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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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464 complete_ = true; | 464 complete_ = true; |
465 } | 465 } |
466 | 466 |
467 private: | 467 private: |
468 JavaScriptScanner* scanner_; | 468 JavaScriptScanner* scanner_; |
469 bool complete_; | 469 bool complete_; |
470 }; | 470 }; |
471 | 471 |
472 explicit JavaScriptScanner(UnicodeCache* scanner_contants); | 472 explicit JavaScriptScanner(UnicodeCache* scanner_contants); |
473 | 473 |
| 474 void Initialize(UC16CharacterStream* source); |
| 475 |
474 // Returns the next token. | 476 // Returns the next token. |
475 Token::Value Next(); | 477 Token::Value Next(); |
476 | 478 |
477 // Returns true if there was a line terminator before the peek'ed token. | 479 // Returns true if there was a line terminator before the peek'ed token. |
478 bool has_line_terminator_before_next() const { | 480 bool has_line_terminator_before_next() const { |
479 return has_line_terminator_before_next_; | 481 return has_line_terminator_before_next_; |
480 } | 482 } |
481 | 483 |
482 // Scans the input as a regular expression pattern, previous | 484 // Scans the input as a regular expression pattern, previous |
483 // character(s) must be /(=). Returns true if a pattern is scanned. | 485 // character(s) must be /(=). Returns true if a pattern is scanned. |
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532 bool has_line_terminator_before_next_; | 534 bool has_line_terminator_before_next_; |
533 }; | 535 }; |
534 | 536 |
535 | 537 |
536 // ---------------------------------------------------------------------------- | 538 // ---------------------------------------------------------------------------- |
537 // Keyword matching state machine. | 539 // Keyword matching state machine. |
538 | 540 |
539 class KeywordMatcher { | 541 class KeywordMatcher { |
540 // Incrementally recognize keywords. | 542 // Incrementally recognize keywords. |
541 // | 543 // |
542 // Recognized keywords: | 544 // Recognized as keywords: |
543 // break case catch const* continue debugger* default delete do else | 545 // break, case, catch, const*, continue, debugger, default, delete, do, |
544 // finally false for function if in instanceof native* new null | 546 // else, finally, false, for, function, if, in, instanceof, new, null, |
545 // return switch this throw true try typeof var void while with | 547 // return, switch, this, throw, true, try, typeof, var, void, while, with. |
546 // | 548 // |
547 // *: Actually "future reserved keywords". These are the only ones we | 549 // Recognized as Future Reserved Keywords (normal and strict mode): |
548 // recognize, the remaining are allowed as identifiers. | 550 // class, enum, export, extends, implements, import, interface, |
549 // In ES5 strict mode, we should disallow all reserved keywords. | 551 // let, package, private, private, protected, public, public, |
| 552 // static, yield. |
| 553 // |
| 554 // *: Actually a "future reserved keyword". It's the only one we are |
| 555 // recognizing outside of ES5 strict mode, the remaining are allowed |
| 556 // as identifiers. |
| 557 // |
550 public: | 558 public: |
551 KeywordMatcher() | 559 KeywordMatcher() |
552 : state_(INITIAL), | 560 : state_(INITIAL), |
553 token_(Token::IDENTIFIER), | 561 token_(Token::IDENTIFIER), |
554 keyword_(NULL), | 562 keyword_(NULL), |
555 counter_(0), | 563 counter_(0), |
556 keyword_token_(Token::ILLEGAL) {} | 564 keyword_token_(Token::ILLEGAL) {} |
557 | 565 |
558 Token::Value token() { return token_; } | 566 Token::Value token() { return token_; } |
559 | 567 |
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661 // keyword with the current prefix). | 669 // keyword with the current prefix). |
662 const char* keyword_; | 670 const char* keyword_; |
663 int counter_; | 671 int counter_; |
664 Token::Value keyword_token_; | 672 Token::Value keyword_token_; |
665 }; | 673 }; |
666 | 674 |
667 | 675 |
668 } } // namespace v8::internal | 676 } } // namespace v8::internal |
669 | 677 |
670 #endif // V8_SCANNER_BASE_H_ | 678 #endif // V8_SCANNER_BASE_H_ |
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