[refactor] add a refactoring action rule that returns symbol occurrences

Differential Revision: https://reviews.llvm.org/D36574

llvm-svn: 313025

clang/include/clang/Tooling/Refactoring/RefactoringResultConsumer.h

@@ -12,6 +12,7 @@
 
 #include "clang/Basic/LLVM.h"
 #include "clang/Tooling/Refactoring/AtomicChange.h"
+#include "clang/Tooling/Refactoring/Rename/SymbolOccurrences.h"
 #include "llvm/Support/Error.h"
 
 namespace clang {
@@ -34,6 +35,10 @@ public:
     defaultResultHandler();
   }
 
+  /// Handles the symbol occurrences that are found by an interactive
+  /// refactoring action.
+  virtual void handle(SymbolOccurrences Occurrences) { defaultResultHandler(); }
+
 private:
   void defaultResultHandler() {
     handleError(llvm::make_error<llvm::StringError>(

clang/unittests/Tooling/RefactoringActionRulesTest.cpp

@@ -11,6 +11,7 @@
 #include "RewriterTestContext.h"
 #include "clang/Tooling/Refactoring.h"
 #include "clang/Tooling/Refactoring/RefactoringActionRules.h"
+#include "clang/Tooling/Refactoring/Rename/SymbolName.h"
 #include "clang/Tooling/Tooling.h"
 #include "llvm/Support/Errc.h"
 #include "gtest/gtest.h"
@@ -175,4 +176,49 @@ TEST_F(RefactoringActionRulesTest, ReturnInitiationDiagnostic) {
   EXPECT_EQ(Message, "bad selection");
 }
 
+Optional<SymbolOccurrences> findOccurrences(RefactoringActionRule &Rule,
+                                            RefactoringRuleContext &Context) {
+  class Consumer final : public RefactoringResultConsumer {
+    void handleError(llvm::Error) override {}
+    void handle(SymbolOccurrences Occurrences) override {
+      Result = std::move(Occurrences);
+    }
+
+  public:
+    Optional<SymbolOccurrences> Result;
+  };
+
+  Consumer C;
+  Rule.invoke(C, Context);
+  return std::move(C.Result);
+}
+
+TEST_F(RefactoringActionRulesTest, ReturnSymbolOccurrences) {
+  auto Rule = createRefactoringRule(
+      [](selection::SourceSelectionRange Selection)
+          -> Expected<SymbolOccurrences> {
+        SymbolOccurrences Occurrences;
+        Occurrences.push_back(SymbolOccurrence(
+            SymbolName("test"), SymbolOccurrence::MatchingSymbol,
+            Selection.getRange().getBegin()));
+        return Occurrences;
+      },
+      requiredSelection(
+          selection::identity<selection::SourceSelectionRange>()));
+
+  RefactoringRuleContext RefContext(Context.Sources);
+  SourceLocation Cursor =
+      Context.Sources.getLocForStartOfFile(Context.Sources.getMainFileID());
+  RefContext.setSelectionRange({Cursor, Cursor});
+  Optional<SymbolOccurrences> Result = findOccurrences(*Rule, RefContext);
+
+  ASSERT_FALSE(!Result);
+  SymbolOccurrences Occurrences = std::move(*Result);
+  EXPECT_EQ(Occurrences.size(), 1u);
+  EXPECT_EQ(Occurrences[0].getKind(), SymbolOccurrence::MatchingSymbol);
+  EXPECT_EQ(Occurrences[0].getNameRanges().size(), 1u);
+  EXPECT_EQ(Occurrences[0].getNameRanges()[0],
+            SourceRange(Cursor, Cursor.getLocWithOffset(strlen("test"))));
+}
+
 } // end anonymous namespace