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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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| 137 // Private constructor only used in PreParseProgram. | 137 // Private constructor only used in PreParseProgram. |
| 138 PreParser(i::JavaScriptScanner* scanner, | 138 PreParser(i::JavaScriptScanner* scanner, |
| 139 i::ParserRecorder* log, | 139 i::ParserRecorder* log, |
| 140 uintptr_t stack_limit, | 140 uintptr_t stack_limit, |
| 141 bool allow_lazy) | 141 bool allow_lazy) |
| 142 : scanner_(scanner), | 142 : scanner_(scanner), |
| 143 log_(log), | 143 log_(log), |
| 144 scope_(NULL), | 144 scope_(NULL), |
| 145 stack_limit_(stack_limit), | 145 stack_limit_(stack_limit), |
| 146 stack_overflow_(false), | 146 stack_overflow_(false), |
| 147 allow_lazy_(true) { } | 147 allow_lazy_(true), |
| 148 parenthesized_function_(false) { } |
| 148 | 149 |
| 149 // Preparse the program. Only called in PreParseProgram after creating | 150 // Preparse the program. Only called in PreParseProgram after creating |
| 150 // the instance. | 151 // the instance. |
| 151 PreParseResult PreParse() { | 152 PreParseResult PreParse() { |
| 152 Scope top_scope(&scope_, kTopLevelScope); | 153 Scope top_scope(&scope_, kTopLevelScope); |
| 153 bool ok = true; | 154 bool ok = true; |
| 154 ParseSourceElements(i::Token::EOS, &ok); | 155 ParseSourceElements(i::Token::EOS, &ok); |
| 155 if (stack_overflow_) return kPreParseStackOverflow; | 156 if (stack_overflow_) return kPreParseStackOverflow; |
| 156 if (!ok) { | 157 if (!ok) { |
| 157 ReportUnexpectedToken(scanner_->current_token()); | 158 ReportUnexpectedToken(scanner_->current_token()); |
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| 235 if (reinterpret_cast<uintptr_t>(&marker) < stack_limit_) { | 236 if (reinterpret_cast<uintptr_t>(&marker) < stack_limit_) { |
| 236 // Further calls to peek/Next will return illegal token. | 237 // Further calls to peek/Next will return illegal token. |
| 237 // The current one will still be returned. It might already | 238 // The current one will still be returned. It might already |
| 238 // have been seen using peek. | 239 // have been seen using peek. |
| 239 stack_overflow_ = true; | 240 stack_overflow_ = true; |
| 240 } | 241 } |
| 241 } | 242 } |
| 242 return scanner_->Next(); | 243 return scanner_->Next(); |
| 243 } | 244 } |
| 244 | 245 |
| 246 bool peek_any_identifier(); |
| 247 |
| 245 void Consume(i::Token::Value token) { Next(); } | 248 void Consume(i::Token::Value token) { Next(); } |
| 246 | 249 |
| 247 void Expect(i::Token::Value token, bool* ok) { | 250 void Expect(i::Token::Value token, bool* ok) { |
| 248 if (Next() != token) { | 251 if (Next() != token) { |
| 249 *ok = false; | 252 *ok = false; |
| 250 } | 253 } |
| 251 } | 254 } |
| 252 | 255 |
| 253 bool Check(i::Token::Value token) { | 256 bool Check(i::Token::Value token) { |
| 254 i::Token::Value next = peek(); | 257 i::Token::Value next = peek(); |
| 255 if (next == token) { | 258 if (next == token) { |
| 256 Consume(next); | 259 Consume(next); |
| 257 return true; | 260 return true; |
| 258 } | 261 } |
| 259 return false; | 262 return false; |
| 260 } | 263 } |
| 261 void ExpectSemicolon(bool* ok); | 264 void ExpectSemicolon(bool* ok); |
| 262 | 265 |
| 263 static int Precedence(i::Token::Value tok, bool accept_IN); | 266 static int Precedence(i::Token::Value tok, bool accept_IN); |
| 264 | 267 |
| 265 i::JavaScriptScanner* scanner_; | 268 i::JavaScriptScanner* scanner_; |
| 266 i::ParserRecorder* log_; | 269 i::ParserRecorder* log_; |
| 267 Scope* scope_; | 270 Scope* scope_; |
| 268 uintptr_t stack_limit_; | 271 uintptr_t stack_limit_; |
| 269 bool stack_overflow_; | 272 bool stack_overflow_; |
| 270 bool allow_lazy_; | 273 bool allow_lazy_; |
| 274 bool parenthesized_function_; |
| 271 }; | 275 }; |
| 272 } } // v8::preparser | 276 } } // v8::preparser |
| 273 | 277 |
| 274 #endif // V8_PREPARSER_H | 278 #endif // V8_PREPARSER_H |
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