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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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354 // ----------------------------------------------------------------------------- | 354 // ----------------------------------------------------------------------------- |
355 // Forward declarations for frequently used classes | 355 // Forward declarations for frequently used classes |
356 // (sorted alphabetically) | 356 // (sorted alphabetically) |
357 | 357 |
358 class FreeStoreAllocationPolicy; | 358 class FreeStoreAllocationPolicy; |
359 template <typename T, class P = FreeStoreAllocationPolicy> class List; | 359 template <typename T, class P = FreeStoreAllocationPolicy> class List; |
360 | 360 |
361 // ----------------------------------------------------------------------------- | 361 // ----------------------------------------------------------------------------- |
362 // Declarations for use in both the preparser and the rest of V8. | 362 // Declarations for use in both the preparser and the rest of V8. |
363 | 363 |
| 364 // The different language modes that V8 implements. ES5 defines two language |
| 365 // modes: an unrestricted mode respectively a strict mode which are indicated by |
| 366 // CLASSIC_MODE respectively STRICT_MODE in the enum. The harmony spec drafts |
| 367 // for the next ES standard specify a new third mode which is called 'extended |
| 368 // mode'. The extended mode is only available if the harmony flag is set. It is |
| 369 // based on the 'strict mode' and adds new functionality to it. This means that |
| 370 // most of the semantics of these two modes coincide. |
| 371 // |
| 372 // In the current draft the term 'base code' is used to refer to code that is |
| 373 // neither in strict nor extended mode. However, the more distinguishing term |
| 374 // 'classic mode' is used in V8 instead to avoid mix-ups. |
| 375 |
| 376 enum LanguageMode { |
| 377 CLASSIC_MODE, |
| 378 STRICT_MODE, |
| 379 EXTENDED_MODE |
| 380 }; |
| 381 |
| 382 |
364 // The Strict Mode (ECMA-262 5th edition, 4.2.2). | 383 // The Strict Mode (ECMA-262 5th edition, 4.2.2). |
| 384 // |
| 385 // This flag is used in the backend to represent the language mode. So far |
| 386 // there is no semantic difference between the strict and the extended mode in |
| 387 // the backend, so both modes are represented by the kStrictMode value. |
365 enum StrictModeFlag { | 388 enum StrictModeFlag { |
366 kNonStrictMode, | 389 kNonStrictMode, |
367 kStrictMode | 390 kStrictMode |
368 }; | 391 }; |
369 | 392 |
370 | 393 |
371 } } // namespace v8::internal | 394 } } // namespace v8::internal |
372 | 395 |
373 #endif // V8_GLOBALS_H_ | 396 #endif // V8_GLOBALS_H_ |
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