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      1 /*
      2  * Copyright 2010, The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *     http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef _FRAMEWORKS_COMPILE_SLANG_SLANG_DIAGNOSTIC_BUFFER_H_  // NOLINT
     18 #define _FRAMEWORKS_COMPILE_SLANG_SLANG_DIAGNOSTIC_BUFFER_H_
     19 
     20 #include <set>
     21 #include <string>
     22 
     23 #include "clang/Basic/Diagnostic.h"
     24 
     25 #include "llvm/Support/raw_ostream.h"
     26 
     27 namespace llvm {
     28   class raw_string_ostream;
     29 }
     30 
     31 namespace slang {
     32 
     33 // The diagnostics consumer instance (for reading the processed diagnostics)
     34 class DiagnosticBuffer : public clang::DiagnosticConsumer {
     35 private:
     36   // We keed track of the messages that have been already added to this
     37   // diagnostic buffer, to avoid duplicates.  This can happen because for a
     38   // given script we'll usually compile for both 32 and 64 bit targets.
     39   std::set<std::string> mIncludedMessages;
     40   std::string mDiags;
     41   std::unique_ptr<llvm::raw_string_ostream> mSOS;
     42 
     43 public:
     44   DiagnosticBuffer();
     45   virtual ~DiagnosticBuffer();
     46 
     47   virtual void HandleDiagnostic(clang::DiagnosticsEngine::Level DiagLevel,
     48                                 const clang::Diagnostic &Info) override;
     49 
     50   inline const std::string &str() const {
     51     mSOS->flush();
     52     return mDiags;
     53   }
     54 
     55   inline void reset() {
     56     mIncludedMessages.clear();
     57     mSOS.reset();
     58     mDiags.clear();
     59   }
     60 };
     61 
     62 }  // namespace slang
     63 
     64 #endif  // _FRAMEWORKS_COMPILE_SLANG_SLANG_DIAGNOSTIC_BUFFER_H_  NOLINT
     65