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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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186 | 186 |
187 // --------------------------------------------------------------------------- | 187 // --------------------------------------------------------------------------- |
188 // Scope-specific info. | 188 // Scope-specific info. |
189 | 189 |
190 // Inform the scope that the corresponding code contains a with statement. | 190 // Inform the scope that the corresponding code contains a with statement. |
191 void RecordWithStatement() { scope_contains_with_ = true; } | 191 void RecordWithStatement() { scope_contains_with_ = true; } |
192 | 192 |
193 // Inform the scope that the corresponding code contains an eval call. | 193 // Inform the scope that the corresponding code contains an eval call. |
194 void RecordEvalCall() { scope_calls_eval_ = true; } | 194 void RecordEvalCall() { scope_calls_eval_ = true; } |
195 | 195 |
| 196 // Enable strict mode for the scope (unless disabled by a global flag). |
| 197 void EnableStrictMode() { |
| 198 strict_mode_ = FLAG_strict_mode; |
| 199 } |
196 | 200 |
197 // --------------------------------------------------------------------------- | 201 // --------------------------------------------------------------------------- |
198 // Predicates. | 202 // Predicates. |
199 | 203 |
200 // Specific scope types. | 204 // Specific scope types. |
201 bool is_eval_scope() const { return type_ == EVAL_SCOPE; } | 205 bool is_eval_scope() const { return type_ == EVAL_SCOPE; } |
202 bool is_function_scope() const { return type_ == FUNCTION_SCOPE; } | 206 bool is_function_scope() const { return type_ == FUNCTION_SCOPE; } |
203 bool is_global_scope() const { return type_ == GLOBAL_SCOPE; } | 207 bool is_global_scope() const { return type_ == GLOBAL_SCOPE; } |
| 208 bool is_strict_mode() const { return strict_mode_; } |
204 | 209 |
205 // Information about which scopes calls eval. | 210 // Information about which scopes calls eval. |
206 bool calls_eval() const { return scope_calls_eval_; } | 211 bool calls_eval() const { return scope_calls_eval_; } |
207 bool outer_scope_calls_eval() const { return outer_scope_calls_eval_; } | 212 bool outer_scope_calls_eval() const { return outer_scope_calls_eval_; } |
208 | 213 |
209 // Is this scope inside a with statement. | 214 // Is this scope inside a with statement. |
210 bool inside_with() const { return scope_inside_with_; } | 215 bool inside_with() const { return scope_inside_with_; } |
211 // Does this scope contain a with statement. | 216 // Does this scope contain a with statement. |
212 bool contains_with() const { return scope_contains_with_; } | 217 bool contains_with() const { return scope_contains_with_; } |
213 | 218 |
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356 // Convenience variable; function scopes only. | 361 // Convenience variable; function scopes only. |
357 Variable* arguments_shadow_; | 362 Variable* arguments_shadow_; |
358 | 363 |
359 // Illegal redeclaration. | 364 // Illegal redeclaration. |
360 Expression* illegal_redecl_; | 365 Expression* illegal_redecl_; |
361 | 366 |
362 // Scope-specific information. | 367 // Scope-specific information. |
363 bool scope_inside_with_; // this scope is inside a 'with' of some outer scope | 368 bool scope_inside_with_; // this scope is inside a 'with' of some outer scope |
364 bool scope_contains_with_; // this scope contains a 'with' statement | 369 bool scope_contains_with_; // this scope contains a 'with' statement |
365 bool scope_calls_eval_; // this scope contains an 'eval' call | 370 bool scope_calls_eval_; // this scope contains an 'eval' call |
| 371 bool strict_mode_; // this scope is a strict mode scope |
366 | 372 |
367 // Computed via PropagateScopeInfo. | 373 // Computed via PropagateScopeInfo. |
368 bool outer_scope_calls_eval_; | 374 bool outer_scope_calls_eval_; |
369 bool inner_scope_calls_eval_; | 375 bool inner_scope_calls_eval_; |
370 bool outer_scope_is_eval_scope_; | 376 bool outer_scope_is_eval_scope_; |
371 bool force_eager_compilation_; | 377 bool force_eager_compilation_; |
372 | 378 |
373 // Computed via AllocateVariables; function scopes only. | 379 // Computed via AllocateVariables; function scopes only. |
374 int num_stack_slots_; | 380 int num_stack_slots_; |
375 int num_heap_slots_; | 381 int num_heap_slots_; |
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421 scope_name_ = Factory::empty_symbol(); | 427 scope_name_ = Factory::empty_symbol(); |
422 dynamics_ = NULL; | 428 dynamics_ = NULL; |
423 receiver_ = NULL; | 429 receiver_ = NULL; |
424 function_ = NULL; | 430 function_ = NULL; |
425 arguments_ = NULL; | 431 arguments_ = NULL; |
426 arguments_shadow_ = NULL; | 432 arguments_shadow_ = NULL; |
427 illegal_redecl_ = NULL; | 433 illegal_redecl_ = NULL; |
428 scope_inside_with_ = false; | 434 scope_inside_with_ = false; |
429 scope_contains_with_ = false; | 435 scope_contains_with_ = false; |
430 scope_calls_eval_ = false; | 436 scope_calls_eval_ = false; |
| 437 // Inherit the strict mode from the parent scope. |
| 438 strict_mode_ = (outer_scope != NULL) && outer_scope->strict_mode_; |
431 outer_scope_calls_eval_ = false; | 439 outer_scope_calls_eval_ = false; |
432 inner_scope_calls_eval_ = false; | 440 inner_scope_calls_eval_ = false; |
433 outer_scope_is_eval_scope_ = false; | 441 outer_scope_is_eval_scope_ = false; |
434 force_eager_compilation_ = false; | 442 force_eager_compilation_ = false; |
435 num_stack_slots_ = 0; | 443 num_stack_slots_ = 0; |
436 num_heap_slots_ = 0; | 444 num_heap_slots_ = 0; |
437 scope_info_ = scope_info; | 445 scope_info_ = scope_info; |
438 } | 446 } |
439 }; | 447 }; |
440 | 448 |
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485 int nesting_level_; | 493 int nesting_level_; |
486 // Nesting level of outermost scope that is contained in a with statement, | 494 // Nesting level of outermost scope that is contained in a with statement, |
487 // or kNotInsideWith if there are no with's around the current scope. | 495 // or kNotInsideWith if there are no with's around the current scope. |
488 int inside_with_level_; | 496 int inside_with_level_; |
489 }; | 497 }; |
490 | 498 |
491 | 499 |
492 } } // namespace v8::internal | 500 } } // namespace v8::internal |
493 | 501 |
494 #endif // V8_SCOPES_H_ | 502 #endif // V8_SCOPES_H_ |
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