b3b0..5a6875e0bc 100644
--- a/unittests/Rename/CMakeLists.txt
+++ b/unittests/Rename/CMakeLists.txt
@@ -7,6 +7,7 @@ include_directories(${CLANG_SOURCE_DIR})
 
 add_clang_unittest(ClangRenameTests
   RenameClassTest.cpp
+  RenameEnumTest.cpp
   RenameFunctionTest.cpp
   )
 
diff --git a/unittests/Rename/RenameEnumTest.cpp b/unittests/Rename/RenameEnumTest.cpp
new file mode 100644
index 0000000000..55dcd11ac4
--- /dev/null
+++ b/unittests/Rename/RenameEnumTest.cpp
@@ -0,0 +1,189 @@
+#include "ClangRenameTest.h"
+
+namespace clang {
+namespace clang_rename {
+namespace test {
+namespace {
+
+class RenameEnumTest : public ClangRenameTest {
+public:
+  RenameEnumTest() {
+    AppendToHeader(R"(
+        #define MACRO(x) x
+        namespace a {
+        enum A1 { Red };
+        enum class A2 { Blue };
+        struct C {
+         enum NestedEnum { White };
+         enum class NestedScopedEnum { Black };
+        };
+        namespace d {
+        enum A3 { Orange };
+        } // namespace d
+        enum A4 { Pink };
+        } // namespace a
+        enum A5 { Green };)");
+  }
+};
+
+INSTANTIATE_TEST_CASE_P(
+    RenameEnumTests, RenameEnumTest,
+    testing::ValuesIn(std::vector<Case>({
+        {"void f(a::A2 arg) { a::A2 t = a::A2::Blue; }",
+         "void f(b::B2 arg) { b::B2 t = b::B2::Blue; }", "a::A2", "b::B2"},
+        {"void f() { a::A1* t1; }", "void f() { b::B1* t1; }", "a::A1",
+         "b::B1"},
+        {"void f() { a::A2* t1; }", "void f() { b::B2* t1; }", "a::A2",
+         "b::B2"},
+        {"void f() { enum a::A2 t = a::A2::Blue; }",
+         "void f() { enum b::B2 t = b::B2::Blue; }", "a::A2", "b::B2"},
+        {"void f() { enum a::A2 t = a::A2::Blue; }",
+         "void f() { enum b::B2 t = b::B2::Blue; }", "a::A2", "b::B2"},
+
+        {"void f() { a::A1 t = a::Red; }", "void f() { b::B1 t = b::B1::Red; }",
+         "a::A1", "b::B1"},
+        {"void f() { a::A1 t = a::A1::Red; }",
+         "void f() { b::B1 t = b::B1::Red; }", "a::A1", "b::B1"},
+        {"void f() { auto t = a::Red; }", "void f() { auto t = b::B1::Red; }",
+         "a::A1", "b::B1"},
+        {"namespace b { void f() { a::A1 t = a::Red; } }",
+         "namespace b { void f() { B1 t = B1::Red; } }", "a::A1", "b::B1"},
+        {"void f() { a::d::A3 t = a::d::Orange; }",
+         "void f() { a::b::B3 t = a::b::B3::Orange; }", "a::d::A3", "a::b::B3"},
+        {"namespace a { void f() { a::d::A3 t = a::d::Orange; } }",
+         "namespace a { void f() { b::B3 t = b::B3::Orange; } }", "a::d::A3",
+         "a::b::B3"},
+        {"void f() { A5 t = Green; }", "void f() { B5 t = Green; }", "A5",
+         "B5"},
+        // FIXME: the new namespace qualifier should be added to the unscoped
+        // enum constant.
+        {"namespace a { void f() { auto t = Green; } }",
+         "namespace a { void f() { auto t = Green; } }", "a::A1", "b::B1"},
+
+        // namespace qualifiers
+        {"namespace a { void f(A1 a1) {} }",
+         "namespace a { void f(b::B1 a1) {} }", "a::A1", "b::B1"},
+        {"namespace a { void f(A2 a2) {} }",
+         "namespace a { void f(b::B2 a2) {} }", "a::A2", "b::B2"},
+        {"namespace b { void f(a::A1 a1) {} }",
+         "namespace b { void f(B1 a1) {} }", "a::A1", "b::B1"},
+        {"namespace b { void f(a::A2 a2) {} }",
+         "namespace b { void f(B2 a2) {} }", "a::A2", "b::B2"},
+
+        // nested enums
+        {"void f() { a::C::NestedEnum t = a::C::White; }",
+         "void f() { a::C::NewNestedEnum t = a::C::NewNestedEnum::White; }",
+         "a::C::NestedEnum", "a::C::NewNestedEnum"},
+        {"void f() { a::C::NestedScopedEnum t = a::C::NestedScopedEnum::Black; "
+         "}",
+         "void f() { a::C::NewNestedScopedEnum t = "
+         "a::C::NewNestedScopedEnum::Black; }",
+         "a::C::NestedScopedEnum", "a::C::NewNestedScopedEnum"},
+
+        // macros
+        {"void f(MACRO(a::A1) a1) {}", "void f(MACRO(b::B1) a1) {}", "a::A1",
+         "b::B1"},
+        {"void f(MACRO(a::A2) a2) {}", "void f(MACRO(b::B2) a2) {}", "a::A2",
+         "b::B2"},
+        {"#define FOO(T, t) T t\nvoid f() { FOO(a::A1, a1); }",
+         "#define FOO(T, t) T t\nvoid f() { FOO(b::B1, a1); }", "a::A1",
+         "b::B1"},
+        {"#define FOO(T, t) T t\nvoid f() { FOO(a::A2, a2); }",
+         "#define FOO(T, t) T t\nvoid f() { FOO(b::B2, a2); }", "a::A2",
+         "b::B2"},
+        {"#define FOO(n) a::A1 n\nvoid f() { FOO(a1); FOO(a2); }",
+         "#define FOO(n) b::B1 n\nvoid f() { FOO(a1); FOO(a2); }", "a::A1",
+         "b::B1"},
+
+        // using and type alias
+        {"using a::A1; A1 gA;", "using b::B1; b::B1 gA;", "a::A1", "b::B1"},
+        {"using a::A2; A2 gA;", "using b::B2; b::B2 gA;", "a::A2", "b::B2"},
+        {"struct S { using T = a::A1; T a_; };",
+         "struct S { using T = b::B1; T a_; };", "a::A1", "b::B1"},
+        {"using T = a::A1; T gA;", "using T = b::B1; T gA;", "a::A1", "b::B1"},
+        {"using T = a::A2; T gA;", "using T = b::B2; T gA;", "a::A2", "b::B2"},
+        {"typedef a::A1 T; T gA;", "typedef b::B1 T; T gA;", "a::A1", "b::B1"},
+        {"typedef a::A2 T; T gA;", "typedef b::B2 T; T gA;", "a::A2", "b::B2"},
+        {"typedef MACRO(a::A1) T; T gA;", "typedef MACRO(b::B1) T; T gA;",
+         "a::A1", "b::B1"},
+
+        // templates
+        {"template<typename T> struct Foo { T t; }; void f() { Foo<a::A1> "
+         "foo1; }",
+         "template<typename T> struct Foo { T t; }; void f() { Foo<b::B1> "
+         "foo1; }",
+         "a::A1", "b::B1"},
+        {"template<typename T> struct Foo { T t; }; void f() { Foo<a::A2> "
+         "foo2; }",
+         "template<typename T> struct Foo { T t; }; void f() { Foo<b::B2> "
+         "foo2; }",
+         "a::A2", "b::B2"},
+        {"template<typename T> struct Foo { a::A1 a1; };",
+         "template<typename T> struct Foo { b::B1 a1; };", "a::A1", "b::B1"},
+        {"template<typename T> struct Foo { a::A2 a2; };",
+         "template<typename T> struct Foo { b::B2 a2; };", "a::A2", "b::B2"},
+        {"template<typename T> int f() { return 1; } template<> int f<a::A1>() "
+         "{ return 2; } int g() { return f<a::A1>(); }",
+         "template<typename T> int f() { return 1; } template<> int f<b::B1>() "
+         "{ return 2; } int g() { return f<b::B1>(); }",
+         "a::A1", "b::B1"},
+        {"template<typename T> int f() { return 1; } template<> int f<a::A2>() "
+         "{ return 2; } int g() { return f<a::A2>(); }",
+         "template<typename T> int f() { return 1; } template<> int f<b::B2>() "
+         "{ return 2; } int g() { return f<b::B2>(); }",
+         "a::A2", "b::B2"},
+        {"struct Foo { template <typename T> T foo(); }; void g() { Foo f;  "
+         "f.foo<a::A1>(); }",
+         "struct Foo { template <typename T> T foo(); }; void g() { Foo f;  "
+         "f.foo<b::B1>(); }",
+         "a::A1", "b::B1"},
+        {"struct Foo { template <typename T> T foo(); }; void g() { Foo f;  "
+         "f.foo<a::A2>(); }",
+         "struct Foo { template <typename T> T foo(); }; void g() { Foo f;  "
+         "f.foo<b::B2>(); }",
+         "a::A2", "b::B2"},
+    })), );
+
+TEST_P(RenameEnumTest, RenameEnums) {
+  auto Param = GetParam();
+  assert(!Param.OldName.empty());
+  assert(!Param.NewName.empty());
+  std::string Actual =
+      runClangRenameOnCode(Param.Before, Param.OldName, Param.NewName);
+  CompareSnippets(Param.After, Actual);
+}
+
+TEST_F(RenameEnumTest, RenameEnumDecl) {
+  std::string Before = R"(
+      namespace ns {
+      enum Old1 { Blue };
+      }
+  )";
+  std::string Expected = R"(
+      namespace ns {
+      enum New1 { Blue };
+      }
+  )";
+  std::string After = runClangRenameOnCode(Before, "ns::Old1", "ns::New1");
+  CompareSnippets(Expected, After);
+}
+
+TEST_F(RenameEnumTest, RenameScopedEnumDecl) {
+  std::string Before = R"(
+      namespace ns {
+      enum class Old1 { Blue };
+      }
+  )";
+  std::string Expected = R"(
+      namespace ns {
+      enum class New1 { Blue };
+      }
+  )";
+  std::string After = runClangRenameOnCode(Before, "ns::Old1", "ns::New1");
+  CompareSnippets(Expected, After);
+}
+
+} // anonymous namespace
+} // namespace test
+} // namespace clang_rename
+} // namesdpace clang