ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1 | // Copyright 2011 the V8 project authors. All rights reserved. |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #include "../include/v8stdint.h" |
| 29 | #include "unicode.h" |
| 30 | #include "globals.h" |
| 31 | #include "checks.h" |
| 32 | #include "allocation.h" |
| 33 | #include "utils.h" |
| 34 | #include "list.h" |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 35 | |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 36 | #include "scanner-base.h" |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 37 | #include "preparse-data-format.h" |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 38 | #include "preparse-data.h" |
| 39 | #include "preparser.h" |
| 40 | |
jkummerow@chromium.org | ddda9e8 | 2011-07-06 11:27:02 +0000 | [diff] [blame] | 41 | #include "conversions-inl.h" |
| 42 | |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 43 | namespace v8 { |
| 44 | namespace preparser { |
| 45 | |
| 46 | // Preparsing checks a JavaScript program and emits preparse-data that helps |
| 47 | // a later parsing to be faster. |
| 48 | // See preparser-data.h for the data. |
| 49 | |
| 50 | // The PreParser checks that the syntax follows the grammar for JavaScript, |
| 51 | // and collects some information about the program along the way. |
| 52 | // The grammar check is only performed in order to understand the program |
| 53 | // sufficiently to deduce some information about it, that can be used |
| 54 | // to speed up later parsing. Finding errors is not the goal of pre-parsing, |
| 55 | // rather it is to speed up properly written and correct programs. |
| 56 | // That means that contextual checks (like a label being declared where |
| 57 | // it is used) are generally omitted. |
| 58 | |
| 59 | namespace i = ::v8::internal; |
| 60 | |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 61 | void PreParser::ReportUnexpectedToken(i::Token::Value token) { |
| 62 | // We don't report stack overflows here, to avoid increasing the |
| 63 | // stack depth even further. Instead we report it after parsing is |
| 64 | // over, in ParseProgram. |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 65 | if (token == i::Token::ILLEGAL && stack_overflow_) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 66 | return; |
| 67 | } |
| 68 | i::JavaScriptScanner::Location source_location = scanner_->location(); |
| 69 | |
| 70 | // Four of the tokens are treated specially |
| 71 | switch (token) { |
| 72 | case i::Token::EOS: |
| 73 | return ReportMessageAt(source_location.beg_pos, source_location.end_pos, |
| 74 | "unexpected_eos", NULL); |
| 75 | case i::Token::NUMBER: |
| 76 | return ReportMessageAt(source_location.beg_pos, source_location.end_pos, |
| 77 | "unexpected_token_number", NULL); |
| 78 | case i::Token::STRING: |
| 79 | return ReportMessageAt(source_location.beg_pos, source_location.end_pos, |
| 80 | "unexpected_token_string", NULL); |
| 81 | case i::Token::IDENTIFIER: |
| 82 | return ReportMessageAt(source_location.beg_pos, source_location.end_pos, |
| 83 | "unexpected_token_identifier", NULL); |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 84 | case i::Token::FUTURE_RESERVED_WORD: |
| 85 | return ReportMessageAt(source_location.beg_pos, source_location.end_pos, |
| 86 | "unexpected_reserved", NULL); |
| 87 | case i::Token::FUTURE_STRICT_RESERVED_WORD: |
| 88 | return ReportMessageAt(source_location.beg_pos, source_location.end_pos, |
| 89 | "unexpected_strict_reserved", NULL); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 90 | default: |
| 91 | const char* name = i::Token::String(token); |
| 92 | ReportMessageAt(source_location.beg_pos, source_location.end_pos, |
| 93 | "unexpected_token", name); |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 98 | // Checks whether octal literal last seen is between beg_pos and end_pos. |
| 99 | // If so, reports an error. |
| 100 | void PreParser::CheckOctalLiteral(int beg_pos, int end_pos, bool* ok) { |
| 101 | i::Scanner::Location octal = scanner_->octal_position(); |
| 102 | if (beg_pos <= octal.beg_pos && octal.end_pos <= end_pos) { |
| 103 | ReportMessageAt(octal.beg_pos, octal.end_pos, "strict_octal_literal", NULL); |
| 104 | scanner_->clear_octal_position(); |
| 105 | *ok = false; |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 110 | #define CHECK_OK ok); \ |
| 111 | if (!*ok) return kUnknownSourceElements; \ |
| 112 | ((void)0 |
| 113 | #define DUMMY ) // to make indentation work |
| 114 | #undef DUMMY |
| 115 | |
| 116 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 117 | PreParser::SourceElements PreParser::ParseSourceElements(int end_token, |
| 118 | bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 119 | // SourceElements :: |
| 120 | // (Statement)* <end_token> |
| 121 | |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 122 | bool allow_directive_prologue = true; |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 123 | while (peek() != end_token) { |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 124 | Statement statement = ParseStatement(CHECK_OK); |
| 125 | if (allow_directive_prologue) { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 126 | if (statement.IsUseStrictLiteral()) { |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 127 | set_strict_mode(); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 128 | } else if (!statement.IsStringLiteral()) { |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 129 | allow_directive_prologue = false; |
| 130 | } |
| 131 | } |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 132 | } |
| 133 | return kUnknownSourceElements; |
| 134 | } |
| 135 | |
| 136 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 137 | #undef CHECK_OK |
| 138 | #define CHECK_OK ok); \ |
| 139 | if (!*ok) return Statement::Default(); \ |
| 140 | ((void)0 |
| 141 | #define DUMMY ) // to make indentation work |
| 142 | #undef DUMMY |
| 143 | |
| 144 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 145 | PreParser::Statement PreParser::ParseStatement(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 146 | // Statement :: |
| 147 | // Block |
| 148 | // VariableStatement |
| 149 | // EmptyStatement |
| 150 | // ExpressionStatement |
| 151 | // IfStatement |
| 152 | // IterationStatement |
| 153 | // ContinueStatement |
| 154 | // BreakStatement |
| 155 | // ReturnStatement |
| 156 | // WithStatement |
| 157 | // LabelledStatement |
| 158 | // SwitchStatement |
| 159 | // ThrowStatement |
| 160 | // TryStatement |
| 161 | // DebuggerStatement |
| 162 | |
| 163 | // Note: Since labels can only be used by 'break' and 'continue' |
| 164 | // statements, which themselves are only valid within blocks, |
| 165 | // iterations or 'switch' statements (i.e., BreakableStatements), |
| 166 | // labels can be simply ignored in all other cases; except for |
| 167 | // trivial labeled break statements 'label: break label' which is |
| 168 | // parsed into an empty statement. |
| 169 | |
| 170 | // Keep the source position of the statement |
| 171 | switch (peek()) { |
| 172 | case i::Token::LBRACE: |
| 173 | return ParseBlock(ok); |
| 174 | |
| 175 | case i::Token::CONST: |
| 176 | case i::Token::VAR: |
| 177 | return ParseVariableStatement(ok); |
| 178 | |
| 179 | case i::Token::SEMICOLON: |
| 180 | Next(); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 181 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 182 | |
| 183 | case i::Token::IF: |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 184 | return ParseIfStatement(ok); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 185 | |
| 186 | case i::Token::DO: |
| 187 | return ParseDoWhileStatement(ok); |
| 188 | |
| 189 | case i::Token::WHILE: |
| 190 | return ParseWhileStatement(ok); |
| 191 | |
| 192 | case i::Token::FOR: |
| 193 | return ParseForStatement(ok); |
| 194 | |
| 195 | case i::Token::CONTINUE: |
| 196 | return ParseContinueStatement(ok); |
| 197 | |
| 198 | case i::Token::BREAK: |
| 199 | return ParseBreakStatement(ok); |
| 200 | |
| 201 | case i::Token::RETURN: |
| 202 | return ParseReturnStatement(ok); |
| 203 | |
| 204 | case i::Token::WITH: |
| 205 | return ParseWithStatement(ok); |
| 206 | |
| 207 | case i::Token::SWITCH: |
| 208 | return ParseSwitchStatement(ok); |
| 209 | |
| 210 | case i::Token::THROW: |
| 211 | return ParseThrowStatement(ok); |
| 212 | |
| 213 | case i::Token::TRY: |
| 214 | return ParseTryStatement(ok); |
| 215 | |
| 216 | case i::Token::FUNCTION: |
| 217 | return ParseFunctionDeclaration(ok); |
| 218 | |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 219 | case i::Token::DEBUGGER: |
| 220 | return ParseDebuggerStatement(ok); |
| 221 | |
| 222 | default: |
| 223 | return ParseExpressionOrLabelledStatement(ok); |
| 224 | } |
| 225 | } |
| 226 | |
| 227 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 228 | PreParser::Statement PreParser::ParseFunctionDeclaration(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 229 | // FunctionDeclaration :: |
| 230 | // 'function' Identifier '(' FormalParameterListopt ')' '{' FunctionBody '}' |
| 231 | Expect(i::Token::FUNCTION, CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 232 | |
| 233 | Identifier identifier = ParseIdentifier(CHECK_OK); |
| 234 | i::Scanner::Location location = scanner_->location(); |
| 235 | |
| 236 | Expression function_value = ParseFunctionLiteral(CHECK_OK); |
| 237 | |
| 238 | if (function_value.IsStrictFunction() && |
| 239 | !identifier.IsValidStrictVariable()) { |
| 240 | // Strict mode violation, using either reserved word or eval/arguments |
| 241 | // as name of strict function. |
| 242 | const char* type = "strict_function_name"; |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 243 | if (identifier.IsFutureStrictReserved()) { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 244 | type = "strict_reserved_word"; |
| 245 | } |
| 246 | ReportMessageAt(location.beg_pos, location.end_pos, type, NULL); |
| 247 | *ok = false; |
| 248 | } |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 249 | return Statement::FunctionDeclaration(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 250 | } |
| 251 | |
| 252 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 253 | PreParser::Statement PreParser::ParseBlock(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 254 | // Block :: |
| 255 | // '{' Statement* '}' |
| 256 | |
| 257 | // Note that a Block does not introduce a new execution scope! |
| 258 | // (ECMA-262, 3rd, 12.2) |
| 259 | // |
| 260 | Expect(i::Token::LBRACE, CHECK_OK); |
| 261 | while (peek() != i::Token::RBRACE) { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 262 | i::Scanner::Location start_location = scanner_->peek_location(); |
| 263 | Statement statement = ParseStatement(CHECK_OK); |
| 264 | i::Scanner::Location end_location = scanner_->location(); |
| 265 | if (strict_mode() && statement.IsFunctionDeclaration()) { |
| 266 | ReportMessageAt(start_location.beg_pos, end_location.end_pos, |
| 267 | "strict_function", NULL); |
| 268 | *ok = false; |
| 269 | return Statement::Default(); |
| 270 | } |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 271 | } |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 272 | Expect(i::Token::RBRACE, ok); |
| 273 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 274 | } |
| 275 | |
| 276 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 277 | PreParser::Statement PreParser::ParseVariableStatement(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 278 | // VariableStatement :: |
| 279 | // VariableDeclarations ';' |
| 280 | |
| 281 | Statement result = ParseVariableDeclarations(true, NULL, CHECK_OK); |
| 282 | ExpectSemicolon(CHECK_OK); |
| 283 | return result; |
| 284 | } |
| 285 | |
| 286 | |
| 287 | // If the variable declaration declares exactly one non-const |
| 288 | // variable, then *var is set to that variable. In all other cases, |
| 289 | // *var is untouched; in particular, it is the caller's responsibility |
| 290 | // to initialize it properly. This mechanism is also used for the parsing |
| 291 | // of 'for-in' loops. |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 292 | PreParser::Statement PreParser::ParseVariableDeclarations(bool accept_IN, |
| 293 | int* num_decl, |
| 294 | bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 295 | // VariableDeclarations :: |
| 296 | // ('var' | 'const') (Identifier ('=' AssignmentExpression)?)+[','] |
| 297 | |
| 298 | if (peek() == i::Token::VAR) { |
| 299 | Consume(i::Token::VAR); |
| 300 | } else if (peek() == i::Token::CONST) { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 301 | if (strict_mode()) { |
| 302 | i::Scanner::Location location = scanner_->peek_location(); |
| 303 | ReportMessageAt(location.beg_pos, location.end_pos, |
| 304 | "strict_const", NULL); |
| 305 | *ok = false; |
| 306 | return Statement::Default(); |
| 307 | } |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 308 | Consume(i::Token::CONST); |
| 309 | } else { |
| 310 | *ok = false; |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 311 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 312 | } |
| 313 | |
| 314 | // The scope of a variable/const declared anywhere inside a function |
| 315 | // is the entire function (ECMA-262, 3rd, 10.1.3, and 12.2). . |
| 316 | int nvars = 0; // the number of variables declared |
| 317 | do { |
| 318 | // Parse variable name. |
| 319 | if (nvars > 0) Consume(i::Token::COMMA); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 320 | Identifier identifier = ParseIdentifier(CHECK_OK); |
| 321 | if (strict_mode() && !identifier.IsValidStrictVariable()) { |
| 322 | StrictModeIdentifierViolation(scanner_->location(), |
| 323 | "strict_var_name", |
| 324 | identifier, |
| 325 | ok); |
| 326 | return Statement::Default(); |
| 327 | } |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 328 | nvars++; |
| 329 | if (peek() == i::Token::ASSIGN) { |
| 330 | Expect(i::Token::ASSIGN, CHECK_OK); |
| 331 | ParseAssignmentExpression(accept_IN, CHECK_OK); |
| 332 | } |
| 333 | } while (peek() == i::Token::COMMA); |
| 334 | |
| 335 | if (num_decl != NULL) *num_decl = nvars; |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 336 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 337 | } |
| 338 | |
| 339 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 340 | PreParser::Statement PreParser::ParseExpressionOrLabelledStatement(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 341 | // ExpressionStatement | LabelledStatement :: |
| 342 | // Expression ';' |
| 343 | // Identifier ':' Statement |
| 344 | |
| 345 | Expression expr = ParseExpression(true, CHECK_OK); |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 346 | if (expr.IsRawIdentifier()) { |
| 347 | if (peek() == i::Token::COLON && |
| 348 | (!strict_mode() || !expr.AsIdentifier().IsFutureReserved())) { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 349 | Consume(i::Token::COLON); |
| 350 | i::Scanner::Location start_location = scanner_->peek_location(); |
| 351 | Statement statement = ParseStatement(CHECK_OK); |
| 352 | if (strict_mode() && statement.IsFunctionDeclaration()) { |
| 353 | i::Scanner::Location end_location = scanner_->location(); |
| 354 | ReportMessageAt(start_location.beg_pos, end_location.end_pos, |
| 355 | "strict_function", NULL); |
| 356 | *ok = false; |
| 357 | } |
| 358 | return Statement::Default(); |
| 359 | } |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 360 | // Preparsing is disabled for extensions (because the extension details |
| 361 | // aren't passed to lazily compiled functions), so we don't |
| 362 | // accept "native function" in the preparser. |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 363 | } |
| 364 | // Parsed expression statement. |
| 365 | ExpectSemicolon(CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 366 | return Statement::ExpressionStatement(expr); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 367 | } |
| 368 | |
| 369 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 370 | PreParser::Statement PreParser::ParseIfStatement(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 371 | // IfStatement :: |
| 372 | // 'if' '(' Expression ')' Statement ('else' Statement)? |
| 373 | |
| 374 | Expect(i::Token::IF, CHECK_OK); |
| 375 | Expect(i::Token::LPAREN, CHECK_OK); |
| 376 | ParseExpression(true, CHECK_OK); |
| 377 | Expect(i::Token::RPAREN, CHECK_OK); |
| 378 | ParseStatement(CHECK_OK); |
| 379 | if (peek() == i::Token::ELSE) { |
| 380 | Next(); |
| 381 | ParseStatement(CHECK_OK); |
| 382 | } |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 383 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 384 | } |
| 385 | |
| 386 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 387 | PreParser::Statement PreParser::ParseContinueStatement(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 388 | // ContinueStatement :: |
| 389 | // 'continue' [no line terminator] Identifier? ';' |
| 390 | |
| 391 | Expect(i::Token::CONTINUE, CHECK_OK); |
| 392 | i::Token::Value tok = peek(); |
whesse@chromium.org | df8c03c | 2011-06-21 14:36:03 +0000 | [diff] [blame] | 393 | if (!scanner_->HasAnyLineTerminatorBeforeNext() && |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 394 | tok != i::Token::SEMICOLON && |
| 395 | tok != i::Token::RBRACE && |
| 396 | tok != i::Token::EOS) { |
| 397 | ParseIdentifier(CHECK_OK); |
| 398 | } |
| 399 | ExpectSemicolon(CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 400 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 401 | } |
| 402 | |
| 403 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 404 | PreParser::Statement PreParser::ParseBreakStatement(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 405 | // BreakStatement :: |
| 406 | // 'break' [no line terminator] Identifier? ';' |
| 407 | |
| 408 | Expect(i::Token::BREAK, CHECK_OK); |
| 409 | i::Token::Value tok = peek(); |
whesse@chromium.org | df8c03c | 2011-06-21 14:36:03 +0000 | [diff] [blame] | 410 | if (!scanner_->HasAnyLineTerminatorBeforeNext() && |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 411 | tok != i::Token::SEMICOLON && |
| 412 | tok != i::Token::RBRACE && |
| 413 | tok != i::Token::EOS) { |
| 414 | ParseIdentifier(CHECK_OK); |
| 415 | } |
| 416 | ExpectSemicolon(CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 417 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 418 | } |
| 419 | |
| 420 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 421 | PreParser::Statement PreParser::ParseReturnStatement(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 422 | // ReturnStatement :: |
| 423 | // 'return' [no line terminator] Expression? ';' |
| 424 | |
| 425 | // Consume the return token. It is necessary to do the before |
| 426 | // reporting any errors on it, because of the way errors are |
| 427 | // reported (underlining). |
| 428 | Expect(i::Token::RETURN, CHECK_OK); |
| 429 | |
| 430 | // An ECMAScript program is considered syntactically incorrect if it |
| 431 | // contains a return statement that is not within the body of a |
| 432 | // function. See ECMA-262, section 12.9, page 67. |
| 433 | // This is not handled during preparsing. |
| 434 | |
| 435 | i::Token::Value tok = peek(); |
whesse@chromium.org | df8c03c | 2011-06-21 14:36:03 +0000 | [diff] [blame] | 436 | if (!scanner_->HasAnyLineTerminatorBeforeNext() && |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 437 | tok != i::Token::SEMICOLON && |
| 438 | tok != i::Token::RBRACE && |
| 439 | tok != i::Token::EOS) { |
| 440 | ParseExpression(true, CHECK_OK); |
| 441 | } |
| 442 | ExpectSemicolon(CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 443 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 444 | } |
| 445 | |
| 446 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 447 | PreParser::Statement PreParser::ParseWithStatement(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 448 | // WithStatement :: |
| 449 | // 'with' '(' Expression ')' Statement |
| 450 | Expect(i::Token::WITH, CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 451 | if (strict_mode()) { |
| 452 | i::Scanner::Location location = scanner_->location(); |
| 453 | ReportMessageAt(location.beg_pos, location.end_pos, |
| 454 | "strict_mode_with", NULL); |
| 455 | *ok = false; |
| 456 | return Statement::Default(); |
| 457 | } |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 458 | Expect(i::Token::LPAREN, CHECK_OK); |
| 459 | ParseExpression(true, CHECK_OK); |
| 460 | Expect(i::Token::RPAREN, CHECK_OK); |
| 461 | |
| 462 | scope_->EnterWith(); |
| 463 | ParseStatement(CHECK_OK); |
| 464 | scope_->LeaveWith(); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 465 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 466 | } |
| 467 | |
| 468 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 469 | PreParser::Statement PreParser::ParseSwitchStatement(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 470 | // SwitchStatement :: |
| 471 | // 'switch' '(' Expression ')' '{' CaseClause* '}' |
| 472 | |
| 473 | Expect(i::Token::SWITCH, CHECK_OK); |
| 474 | Expect(i::Token::LPAREN, CHECK_OK); |
| 475 | ParseExpression(true, CHECK_OK); |
| 476 | Expect(i::Token::RPAREN, CHECK_OK); |
| 477 | |
| 478 | Expect(i::Token::LBRACE, CHECK_OK); |
| 479 | i::Token::Value token = peek(); |
| 480 | while (token != i::Token::RBRACE) { |
| 481 | if (token == i::Token::CASE) { |
| 482 | Expect(i::Token::CASE, CHECK_OK); |
| 483 | ParseExpression(true, CHECK_OK); |
| 484 | Expect(i::Token::COLON, CHECK_OK); |
| 485 | } else if (token == i::Token::DEFAULT) { |
| 486 | Expect(i::Token::DEFAULT, CHECK_OK); |
| 487 | Expect(i::Token::COLON, CHECK_OK); |
| 488 | } else { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 489 | i::Scanner::Location start_location = scanner_->peek_location(); |
| 490 | Statement statement = ParseStatement(CHECK_OK); |
| 491 | if (strict_mode() && statement.IsFunctionDeclaration()) { |
| 492 | i::Scanner::Location end_location = scanner_->location(); |
| 493 | ReportMessageAt(start_location.beg_pos, end_location.end_pos, |
| 494 | "strict_function", NULL); |
| 495 | *ok = false; |
| 496 | return Statement::Default(); |
| 497 | } |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 498 | } |
| 499 | token = peek(); |
| 500 | } |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 501 | Expect(i::Token::RBRACE, ok); |
| 502 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 503 | } |
| 504 | |
| 505 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 506 | PreParser::Statement PreParser::ParseDoWhileStatement(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 507 | // DoStatement :: |
| 508 | // 'do' Statement 'while' '(' Expression ')' ';' |
| 509 | |
| 510 | Expect(i::Token::DO, CHECK_OK); |
| 511 | ParseStatement(CHECK_OK); |
| 512 | Expect(i::Token::WHILE, CHECK_OK); |
| 513 | Expect(i::Token::LPAREN, CHECK_OK); |
| 514 | ParseExpression(true, CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 515 | Expect(i::Token::RPAREN, ok); |
| 516 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 517 | } |
| 518 | |
| 519 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 520 | PreParser::Statement PreParser::ParseWhileStatement(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 521 | // WhileStatement :: |
| 522 | // 'while' '(' Expression ')' Statement |
| 523 | |
| 524 | Expect(i::Token::WHILE, CHECK_OK); |
| 525 | Expect(i::Token::LPAREN, CHECK_OK); |
| 526 | ParseExpression(true, CHECK_OK); |
| 527 | Expect(i::Token::RPAREN, CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 528 | ParseStatement(ok); |
| 529 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 530 | } |
| 531 | |
| 532 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 533 | PreParser::Statement PreParser::ParseForStatement(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 534 | // ForStatement :: |
| 535 | // 'for' '(' Expression? ';' Expression? ';' Expression? ')' Statement |
| 536 | |
| 537 | Expect(i::Token::FOR, CHECK_OK); |
| 538 | Expect(i::Token::LPAREN, CHECK_OK); |
| 539 | if (peek() != i::Token::SEMICOLON) { |
| 540 | if (peek() == i::Token::VAR || peek() == i::Token::CONST) { |
| 541 | int decl_count; |
| 542 | ParseVariableDeclarations(false, &decl_count, CHECK_OK); |
| 543 | if (peek() == i::Token::IN && decl_count == 1) { |
| 544 | Expect(i::Token::IN, CHECK_OK); |
| 545 | ParseExpression(true, CHECK_OK); |
| 546 | Expect(i::Token::RPAREN, CHECK_OK); |
| 547 | |
| 548 | ParseStatement(CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 549 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 550 | } |
| 551 | } else { |
| 552 | ParseExpression(false, CHECK_OK); |
| 553 | if (peek() == i::Token::IN) { |
| 554 | Expect(i::Token::IN, CHECK_OK); |
| 555 | ParseExpression(true, CHECK_OK); |
| 556 | Expect(i::Token::RPAREN, CHECK_OK); |
| 557 | |
| 558 | ParseStatement(CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 559 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 560 | } |
| 561 | } |
| 562 | } |
| 563 | |
| 564 | // Parsed initializer at this point. |
| 565 | Expect(i::Token::SEMICOLON, CHECK_OK); |
| 566 | |
| 567 | if (peek() != i::Token::SEMICOLON) { |
| 568 | ParseExpression(true, CHECK_OK); |
| 569 | } |
| 570 | Expect(i::Token::SEMICOLON, CHECK_OK); |
| 571 | |
| 572 | if (peek() != i::Token::RPAREN) { |
| 573 | ParseExpression(true, CHECK_OK); |
| 574 | } |
| 575 | Expect(i::Token::RPAREN, CHECK_OK); |
| 576 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 577 | ParseStatement(ok); |
| 578 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 579 | } |
| 580 | |
| 581 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 582 | PreParser::Statement PreParser::ParseThrowStatement(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 583 | // ThrowStatement :: |
| 584 | // 'throw' [no line terminator] Expression ';' |
| 585 | |
| 586 | Expect(i::Token::THROW, CHECK_OK); |
whesse@chromium.org | df8c03c | 2011-06-21 14:36:03 +0000 | [diff] [blame] | 587 | if (scanner_->HasAnyLineTerminatorBeforeNext()) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 588 | i::JavaScriptScanner::Location pos = scanner_->location(); |
| 589 | ReportMessageAt(pos.beg_pos, pos.end_pos, |
| 590 | "newline_after_throw", NULL); |
| 591 | *ok = false; |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 592 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 593 | } |
| 594 | ParseExpression(true, CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 595 | ExpectSemicolon(ok); |
| 596 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 597 | } |
| 598 | |
| 599 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 600 | PreParser::Statement PreParser::ParseTryStatement(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 601 | // TryStatement :: |
| 602 | // 'try' Block Catch |
| 603 | // 'try' Block Finally |
| 604 | // 'try' Block Catch Finally |
| 605 | // |
| 606 | // Catch :: |
| 607 | // 'catch' '(' Identifier ')' Block |
| 608 | // |
| 609 | // Finally :: |
| 610 | // 'finally' Block |
| 611 | |
| 612 | // In preparsing, allow any number of catch/finally blocks, including zero |
| 613 | // of both. |
| 614 | |
| 615 | Expect(i::Token::TRY, CHECK_OK); |
| 616 | |
| 617 | ParseBlock(CHECK_OK); |
| 618 | |
| 619 | bool catch_or_finally_seen = false; |
| 620 | if (peek() == i::Token::CATCH) { |
| 621 | Consume(i::Token::CATCH); |
| 622 | Expect(i::Token::LPAREN, CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 623 | Identifier id = ParseIdentifier(CHECK_OK); |
| 624 | if (strict_mode() && !id.IsValidStrictVariable()) { |
| 625 | StrictModeIdentifierViolation(scanner_->location(), |
| 626 | "strict_catch_variable", |
| 627 | id, |
| 628 | ok); |
| 629 | return Statement::Default(); |
| 630 | } |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 631 | Expect(i::Token::RPAREN, CHECK_OK); |
| 632 | scope_->EnterWith(); |
| 633 | ParseBlock(ok); |
| 634 | scope_->LeaveWith(); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 635 | if (!*ok) Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 636 | catch_or_finally_seen = true; |
| 637 | } |
| 638 | if (peek() == i::Token::FINALLY) { |
| 639 | Consume(i::Token::FINALLY); |
| 640 | ParseBlock(CHECK_OK); |
| 641 | catch_or_finally_seen = true; |
| 642 | } |
| 643 | if (!catch_or_finally_seen) { |
| 644 | *ok = false; |
| 645 | } |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 646 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 647 | } |
| 648 | |
| 649 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 650 | PreParser::Statement PreParser::ParseDebuggerStatement(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 651 | // In ECMA-262 'debugger' is defined as a reserved keyword. In some browser |
| 652 | // contexts this is used as a statement which invokes the debugger as if a |
| 653 | // break point is present. |
| 654 | // DebuggerStatement :: |
| 655 | // 'debugger' ';' |
| 656 | |
| 657 | Expect(i::Token::DEBUGGER, CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 658 | ExpectSemicolon(ok); |
| 659 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 660 | } |
| 661 | |
| 662 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 663 | #undef CHECK_OK |
| 664 | #define CHECK_OK ok); \ |
| 665 | if (!*ok) return Expression::Default(); \ |
| 666 | ((void)0 |
| 667 | #define DUMMY ) // to make indentation work |
| 668 | #undef DUMMY |
| 669 | |
| 670 | |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 671 | // Precedence = 1 |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 672 | PreParser::Expression PreParser::ParseExpression(bool accept_IN, bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 673 | // Expression :: |
| 674 | // AssignmentExpression |
| 675 | // Expression ',' AssignmentExpression |
| 676 | |
| 677 | Expression result = ParseAssignmentExpression(accept_IN, CHECK_OK); |
| 678 | while (peek() == i::Token::COMMA) { |
| 679 | Expect(i::Token::COMMA, CHECK_OK); |
| 680 | ParseAssignmentExpression(accept_IN, CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 681 | result = Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 682 | } |
| 683 | return result; |
| 684 | } |
| 685 | |
| 686 | |
| 687 | // Precedence = 2 |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 688 | PreParser::Expression PreParser::ParseAssignmentExpression(bool accept_IN, |
| 689 | bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 690 | // AssignmentExpression :: |
| 691 | // ConditionalExpression |
| 692 | // LeftHandSideExpression AssignmentOperator AssignmentExpression |
| 693 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 694 | i::Scanner::Location before = scanner_->peek_location(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 695 | Expression expression = ParseConditionalExpression(accept_IN, CHECK_OK); |
| 696 | |
| 697 | if (!i::Token::IsAssignmentOp(peek())) { |
| 698 | // Parsed conditional expression only (no assignment). |
| 699 | return expression; |
| 700 | } |
| 701 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 702 | if (strict_mode() && expression.IsIdentifier() && |
| 703 | expression.AsIdentifier().IsEvalOrArguments()) { |
| 704 | i::Scanner::Location after = scanner_->location(); |
| 705 | ReportMessageAt(before.beg_pos, after.end_pos, |
| 706 | "strict_lhs_assignment", NULL); |
| 707 | *ok = false; |
| 708 | return Expression::Default(); |
| 709 | } |
| 710 | |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 711 | i::Token::Value op = Next(); // Get assignment operator. |
| 712 | ParseAssignmentExpression(accept_IN, CHECK_OK); |
| 713 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 714 | if ((op == i::Token::ASSIGN) && expression.IsThisProperty()) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 715 | scope_->AddProperty(); |
| 716 | } |
| 717 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 718 | return Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 719 | } |
| 720 | |
| 721 | |
| 722 | // Precedence = 3 |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 723 | PreParser::Expression PreParser::ParseConditionalExpression(bool accept_IN, |
| 724 | bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 725 | // ConditionalExpression :: |
| 726 | // LogicalOrExpression |
| 727 | // LogicalOrExpression '?' AssignmentExpression ':' AssignmentExpression |
| 728 | |
| 729 | // We start using the binary expression parser for prec >= 4 only! |
| 730 | Expression expression = ParseBinaryExpression(4, accept_IN, CHECK_OK); |
| 731 | if (peek() != i::Token::CONDITIONAL) return expression; |
| 732 | Consume(i::Token::CONDITIONAL); |
| 733 | // In parsing the first assignment expression in conditional |
| 734 | // expressions we always accept the 'in' keyword; see ECMA-262, |
| 735 | // section 11.12, page 58. |
| 736 | ParseAssignmentExpression(true, CHECK_OK); |
| 737 | Expect(i::Token::COLON, CHECK_OK); |
| 738 | ParseAssignmentExpression(accept_IN, CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 739 | return Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 740 | } |
| 741 | |
| 742 | |
| 743 | int PreParser::Precedence(i::Token::Value tok, bool accept_IN) { |
| 744 | if (tok == i::Token::IN && !accept_IN) |
| 745 | return 0; // 0 precedence will terminate binary expression parsing |
| 746 | |
| 747 | return i::Token::Precedence(tok); |
| 748 | } |
| 749 | |
| 750 | |
| 751 | // Precedence >= 4 |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 752 | PreParser::Expression PreParser::ParseBinaryExpression(int prec, |
| 753 | bool accept_IN, |
| 754 | bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 755 | Expression result = ParseUnaryExpression(CHECK_OK); |
| 756 | for (int prec1 = Precedence(peek(), accept_IN); prec1 >= prec; prec1--) { |
| 757 | // prec1 >= 4 |
| 758 | while (Precedence(peek(), accept_IN) == prec1) { |
| 759 | Next(); |
| 760 | ParseBinaryExpression(prec1 + 1, accept_IN, CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 761 | result = Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 762 | } |
| 763 | } |
| 764 | return result; |
| 765 | } |
| 766 | |
| 767 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 768 | PreParser::Expression PreParser::ParseUnaryExpression(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 769 | // UnaryExpression :: |
| 770 | // PostfixExpression |
| 771 | // 'delete' UnaryExpression |
| 772 | // 'void' UnaryExpression |
| 773 | // 'typeof' UnaryExpression |
| 774 | // '++' UnaryExpression |
| 775 | // '--' UnaryExpression |
| 776 | // '+' UnaryExpression |
| 777 | // '-' UnaryExpression |
| 778 | // '~' UnaryExpression |
| 779 | // '!' UnaryExpression |
| 780 | |
| 781 | i::Token::Value op = peek(); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 782 | if (i::Token::IsUnaryOp(op)) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 783 | op = Next(); |
| 784 | ParseUnaryExpression(ok); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 785 | return Expression::Default(); |
| 786 | } else if (i::Token::IsCountOp(op)) { |
| 787 | op = Next(); |
| 788 | i::Scanner::Location before = scanner_->peek_location(); |
| 789 | Expression expression = ParseUnaryExpression(CHECK_OK); |
| 790 | if (strict_mode() && expression.IsIdentifier() && |
| 791 | expression.AsIdentifier().IsEvalOrArguments()) { |
| 792 | i::Scanner::Location after = scanner_->location(); |
| 793 | ReportMessageAt(before.beg_pos, after.end_pos, |
| 794 | "strict_lhs_prefix", NULL); |
| 795 | *ok = false; |
| 796 | } |
| 797 | return Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 798 | } else { |
| 799 | return ParsePostfixExpression(ok); |
| 800 | } |
| 801 | } |
| 802 | |
| 803 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 804 | PreParser::Expression PreParser::ParsePostfixExpression(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 805 | // PostfixExpression :: |
| 806 | // LeftHandSideExpression ('++' | '--')? |
| 807 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 808 | i::Scanner::Location before = scanner_->peek_location(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 809 | Expression expression = ParseLeftHandSideExpression(CHECK_OK); |
whesse@chromium.org | df8c03c | 2011-06-21 14:36:03 +0000 | [diff] [blame] | 810 | if (!scanner_->HasAnyLineTerminatorBeforeNext() && |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 811 | i::Token::IsCountOp(peek())) { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 812 | if (strict_mode() && expression.IsIdentifier() && |
| 813 | expression.AsIdentifier().IsEvalOrArguments()) { |
| 814 | i::Scanner::Location after = scanner_->location(); |
| 815 | ReportMessageAt(before.beg_pos, after.end_pos, |
| 816 | "strict_lhs_postfix", NULL); |
| 817 | *ok = false; |
| 818 | return Expression::Default(); |
| 819 | } |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 820 | Next(); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 821 | return Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 822 | } |
| 823 | return expression; |
| 824 | } |
| 825 | |
| 826 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 827 | PreParser::Expression PreParser::ParseLeftHandSideExpression(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 828 | // LeftHandSideExpression :: |
| 829 | // (NewExpression | MemberExpression) ... |
| 830 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 831 | Expression result = Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 832 | if (peek() == i::Token::NEW) { |
| 833 | result = ParseNewExpression(CHECK_OK); |
| 834 | } else { |
| 835 | result = ParseMemberExpression(CHECK_OK); |
| 836 | } |
| 837 | |
| 838 | while (true) { |
| 839 | switch (peek()) { |
| 840 | case i::Token::LBRACK: { |
| 841 | Consume(i::Token::LBRACK); |
| 842 | ParseExpression(true, CHECK_OK); |
| 843 | Expect(i::Token::RBRACK, CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 844 | if (result.IsThis()) { |
| 845 | result = Expression::ThisProperty(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 846 | } else { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 847 | result = Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 848 | } |
| 849 | break; |
| 850 | } |
| 851 | |
| 852 | case i::Token::LPAREN: { |
| 853 | ParseArguments(CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 854 | result = Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 855 | break; |
| 856 | } |
| 857 | |
| 858 | case i::Token::PERIOD: { |
| 859 | Consume(i::Token::PERIOD); |
| 860 | ParseIdentifierName(CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 861 | if (result.IsThis()) { |
| 862 | result = Expression::ThisProperty(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 863 | } else { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 864 | result = Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 865 | } |
| 866 | break; |
| 867 | } |
| 868 | |
| 869 | default: |
| 870 | return result; |
| 871 | } |
| 872 | } |
| 873 | } |
| 874 | |
| 875 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 876 | PreParser::Expression PreParser::ParseNewExpression(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 877 | // NewExpression :: |
| 878 | // ('new')+ MemberExpression |
| 879 | |
| 880 | // The grammar for new expressions is pretty warped. The keyword |
| 881 | // 'new' can either be a part of the new expression (where it isn't |
| 882 | // followed by an argument list) or a part of the member expression, |
| 883 | // where it must be followed by an argument list. To accommodate |
| 884 | // this, we parse the 'new' keywords greedily and keep track of how |
| 885 | // many we have parsed. This information is then passed on to the |
| 886 | // member expression parser, which is only allowed to match argument |
| 887 | // lists as long as it has 'new' prefixes left |
| 888 | unsigned new_count = 0; |
| 889 | do { |
| 890 | Consume(i::Token::NEW); |
| 891 | new_count++; |
| 892 | } while (peek() == i::Token::NEW); |
| 893 | |
| 894 | return ParseMemberWithNewPrefixesExpression(new_count, ok); |
| 895 | } |
| 896 | |
| 897 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 898 | PreParser::Expression PreParser::ParseMemberExpression(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 899 | return ParseMemberWithNewPrefixesExpression(0, ok); |
| 900 | } |
| 901 | |
| 902 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 903 | PreParser::Expression PreParser::ParseMemberWithNewPrefixesExpression( |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 904 | unsigned new_count, bool* ok) { |
| 905 | // MemberExpression :: |
| 906 | // (PrimaryExpression | FunctionLiteral) |
| 907 | // ('[' Expression ']' | '.' Identifier | Arguments)* |
| 908 | |
| 909 | // Parse the initial primary or function expression. |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 910 | Expression result = Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 911 | if (peek() == i::Token::FUNCTION) { |
| 912 | Consume(i::Token::FUNCTION); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 913 | Identifier identifier = Identifier::Default(); |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 914 | if (peek_any_identifier()) { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 915 | identifier = ParseIdentifier(CHECK_OK); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 916 | } |
| 917 | result = ParseFunctionLiteral(CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 918 | if (result.IsStrictFunction() && !identifier.IsValidStrictVariable()) { |
| 919 | StrictModeIdentifierViolation(scanner_->location(), |
| 920 | "strict_function_name", |
| 921 | identifier, |
| 922 | ok); |
| 923 | return Expression::Default(); |
| 924 | } |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 925 | } else { |
| 926 | result = ParsePrimaryExpression(CHECK_OK); |
| 927 | } |
| 928 | |
| 929 | while (true) { |
| 930 | switch (peek()) { |
| 931 | case i::Token::LBRACK: { |
| 932 | Consume(i::Token::LBRACK); |
| 933 | ParseExpression(true, CHECK_OK); |
| 934 | Expect(i::Token::RBRACK, CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 935 | if (result.IsThis()) { |
| 936 | result = Expression::ThisProperty(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 937 | } else { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 938 | result = Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 939 | } |
| 940 | break; |
| 941 | } |
| 942 | case i::Token::PERIOD: { |
| 943 | Consume(i::Token::PERIOD); |
| 944 | ParseIdentifierName(CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 945 | if (result.IsThis()) { |
| 946 | result = Expression::ThisProperty(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 947 | } else { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 948 | result = Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 949 | } |
| 950 | break; |
| 951 | } |
| 952 | case i::Token::LPAREN: { |
| 953 | if (new_count == 0) return result; |
| 954 | // Consume one of the new prefixes (already parsed). |
| 955 | ParseArguments(CHECK_OK); |
| 956 | new_count--; |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 957 | result = Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 958 | break; |
| 959 | } |
| 960 | default: |
| 961 | return result; |
| 962 | } |
| 963 | } |
| 964 | } |
| 965 | |
| 966 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 967 | PreParser::Expression PreParser::ParsePrimaryExpression(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 968 | // PrimaryExpression :: |
| 969 | // 'this' |
| 970 | // 'null' |
| 971 | // 'true' |
| 972 | // 'false' |
| 973 | // Identifier |
| 974 | // Number |
| 975 | // String |
| 976 | // ArrayLiteral |
| 977 | // ObjectLiteral |
| 978 | // RegExpLiteral |
| 979 | // '(' Expression ')' |
| 980 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 981 | Expression result = Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 982 | switch (peek()) { |
| 983 | case i::Token::THIS: { |
| 984 | Next(); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 985 | result = Expression::This(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 986 | break; |
| 987 | } |
| 988 | |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 989 | case i::Token::FUTURE_RESERVED_WORD: { |
| 990 | Next(); |
| 991 | i::Scanner::Location location = scanner_->location(); |
| 992 | ReportMessageAt(location.beg_pos, location.end_pos, |
| 993 | "reserved_word", NULL); |
| 994 | *ok = false; |
| 995 | return Expression::Default(); |
| 996 | } |
| 997 | |
| 998 | case i::Token::FUTURE_STRICT_RESERVED_WORD: |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 999 | if (strict_mode()) { |
| 1000 | Next(); |
| 1001 | i::Scanner::Location location = scanner_->location(); |
| 1002 | ReportMessageAt(location.beg_pos, location.end_pos, |
| 1003 | "strict_reserved_word", NULL); |
| 1004 | *ok = false; |
| 1005 | return Expression::Default(); |
| 1006 | } |
| 1007 | // FALLTHROUGH |
| 1008 | case i::Token::IDENTIFIER: { |
| 1009 | Identifier id = ParseIdentifier(CHECK_OK); |
| 1010 | result = Expression::FromIdentifier(id); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1011 | break; |
| 1012 | } |
| 1013 | |
| 1014 | case i::Token::NULL_LITERAL: |
| 1015 | case i::Token::TRUE_LITERAL: |
| 1016 | case i::Token::FALSE_LITERAL: |
| 1017 | case i::Token::NUMBER: { |
| 1018 | Next(); |
| 1019 | break; |
| 1020 | } |
| 1021 | case i::Token::STRING: { |
| 1022 | Next(); |
| 1023 | result = GetStringSymbol(); |
| 1024 | break; |
| 1025 | } |
| 1026 | |
| 1027 | case i::Token::ASSIGN_DIV: |
| 1028 | result = ParseRegExpLiteral(true, CHECK_OK); |
| 1029 | break; |
| 1030 | |
| 1031 | case i::Token::DIV: |
| 1032 | result = ParseRegExpLiteral(false, CHECK_OK); |
| 1033 | break; |
| 1034 | |
| 1035 | case i::Token::LBRACK: |
| 1036 | result = ParseArrayLiteral(CHECK_OK); |
| 1037 | break; |
| 1038 | |
| 1039 | case i::Token::LBRACE: |
| 1040 | result = ParseObjectLiteral(CHECK_OK); |
| 1041 | break; |
| 1042 | |
| 1043 | case i::Token::LPAREN: |
| 1044 | Consume(i::Token::LPAREN); |
sgjesse@chromium.org | c6c5718 | 2011-01-17 12:24:25 +0000 | [diff] [blame] | 1045 | parenthesized_function_ = (peek() == i::Token::FUNCTION); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1046 | result = ParseExpression(true, CHECK_OK); |
| 1047 | Expect(i::Token::RPAREN, CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1048 | result = result.Parenthesize(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1049 | break; |
| 1050 | |
| 1051 | case i::Token::MOD: |
| 1052 | result = ParseV8Intrinsic(CHECK_OK); |
| 1053 | break; |
| 1054 | |
| 1055 | default: { |
| 1056 | Next(); |
| 1057 | *ok = false; |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1058 | return Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1059 | } |
| 1060 | } |
| 1061 | |
| 1062 | return result; |
| 1063 | } |
| 1064 | |
| 1065 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1066 | PreParser::Expression PreParser::ParseArrayLiteral(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1067 | // ArrayLiteral :: |
| 1068 | // '[' Expression? (',' Expression?)* ']' |
| 1069 | Expect(i::Token::LBRACK, CHECK_OK); |
| 1070 | while (peek() != i::Token::RBRACK) { |
| 1071 | if (peek() != i::Token::COMMA) { |
| 1072 | ParseAssignmentExpression(true, CHECK_OK); |
| 1073 | } |
| 1074 | if (peek() != i::Token::RBRACK) { |
| 1075 | Expect(i::Token::COMMA, CHECK_OK); |
| 1076 | } |
| 1077 | } |
| 1078 | Expect(i::Token::RBRACK, CHECK_OK); |
| 1079 | |
| 1080 | scope_->NextMaterializedLiteralIndex(); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1081 | return Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1082 | } |
| 1083 | |
| 1084 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1085 | PreParser::Expression PreParser::ParseObjectLiteral(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1086 | // ObjectLiteral :: |
| 1087 | // '{' ( |
| 1088 | // ((IdentifierName | String | Number) ':' AssignmentExpression) |
| 1089 | // | (('get' | 'set') (IdentifierName | String | Number) FunctionLiteral) |
| 1090 | // )*[','] '}' |
| 1091 | |
| 1092 | Expect(i::Token::LBRACE, CHECK_OK); |
| 1093 | while (peek() != i::Token::RBRACE) { |
| 1094 | i::Token::Value next = peek(); |
| 1095 | switch (next) { |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 1096 | case i::Token::IDENTIFIER: |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 1097 | case i::Token::FUTURE_RESERVED_WORD: |
| 1098 | case i::Token::FUTURE_STRICT_RESERVED_WORD: { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1099 | bool is_getter = false; |
| 1100 | bool is_setter = false; |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 1101 | ParseIdentifierNameOrGetOrSet(&is_getter, &is_setter, CHECK_OK); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1102 | if ((is_getter || is_setter) && peek() != i::Token::COLON) { |
| 1103 | i::Token::Value name = Next(); |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 1104 | bool is_keyword = i::Token::IsKeyword(name); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1105 | if (name != i::Token::IDENTIFIER && |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 1106 | name != i::Token::FUTURE_RESERVED_WORD && |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 1107 | name != i::Token::FUTURE_STRICT_RESERVED_WORD && |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1108 | name != i::Token::NUMBER && |
| 1109 | name != i::Token::STRING && |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 1110 | !is_keyword) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1111 | *ok = false; |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1112 | return Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1113 | } |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 1114 | if (!is_keyword) { |
| 1115 | LogSymbol(); |
| 1116 | } |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1117 | ParseFunctionLiteral(CHECK_OK); |
| 1118 | if (peek() != i::Token::RBRACE) { |
| 1119 | Expect(i::Token::COMMA, CHECK_OK); |
| 1120 | } |
| 1121 | continue; // restart the while |
| 1122 | } |
| 1123 | break; |
| 1124 | } |
| 1125 | case i::Token::STRING: |
| 1126 | Consume(next); |
| 1127 | GetStringSymbol(); |
| 1128 | break; |
| 1129 | case i::Token::NUMBER: |
| 1130 | Consume(next); |
| 1131 | break; |
| 1132 | default: |
| 1133 | if (i::Token::IsKeyword(next)) { |
| 1134 | Consume(next); |
| 1135 | } else { |
| 1136 | // Unexpected token. |
| 1137 | *ok = false; |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1138 | return Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1139 | } |
| 1140 | } |
| 1141 | |
| 1142 | Expect(i::Token::COLON, CHECK_OK); |
| 1143 | ParseAssignmentExpression(true, CHECK_OK); |
| 1144 | |
| 1145 | // TODO(1240767): Consider allowing trailing comma. |
| 1146 | if (peek() != i::Token::RBRACE) Expect(i::Token::COMMA, CHECK_OK); |
| 1147 | } |
| 1148 | Expect(i::Token::RBRACE, CHECK_OK); |
| 1149 | |
| 1150 | scope_->NextMaterializedLiteralIndex(); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1151 | return Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1152 | } |
| 1153 | |
| 1154 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1155 | PreParser::Expression PreParser::ParseRegExpLiteral(bool seen_equal, |
| 1156 | bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1157 | if (!scanner_->ScanRegExpPattern(seen_equal)) { |
| 1158 | Next(); |
| 1159 | i::JavaScriptScanner::Location location = scanner_->location(); |
| 1160 | ReportMessageAt(location.beg_pos, location.end_pos, |
| 1161 | "unterminated_regexp", NULL); |
| 1162 | *ok = false; |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1163 | return Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1164 | } |
| 1165 | |
| 1166 | scope_->NextMaterializedLiteralIndex(); |
| 1167 | |
| 1168 | if (!scanner_->ScanRegExpFlags()) { |
| 1169 | Next(); |
| 1170 | i::JavaScriptScanner::Location location = scanner_->location(); |
| 1171 | ReportMessageAt(location.beg_pos, location.end_pos, |
| 1172 | "invalid_regexp_flags", NULL); |
| 1173 | *ok = false; |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1174 | return Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1175 | } |
| 1176 | Next(); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1177 | return Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1178 | } |
| 1179 | |
| 1180 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1181 | PreParser::Arguments PreParser::ParseArguments(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1182 | // Arguments :: |
| 1183 | // '(' (AssignmentExpression)*[','] ')' |
| 1184 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1185 | Expect(i::Token::LPAREN, ok); |
| 1186 | if (!*ok) return -1; |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1187 | bool done = (peek() == i::Token::RPAREN); |
| 1188 | int argc = 0; |
| 1189 | while (!done) { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1190 | ParseAssignmentExpression(true, ok); |
| 1191 | if (!*ok) return -1; |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1192 | argc++; |
| 1193 | done = (peek() == i::Token::RPAREN); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1194 | if (!done) { |
| 1195 | Expect(i::Token::COMMA, ok); |
| 1196 | if (!*ok) return -1; |
| 1197 | } |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1198 | } |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1199 | Expect(i::Token::RPAREN, ok); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1200 | return argc; |
| 1201 | } |
| 1202 | |
| 1203 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1204 | PreParser::Expression PreParser::ParseFunctionLiteral(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1205 | // Function :: |
| 1206 | // '(' FormalParameterList? ')' '{' FunctionBody '}' |
| 1207 | |
| 1208 | // Parse function body. |
| 1209 | ScopeType outer_scope_type = scope_->type(); |
| 1210 | bool inside_with = scope_->IsInsideWith(); |
| 1211 | Scope function_scope(&scope_, kFunctionScope); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1212 | // FormalParameterList :: |
| 1213 | // '(' (Identifier)*[','] ')' |
| 1214 | Expect(i::Token::LPAREN, CHECK_OK); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 1215 | int start_position = scanner_->location().beg_pos; |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1216 | bool done = (peek() == i::Token::RPAREN); |
| 1217 | while (!done) { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1218 | Identifier id = ParseIdentifier(CHECK_OK); |
| 1219 | if (!id.IsValidStrictVariable()) { |
| 1220 | StrictModeIdentifierViolation(scanner_->location(), |
| 1221 | "strict_param_name", |
| 1222 | id, |
| 1223 | CHECK_OK); |
| 1224 | } |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1225 | done = (peek() == i::Token::RPAREN); |
| 1226 | if (!done) { |
| 1227 | Expect(i::Token::COMMA, CHECK_OK); |
| 1228 | } |
| 1229 | } |
| 1230 | Expect(i::Token::RPAREN, CHECK_OK); |
| 1231 | |
| 1232 | Expect(i::Token::LBRACE, CHECK_OK); |
| 1233 | int function_block_pos = scanner_->location().beg_pos; |
| 1234 | |
| 1235 | // Determine if the function will be lazily compiled. |
| 1236 | // Currently only happens to top-level functions. |
| 1237 | // Optimistically assume that all top-level functions are lazily compiled. |
sgjesse@chromium.org | c6c5718 | 2011-01-17 12:24:25 +0000 | [diff] [blame] | 1238 | bool is_lazily_compiled = (outer_scope_type == kTopLevelScope && |
| 1239 | !inside_with && allow_lazy_ && |
| 1240 | !parenthesized_function_); |
| 1241 | parenthesized_function_ = false; |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1242 | |
| 1243 | if (is_lazily_compiled) { |
| 1244 | log_->PauseRecording(); |
| 1245 | ParseSourceElements(i::Token::RBRACE, ok); |
| 1246 | log_->ResumeRecording(); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1247 | if (!*ok) Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1248 | |
| 1249 | Expect(i::Token::RBRACE, CHECK_OK); |
| 1250 | |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 1251 | // Position right after terminal '}'. |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1252 | int end_pos = scanner_->location().end_pos; |
| 1253 | log_->LogFunction(function_block_pos, end_pos, |
| 1254 | function_scope.materialized_literal_count(), |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 1255 | function_scope.expected_properties(), |
| 1256 | strict_mode() ? 1 : 0); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1257 | } else { |
| 1258 | ParseSourceElements(i::Token::RBRACE, CHECK_OK); |
| 1259 | Expect(i::Token::RBRACE, CHECK_OK); |
| 1260 | } |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 1261 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1262 | if (strict_mode()) { |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 1263 | int end_position = scanner_->location().end_pos; |
| 1264 | CheckOctalLiteral(start_position, end_position, CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1265 | CheckDelayedStrictModeViolation(start_position, end_position, CHECK_OK); |
| 1266 | return Expression::StrictFunction(); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 1267 | } |
| 1268 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1269 | return Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1270 | } |
| 1271 | |
| 1272 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1273 | PreParser::Expression PreParser::ParseV8Intrinsic(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1274 | // CallRuntime :: |
| 1275 | // '%' Identifier Arguments |
| 1276 | |
| 1277 | Expect(i::Token::MOD, CHECK_OK); |
| 1278 | ParseIdentifier(CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1279 | ParseArguments(ok); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1280 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1281 | return Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1282 | } |
| 1283 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1284 | #undef CHECK_OK |
| 1285 | |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1286 | |
| 1287 | void PreParser::ExpectSemicolon(bool* ok) { |
| 1288 | // Check for automatic semicolon insertion according to |
| 1289 | // the rules given in ECMA-262, section 7.9, page 21. |
| 1290 | i::Token::Value tok = peek(); |
| 1291 | if (tok == i::Token::SEMICOLON) { |
| 1292 | Next(); |
| 1293 | return; |
| 1294 | } |
whesse@chromium.org | df8c03c | 2011-06-21 14:36:03 +0000 | [diff] [blame] | 1295 | if (scanner_->HasAnyLineTerminatorBeforeNext() || |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1296 | tok == i::Token::RBRACE || |
| 1297 | tok == i::Token::EOS) { |
| 1298 | return; |
| 1299 | } |
| 1300 | Expect(i::Token::SEMICOLON, ok); |
| 1301 | } |
| 1302 | |
| 1303 | |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 1304 | void PreParser::LogSymbol() { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1305 | int identifier_pos = scanner_->location().beg_pos; |
fschneider@chromium.org | 9e3e0b6 | 2011-01-03 10:16:46 +0000 | [diff] [blame] | 1306 | if (scanner_->is_literal_ascii()) { |
| 1307 | log_->LogAsciiSymbol(identifier_pos, scanner_->literal_ascii_string()); |
| 1308 | } else { |
| 1309 | log_->LogUC16Symbol(identifier_pos, scanner_->literal_uc16_string()); |
| 1310 | } |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 1311 | } |
| 1312 | |
| 1313 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1314 | PreParser::Expression PreParser::GetStringSymbol() { |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 1315 | const int kUseStrictLength = 10; |
| 1316 | const char* kUseStrictChars = "use strict"; |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 1317 | LogSymbol(); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 1318 | if (scanner_->is_literal_ascii() && |
| 1319 | scanner_->literal_length() == kUseStrictLength && |
| 1320 | !scanner_->literal_contains_escapes() && |
| 1321 | !strncmp(scanner_->literal_ascii_string().start(), kUseStrictChars, |
| 1322 | kUseStrictLength)) { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1323 | return Expression::UseStrictStringLiteral(); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 1324 | } |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1325 | return Expression::StringLiteral(); |
| 1326 | } |
| 1327 | |
| 1328 | |
| 1329 | PreParser::Identifier PreParser::GetIdentifierSymbol() { |
| 1330 | LogSymbol(); |
| 1331 | if (scanner_->current_token() == i::Token::FUTURE_RESERVED_WORD) { |
| 1332 | return Identifier::FutureReserved(); |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 1333 | } else if (scanner_->current_token() == |
| 1334 | i::Token::FUTURE_STRICT_RESERVED_WORD) { |
| 1335 | return Identifier::FutureStrictReserved(); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1336 | } |
| 1337 | if (scanner_->is_literal_ascii()) { |
| 1338 | // Detect strict-mode poison words. |
| 1339 | if (scanner_->literal_length() == 4 && |
| 1340 | !strncmp(scanner_->literal_ascii_string().start(), "eval", 4)) { |
| 1341 | return Identifier::Eval(); |
| 1342 | } |
| 1343 | if (scanner_->literal_length() == 9 && |
| 1344 | !strncmp(scanner_->literal_ascii_string().start(), "arguments", 9)) { |
| 1345 | return Identifier::Arguments(); |
| 1346 | } |
| 1347 | } |
| 1348 | return Identifier::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1349 | } |
| 1350 | |
| 1351 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1352 | PreParser::Identifier PreParser::ParseIdentifier(bool* ok) { |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 1353 | i::Token::Value next = Next(); |
| 1354 | switch (next) { |
| 1355 | case i::Token::FUTURE_RESERVED_WORD: { |
| 1356 | i::Scanner::Location location = scanner_->location(); |
| 1357 | ReportMessageAt(location.beg_pos, location.end_pos, |
| 1358 | "reserved_word", NULL); |
| 1359 | *ok = false; |
| 1360 | } |
| 1361 | // FALLTHROUGH |
| 1362 | case i::Token::FUTURE_STRICT_RESERVED_WORD: |
| 1363 | case i::Token::IDENTIFIER: |
| 1364 | return GetIdentifierSymbol(); |
| 1365 | default: |
| 1366 | *ok = false; |
| 1367 | return Identifier::Default(); |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 1368 | } |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1369 | } |
| 1370 | |
| 1371 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1372 | void PreParser::SetStrictModeViolation(i::Scanner::Location location, |
| 1373 | const char* type, |
| 1374 | bool* ok) { |
| 1375 | if (strict_mode()) { |
| 1376 | ReportMessageAt(location.beg_pos, location.end_pos, type, NULL); |
| 1377 | *ok = false; |
| 1378 | return; |
| 1379 | } |
| 1380 | // Delay report in case this later turns out to be strict code |
| 1381 | // (i.e., for function names and parameters prior to a "use strict" |
| 1382 | // directive). |
| 1383 | strict_mode_violation_location_ = location; |
| 1384 | strict_mode_violation_type_ = type; |
| 1385 | } |
| 1386 | |
| 1387 | |
| 1388 | void PreParser::CheckDelayedStrictModeViolation(int beg_pos, |
| 1389 | int end_pos, |
| 1390 | bool* ok) { |
| 1391 | i::Scanner::Location location = strict_mode_violation_location_; |
| 1392 | if (location.IsValid() && |
| 1393 | location.beg_pos > beg_pos && location.end_pos < end_pos) { |
| 1394 | ReportMessageAt(location.beg_pos, location.end_pos, |
| 1395 | strict_mode_violation_type_, NULL); |
| 1396 | *ok = false; |
| 1397 | } |
| 1398 | strict_mode_violation_location_ = i::Scanner::Location::invalid(); |
| 1399 | } |
| 1400 | |
| 1401 | |
| 1402 | void PreParser::StrictModeIdentifierViolation(i::Scanner::Location location, |
| 1403 | const char* eval_args_type, |
| 1404 | Identifier identifier, |
| 1405 | bool* ok) { |
| 1406 | const char* type = eval_args_type; |
| 1407 | if (identifier.IsFutureReserved()) { |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 1408 | type = "reserved_word"; |
| 1409 | } else if (identifier.IsFutureStrictReserved()) { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1410 | type = "strict_reserved_word"; |
| 1411 | } |
| 1412 | if (strict_mode()) { |
| 1413 | ReportMessageAt(location.beg_pos, location.end_pos, type, NULL); |
| 1414 | *ok = false; |
| 1415 | return; |
| 1416 | } |
| 1417 | strict_mode_violation_location_ = location; |
| 1418 | strict_mode_violation_type_ = type; |
| 1419 | } |
| 1420 | |
| 1421 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1422 | PreParser::Identifier PreParser::ParseIdentifierName(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1423 | i::Token::Value next = Next(); |
| 1424 | if (i::Token::IsKeyword(next)) { |
| 1425 | int pos = scanner_->location().beg_pos; |
| 1426 | const char* keyword = i::Token::String(next); |
fschneider@chromium.org | 9e3e0b6 | 2011-01-03 10:16:46 +0000 | [diff] [blame] | 1427 | log_->LogAsciiSymbol(pos, i::Vector<const char>(keyword, |
| 1428 | i::StrLength(keyword))); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1429 | return Identifier::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1430 | } |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 1431 | if (next == i::Token::IDENTIFIER || |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 1432 | next == i::Token::FUTURE_RESERVED_WORD || |
| 1433 | next == i::Token::FUTURE_STRICT_RESERVED_WORD) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1434 | return GetIdentifierSymbol(); |
| 1435 | } |
| 1436 | *ok = false; |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1437 | return Identifier::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1438 | } |
| 1439 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1440 | #undef CHECK_OK |
| 1441 | |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1442 | |
| 1443 | // This function reads an identifier and determines whether or not it |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 1444 | // is 'get' or 'set'. |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 1445 | PreParser::Identifier PreParser::ParseIdentifierNameOrGetOrSet(bool* is_get, |
| 1446 | bool* is_set, |
| 1447 | bool* ok) { |
| 1448 | Identifier result = ParseIdentifierName(ok); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1449 | if (!*ok) return Identifier::Default(); |
| 1450 | if (scanner_->is_literal_ascii() && |
| 1451 | scanner_->literal_length() == 3) { |
fschneider@chromium.org | 9e3e0b6 | 2011-01-03 10:16:46 +0000 | [diff] [blame] | 1452 | const char* token = scanner_->literal_ascii_string().start(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1453 | *is_get = strncmp(token, "get", 3) == 0; |
| 1454 | *is_set = !*is_get && strncmp(token, "set", 3) == 0; |
| 1455 | } |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 1456 | return result; |
| 1457 | } |
| 1458 | |
| 1459 | bool PreParser::peek_any_identifier() { |
| 1460 | i::Token::Value next = peek(); |
| 1461 | return next == i::Token::IDENTIFIER || |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 1462 | next == i::Token::FUTURE_RESERVED_WORD || |
| 1463 | next == i::Token::FUTURE_STRICT_RESERVED_WORD; |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1464 | } |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1465 | } } // v8::preparser |