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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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557 | 557 |
558 LiteralScope literal(this); | 558 LiteralScope literal(this); |
559 if (seen_period) { | 559 if (seen_period) { |
560 // we have already seen a decimal point of the float | 560 // we have already seen a decimal point of the float |
561 AddLiteralChar('.'); | 561 AddLiteralChar('.'); |
562 ScanDecimalDigits(); // we know we have at least one digit | 562 ScanDecimalDigits(); // we know we have at least one digit |
563 | 563 |
564 } else { | 564 } else { |
565 // if the first character is '0' we must check for octals and hex | 565 // if the first character is '0' we must check for octals and hex |
566 if (c0_ == '0') { | 566 if (c0_ == '0') { |
| 567 int start_pos = source_pos(); // For reporting octal positions. |
567 AddLiteralCharAdvance(); | 568 AddLiteralCharAdvance(); |
568 | 569 |
569 // either 0, 0exxx, 0Exxx, 0.xxx, an octal number, or a hex number | 570 // either 0, 0exxx, 0Exxx, 0.xxx, an octal number, or a hex number |
570 if (c0_ == 'x' || c0_ == 'X') { | 571 if (c0_ == 'x' || c0_ == 'X') { |
571 // hex number | 572 // hex number |
572 kind = HEX; | 573 kind = HEX; |
573 AddLiteralCharAdvance(); | 574 AddLiteralCharAdvance(); |
574 if (!IsHexDigit(c0_)) { | 575 if (!IsHexDigit(c0_)) { |
575 // we must have at least one hex digit after 'x'/'X' | 576 // we must have at least one hex digit after 'x'/'X' |
576 return Token::ILLEGAL; | 577 return Token::ILLEGAL; |
577 } | 578 } |
578 while (IsHexDigit(c0_)) { | 579 while (IsHexDigit(c0_)) { |
579 AddLiteralCharAdvance(); | 580 AddLiteralCharAdvance(); |
580 } | 581 } |
581 } else if ('0' <= c0_ && c0_ <= '7') { | 582 } else if ('0' <= c0_ && c0_ <= '7') { |
582 // (possible) octal number | 583 // (possible) octal number |
583 kind = OCTAL; | 584 kind = OCTAL; |
584 while (true) { | 585 while (true) { |
585 if (c0_ == '8' || c0_ == '9') { | 586 if (c0_ == '8' || c0_ == '9') { |
586 kind = DECIMAL; | 587 kind = DECIMAL; |
587 break; | 588 break; |
588 } | 589 } |
589 if (c0_ < '0' || '7' < c0_) { | 590 if (c0_ < '0' || '7' < c0_) { |
590 // Octal literal finished. | 591 // Octal literal finished. |
591 octal_pos_ = next_.location; | 592 octal_pos_ = Location(start_pos, source_pos()); |
592 break; | 593 break; |
593 } | 594 } |
594 AddLiteralCharAdvance(); | 595 AddLiteralCharAdvance(); |
595 } | 596 } |
596 } | 597 } |
597 } | 598 } |
598 | 599 |
599 // Parse decimal digits and allow trailing fractional part. | 600 // Parse decimal digits and allow trailing fractional part. |
600 if (kind == DECIMAL) { | 601 if (kind == DECIMAL) { |
601 ScanDecimalDigits(); // optional | 602 ScanDecimalDigits(); // optional |
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942 if (MatchKeywordStart(input, "with", 1, Token::WITH)) return; | 943 if (MatchKeywordStart(input, "with", 1, Token::WITH)) return; |
943 break; | 944 break; |
944 case UNMATCHABLE: | 945 case UNMATCHABLE: |
945 break; | 946 break; |
946 } | 947 } |
947 // On fallthrough, it's a failure. | 948 // On fallthrough, it's a failure. |
948 state_ = UNMATCHABLE; | 949 state_ = UNMATCHABLE; |
949 } | 950 } |
950 | 951 |
951 } } // namespace v8::internal | 952 } } // namespace v8::internal |
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