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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 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // Features shared by parsing and pre-parsing scanners. | 5 // Features shared by parsing and pre-parsing scanners. |
6 | 6 |
7 #ifndef V8_PARSING_SCANNER_H_ | 7 #ifndef V8_PARSING_SCANNER_H_ |
8 #define V8_PARSING_SCANNER_H_ | 8 #define V8_PARSING_SCANNER_H_ |
9 | 9 |
10 #include "src/allocation.h" | 10 #include "src/allocation.h" |
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202 // Returns the next token and advances input. | 202 // Returns the next token and advances input. |
203 Token::Value Next(); | 203 Token::Value Next(); |
204 // Returns the token following peek() | 204 // Returns the token following peek() |
205 Token::Value PeekAhead(); | 205 Token::Value PeekAhead(); |
206 // Returns the current token again. | 206 // Returns the current token again. |
207 Token::Value current_token() { return current_.token; } | 207 Token::Value current_token() { return current_.token; } |
208 // Returns the location information for the current token | 208 // Returns the location information for the current token |
209 // (the token last returned by Next()). | 209 // (the token last returned by Next()). |
210 Location location() const { return current_.location; } | 210 Location location() const { return current_.location; } |
211 | 211 |
| 212 // This error is specifically an invalid hex or unicode escape sequence. |
212 bool has_error() const { return scanner_error_ != MessageTemplate::kNone; } | 213 bool has_error() const { return scanner_error_ != MessageTemplate::kNone; } |
213 MessageTemplate::Template error() const { return scanner_error_; } | 214 MessageTemplate::Template error() const { return scanner_error_; } |
214 Location error_location() const { return scanner_error_location_; } | 215 Location error_location() const { return scanner_error_location_; } |
215 | 216 |
| 217 bool has_invalid_template_escape() const { |
| 218 return invalid_template_escape_message_ != MessageTemplate::kNone; |
| 219 } |
| 220 MessageTemplate::Template invalid_template_escape_message() const { |
| 221 return invalid_template_escape_message_; |
| 222 } |
| 223 Location invalid_template_escape_location() const { |
| 224 return invalid_template_escape_location_; |
| 225 } |
| 226 |
| 227 void clear_invalid_template_escape() { |
| 228 DCHECK(has_invalid_template_escape()); |
| 229 invalid_template_escape_message_ = MessageTemplate::kNone; |
| 230 invalid_template_escape_location_ = Location::invalid(); |
| 231 } |
| 232 |
216 // Similar functions for the upcoming token. | 233 // Similar functions for the upcoming token. |
217 | 234 |
218 // One token look-ahead (past the token returned by Next()). | 235 // One token look-ahead (past the token returned by Next()). |
219 Token::Value peek() const { return next_.token; } | 236 Token::Value peek() const { return next_.token; } |
220 | 237 |
221 Location peek_location() const { return next_.location; } | 238 Location peek_location() const { return next_.location; } |
222 | 239 |
223 bool literal_contains_escapes() const { | 240 bool literal_contains_escapes() const { |
224 return LiteralContainsEscapes(current_); | 241 return LiteralContainsEscapes(current_); |
225 } | 242 } |
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459 current_.literal_chars = NULL; | 476 current_.literal_chars = NULL; |
460 current_.raw_literal_chars = NULL; | 477 current_.raw_literal_chars = NULL; |
461 next_.token = Token::UNINITIALIZED; | 478 next_.token = Token::UNINITIALIZED; |
462 next_.literal_chars = NULL; | 479 next_.literal_chars = NULL; |
463 next_.raw_literal_chars = NULL; | 480 next_.raw_literal_chars = NULL; |
464 next_next_.token = Token::UNINITIALIZED; | 481 next_next_.token = Token::UNINITIALIZED; |
465 next_next_.literal_chars = NULL; | 482 next_next_.literal_chars = NULL; |
466 next_next_.raw_literal_chars = NULL; | 483 next_next_.raw_literal_chars = NULL; |
467 found_html_comment_ = false; | 484 found_html_comment_ = false; |
468 scanner_error_ = MessageTemplate::kNone; | 485 scanner_error_ = MessageTemplate::kNone; |
| 486 invalid_template_escape_message_ = MessageTemplate::kNone; |
469 } | 487 } |
470 | 488 |
471 void ReportScannerError(const Location& location, | 489 void ReportScannerError(const Location& location, |
472 MessageTemplate::Template error) { | 490 MessageTemplate::Template error) { |
473 if (has_error()) return; | 491 if (has_error()) return; |
474 scanner_error_ = error; | 492 scanner_error_ = error; |
475 scanner_error_location_ = location; | 493 scanner_error_location_ = location; |
476 } | 494 } |
477 | 495 |
478 void ReportScannerError(int pos, MessageTemplate::Template error) { | 496 void ReportScannerError(int pos, MessageTemplate::Template error) { |
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749 // Whether there is a multi-line comment that contains a | 767 // Whether there is a multi-line comment that contains a |
750 // line-terminator after the current token, and before the next. | 768 // line-terminator after the current token, and before the next. |
751 bool has_multiline_comment_before_next_; | 769 bool has_multiline_comment_before_next_; |
752 bool has_line_terminator_after_next_; | 770 bool has_line_terminator_after_next_; |
753 | 771 |
754 // Whether this scanner encountered an HTML comment. | 772 // Whether this scanner encountered an HTML comment. |
755 bool found_html_comment_; | 773 bool found_html_comment_; |
756 | 774 |
757 MessageTemplate::Template scanner_error_; | 775 MessageTemplate::Template scanner_error_; |
758 Location scanner_error_location_; | 776 Location scanner_error_location_; |
| 777 |
| 778 MessageTemplate::Template invalid_template_escape_message_; |
| 779 Location invalid_template_escape_location_; |
759 }; | 780 }; |
760 | 781 |
761 } // namespace internal | 782 } // namespace internal |
762 } // namespace v8 | 783 } // namespace v8 |
763 | 784 |
764 #endif // V8_PARSING_SCANNER_H_ | 785 #endif // V8_PARSING_SCANNER_H_ |
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