[presubmit] Enabling readability/inheritance linter checking.

src/scanner-character-streams.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_SCANNER_CHARACTER_STREAMS_H_
 #define V8_SCANNER_CHARACTER_STREAMS_H_
 
 #include "src/handles.h"
 #include "src/scanner.h"
 #include "src/vector.h"
 
 namespace v8 {
 namespace internal {
 
 // Forward declarations.
 class ExternalTwoByteString;
 
 // A buffered character stream based on a random access character
 // source (ReadBlock can be called with pos_ pointing to any position,
 // even positions before the current).
 class BufferedUtf16CharacterStream: public Utf16CharacterStream {
  public:
   BufferedUtf16CharacterStream();
-  virtual ~BufferedUtf16CharacterStream();
+  ~BufferedUtf16CharacterStream() override;
 
-  virtual void PushBack(uc32 character);
+  void PushBack(uc32 character) override;
 
  protected:
   static const size_t kBufferSize = 512;
   static const size_t kPushBackStepSize = 16;
 
-  virtual size_t SlowSeekForward(size_t delta);
-  virtual bool ReadBlock();
+  size_t SlowSeekForward(size_t delta) override;
+  bool ReadBlock() override;
   virtual void SlowPushBack(uc16 character);
 
   virtual size_t BufferSeekForward(size_t delta) = 0;
   virtual size_t FillBuffer(size_t position) = 0;
 
   const uc16* pushback_limit_;
   uc16 buffer_[kBufferSize];
 };
 
 
 // Generic string stream.
 class GenericStringUtf16CharacterStream: public BufferedUtf16CharacterStream {
  public:
   GenericStringUtf16CharacterStream(Handle<String> data, size_t start_position,
                                     size_t end_position);
-  virtual ~GenericStringUtf16CharacterStream();
+  ~GenericStringUtf16CharacterStream() override;
 
-  virtual bool SetBookmark();
-  virtual void ResetToBookmark();
+  bool SetBookmark() override;
+  void ResetToBookmark() override;
 
  protected:
   static const size_t kNoBookmark = -1;
 
-  virtual size_t BufferSeekForward(size_t delta);
-  virtual size_t FillBuffer(size_t position);
+  size_t BufferSeekForward(size_t delta) override;
+  size_t FillBuffer(size_t position) override;
 
   Handle<String> string_;
   size_t length_;
   size_t bookmark_;
 };
 
 
 // Utf16 stream based on a literal UTF-8 string.
 class Utf8ToUtf16CharacterStream: public BufferedUtf16CharacterStream {
  public:
   Utf8ToUtf16CharacterStream(const byte* data, size_t length);
-  virtual ~Utf8ToUtf16CharacterStream();
+  ~Utf8ToUtf16CharacterStream() override;
 
   static size_t CopyChars(uint16_t* dest, size_t length, const byte* src,
                           size_t* src_pos, size_t src_length);
 
  protected:
-  virtual size_t BufferSeekForward(size_t delta);
-  virtual size_t FillBuffer(size_t char_position);
+  size_t BufferSeekForward(size_t delta) override;
+  size_t FillBuffer(size_t char_position) override;
   void SetRawPosition(size_t char_position);
 
   const byte* raw_data_;
   size_t raw_data_length_;  // Measured in bytes, not characters.
   size_t raw_data_pos_;
   // The character position of the character at raw_data[raw_data_pos_].
   // Not necessarily the same as pos_.
   size_t raw_character_position_;
 };
 
 
 // ExternalStreamingStream is a wrapper around an ExternalSourceStream (see
 // include/v8.h) subclass implemented by the embedder.
 class ExternalStreamingStream : public BufferedUtf16CharacterStream {
  public:
   ExternalStreamingStream(ScriptCompiler::ExternalSourceStream* source_stream,
                           v8::ScriptCompiler::StreamedSource::Encoding encoding)
       : source_stream_(source_stream),
         encoding_(encoding),
         current_data_(NULL),
         current_data_offset_(0),
         current_data_length_(0),
         utf8_split_char_buffer_length_(0),
         bookmark_(0),
         bookmark_data_is_from_current_data_(false),
         bookmark_data_offset_(0),
         bookmark_utf8_split_char_buffer_length_(0) {}
 
-  virtual ~ExternalStreamingStream() {
+  ~ExternalStreamingStream() override {
     delete[] current_data_;
     bookmark_buffer_.Dispose();
     bookmark_data_.Dispose();
   }
 
   size_t BufferSeekForward(size_t delta) override {
     // We never need to seek forward when streaming scripts. We only seek
     // forward when we want to parse a function whose location we already know,
     // and when streaming, we don't know the locations of anything we haven't
     // seen yet.
     UNREACHABLE();
     return 0;
   }
 
   size_t FillBuffer(size_t position) override;
 
-  virtual bool SetBookmark() override;
-  virtual void ResetToBookmark() override;
+  bool SetBookmark() override;
+  void ResetToBookmark() override;
 
  private:
   void HandleUtf8SplitCharacters(size_t* data_in_buffer);
   void FlushCurrent();
 
   ScriptCompiler::ExternalSourceStream* source_stream_;
   v8::ScriptCompiler::StreamedSource::Encoding encoding_;
   const uint8_t* current_data_;
   size_t current_data_offset_;
   size_t current_data_length_;
@@ skipping 12 matching lines @@
   size_t bookmark_utf8_split_char_buffer_length_;
 };
 
 
 // UTF16 buffer to read characters from an external string.
 class ExternalTwoByteStringUtf16CharacterStream: public Utf16CharacterStream {
  public:
   ExternalTwoByteStringUtf16CharacterStream(Handle<ExternalTwoByteString> data,
                                             int start_position,
                                             int end_position);
-  virtual ~ExternalTwoByteStringUtf16CharacterStream();
+  ~ExternalTwoByteStringUtf16CharacterStream() override;
 
-  virtual void PushBack(uc32 character) {
+  void PushBack(uc32 character) override {
     DCHECK(buffer_cursor_ > raw_data_);
     buffer_cursor_--;
     pos_--;
   }
 
-  virtual bool SetBookmark();
-  virtual void ResetToBookmark();
+  bool SetBookmark() override;
+  void ResetToBookmark() override;
 
  protected:
-  virtual size_t SlowSeekForward(size_t delta) {
+  size_t SlowSeekForward(size_t delta) override {
     // Fast case always handles seeking.
     return 0;
   }
-  virtual bool ReadBlock() {
+  bool ReadBlock() override {
     // Entire string is read at start.
     return false;
   }
   Handle<ExternalTwoByteString> source_;
   const uc16* raw_data_;  // Pointer to the actual array of characters.
 
  private:
   static const size_t kNoBookmark = -1;
 
   size_t bookmark_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_SCANNER_CHARACTER_STREAMS_H_