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| 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
| 2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
| 3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
| 4 | 4 |
| 5 #include "vm/scopes.h" | 5 #include "vm/scopes.h" |
| 6 | 6 |
| 7 #include "vm/object.h" | 7 #include "vm/object.h" |
| 8 #include "vm/stack_frame.h" | 8 #include "vm/stack_frame.h" |
| 9 #include "vm/symbols.h" | 9 #include "vm/symbols.h" |
| 10 | 10 |
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| 91 labels_.Add(label); | 91 labels_.Add(label); |
| 92 if (label->owner() == NULL) { | 92 if (label->owner() == NULL) { |
| 93 // Labels must be added to their owner scope first. Subsequent calls | 93 // Labels must be added to their owner scope first. Subsequent calls |
| 94 // to 'add' treat the label as an alias. | 94 // to 'add' treat the label as an alias. |
| 95 label->set_owner(this); | 95 label->set_owner(this); |
| 96 } | 96 } |
| 97 return true; | 97 return true; |
| 98 } | 98 } |
| 99 | 99 |
| 100 | 100 |
| 101 void LocalScope::MoveLabel(SourceLabel* label) { |
| 102 ASSERT(LocalLookupLabel(label->name()) == NULL); |
| 103 ASSERT(label->kind() == SourceLabel::kForward); |
| 104 labels_.Add(label); |
| 105 label->set_owner(this); |
| 106 } |
| 107 |
| 108 |
| 101 NameReference* LocalScope::FindReference(const String& name) const { | 109 NameReference* LocalScope::FindReference(const String& name) const { |
| 102 ASSERT(name.IsSymbol()); | 110 ASSERT(name.IsSymbol()); |
| 103 intptr_t num_references = referenced_.length(); | 111 intptr_t num_references = referenced_.length(); |
| 104 for (intptr_t i = 0; i < num_references; i++) { | 112 for (intptr_t i = 0; i < num_references; i++) { |
| 105 if (name.raw() == referenced_[i]->name().raw()) { | 113 if (name.raw() == referenced_[i]->name().raw()) { |
| 106 return referenced_[i]; | 114 return referenced_[i]; |
| 107 } | 115 } |
| 108 } | 116 } |
| 109 return NULL; | 117 return NULL; |
| 110 } | 118 } |
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| 482 | 490 |
| 483 | 491 |
| 484 SourceLabel* LocalScope::CheckUnresolvedLabels() { | 492 SourceLabel* LocalScope::CheckUnresolvedLabels() { |
| 485 for (int i = 0; i < this->labels_.length(); i++) { | 493 for (int i = 0; i < this->labels_.length(); i++) { |
| 486 SourceLabel* label = this->labels_[i]; | 494 SourceLabel* label = this->labels_[i]; |
| 487 if (label->kind() == SourceLabel::kForward) { | 495 if (label->kind() == SourceLabel::kForward) { |
| 488 LocalScope* outer_switch = LookupSwitchScope(); | 496 LocalScope* outer_switch = LookupSwitchScope(); |
| 489 if (outer_switch == NULL) { | 497 if (outer_switch == NULL) { |
| 490 return label; | 498 return label; |
| 491 } else { | 499 } else { |
| 492 outer_switch->AddLabel(label); | 500 outer_switch->MoveLabel(label); |
| 493 } | 501 } |
| 494 } | 502 } |
| 495 } | 503 } |
| 496 return NULL; | 504 return NULL; |
| 497 } | 505 } |
| 498 | 506 |
| 499 | 507 |
| 500 int LocalScope::NumCapturedVariables() const { | 508 int LocalScope::NumCapturedVariables() const { |
| 501 // It is not necessary to traverse parent scopes, since we are only interested | 509 // It is not necessary to traverse parent scopes, since we are only interested |
| 502 // in the captured variables referenced in this scope. If this scope is the | 510 // in the captured variables referenced in this scope. If this scope is the |
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| 668 return fixed_parameter_count - (index() - kParamEndSlotFromFp); | 676 return fixed_parameter_count - (index() - kParamEndSlotFromFp); |
| 669 } else { | 677 } else { |
| 670 // Shift negative indexes so that the lowest one is 0 (they are still | 678 // Shift negative indexes so that the lowest one is 0 (they are still |
| 671 // non-positive). | 679 // non-positive). |
| 672 return fixed_parameter_count - (index() - kFirstLocalSlotFromFp); | 680 return fixed_parameter_count - (index() - kFirstLocalSlotFromFp); |
| 673 } | 681 } |
| 674 } | 682 } |
| 675 | 683 |
| 676 | 684 |
| 677 } // namespace dart | 685 } // namespace dart |
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