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Issue 7992005: Block scoped const variables. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Comments, function variable mode, preparser. Created 9 years, 1 month ago
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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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111 bool IsStackLocal() const { return location_ == LOCAL; } 111 bool IsStackLocal() const { return location_ == LOCAL; }
112 bool IsStackAllocated() const { return IsParameter() || IsStackLocal(); } 112 bool IsStackAllocated() const { return IsParameter() || IsStackLocal(); }
113 bool IsContextSlot() const { return location_ == CONTEXT; } 113 bool IsContextSlot() const { return location_ == CONTEXT; }
114 bool IsLookupSlot() const { return location_ == LOOKUP; } 114 bool IsLookupSlot() const { return location_ == LOOKUP; }
115 115
116 bool is_dynamic() const { 116 bool is_dynamic() const {
117 return (mode_ == DYNAMIC || 117 return (mode_ == DYNAMIC ||
118 mode_ == DYNAMIC_GLOBAL || 118 mode_ == DYNAMIC_GLOBAL ||
119 mode_ == DYNAMIC_LOCAL); 119 mode_ == DYNAMIC_LOCAL);
120 } 120 }
121 bool is_const_mode() const {
122 return (mode_ == CONST ||
123 mode_ == CONST_HARMONY);
124 }
125 bool binding_needs_init() const {
126 return (mode_ == LET ||
127 mode_ == CONST ||
128 mode_ == CONST_HARMONY);
129 }
121 130
122 bool is_global() const; 131 bool is_global() const;
123 bool is_this() const { return kind_ == THIS; } 132 bool is_this() const { return kind_ == THIS; }
124 bool is_arguments() const { return kind_ == ARGUMENTS; } 133 bool is_arguments() const { return kind_ == ARGUMENTS; }
125 134
126 // True if the variable is named eval and not known to be shadowed. 135 // True if the variable is named eval and not known to be shadowed.
127 bool is_possibly_eval() const { 136 bool is_possibly_eval() const {
128 return IsVariable(FACTORY->eval_symbol()) && 137 return IsVariable(FACTORY->eval_symbol()) &&
129 (mode_ == DYNAMIC || mode_ == DYNAMIC_GLOBAL); 138 (mode_ == DYNAMIC || mode_ == DYNAMIC_GLOBAL);
130 } 139 }
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165 174
166 // Usage info. 175 // Usage info.
167 bool is_accessed_from_inner_scope_; // set by variable resolver 176 bool is_accessed_from_inner_scope_; // set by variable resolver
168 bool is_used_; 177 bool is_used_;
169 }; 178 };
170 179
171 180
172 } } // namespace v8::internal 181 } } // namespace v8::internal
173 182
174 #endif // V8_VARIABLES_H_ 183 #endif // V8_VARIABLES_H_
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