Add CodeCompletion consumer to CompilerInvocation.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@87100 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/Frontend/CompilerInstance.h

@@ -17,10 +17,12 @@
 
 namespace llvm {
 class LLVMContext;
+class raw_ostream;
 }
 
 namespace clang {
 class ASTContext;
+class CodeCompleteConsumer;
 class Diagnostic;
 class DiagnosticClient;
 class ExternalASTSource;
@@ -77,6 +79,9 @@ class CompilerInstance {
   /// The AST context.
   llvm::OwningPtr<ASTContext> Context;
 
+  /// The code completion consumer.
+  llvm::OwningPtr<CodeCompleteConsumer> CompletionConsumer;
+
 public:
   /// Create a new compiler instance with the given LLVM context, optionally
   /// taking ownership of it.
@@ -302,6 +307,30 @@ public:
   /// takes ownership of \arg Value.
   void setASTContext(ASTContext *Value) { Context.reset(Value); }
 
+  /// }
+  /// @name Code Completion
+  /// {
+
+  bool hasCodeCompletionConsumer() const { return CompletionConsumer != 0; }
+
+  CodeCompleteConsumer &getCodeCompletionConsumer() const {
+    assert(CompletionConsumer &&
+           "Compiler instance has no code completion consumer!");
+    return *CompletionConsumer;
+  }
+
+  /// takeCodeCompletionConsumer - Remove the current code completion consumer
+  /// and give ownership to the caller.
+  CodeCompleteConsumer *takeCodeCompletionConsumer() {
+    return CompletionConsumer.take();
+  }
+
+  /// setCodeCompletionConsumer - Replace the current code completion consumer;
+  /// the compiler instance takes ownership of \arg Value.
+  void setCodeCompletionConsumer(CodeCompleteConsumer *Value) {
+    CompletionConsumer.reset(Value);
+  }
+
   /// }
   /// @name Construction Utility Methods
   /// {
@@ -363,6 +392,20 @@ public:
   createPCHExternalASTSource(llvm::StringRef Path, const std::string &Sysroot,
                              Preprocessor &PP, ASTContext &Context);
 
+  /// Create a code completion consumer using the invocation; note that this
+  /// will cause the source manager to truncate the input source file at the
+  /// completion point.
+  void createCodeCompletionConsumer();
+
+  /// Create a code completion consumer to print code completion results, at
+  /// \arg Filename, \arg Line, and \arg Column, to the given output stream \arg
+  /// OS.
+  static CodeCompleteConsumer *
+  createCodeCompletionConsumer(Preprocessor &PP, const std::string &Filename,
+                               unsigned Line, unsigned Column,
+                               bool UseDebugPrinter, bool ShowMacros,
+                               llvm::raw_ostream &OS);
+
   /// }
 };
 

lib/Frontend/CompilerInstance.cpp

@@ -18,9 +18,11 @@
 #include "clang/Lex/PTHManager.h"
 #include "clang/Frontend/ChainedDiagnosticClient.h"
 #include "clang/Frontend/PCHReader.h"
+#include "clang/Frontend/FrontendDiagnostic.h"
 #include "clang/Frontend/TextDiagnosticBuffer.h"
 #include "clang/Frontend/TextDiagnosticPrinter.h"
 #include "clang/Frontend/Utils.h"
+#include "clang/Sema/CodeCompleteConsumer.h"
 #include "llvm/LLVMContext.h"
 #include "llvm/Support/raw_ostream.h"
 using namespace clang;
@@ -29,7 +31,7 @@ CompilerInstance::CompilerInstance(llvm::LLVMContext *_LLVMContext,
                                    bool _OwnsLLVMContext)
   : LLVMContext(_LLVMContext),
     OwnsLLVMContext(_OwnsLLVMContext) {
-}
+    }
 
 CompilerInstance::~CompilerInstance() {
   if (OwnsLLVMContext)
@@ -202,3 +204,42 @@ CompilerInstance::createPCHExternalASTSource(llvm::StringRef Path,
 
   return 0;
 }
+
+// Code Completion
+
+void CompilerInstance::createCodeCompletionConsumer() {
+  const ParsedSourceLocation &Loc = getFrontendOpts().CodeCompletionAt;
+  CompletionConsumer.reset(
+    createCodeCompletionConsumer(getPreprocessor(),
+                                 Loc.FileName, Loc.Line, Loc.Column,
+                                 getFrontendOpts().DebugCodeCompletionPrinter,
+                                 getFrontendOpts().ShowMacrosInCodeCompletion,
+                                 llvm::outs()));
+}
+
+CodeCompleteConsumer *
+CompilerInstance::createCodeCompletionConsumer(Preprocessor &PP,
+                                               const std::string &Filename,
+                                               unsigned Line,
+                                               unsigned Column,
+                                               bool UseDebugPrinter,
+                                               bool ShowMacros,
+                                               llvm::raw_ostream &OS) {
+  // Tell the source manager to chop off the given file at a specific
+  // line and column.
+  const FileEntry *Entry = PP.getFileManager().getFile(Filename);
+  if (!Entry) {
+    PP.getDiagnostics().Report(diag::err_fe_invalid_code_complete_file)
+      << Filename;
+    return 0;
+  }
+
+  // Truncate the named file at the given line/column.
+  PP.getSourceManager().truncateFileAt(Entry, Line, Column);
+
+  // Set up the creation routine for code-completion.
+  if (UseDebugPrinter)
+    return new PrintingCodeCompleteConsumer(ShowMacros, OS);
+  else
+    return new CIndexCodeCompleteConsumer(ShowMacros, OS);
+}

tools/clang-cc/clang-cc.cpp

@@ -481,36 +481,14 @@ static void ProcessInputFile(CompilerInstance &CI, const std::string &InFile,
     if (InitializeSourceManager(PP, CI.getFrontendOpts(), InFile))
       return;
 
-    llvm::OwningPtr<CodeCompleteConsumer> CCConsumer;
-    if (!FEOpts.CodeCompletionAt.FileName.empty()) {
-      // Tell the source manager to chop off the given file at a specific
-      // line and column.
-      if (const FileEntry *Entry
-            = PP.getFileManager().getFile(FEOpts.CodeCompletionAt.FileName)) {
-        // Truncate the named file at the given line/column.
-        PP.getSourceManager().truncateFileAt(Entry,
-                                             FEOpts.CodeCompletionAt.Line,
-                                             FEOpts.CodeCompletionAt.Column);
-
-        // Set up the creation routine for code-completion.
-        if (FEOpts.DebugCodeCompletionPrinter)
-          CCConsumer.reset(
-            new PrintingCodeCompleteConsumer(FEOpts.ShowMacrosInCodeCompletion,
-                                             llvm::outs()));
-        else
-          CCConsumer.reset(
-            new CIndexCodeCompleteConsumer(FEOpts.ShowMacrosInCodeCompletion,
-                                           llvm::outs()));
-      } else {
-        PP.getDiagnostics().Report(diag::err_fe_invalid_code_complete_file)
-          << FEOpts.CodeCompletionAt.FileName;
-      }
-    }
+    if (!FEOpts.CodeCompletionAt.FileName.empty())
+      CI.createCodeCompletionConsumer();
 
     // Run the AST consumer action.
+    CodeCompleteConsumer *CompletionConsumer =
+      CI.hasCodeCompletionConsumer() ? &CI.getCodeCompletionConsumer() : 0;
     ParseAST(PP, Consumer.get(), CI.getASTContext(), FEOpts.ShowStats,
-             CompleteTranslationUnit,
-             CCConsumer.get());
+             CompleteTranslationUnit, CompletionConsumer);
   } else {
     // Initialize builtin info.
     PP.getBuiltinInfo().InitializeBuiltins(PP.getIdentifierTable(),