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1 // Copyright 2010 the V8 project authors. All rights reserved. | 1 // Copyright 2010 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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290 unibrow::CharacterStream* stream, | 290 unibrow::CharacterStream* stream, |
291 ParserLanguage language); | 291 ParserLanguage language); |
292 void Initialize(Handle<String> source, | 292 void Initialize(Handle<String> source, |
293 int start_position, int end_position, | 293 int start_position, int end_position, |
294 ParserLanguage language); | 294 ParserLanguage language); |
295 | 295 |
296 // Returns the next token. | 296 // Returns the next token. |
297 Token::Value Next(); | 297 Token::Value Next(); |
298 | 298 |
299 // One token look-ahead (past the token returned by Next()). | 299 // One token look-ahead (past the token returned by Next()). |
300 Token::Value peek() const { return next_.token; } | 300 Token::Value peek() const { return next_.token; } |
301 | 301 |
302 // Returns true if there was a line terminator before the peek'ed token. | 302 // Returns true if there was a line terminator before the peek'ed token. |
303 bool has_line_terminator_before_next() const { | 303 bool has_line_terminator_before_next() const { |
304 return has_line_terminator_before_next_; | 304 return has_line_terminator_before_next_; |
305 } | 305 } |
306 | 306 |
307 struct Location { | 307 struct Location { |
308 Location(int b, int e) : beg_pos(b), end_pos(e) { } | 308 Location(int b, int e) : beg_pos(b), end_pos(e) { } |
309 Location() : beg_pos(0), end_pos(0) { } | 309 Location() : beg_pos(0), end_pos(0) { } |
310 int beg_pos; | 310 int beg_pos; |
311 int end_pos; | 311 int end_pos; |
312 }; | 312 }; |
313 | 313 |
314 // Returns the location information for the current token | 314 // Returns the location information for the current token |
315 // (the token returned by Next()). | 315 // (the token returned by Next()). |
316 Location location() const { return current_.location; } | 316 Location location() const { return current_.location; } |
317 Location peek_location() const { return next_.location; } | 317 Location peek_location() const { return next_.location; } |
318 | 318 |
319 // Returns the literal string, if any, for the current token (the | 319 // Returns the literal string, if any, for the current token (the |
320 // token returned by Next()). The string is 0-terminated and in | 320 // token returned by Next()). The string is 0-terminated and in |
321 // UTF-8 format; they may contain 0-characters. Literal strings are | 321 // UTF-8 format; they may contain 0-characters. Literal strings are |
322 // collected for identifiers, strings, and numbers. | 322 // collected for identifiers, strings, and numbers. |
323 // These functions only give the correct result if the literal | 323 // These functions only give the correct result if the literal |
324 // was scanned between calls to StartLiteral() and TerminateLiteral(). | 324 // was scanned between calls to StartLiteral() and TerminateLiteral(). |
325 const char* literal_string() const { | 325 const char* literal_string() const { |
326 return current_.literal_chars.start(); | 326 return current_.literal_chars.start(); |
327 } | 327 } |
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510 bool stack_overflow_; | 510 bool stack_overflow_; |
511 static StaticResource<Utf8Decoder> utf8_decoder_; | 511 static StaticResource<Utf8Decoder> utf8_decoder_; |
512 | 512 |
513 // One Unicode character look-ahead; c0_ < 0 at the end of the input. | 513 // One Unicode character look-ahead; c0_ < 0 at the end of the input. |
514 uc32 c0_; | 514 uc32 c0_; |
515 }; | 515 }; |
516 | 516 |
517 } } // namespace v8::internal | 517 } } // namespace v8::internal |
518 | 518 |
519 #endif // V8_SCANNER_H_ | 519 #endif // V8_SCANNER_H_ |
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