Flip the order the preprocessor and frontendaction are informed of the end of a file.

This allows using EndOfMainFile from a PPCallback to access data from the
action. The pattern of PPCallback referencing an action is common in clang-tidy.

Differential Revision: http://reviews.llvm.org/D4773

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@215145 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 46 insertions, 0 deletions

diff --git a/unittests/Frontend/FrontendActionTest.cpp b/unittests/Frontend/FrontendActionTest.cpp
index e39d00f6af..44843eed13 100644
--- a/unittests/Frontend/FrontendActionTest.cpp
+++ b/unittests/Frontend/FrontendActionTest.cpp
@@ -100,4 +100,50 @@ TEST(ASTFrontendAction, IncrementalParsing) {
   EXPECT_EQ("x", test_action.decl_names[1]);
 }
 
+struct TestPPCallbacks : public PPCallbacks {
+  TestPPCallbacks() : SeenEnd(false) {}
+
+  void EndOfMainFile() override { SeenEnd = true; }
+
+  bool SeenEnd;
+};
+
+class TestPPCallbacksFrontendAction : public PreprocessorFrontendAction {
+  TestPPCallbacks *Callbacks;
+
+public:
+  TestPPCallbacksFrontendAction(TestPPCallbacks *C)
+      : Callbacks(C), SeenEnd(false) {}
+
+  void ExecuteAction() override {
+    Preprocessor &PP = getCompilerInstance().getPreprocessor();
+    PP.addPPCallbacks(Callbacks);
+    PP.EnterMainSourceFile();
+  }
+  void EndSourceFileAction() override { SeenEnd = Callbacks->SeenEnd; }
+
+  bool SeenEnd;
+};
+
+TEST(PreprocessorFrontendAction, EndSourceFile) {
+  CompilerInvocation *Invocation = new CompilerInvocation;
+  Invocation->getPreprocessorOpts().addRemappedFile(
+      "test.cc", MemoryBuffer::getMemBuffer("int main() { float x; }"));
+  Invocation->getFrontendOpts().Inputs.push_back(
+      FrontendInputFile("test.cc", IK_CXX));
+  Invocation->getFrontendOpts().ProgramAction = frontend::ParseSyntaxOnly;
+  Invocation->getTargetOpts().Triple = "i386-unknown-linux-gnu";
+  CompilerInstance Compiler;
+  Compiler.setInvocation(Invocation);
+  Compiler.createDiagnostics();
+
+  TestPPCallbacks *Callbacks = new TestPPCallbacks;
+  TestPPCallbacksFrontendAction TestAction(Callbacks);
+  ASSERT_FALSE(Callbacks->SeenEnd);
+  ASSERT_FALSE(TestAction.SeenEnd);
+  ASSERT_TRUE(Compiler.ExecuteAction(TestAction));
+  // Check that EndOfMainFile was called before EndSourceFileAction.
+  ASSERT_TRUE(TestAction.SeenEnd);
+}
+
 } // anonymous namespace