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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 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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396 // (sorted alphabetically) | 396 // (sorted alphabetically) |
397 | 397 |
398 class FreeStoreAllocationPolicy; | 398 class FreeStoreAllocationPolicy; |
399 template <typename T, class P = FreeStoreAllocationPolicy> class List; | 399 template <typename T, class P = FreeStoreAllocationPolicy> class List; |
400 | 400 |
401 // ----------------------------------------------------------------------------- | 401 // ----------------------------------------------------------------------------- |
402 // Declarations for use in both the preparser and the rest of V8. | 402 // Declarations for use in both the preparser and the rest of V8. |
403 | 403 |
404 // The different language modes that V8 implements. ES5 defines two language | 404 // The different language modes that V8 implements. ES5 defines two language |
405 // modes: an unrestricted mode respectively a strict mode which are indicated by | 405 // modes: an unrestricted mode respectively a strict mode which are indicated by |
406 // CLASSIC_MODE respectively STRICT_MODE in the enum. The harmony spec drafts | 406 // SLOPPY_MODE respectively STRICT_MODE in the enum. The harmony spec drafts |
407 // for the next ES standard specify a new third mode which is called 'extended | 407 // for the next ES standard specify a new third mode which is called 'extended |
408 // mode'. The extended mode is only available if the harmony flag is set. It is | 408 // mode'. The extended mode is only available if the harmony flag is set. It is |
409 // based on the 'strict mode' and adds new functionality to it. This means that | 409 // based on the 'strict mode' and adds new functionality to it. This means that |
410 // most of the semantics of these two modes coincide. | 410 // most of the semantics of these two modes coincide. |
411 // | 411 // TODO(rossberg): remove extended mode. |
Michael Starzinger
2014/02/24 15:09:14
Looking forward to that!
| |
412 // In the current draft the term 'base code' is used to refer to code that is | |
413 // neither in strict nor extended mode. However, the more distinguishing term | |
414 // 'classic mode' is used in V8 instead to avoid mix-ups. | |
415 | 412 |
416 enum LanguageMode { | 413 enum LanguageMode { |
417 CLASSIC_MODE, | 414 SLOPPY_MODE, |
418 STRICT_MODE, | 415 STRICT_MODE, |
419 EXTENDED_MODE | 416 EXTENDED_MODE |
420 }; | 417 }; |
421 | 418 |
422 | 419 |
423 // The Strict Mode (ECMA-262 5th edition, 4.2.2). | 420 // The Strict Mode (ECMA-262 5th edition, 4.2.2). |
424 // | 421 // |
425 // This flag is used in the backend to represent the language mode. So far | 422 // This flag is used in the backend to represent the language mode. So far |
426 // there is no semantic difference between the strict and the extended mode in | 423 // there is no semantic difference between the strict and the extended mode in |
427 // the backend, so both modes are represented by the kStrictMode value. | 424 // the backend, so both modes are represented by the kStrictMode value. |
428 enum StrictModeFlag { | 425 enum StrictModeFlag { |
429 kNonStrictMode, | 426 kSloppyMode, |
430 kStrictMode | 427 kStrictMode |
431 }; | 428 }; |
432 | 429 |
433 | 430 |
434 } } // namespace v8::internal | 431 } } // namespace v8::internal |
435 | 432 |
436 #endif // V8_GLOBALS_H_ | 433 #endif // V8_GLOBALS_H_ |
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