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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2008 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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143 class Expression: public Node { | 143 class Expression: public Node { |
144 public: | 144 public: |
145 virtual Expression* AsExpression() { return this; } | 145 virtual Expression* AsExpression() { return this; } |
146 | 146 |
147 virtual bool IsValidLeftHandSide() { return false; } | 147 virtual bool IsValidLeftHandSide() { return false; } |
148 | 148 |
149 // Mark the expression as being compiled as an expression | 149 // Mark the expression as being compiled as an expression |
150 // statement. This is used to transform postfix increments to | 150 // statement. This is used to transform postfix increments to |
151 // (faster) prefix increments. | 151 // (faster) prefix increments. |
152 virtual void MarkAsStatement() { /* do nothing */ } | 152 virtual void MarkAsStatement() { /* do nothing */ } |
| 153 |
| 154 // Static type information for this expression. |
| 155 StaticType* type() { return &type_; } |
| 156 |
| 157 private: |
| 158 StaticType type_; |
153 }; | 159 }; |
154 | 160 |
155 | 161 |
156 /** | 162 /** |
157 * A sentinel used during pre parsing that represents some expression | 163 * A sentinel used during pre parsing that represents some expression |
158 * that is a valid left hand side without having to actually build | 164 * that is a valid left hand side without having to actually build |
159 * the expression. | 165 * the expression. |
160 */ | 166 */ |
161 class ValidLeftHandSideSentinel: public Expression { | 167 class ValidLeftHandSideSentinel: public Expression { |
162 public: | 168 public: |
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1218 #undef DEF_VISIT | 1224 #undef DEF_VISIT |
1219 | 1225 |
1220 private: | 1226 private: |
1221 bool stack_overflow_; | 1227 bool stack_overflow_; |
1222 }; | 1228 }; |
1223 | 1229 |
1224 | 1230 |
1225 } } // namespace v8::internal | 1231 } } // namespace v8::internal |
1226 | 1232 |
1227 #endif // V8_AST_H_ | 1233 #endif // V8_AST_H_ |
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