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Diffstat (limited to 'deps/v8/src/scanner-base.h')
| -rw-r--r-- | deps/v8/src/scanner-base.h | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/deps/v8/src/scanner-base.h b/deps/v8/src/scanner-base.h deleted file mode 100644 index 500870b575..0000000000 --- a/deps/v8/src/scanner-base.h +++ /dev/null @@ -1,165 +0,0 @@ -// Copyright 2010 the V8 project authors. All rights reserved. -// Redistribution and use in source and binary forms, with or without -// modification, are permitted provided that the following conditions are -// met: -// -// * Redistributions of source code must retain the above copyright -// notice, this list of conditions and the following disclaimer. -// * Redistributions in binary form must reproduce the above -// copyright notice, this list of conditions and the following -// disclaimer in the documentation and/or other materials provided -// with the distribution. -// * Neither the name of Google Inc. nor the names of its -// contributors may be used to endorse or promote products derived -// from this software without specific prior written permission. -// -// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - -// Features shared by parsing and pre-parsing scanners. - -#ifndef V8_SCANNER_BASE_H_ -#define V8_SCANNER_BASE_H_ - -#include "token.h" -#include "unicode.h" - -namespace v8 { -namespace internal { - -class KeywordMatcher { -// Incrementally recognize keywords. -// -// Recognized keywords: -// break case catch const* continue debugger* default delete do else -// finally false for function if in instanceof native* new null -// return switch this throw true try typeof var void while with -// -// *: Actually "future reserved keywords". These are the only ones we -// recognized, the remaining are allowed as identifiers. - public: - KeywordMatcher() - : state_(INITIAL), - token_(Token::IDENTIFIER), - keyword_(NULL), - counter_(0), - keyword_token_(Token::ILLEGAL) {} - - Token::Value token() { return token_; } - - inline void AddChar(unibrow::uchar input) { - if (state_ != UNMATCHABLE) { - Step(input); - } - } - - void Fail() { - token_ = Token::IDENTIFIER; - state_ = UNMATCHABLE; - } - - private: - enum State { - UNMATCHABLE, - INITIAL, - KEYWORD_PREFIX, - KEYWORD_MATCHED, - C, - CA, - CO, - CON, - D, - DE, - F, - I, - IN, - N, - T, - TH, - TR, - V, - W - }; - - struct FirstState { - const char* keyword; - State state; - Token::Value token; - }; - - // Range of possible first characters of a keyword. - static const unsigned int kFirstCharRangeMin = 'b'; - static const unsigned int kFirstCharRangeMax = 'w'; - static const unsigned int kFirstCharRangeLength = - kFirstCharRangeMax - kFirstCharRangeMin + 1; - // State map for first keyword character range. - static FirstState first_states_[kFirstCharRangeLength]; - - // If input equals keyword's character at position, continue matching keyword - // from that position. - inline bool MatchKeywordStart(unibrow::uchar input, - const char* keyword, - int position, - Token::Value token_if_match) { - if (input == static_cast<unibrow::uchar>(keyword[position])) { - state_ = KEYWORD_PREFIX; - this->keyword_ = keyword; - this->counter_ = position + 1; - this->keyword_token_ = token_if_match; - return true; - } - return false; - } - - // If input equals match character, transition to new state and return true. - inline bool MatchState(unibrow::uchar input, char match, State new_state) { - if (input == static_cast<unibrow::uchar>(match)) { - state_ = new_state; - return true; - } - return false; - } - - inline bool MatchKeyword(unibrow::uchar input, - char match, - State new_state, - Token::Value keyword_token) { - if (input != static_cast<unibrow::uchar>(match)) { - return false; - } - state_ = new_state; - token_ = keyword_token; - return true; - } - - void Step(unibrow::uchar input); - - // Current state. - State state_; - // Token for currently added characters. - Token::Value token_; - - // Matching a specific keyword string (there is only one possible valid - // keyword with the current prefix). - const char* keyword_; - int counter_; - Token::Value keyword_token_; -}; - - - - - - -} } // namespace v8::internal - -#endif // V8_SCANNER_BASE_H_ |