1 // Copyright 2011 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "src/v8.h" 6 7 #include "src/ast.h" 8 #include "src/scopes.h" 9 #include "src/variables.h" 10 11 namespace v8 { 12 namespace internal { 13 14 // ---------------------------------------------------------------------------- 15 // Implementation Variable. 16 17 const char* Variable::Mode2String(VariableMode mode) { 18 switch (mode) { 19 case VAR: return "VAR"; 20 case CONST_LEGACY: return "CONST_LEGACY"; 21 case LET: return "LET"; 22 case CONST: return "CONST"; 23 case MODULE: return "MODULE"; 24 case DYNAMIC: return "DYNAMIC"; 25 case DYNAMIC_GLOBAL: return "DYNAMIC_GLOBAL"; 26 case DYNAMIC_LOCAL: return "DYNAMIC_LOCAL"; 27 case INTERNAL: return "INTERNAL"; 28 case TEMPORARY: return "TEMPORARY"; 29 } 30 UNREACHABLE(); 31 return NULL; 32 } 33 34 35 Variable::Variable(Scope* scope, 36 Handle<String> name, 37 VariableMode mode, 38 bool is_valid_ref, 39 Kind kind, 40 InitializationFlag initialization_flag, 41 Interface* interface) 42 : scope_(scope), 43 name_(name), 44 mode_(mode), 45 kind_(kind), 46 location_(UNALLOCATED), 47 index_(-1), 48 initializer_position_(RelocInfo::kNoPosition), 49 local_if_not_shadowed_(NULL), 50 is_valid_ref_(is_valid_ref), 51 force_context_allocation_(false), 52 is_used_(false), 53 initialization_flag_(initialization_flag), 54 interface_(interface) { 55 // Names must be canonicalized for fast equality checks. 56 ASSERT(name->IsInternalizedString()); 57 // Var declared variables never need initialization. 58 ASSERT(!(mode == VAR && initialization_flag == kNeedsInitialization)); 59 } 60 61 62 bool Variable::IsGlobalObjectProperty() const { 63 // Temporaries are never global, they must always be allocated in the 64 // activation frame. 65 return (IsDynamicVariableMode(mode_) || 66 (IsDeclaredVariableMode(mode_) && !IsLexicalVariableMode(mode_))) 67 && scope_ != NULL && scope_->is_global_scope(); 68 } 69 70 71 int Variable::CompareIndex(Variable* const* v, Variable* const* w) { 72 int x = (*v)->index(); 73 int y = (*w)->index(); 74 // Consider sorting them according to type as well? 75 return x - y; 76 } 77 78 } } // namespace v8::internal 79
