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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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542 bool has_multiline_comment_before_next_; | 542 bool has_multiline_comment_before_next_; |
543 }; | 543 }; |
544 | 544 |
545 | 545 |
546 // ---------------------------------------------------------------------------- | 546 // ---------------------------------------------------------------------------- |
547 // Keyword matching state machine. | 547 // Keyword matching state machine. |
548 | 548 |
549 class KeywordMatcher { | 549 class KeywordMatcher { |
550 // Incrementally recognize keywords. | 550 // Incrementally recognize keywords. |
551 // | 551 // |
| 552 // We distinguish between normal future reserved words and words that are |
| 553 // considered to be future reserved words only in strict mode as required by |
| 554 // ECMA-262 7.6.1.2. |
| 555 // |
552 // Recognized as keywords: | 556 // Recognized as keywords: |
553 // break, case, catch, const*, continue, debugger, default, delete, do, | 557 // break, case, catch, const*, continue, debugger, default, delete, do, |
554 // else, finally, false, for, function, if, in, instanceof, new, null, | 558 // else, finally, false, for, function, if, in, instanceof, new, null, |
555 // return, switch, this, throw, true, try, typeof, var, void, while, with. | 559 // return, switch, this, throw, true, try, typeof, var, void, while, with. |
556 // | 560 // |
557 // Recognized as Future Reserved Keywords (normal and strict mode): | 561 // Recognized as Future Reserved Keywords: |
558 // class, enum, export, extends, implements, import, interface, | 562 // class, enum, export, extends, import, super. |
559 // let, package, private, private, protected, public, public, | 563 // |
| 564 // Recognized as Future Reserved Keywords (strict mode only): |
| 565 // implements, interface, let, package, private, protected, public, |
560 // static, yield. | 566 // static, yield. |
561 // | 567 // |
562 // *: Actually a "future reserved keyword". It's the only one we are | 568 // *: Actually a "future reserved keyword". It's the only one we are |
563 // recognizing outside of ES5 strict mode, the remaining are allowed | 569 // recognizing outside of ES5 strict mode, the remaining are allowed |
564 // as identifiers. | 570 // as identifiers. |
565 // | 571 // |
566 public: | 572 public: |
567 KeywordMatcher() | 573 KeywordMatcher() |
568 : state_(INITIAL), | 574 : state_(INITIAL), |
569 token_(Token::IDENTIFIER), | 575 token_(Token::IDENTIFIER), |
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677 // keyword with the current prefix). | 683 // keyword with the current prefix). |
678 const char* keyword_; | 684 const char* keyword_; |
679 int counter_; | 685 int counter_; |
680 Token::Value keyword_token_; | 686 Token::Value keyword_token_; |
681 }; | 687 }; |
682 | 688 |
683 | 689 |
684 } } // namespace v8::internal | 690 } } // namespace v8::internal |
685 | 691 |
686 #endif // V8_SCANNER_BASE_H_ | 692 #endif // V8_SCANNER_BASE_H_ |
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