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 | |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 59 | void PreParser::ReportUnexpectedToken(i::Token::Value token) { |
| 60 | // We don't report stack overflows here, to avoid increasing the |
| 61 | // stack depth even further. Instead we report it after parsing is |
| 62 | // over, in ParseProgram. |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 63 | if (token == i::Token::ILLEGAL && stack_overflow_) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 64 | return; |
| 65 | } |
| 66 | i::JavaScriptScanner::Location source_location = scanner_->location(); |
| 67 | |
| 68 | // Four of the tokens are treated specially |
| 69 | switch (token) { |
| 70 | case i::Token::EOS: |
| 71 | return ReportMessageAt(source_location.beg_pos, source_location.end_pos, |
| 72 | "unexpected_eos", NULL); |
| 73 | case i::Token::NUMBER: |
| 74 | return ReportMessageAt(source_location.beg_pos, source_location.end_pos, |
| 75 | "unexpected_token_number", NULL); |
| 76 | case i::Token::STRING: |
| 77 | return ReportMessageAt(source_location.beg_pos, source_location.end_pos, |
| 78 | "unexpected_token_string", NULL); |
| 79 | case i::Token::IDENTIFIER: |
| 80 | return ReportMessageAt(source_location.beg_pos, source_location.end_pos, |
| 81 | "unexpected_token_identifier", NULL); |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 82 | case i::Token::FUTURE_RESERVED_WORD: |
| 83 | return ReportMessageAt(source_location.beg_pos, source_location.end_pos, |
| 84 | "unexpected_reserved", NULL); |
| 85 | case i::Token::FUTURE_STRICT_RESERVED_WORD: |
| 86 | return ReportMessageAt(source_location.beg_pos, source_location.end_pos, |
| 87 | "unexpected_strict_reserved", NULL); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 88 | default: |
| 89 | const char* name = i::Token::String(token); |
| 90 | ReportMessageAt(source_location.beg_pos, source_location.end_pos, |
| 91 | "unexpected_token", name); |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 96 | // Checks whether octal literal last seen is between beg_pos and end_pos. |
| 97 | // If so, reports an error. |
| 98 | void PreParser::CheckOctalLiteral(int beg_pos, int end_pos, bool* ok) { |
| 99 | i::Scanner::Location octal = scanner_->octal_position(); |
| 100 | if (beg_pos <= octal.beg_pos && octal.end_pos <= end_pos) { |
| 101 | ReportMessageAt(octal.beg_pos, octal.end_pos, "strict_octal_literal", NULL); |
| 102 | scanner_->clear_octal_position(); |
| 103 | *ok = false; |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 108 | #define CHECK_OK ok); \ |
| 109 | if (!*ok) return kUnknownSourceElements; \ |
| 110 | ((void)0 |
| 111 | #define DUMMY ) // to make indentation work |
| 112 | #undef DUMMY |
| 113 | |
| 114 | |
danno@chromium.org | b645116 | 2011-08-17 14:33:23 +0000 | [diff] [blame] | 115 | PreParser::Statement PreParser::ParseSourceElement(bool* ok) { |
| 116 | switch (peek()) { |
| 117 | case i::Token::LET: |
| 118 | return ParseVariableStatement(kSourceElement, ok); |
| 119 | default: |
| 120 | return ParseStatement(ok); |
| 121 | } |
| 122 | } |
| 123 | |
| 124 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 125 | PreParser::SourceElements PreParser::ParseSourceElements(int end_token, |
| 126 | bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 127 | // SourceElements :: |
| 128 | // (Statement)* <end_token> |
| 129 | |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 130 | bool allow_directive_prologue = true; |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 131 | while (peek() != end_token) { |
danno@chromium.org | b645116 | 2011-08-17 14:33:23 +0000 | [diff] [blame] | 132 | Statement statement = ParseSourceElement(CHECK_OK); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 133 | if (allow_directive_prologue) { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 134 | if (statement.IsUseStrictLiteral()) { |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 135 | set_strict_mode(); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 136 | } else if (!statement.IsStringLiteral()) { |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 137 | allow_directive_prologue = false; |
| 138 | } |
| 139 | } |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 140 | } |
| 141 | return kUnknownSourceElements; |
| 142 | } |
| 143 | |
| 144 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 145 | #undef CHECK_OK |
| 146 | #define CHECK_OK ok); \ |
| 147 | if (!*ok) return Statement::Default(); \ |
| 148 | ((void)0 |
| 149 | #define DUMMY ) // to make indentation work |
| 150 | #undef DUMMY |
| 151 | |
| 152 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 153 | PreParser::Statement PreParser::ParseStatement(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 154 | // Statement :: |
| 155 | // Block |
| 156 | // VariableStatement |
| 157 | // EmptyStatement |
| 158 | // ExpressionStatement |
| 159 | // IfStatement |
| 160 | // IterationStatement |
| 161 | // ContinueStatement |
| 162 | // BreakStatement |
| 163 | // ReturnStatement |
| 164 | // WithStatement |
| 165 | // LabelledStatement |
| 166 | // SwitchStatement |
| 167 | // ThrowStatement |
| 168 | // TryStatement |
| 169 | // DebuggerStatement |
| 170 | |
| 171 | // Note: Since labels can only be used by 'break' and 'continue' |
| 172 | // statements, which themselves are only valid within blocks, |
| 173 | // iterations or 'switch' statements (i.e., BreakableStatements), |
| 174 | // labels can be simply ignored in all other cases; except for |
| 175 | // trivial labeled break statements 'label: break label' which is |
| 176 | // parsed into an empty statement. |
| 177 | |
| 178 | // Keep the source position of the statement |
| 179 | switch (peek()) { |
| 180 | case i::Token::LBRACE: |
| 181 | return ParseBlock(ok); |
| 182 | |
| 183 | case i::Token::CONST: |
| 184 | case i::Token::VAR: |
danno@chromium.org | b645116 | 2011-08-17 14:33:23 +0000 | [diff] [blame] | 185 | return ParseVariableStatement(kStatement, ok); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 186 | |
| 187 | case i::Token::SEMICOLON: |
| 188 | Next(); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 189 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 190 | |
| 191 | case i::Token::IF: |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 192 | return ParseIfStatement(ok); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 193 | |
| 194 | case i::Token::DO: |
| 195 | return ParseDoWhileStatement(ok); |
| 196 | |
| 197 | case i::Token::WHILE: |
| 198 | return ParseWhileStatement(ok); |
| 199 | |
| 200 | case i::Token::FOR: |
| 201 | return ParseForStatement(ok); |
| 202 | |
| 203 | case i::Token::CONTINUE: |
| 204 | return ParseContinueStatement(ok); |
| 205 | |
| 206 | case i::Token::BREAK: |
| 207 | return ParseBreakStatement(ok); |
| 208 | |
| 209 | case i::Token::RETURN: |
| 210 | return ParseReturnStatement(ok); |
| 211 | |
| 212 | case i::Token::WITH: |
| 213 | return ParseWithStatement(ok); |
| 214 | |
| 215 | case i::Token::SWITCH: |
| 216 | return ParseSwitchStatement(ok); |
| 217 | |
| 218 | case i::Token::THROW: |
| 219 | return ParseThrowStatement(ok); |
| 220 | |
| 221 | case i::Token::TRY: |
| 222 | return ParseTryStatement(ok); |
| 223 | |
| 224 | case i::Token::FUNCTION: |
| 225 | return ParseFunctionDeclaration(ok); |
| 226 | |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 227 | case i::Token::DEBUGGER: |
| 228 | return ParseDebuggerStatement(ok); |
| 229 | |
| 230 | default: |
| 231 | return ParseExpressionOrLabelledStatement(ok); |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 236 | PreParser::Statement PreParser::ParseFunctionDeclaration(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 237 | // FunctionDeclaration :: |
| 238 | // 'function' Identifier '(' FormalParameterListopt ')' '{' FunctionBody '}' |
| 239 | Expect(i::Token::FUNCTION, CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 240 | |
| 241 | Identifier identifier = ParseIdentifier(CHECK_OK); |
| 242 | i::Scanner::Location location = scanner_->location(); |
| 243 | |
| 244 | Expression function_value = ParseFunctionLiteral(CHECK_OK); |
| 245 | |
| 246 | if (function_value.IsStrictFunction() && |
| 247 | !identifier.IsValidStrictVariable()) { |
| 248 | // Strict mode violation, using either reserved word or eval/arguments |
| 249 | // as name of strict function. |
| 250 | const char* type = "strict_function_name"; |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 251 | if (identifier.IsFutureStrictReserved()) { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 252 | type = "strict_reserved_word"; |
| 253 | } |
| 254 | ReportMessageAt(location.beg_pos, location.end_pos, type, NULL); |
| 255 | *ok = false; |
| 256 | } |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 257 | return Statement::FunctionDeclaration(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 258 | } |
| 259 | |
| 260 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 261 | PreParser::Statement PreParser::ParseBlock(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 262 | // Block :: |
| 263 | // '{' Statement* '}' |
| 264 | |
| 265 | // Note that a Block does not introduce a new execution scope! |
| 266 | // (ECMA-262, 3rd, 12.2) |
| 267 | // |
| 268 | Expect(i::Token::LBRACE, CHECK_OK); |
| 269 | while (peek() != i::Token::RBRACE) { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 270 | i::Scanner::Location start_location = scanner_->peek_location(); |
danno@chromium.org | b645116 | 2011-08-17 14:33:23 +0000 | [diff] [blame] | 271 | Statement statement = ParseSourceElement(CHECK_OK); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 272 | i::Scanner::Location end_location = scanner_->location(); |
| 273 | if (strict_mode() && statement.IsFunctionDeclaration()) { |
| 274 | ReportMessageAt(start_location.beg_pos, end_location.end_pos, |
| 275 | "strict_function", NULL); |
| 276 | *ok = false; |
| 277 | return Statement::Default(); |
| 278 | } |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 279 | } |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 280 | Expect(i::Token::RBRACE, ok); |
| 281 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 282 | } |
| 283 | |
| 284 | |
danno@chromium.org | b645116 | 2011-08-17 14:33:23 +0000 | [diff] [blame] | 285 | PreParser::Statement PreParser::ParseVariableStatement( |
| 286 | VariableDeclarationContext var_context, |
| 287 | bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 288 | // VariableStatement :: |
| 289 | // VariableDeclarations ';' |
| 290 | |
danno@chromium.org | b645116 | 2011-08-17 14:33:23 +0000 | [diff] [blame] | 291 | Statement result = ParseVariableDeclarations(var_context, |
| 292 | NULL, |
| 293 | CHECK_OK); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 294 | ExpectSemicolon(CHECK_OK); |
| 295 | return result; |
| 296 | } |
| 297 | |
| 298 | |
| 299 | // If the variable declaration declares exactly one non-const |
| 300 | // variable, then *var is set to that variable. In all other cases, |
| 301 | // *var is untouched; in particular, it is the caller's responsibility |
| 302 | // to initialize it properly. This mechanism is also used for the parsing |
| 303 | // of 'for-in' loops. |
danno@chromium.org | b645116 | 2011-08-17 14:33:23 +0000 | [diff] [blame] | 304 | PreParser::Statement PreParser::ParseVariableDeclarations( |
| 305 | VariableDeclarationContext var_context, |
| 306 | int* num_decl, |
| 307 | bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 308 | // VariableDeclarations :: |
| 309 | // ('var' | 'const') (Identifier ('=' AssignmentExpression)?)+[','] |
| 310 | |
| 311 | if (peek() == i::Token::VAR) { |
| 312 | Consume(i::Token::VAR); |
| 313 | } else if (peek() == i::Token::CONST) { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 314 | if (strict_mode()) { |
| 315 | i::Scanner::Location location = scanner_->peek_location(); |
| 316 | ReportMessageAt(location.beg_pos, location.end_pos, |
| 317 | "strict_const", NULL); |
| 318 | *ok = false; |
| 319 | return Statement::Default(); |
| 320 | } |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 321 | Consume(i::Token::CONST); |
danno@chromium.org | b645116 | 2011-08-17 14:33:23 +0000 | [diff] [blame] | 322 | } else if (peek() == i::Token::LET) { |
| 323 | if (var_context != kSourceElement && |
| 324 | var_context != kForStatement) { |
| 325 | i::Scanner::Location location = scanner_->peek_location(); |
| 326 | ReportMessageAt(location.beg_pos, location.end_pos, |
| 327 | "unprotected_let", NULL); |
| 328 | *ok = false; |
| 329 | return Statement::Default(); |
| 330 | } |
| 331 | Consume(i::Token::LET); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 332 | } else { |
| 333 | *ok = false; |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 334 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 335 | } |
| 336 | |
danno@chromium.org | b645116 | 2011-08-17 14:33:23 +0000 | [diff] [blame] | 337 | // The scope of a var/const declared variable anywhere inside a function |
| 338 | // is the entire function (ECMA-262, 3rd, 10.1.3, and 12.2). The scope |
| 339 | // of a let declared variable is the scope of the immediately enclosing |
| 340 | // block. |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 341 | int nvars = 0; // the number of variables declared |
| 342 | do { |
| 343 | // Parse variable name. |
| 344 | if (nvars > 0) Consume(i::Token::COMMA); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 345 | Identifier identifier = ParseIdentifier(CHECK_OK); |
| 346 | if (strict_mode() && !identifier.IsValidStrictVariable()) { |
| 347 | StrictModeIdentifierViolation(scanner_->location(), |
| 348 | "strict_var_name", |
| 349 | identifier, |
| 350 | ok); |
| 351 | return Statement::Default(); |
| 352 | } |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 353 | nvars++; |
| 354 | if (peek() == i::Token::ASSIGN) { |
| 355 | Expect(i::Token::ASSIGN, CHECK_OK); |
danno@chromium.org | b645116 | 2011-08-17 14:33:23 +0000 | [diff] [blame] | 356 | ParseAssignmentExpression(var_context != kForStatement, CHECK_OK); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 357 | } |
| 358 | } while (peek() == i::Token::COMMA); |
| 359 | |
| 360 | if (num_decl != NULL) *num_decl = nvars; |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 361 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 362 | } |
| 363 | |
| 364 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 365 | PreParser::Statement PreParser::ParseExpressionOrLabelledStatement(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 366 | // ExpressionStatement | LabelledStatement :: |
| 367 | // Expression ';' |
| 368 | // Identifier ':' Statement |
| 369 | |
| 370 | Expression expr = ParseExpression(true, CHECK_OK); |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 371 | if (expr.IsRawIdentifier()) { |
| 372 | if (peek() == i::Token::COLON && |
| 373 | (!strict_mode() || !expr.AsIdentifier().IsFutureReserved())) { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 374 | Consume(i::Token::COLON); |
| 375 | i::Scanner::Location start_location = scanner_->peek_location(); |
| 376 | Statement statement = ParseStatement(CHECK_OK); |
| 377 | if (strict_mode() && statement.IsFunctionDeclaration()) { |
| 378 | i::Scanner::Location end_location = scanner_->location(); |
| 379 | ReportMessageAt(start_location.beg_pos, end_location.end_pos, |
| 380 | "strict_function", NULL); |
| 381 | *ok = false; |
| 382 | } |
| 383 | return Statement::Default(); |
| 384 | } |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 385 | // Preparsing is disabled for extensions (because the extension details |
| 386 | // aren't passed to lazily compiled functions), so we don't |
| 387 | // accept "native function" in the preparser. |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 388 | } |
| 389 | // Parsed expression statement. |
| 390 | ExpectSemicolon(CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 391 | return Statement::ExpressionStatement(expr); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 392 | } |
| 393 | |
| 394 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 395 | PreParser::Statement PreParser::ParseIfStatement(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 396 | // IfStatement :: |
| 397 | // 'if' '(' Expression ')' Statement ('else' Statement)? |
| 398 | |
| 399 | Expect(i::Token::IF, CHECK_OK); |
| 400 | Expect(i::Token::LPAREN, CHECK_OK); |
| 401 | ParseExpression(true, CHECK_OK); |
| 402 | Expect(i::Token::RPAREN, CHECK_OK); |
| 403 | ParseStatement(CHECK_OK); |
| 404 | if (peek() == i::Token::ELSE) { |
| 405 | Next(); |
| 406 | ParseStatement(CHECK_OK); |
| 407 | } |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 408 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 409 | } |
| 410 | |
| 411 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 412 | PreParser::Statement PreParser::ParseContinueStatement(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 413 | // ContinueStatement :: |
| 414 | // 'continue' [no line terminator] Identifier? ';' |
| 415 | |
| 416 | Expect(i::Token::CONTINUE, CHECK_OK); |
| 417 | i::Token::Value tok = peek(); |
whesse@chromium.org | df8c03c | 2011-06-21 14:36:03 +0000 | [diff] [blame] | 418 | if (!scanner_->HasAnyLineTerminatorBeforeNext() && |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 419 | tok != i::Token::SEMICOLON && |
| 420 | tok != i::Token::RBRACE && |
| 421 | tok != i::Token::EOS) { |
| 422 | ParseIdentifier(CHECK_OK); |
| 423 | } |
| 424 | ExpectSemicolon(CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 425 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 426 | } |
| 427 | |
| 428 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 429 | PreParser::Statement PreParser::ParseBreakStatement(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 430 | // BreakStatement :: |
| 431 | // 'break' [no line terminator] Identifier? ';' |
| 432 | |
| 433 | Expect(i::Token::BREAK, CHECK_OK); |
| 434 | i::Token::Value tok = peek(); |
whesse@chromium.org | df8c03c | 2011-06-21 14:36:03 +0000 | [diff] [blame] | 435 | if (!scanner_->HasAnyLineTerminatorBeforeNext() && |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 436 | tok != i::Token::SEMICOLON && |
| 437 | tok != i::Token::RBRACE && |
| 438 | tok != i::Token::EOS) { |
| 439 | ParseIdentifier(CHECK_OK); |
| 440 | } |
| 441 | ExpectSemicolon(CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 442 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 443 | } |
| 444 | |
| 445 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 446 | PreParser::Statement PreParser::ParseReturnStatement(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 447 | // ReturnStatement :: |
| 448 | // 'return' [no line terminator] Expression? ';' |
| 449 | |
| 450 | // Consume the return token. It is necessary to do the before |
| 451 | // reporting any errors on it, because of the way errors are |
| 452 | // reported (underlining). |
| 453 | Expect(i::Token::RETURN, CHECK_OK); |
| 454 | |
| 455 | // An ECMAScript program is considered syntactically incorrect if it |
| 456 | // contains a return statement that is not within the body of a |
| 457 | // function. See ECMA-262, section 12.9, page 67. |
| 458 | // This is not handled during preparsing. |
| 459 | |
| 460 | i::Token::Value tok = peek(); |
whesse@chromium.org | df8c03c | 2011-06-21 14:36:03 +0000 | [diff] [blame] | 461 | if (!scanner_->HasAnyLineTerminatorBeforeNext() && |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 462 | tok != i::Token::SEMICOLON && |
| 463 | tok != i::Token::RBRACE && |
| 464 | tok != i::Token::EOS) { |
| 465 | ParseExpression(true, CHECK_OK); |
| 466 | } |
| 467 | ExpectSemicolon(CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 468 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 469 | } |
| 470 | |
| 471 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 472 | PreParser::Statement PreParser::ParseWithStatement(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 473 | // WithStatement :: |
| 474 | // 'with' '(' Expression ')' Statement |
| 475 | Expect(i::Token::WITH, CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 476 | if (strict_mode()) { |
| 477 | i::Scanner::Location location = scanner_->location(); |
| 478 | ReportMessageAt(location.beg_pos, location.end_pos, |
| 479 | "strict_mode_with", NULL); |
| 480 | *ok = false; |
| 481 | return Statement::Default(); |
| 482 | } |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 483 | Expect(i::Token::LPAREN, CHECK_OK); |
| 484 | ParseExpression(true, CHECK_OK); |
| 485 | Expect(i::Token::RPAREN, CHECK_OK); |
| 486 | |
| 487 | scope_->EnterWith(); |
| 488 | ParseStatement(CHECK_OK); |
| 489 | scope_->LeaveWith(); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 490 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 491 | } |
| 492 | |
| 493 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 494 | PreParser::Statement PreParser::ParseSwitchStatement(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 495 | // SwitchStatement :: |
| 496 | // 'switch' '(' Expression ')' '{' CaseClause* '}' |
| 497 | |
| 498 | Expect(i::Token::SWITCH, CHECK_OK); |
| 499 | Expect(i::Token::LPAREN, CHECK_OK); |
| 500 | ParseExpression(true, CHECK_OK); |
| 501 | Expect(i::Token::RPAREN, CHECK_OK); |
| 502 | |
| 503 | Expect(i::Token::LBRACE, CHECK_OK); |
| 504 | i::Token::Value token = peek(); |
| 505 | while (token != i::Token::RBRACE) { |
| 506 | if (token == i::Token::CASE) { |
| 507 | Expect(i::Token::CASE, CHECK_OK); |
| 508 | ParseExpression(true, CHECK_OK); |
| 509 | Expect(i::Token::COLON, CHECK_OK); |
| 510 | } else if (token == i::Token::DEFAULT) { |
| 511 | Expect(i::Token::DEFAULT, CHECK_OK); |
| 512 | Expect(i::Token::COLON, CHECK_OK); |
| 513 | } else { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 514 | i::Scanner::Location start_location = scanner_->peek_location(); |
| 515 | Statement statement = ParseStatement(CHECK_OK); |
| 516 | if (strict_mode() && statement.IsFunctionDeclaration()) { |
| 517 | i::Scanner::Location end_location = scanner_->location(); |
| 518 | ReportMessageAt(start_location.beg_pos, end_location.end_pos, |
| 519 | "strict_function", NULL); |
| 520 | *ok = false; |
| 521 | return Statement::Default(); |
| 522 | } |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 523 | } |
| 524 | token = peek(); |
| 525 | } |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 526 | Expect(i::Token::RBRACE, ok); |
| 527 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 528 | } |
| 529 | |
| 530 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 531 | PreParser::Statement PreParser::ParseDoWhileStatement(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 532 | // DoStatement :: |
| 533 | // 'do' Statement 'while' '(' Expression ')' ';' |
| 534 | |
| 535 | Expect(i::Token::DO, CHECK_OK); |
| 536 | ParseStatement(CHECK_OK); |
| 537 | Expect(i::Token::WHILE, CHECK_OK); |
| 538 | Expect(i::Token::LPAREN, CHECK_OK); |
| 539 | ParseExpression(true, CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 540 | Expect(i::Token::RPAREN, ok); |
| 541 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 542 | } |
| 543 | |
| 544 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 545 | PreParser::Statement PreParser::ParseWhileStatement(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 546 | // WhileStatement :: |
| 547 | // 'while' '(' Expression ')' Statement |
| 548 | |
| 549 | Expect(i::Token::WHILE, CHECK_OK); |
| 550 | Expect(i::Token::LPAREN, CHECK_OK); |
| 551 | ParseExpression(true, CHECK_OK); |
| 552 | Expect(i::Token::RPAREN, CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 553 | ParseStatement(ok); |
| 554 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 555 | } |
| 556 | |
| 557 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 558 | PreParser::Statement PreParser::ParseForStatement(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 559 | // ForStatement :: |
| 560 | // 'for' '(' Expression? ';' Expression? ';' Expression? ')' Statement |
| 561 | |
| 562 | Expect(i::Token::FOR, CHECK_OK); |
| 563 | Expect(i::Token::LPAREN, CHECK_OK); |
| 564 | if (peek() != i::Token::SEMICOLON) { |
danno@chromium.org | b645116 | 2011-08-17 14:33:23 +0000 | [diff] [blame] | 565 | if (peek() == i::Token::VAR || peek() == i::Token::CONST || |
| 566 | peek() == i::Token::LET) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 567 | int decl_count; |
danno@chromium.org | b645116 | 2011-08-17 14:33:23 +0000 | [diff] [blame] | 568 | ParseVariableDeclarations(kForStatement, &decl_count, CHECK_OK); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 569 | if (peek() == i::Token::IN && decl_count == 1) { |
| 570 | Expect(i::Token::IN, CHECK_OK); |
| 571 | ParseExpression(true, CHECK_OK); |
| 572 | Expect(i::Token::RPAREN, CHECK_OK); |
| 573 | |
| 574 | ParseStatement(CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 575 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 576 | } |
| 577 | } else { |
| 578 | ParseExpression(false, CHECK_OK); |
| 579 | if (peek() == i::Token::IN) { |
| 580 | Expect(i::Token::IN, CHECK_OK); |
| 581 | ParseExpression(true, CHECK_OK); |
| 582 | Expect(i::Token::RPAREN, CHECK_OK); |
| 583 | |
| 584 | ParseStatement(CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 585 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 586 | } |
| 587 | } |
| 588 | } |
| 589 | |
| 590 | // Parsed initializer at this point. |
| 591 | Expect(i::Token::SEMICOLON, CHECK_OK); |
| 592 | |
| 593 | if (peek() != i::Token::SEMICOLON) { |
| 594 | ParseExpression(true, CHECK_OK); |
| 595 | } |
| 596 | Expect(i::Token::SEMICOLON, CHECK_OK); |
| 597 | |
| 598 | if (peek() != i::Token::RPAREN) { |
| 599 | ParseExpression(true, CHECK_OK); |
| 600 | } |
| 601 | Expect(i::Token::RPAREN, CHECK_OK); |
| 602 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 603 | ParseStatement(ok); |
| 604 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 605 | } |
| 606 | |
| 607 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 608 | PreParser::Statement PreParser::ParseThrowStatement(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 609 | // ThrowStatement :: |
| 610 | // 'throw' [no line terminator] Expression ';' |
| 611 | |
| 612 | Expect(i::Token::THROW, CHECK_OK); |
whesse@chromium.org | df8c03c | 2011-06-21 14:36:03 +0000 | [diff] [blame] | 613 | if (scanner_->HasAnyLineTerminatorBeforeNext()) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 614 | i::JavaScriptScanner::Location pos = scanner_->location(); |
| 615 | ReportMessageAt(pos.beg_pos, pos.end_pos, |
| 616 | "newline_after_throw", NULL); |
| 617 | *ok = false; |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 618 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 619 | } |
| 620 | ParseExpression(true, CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 621 | ExpectSemicolon(ok); |
| 622 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 623 | } |
| 624 | |
| 625 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 626 | PreParser::Statement PreParser::ParseTryStatement(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 627 | // TryStatement :: |
| 628 | // 'try' Block Catch |
| 629 | // 'try' Block Finally |
| 630 | // 'try' Block Catch Finally |
| 631 | // |
| 632 | // Catch :: |
| 633 | // 'catch' '(' Identifier ')' Block |
| 634 | // |
| 635 | // Finally :: |
| 636 | // 'finally' Block |
| 637 | |
| 638 | // In preparsing, allow any number of catch/finally blocks, including zero |
| 639 | // of both. |
| 640 | |
| 641 | Expect(i::Token::TRY, CHECK_OK); |
| 642 | |
| 643 | ParseBlock(CHECK_OK); |
| 644 | |
| 645 | bool catch_or_finally_seen = false; |
| 646 | if (peek() == i::Token::CATCH) { |
| 647 | Consume(i::Token::CATCH); |
| 648 | Expect(i::Token::LPAREN, CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 649 | Identifier id = ParseIdentifier(CHECK_OK); |
| 650 | if (strict_mode() && !id.IsValidStrictVariable()) { |
| 651 | StrictModeIdentifierViolation(scanner_->location(), |
| 652 | "strict_catch_variable", |
| 653 | id, |
| 654 | ok); |
| 655 | return Statement::Default(); |
| 656 | } |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 657 | Expect(i::Token::RPAREN, CHECK_OK); |
| 658 | scope_->EnterWith(); |
| 659 | ParseBlock(ok); |
| 660 | scope_->LeaveWith(); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 661 | if (!*ok) Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 662 | catch_or_finally_seen = true; |
| 663 | } |
| 664 | if (peek() == i::Token::FINALLY) { |
| 665 | Consume(i::Token::FINALLY); |
| 666 | ParseBlock(CHECK_OK); |
| 667 | catch_or_finally_seen = true; |
| 668 | } |
| 669 | if (!catch_or_finally_seen) { |
| 670 | *ok = false; |
| 671 | } |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 672 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 673 | } |
| 674 | |
| 675 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 676 | PreParser::Statement PreParser::ParseDebuggerStatement(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 677 | // In ECMA-262 'debugger' is defined as a reserved keyword. In some browser |
| 678 | // contexts this is used as a statement which invokes the debugger as if a |
| 679 | // break point is present. |
| 680 | // DebuggerStatement :: |
| 681 | // 'debugger' ';' |
| 682 | |
| 683 | Expect(i::Token::DEBUGGER, CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 684 | ExpectSemicolon(ok); |
| 685 | return Statement::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 686 | } |
| 687 | |
| 688 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 689 | #undef CHECK_OK |
| 690 | #define CHECK_OK ok); \ |
| 691 | if (!*ok) return Expression::Default(); \ |
| 692 | ((void)0 |
| 693 | #define DUMMY ) // to make indentation work |
| 694 | #undef DUMMY |
| 695 | |
| 696 | |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 697 | // Precedence = 1 |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 698 | PreParser::Expression PreParser::ParseExpression(bool accept_IN, bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 699 | // Expression :: |
| 700 | // AssignmentExpression |
| 701 | // Expression ',' AssignmentExpression |
| 702 | |
| 703 | Expression result = ParseAssignmentExpression(accept_IN, CHECK_OK); |
| 704 | while (peek() == i::Token::COMMA) { |
| 705 | Expect(i::Token::COMMA, CHECK_OK); |
| 706 | ParseAssignmentExpression(accept_IN, CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 707 | result = Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 708 | } |
| 709 | return result; |
| 710 | } |
| 711 | |
| 712 | |
| 713 | // Precedence = 2 |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 714 | PreParser::Expression PreParser::ParseAssignmentExpression(bool accept_IN, |
| 715 | bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 716 | // AssignmentExpression :: |
| 717 | // ConditionalExpression |
| 718 | // LeftHandSideExpression AssignmentOperator AssignmentExpression |
| 719 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 720 | i::Scanner::Location before = scanner_->peek_location(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 721 | Expression expression = ParseConditionalExpression(accept_IN, CHECK_OK); |
| 722 | |
| 723 | if (!i::Token::IsAssignmentOp(peek())) { |
| 724 | // Parsed conditional expression only (no assignment). |
| 725 | return expression; |
| 726 | } |
| 727 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 728 | if (strict_mode() && expression.IsIdentifier() && |
| 729 | expression.AsIdentifier().IsEvalOrArguments()) { |
| 730 | i::Scanner::Location after = scanner_->location(); |
| 731 | ReportMessageAt(before.beg_pos, after.end_pos, |
| 732 | "strict_lhs_assignment", NULL); |
| 733 | *ok = false; |
| 734 | return Expression::Default(); |
| 735 | } |
| 736 | |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 737 | i::Token::Value op = Next(); // Get assignment operator. |
| 738 | ParseAssignmentExpression(accept_IN, CHECK_OK); |
| 739 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 740 | if ((op == i::Token::ASSIGN) && expression.IsThisProperty()) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 741 | scope_->AddProperty(); |
| 742 | } |
| 743 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 744 | return Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 745 | } |
| 746 | |
| 747 | |
| 748 | // Precedence = 3 |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 749 | PreParser::Expression PreParser::ParseConditionalExpression(bool accept_IN, |
| 750 | bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 751 | // ConditionalExpression :: |
| 752 | // LogicalOrExpression |
| 753 | // LogicalOrExpression '?' AssignmentExpression ':' AssignmentExpression |
| 754 | |
| 755 | // We start using the binary expression parser for prec >= 4 only! |
| 756 | Expression expression = ParseBinaryExpression(4, accept_IN, CHECK_OK); |
| 757 | if (peek() != i::Token::CONDITIONAL) return expression; |
| 758 | Consume(i::Token::CONDITIONAL); |
| 759 | // In parsing the first assignment expression in conditional |
| 760 | // expressions we always accept the 'in' keyword; see ECMA-262, |
| 761 | // section 11.12, page 58. |
| 762 | ParseAssignmentExpression(true, CHECK_OK); |
| 763 | Expect(i::Token::COLON, CHECK_OK); |
| 764 | ParseAssignmentExpression(accept_IN, CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 765 | return Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 766 | } |
| 767 | |
| 768 | |
| 769 | int PreParser::Precedence(i::Token::Value tok, bool accept_IN) { |
| 770 | if (tok == i::Token::IN && !accept_IN) |
| 771 | return 0; // 0 precedence will terminate binary expression parsing |
| 772 | |
| 773 | return i::Token::Precedence(tok); |
| 774 | } |
| 775 | |
| 776 | |
| 777 | // Precedence >= 4 |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 778 | PreParser::Expression PreParser::ParseBinaryExpression(int prec, |
| 779 | bool accept_IN, |
| 780 | bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 781 | Expression result = ParseUnaryExpression(CHECK_OK); |
| 782 | for (int prec1 = Precedence(peek(), accept_IN); prec1 >= prec; prec1--) { |
| 783 | // prec1 >= 4 |
| 784 | while (Precedence(peek(), accept_IN) == prec1) { |
| 785 | Next(); |
| 786 | ParseBinaryExpression(prec1 + 1, accept_IN, CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 787 | result = Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 788 | } |
| 789 | } |
| 790 | return result; |
| 791 | } |
| 792 | |
| 793 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 794 | PreParser::Expression PreParser::ParseUnaryExpression(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 795 | // UnaryExpression :: |
| 796 | // PostfixExpression |
| 797 | // 'delete' UnaryExpression |
| 798 | // 'void' UnaryExpression |
| 799 | // 'typeof' UnaryExpression |
| 800 | // '++' UnaryExpression |
| 801 | // '--' UnaryExpression |
| 802 | // '+' UnaryExpression |
| 803 | // '-' UnaryExpression |
| 804 | // '~' UnaryExpression |
| 805 | // '!' UnaryExpression |
| 806 | |
| 807 | i::Token::Value op = peek(); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 808 | if (i::Token::IsUnaryOp(op)) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 809 | op = Next(); |
| 810 | ParseUnaryExpression(ok); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 811 | return Expression::Default(); |
| 812 | } else if (i::Token::IsCountOp(op)) { |
| 813 | op = Next(); |
| 814 | i::Scanner::Location before = scanner_->peek_location(); |
| 815 | Expression expression = ParseUnaryExpression(CHECK_OK); |
| 816 | if (strict_mode() && expression.IsIdentifier() && |
| 817 | expression.AsIdentifier().IsEvalOrArguments()) { |
| 818 | i::Scanner::Location after = scanner_->location(); |
| 819 | ReportMessageAt(before.beg_pos, after.end_pos, |
| 820 | "strict_lhs_prefix", NULL); |
| 821 | *ok = false; |
| 822 | } |
| 823 | return Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 824 | } else { |
| 825 | return ParsePostfixExpression(ok); |
| 826 | } |
| 827 | } |
| 828 | |
| 829 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 830 | PreParser::Expression PreParser::ParsePostfixExpression(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 831 | // PostfixExpression :: |
| 832 | // LeftHandSideExpression ('++' | '--')? |
| 833 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 834 | i::Scanner::Location before = scanner_->peek_location(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 835 | Expression expression = ParseLeftHandSideExpression(CHECK_OK); |
whesse@chromium.org | df8c03c | 2011-06-21 14:36:03 +0000 | [diff] [blame] | 836 | if (!scanner_->HasAnyLineTerminatorBeforeNext() && |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 837 | i::Token::IsCountOp(peek())) { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 838 | if (strict_mode() && expression.IsIdentifier() && |
| 839 | expression.AsIdentifier().IsEvalOrArguments()) { |
| 840 | i::Scanner::Location after = scanner_->location(); |
| 841 | ReportMessageAt(before.beg_pos, after.end_pos, |
| 842 | "strict_lhs_postfix", NULL); |
| 843 | *ok = false; |
| 844 | return Expression::Default(); |
| 845 | } |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 846 | Next(); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 847 | return Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 848 | } |
| 849 | return expression; |
| 850 | } |
| 851 | |
| 852 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 853 | PreParser::Expression PreParser::ParseLeftHandSideExpression(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 854 | // LeftHandSideExpression :: |
| 855 | // (NewExpression | MemberExpression) ... |
| 856 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 857 | Expression result = Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 858 | if (peek() == i::Token::NEW) { |
| 859 | result = ParseNewExpression(CHECK_OK); |
| 860 | } else { |
| 861 | result = ParseMemberExpression(CHECK_OK); |
| 862 | } |
| 863 | |
| 864 | while (true) { |
| 865 | switch (peek()) { |
| 866 | case i::Token::LBRACK: { |
| 867 | Consume(i::Token::LBRACK); |
| 868 | ParseExpression(true, CHECK_OK); |
| 869 | Expect(i::Token::RBRACK, CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 870 | if (result.IsThis()) { |
| 871 | result = Expression::ThisProperty(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 872 | } else { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 873 | result = Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 874 | } |
| 875 | break; |
| 876 | } |
| 877 | |
| 878 | case i::Token::LPAREN: { |
| 879 | ParseArguments(CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 880 | result = Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 881 | break; |
| 882 | } |
| 883 | |
| 884 | case i::Token::PERIOD: { |
| 885 | Consume(i::Token::PERIOD); |
| 886 | ParseIdentifierName(CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 887 | if (result.IsThis()) { |
| 888 | result = Expression::ThisProperty(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 889 | } else { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 890 | result = Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 891 | } |
| 892 | break; |
| 893 | } |
| 894 | |
| 895 | default: |
| 896 | return result; |
| 897 | } |
| 898 | } |
| 899 | } |
| 900 | |
| 901 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 902 | PreParser::Expression PreParser::ParseNewExpression(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 903 | // NewExpression :: |
| 904 | // ('new')+ MemberExpression |
| 905 | |
| 906 | // The grammar for new expressions is pretty warped. The keyword |
| 907 | // 'new' can either be a part of the new expression (where it isn't |
| 908 | // followed by an argument list) or a part of the member expression, |
| 909 | // where it must be followed by an argument list. To accommodate |
| 910 | // this, we parse the 'new' keywords greedily and keep track of how |
| 911 | // many we have parsed. This information is then passed on to the |
| 912 | // member expression parser, which is only allowed to match argument |
| 913 | // lists as long as it has 'new' prefixes left |
| 914 | unsigned new_count = 0; |
| 915 | do { |
| 916 | Consume(i::Token::NEW); |
| 917 | new_count++; |
| 918 | } while (peek() == i::Token::NEW); |
| 919 | |
| 920 | return ParseMemberWithNewPrefixesExpression(new_count, ok); |
| 921 | } |
| 922 | |
| 923 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 924 | PreParser::Expression PreParser::ParseMemberExpression(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 925 | return ParseMemberWithNewPrefixesExpression(0, ok); |
| 926 | } |
| 927 | |
| 928 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 929 | PreParser::Expression PreParser::ParseMemberWithNewPrefixesExpression( |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 930 | unsigned new_count, bool* ok) { |
| 931 | // MemberExpression :: |
| 932 | // (PrimaryExpression | FunctionLiteral) |
| 933 | // ('[' Expression ']' | '.' Identifier | Arguments)* |
| 934 | |
| 935 | // Parse the initial primary or function expression. |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 936 | Expression result = Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 937 | if (peek() == i::Token::FUNCTION) { |
| 938 | Consume(i::Token::FUNCTION); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 939 | Identifier identifier = Identifier::Default(); |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 940 | if (peek_any_identifier()) { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 941 | identifier = ParseIdentifier(CHECK_OK); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 942 | } |
| 943 | result = ParseFunctionLiteral(CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 944 | if (result.IsStrictFunction() && !identifier.IsValidStrictVariable()) { |
| 945 | StrictModeIdentifierViolation(scanner_->location(), |
| 946 | "strict_function_name", |
| 947 | identifier, |
| 948 | ok); |
| 949 | return Expression::Default(); |
| 950 | } |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 951 | } else { |
| 952 | result = ParsePrimaryExpression(CHECK_OK); |
| 953 | } |
| 954 | |
| 955 | while (true) { |
| 956 | switch (peek()) { |
| 957 | case i::Token::LBRACK: { |
| 958 | Consume(i::Token::LBRACK); |
| 959 | ParseExpression(true, CHECK_OK); |
| 960 | Expect(i::Token::RBRACK, CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 961 | if (result.IsThis()) { |
| 962 | result = Expression::ThisProperty(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 963 | } else { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 964 | result = Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 965 | } |
| 966 | break; |
| 967 | } |
| 968 | case i::Token::PERIOD: { |
| 969 | Consume(i::Token::PERIOD); |
| 970 | ParseIdentifierName(CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 971 | if (result.IsThis()) { |
| 972 | result = Expression::ThisProperty(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 973 | } else { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 974 | result = Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 975 | } |
| 976 | break; |
| 977 | } |
| 978 | case i::Token::LPAREN: { |
| 979 | if (new_count == 0) return result; |
| 980 | // Consume one of the new prefixes (already parsed). |
| 981 | ParseArguments(CHECK_OK); |
| 982 | new_count--; |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 983 | result = Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 984 | break; |
| 985 | } |
| 986 | default: |
| 987 | return result; |
| 988 | } |
| 989 | } |
| 990 | } |
| 991 | |
| 992 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 993 | PreParser::Expression PreParser::ParsePrimaryExpression(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 994 | // PrimaryExpression :: |
| 995 | // 'this' |
| 996 | // 'null' |
| 997 | // 'true' |
| 998 | // 'false' |
| 999 | // Identifier |
| 1000 | // Number |
| 1001 | // String |
| 1002 | // ArrayLiteral |
| 1003 | // ObjectLiteral |
| 1004 | // RegExpLiteral |
| 1005 | // '(' Expression ')' |
| 1006 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1007 | Expression result = Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1008 | switch (peek()) { |
| 1009 | case i::Token::THIS: { |
| 1010 | Next(); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1011 | result = Expression::This(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1012 | break; |
| 1013 | } |
| 1014 | |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 1015 | case i::Token::FUTURE_RESERVED_WORD: { |
| 1016 | Next(); |
| 1017 | i::Scanner::Location location = scanner_->location(); |
| 1018 | ReportMessageAt(location.beg_pos, location.end_pos, |
| 1019 | "reserved_word", NULL); |
| 1020 | *ok = false; |
| 1021 | return Expression::Default(); |
| 1022 | } |
| 1023 | |
| 1024 | case i::Token::FUTURE_STRICT_RESERVED_WORD: |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1025 | if (strict_mode()) { |
| 1026 | Next(); |
| 1027 | i::Scanner::Location location = scanner_->location(); |
| 1028 | ReportMessageAt(location.beg_pos, location.end_pos, |
| 1029 | "strict_reserved_word", NULL); |
| 1030 | *ok = false; |
| 1031 | return Expression::Default(); |
| 1032 | } |
| 1033 | // FALLTHROUGH |
| 1034 | case i::Token::IDENTIFIER: { |
| 1035 | Identifier id = ParseIdentifier(CHECK_OK); |
| 1036 | result = Expression::FromIdentifier(id); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1037 | break; |
| 1038 | } |
| 1039 | |
| 1040 | case i::Token::NULL_LITERAL: |
| 1041 | case i::Token::TRUE_LITERAL: |
| 1042 | case i::Token::FALSE_LITERAL: |
| 1043 | case i::Token::NUMBER: { |
| 1044 | Next(); |
| 1045 | break; |
| 1046 | } |
| 1047 | case i::Token::STRING: { |
| 1048 | Next(); |
| 1049 | result = GetStringSymbol(); |
| 1050 | break; |
| 1051 | } |
| 1052 | |
| 1053 | case i::Token::ASSIGN_DIV: |
| 1054 | result = ParseRegExpLiteral(true, CHECK_OK); |
| 1055 | break; |
| 1056 | |
| 1057 | case i::Token::DIV: |
| 1058 | result = ParseRegExpLiteral(false, CHECK_OK); |
| 1059 | break; |
| 1060 | |
| 1061 | case i::Token::LBRACK: |
| 1062 | result = ParseArrayLiteral(CHECK_OK); |
| 1063 | break; |
| 1064 | |
| 1065 | case i::Token::LBRACE: |
| 1066 | result = ParseObjectLiteral(CHECK_OK); |
| 1067 | break; |
| 1068 | |
| 1069 | case i::Token::LPAREN: |
| 1070 | Consume(i::Token::LPAREN); |
sgjesse@chromium.org | c6c5718 | 2011-01-17 12:24:25 +0000 | [diff] [blame] | 1071 | parenthesized_function_ = (peek() == i::Token::FUNCTION); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1072 | result = ParseExpression(true, CHECK_OK); |
| 1073 | Expect(i::Token::RPAREN, CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1074 | result = result.Parenthesize(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1075 | break; |
| 1076 | |
| 1077 | case i::Token::MOD: |
| 1078 | result = ParseV8Intrinsic(CHECK_OK); |
| 1079 | break; |
| 1080 | |
| 1081 | default: { |
| 1082 | Next(); |
| 1083 | *ok = false; |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1084 | return Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1085 | } |
| 1086 | } |
| 1087 | |
| 1088 | return result; |
| 1089 | } |
| 1090 | |
| 1091 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1092 | PreParser::Expression PreParser::ParseArrayLiteral(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1093 | // ArrayLiteral :: |
| 1094 | // '[' Expression? (',' Expression?)* ']' |
| 1095 | Expect(i::Token::LBRACK, CHECK_OK); |
| 1096 | while (peek() != i::Token::RBRACK) { |
| 1097 | if (peek() != i::Token::COMMA) { |
| 1098 | ParseAssignmentExpression(true, CHECK_OK); |
| 1099 | } |
| 1100 | if (peek() != i::Token::RBRACK) { |
| 1101 | Expect(i::Token::COMMA, CHECK_OK); |
| 1102 | } |
| 1103 | } |
| 1104 | Expect(i::Token::RBRACK, CHECK_OK); |
| 1105 | |
| 1106 | scope_->NextMaterializedLiteralIndex(); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1107 | return Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1108 | } |
| 1109 | |
| 1110 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1111 | PreParser::Expression PreParser::ParseObjectLiteral(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1112 | // ObjectLiteral :: |
| 1113 | // '{' ( |
| 1114 | // ((IdentifierName | String | Number) ':' AssignmentExpression) |
| 1115 | // | (('get' | 'set') (IdentifierName | String | Number) FunctionLiteral) |
| 1116 | // )*[','] '}' |
| 1117 | |
| 1118 | Expect(i::Token::LBRACE, CHECK_OK); |
| 1119 | while (peek() != i::Token::RBRACE) { |
| 1120 | i::Token::Value next = peek(); |
| 1121 | switch (next) { |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 1122 | case i::Token::IDENTIFIER: |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 1123 | case i::Token::FUTURE_RESERVED_WORD: |
| 1124 | case i::Token::FUTURE_STRICT_RESERVED_WORD: { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1125 | bool is_getter = false; |
| 1126 | bool is_setter = false; |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 1127 | ParseIdentifierNameOrGetOrSet(&is_getter, &is_setter, CHECK_OK); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1128 | if ((is_getter || is_setter) && peek() != i::Token::COLON) { |
| 1129 | i::Token::Value name = Next(); |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 1130 | bool is_keyword = i::Token::IsKeyword(name); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1131 | if (name != i::Token::IDENTIFIER && |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 1132 | name != i::Token::FUTURE_RESERVED_WORD && |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 1133 | name != i::Token::FUTURE_STRICT_RESERVED_WORD && |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1134 | name != i::Token::NUMBER && |
| 1135 | name != i::Token::STRING && |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 1136 | !is_keyword) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 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 | } |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 1140 | if (!is_keyword) { |
| 1141 | LogSymbol(); |
| 1142 | } |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1143 | ParseFunctionLiteral(CHECK_OK); |
| 1144 | if (peek() != i::Token::RBRACE) { |
| 1145 | Expect(i::Token::COMMA, CHECK_OK); |
| 1146 | } |
| 1147 | continue; // restart the while |
| 1148 | } |
| 1149 | break; |
| 1150 | } |
| 1151 | case i::Token::STRING: |
| 1152 | Consume(next); |
| 1153 | GetStringSymbol(); |
| 1154 | break; |
| 1155 | case i::Token::NUMBER: |
| 1156 | Consume(next); |
| 1157 | break; |
| 1158 | default: |
| 1159 | if (i::Token::IsKeyword(next)) { |
| 1160 | Consume(next); |
| 1161 | } else { |
| 1162 | // Unexpected token. |
| 1163 | *ok = false; |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1164 | return Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1165 | } |
| 1166 | } |
| 1167 | |
| 1168 | Expect(i::Token::COLON, CHECK_OK); |
| 1169 | ParseAssignmentExpression(true, CHECK_OK); |
| 1170 | |
| 1171 | // TODO(1240767): Consider allowing trailing comma. |
| 1172 | if (peek() != i::Token::RBRACE) Expect(i::Token::COMMA, CHECK_OK); |
| 1173 | } |
| 1174 | Expect(i::Token::RBRACE, CHECK_OK); |
| 1175 | |
| 1176 | scope_->NextMaterializedLiteralIndex(); |
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::Expression PreParser::ParseRegExpLiteral(bool seen_equal, |
| 1182 | bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1183 | if (!scanner_->ScanRegExpPattern(seen_equal)) { |
| 1184 | Next(); |
| 1185 | i::JavaScriptScanner::Location location = scanner_->location(); |
| 1186 | ReportMessageAt(location.beg_pos, location.end_pos, |
| 1187 | "unterminated_regexp", NULL); |
| 1188 | *ok = false; |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1189 | return Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1190 | } |
| 1191 | |
| 1192 | scope_->NextMaterializedLiteralIndex(); |
| 1193 | |
| 1194 | if (!scanner_->ScanRegExpFlags()) { |
| 1195 | Next(); |
| 1196 | i::JavaScriptScanner::Location location = scanner_->location(); |
| 1197 | ReportMessageAt(location.beg_pos, location.end_pos, |
| 1198 | "invalid_regexp_flags", NULL); |
| 1199 | *ok = false; |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1200 | return Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1201 | } |
| 1202 | Next(); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1203 | return Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1204 | } |
| 1205 | |
| 1206 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1207 | PreParser::Arguments PreParser::ParseArguments(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1208 | // Arguments :: |
| 1209 | // '(' (AssignmentExpression)*[','] ')' |
| 1210 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1211 | Expect(i::Token::LPAREN, ok); |
| 1212 | if (!*ok) return -1; |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1213 | bool done = (peek() == i::Token::RPAREN); |
| 1214 | int argc = 0; |
| 1215 | while (!done) { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1216 | ParseAssignmentExpression(true, ok); |
| 1217 | if (!*ok) return -1; |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1218 | argc++; |
| 1219 | done = (peek() == i::Token::RPAREN); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1220 | if (!done) { |
| 1221 | Expect(i::Token::COMMA, ok); |
| 1222 | if (!*ok) return -1; |
| 1223 | } |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1224 | } |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1225 | Expect(i::Token::RPAREN, ok); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1226 | return argc; |
| 1227 | } |
| 1228 | |
| 1229 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1230 | PreParser::Expression PreParser::ParseFunctionLiteral(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1231 | // Function :: |
| 1232 | // '(' FormalParameterList? ')' '{' FunctionBody '}' |
| 1233 | |
| 1234 | // Parse function body. |
| 1235 | ScopeType outer_scope_type = scope_->type(); |
| 1236 | bool inside_with = scope_->IsInsideWith(); |
| 1237 | Scope function_scope(&scope_, kFunctionScope); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1238 | // FormalParameterList :: |
| 1239 | // '(' (Identifier)*[','] ')' |
| 1240 | Expect(i::Token::LPAREN, CHECK_OK); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 1241 | int start_position = scanner_->location().beg_pos; |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1242 | bool done = (peek() == i::Token::RPAREN); |
| 1243 | while (!done) { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1244 | Identifier id = ParseIdentifier(CHECK_OK); |
| 1245 | if (!id.IsValidStrictVariable()) { |
| 1246 | StrictModeIdentifierViolation(scanner_->location(), |
| 1247 | "strict_param_name", |
| 1248 | id, |
| 1249 | CHECK_OK); |
| 1250 | } |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1251 | done = (peek() == i::Token::RPAREN); |
| 1252 | if (!done) { |
| 1253 | Expect(i::Token::COMMA, CHECK_OK); |
| 1254 | } |
| 1255 | } |
| 1256 | Expect(i::Token::RPAREN, CHECK_OK); |
| 1257 | |
| 1258 | Expect(i::Token::LBRACE, CHECK_OK); |
| 1259 | int function_block_pos = scanner_->location().beg_pos; |
| 1260 | |
| 1261 | // Determine if the function will be lazily compiled. |
| 1262 | // Currently only happens to top-level functions. |
| 1263 | // Optimistically assume that all top-level functions are lazily compiled. |
sgjesse@chromium.org | c6c5718 | 2011-01-17 12:24:25 +0000 | [diff] [blame] | 1264 | bool is_lazily_compiled = (outer_scope_type == kTopLevelScope && |
| 1265 | !inside_with && allow_lazy_ && |
| 1266 | !parenthesized_function_); |
| 1267 | parenthesized_function_ = false; |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1268 | |
| 1269 | if (is_lazily_compiled) { |
| 1270 | log_->PauseRecording(); |
| 1271 | ParseSourceElements(i::Token::RBRACE, ok); |
| 1272 | log_->ResumeRecording(); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1273 | if (!*ok) Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1274 | |
| 1275 | Expect(i::Token::RBRACE, CHECK_OK); |
| 1276 | |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 1277 | // Position right after terminal '}'. |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1278 | int end_pos = scanner_->location().end_pos; |
| 1279 | log_->LogFunction(function_block_pos, end_pos, |
| 1280 | function_scope.materialized_literal_count(), |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 1281 | function_scope.expected_properties(), |
| 1282 | strict_mode() ? 1 : 0); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1283 | } else { |
| 1284 | ParseSourceElements(i::Token::RBRACE, CHECK_OK); |
| 1285 | Expect(i::Token::RBRACE, CHECK_OK); |
| 1286 | } |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 1287 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1288 | if (strict_mode()) { |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 1289 | int end_position = scanner_->location().end_pos; |
| 1290 | CheckOctalLiteral(start_position, end_position, CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1291 | CheckDelayedStrictModeViolation(start_position, end_position, CHECK_OK); |
| 1292 | return Expression::StrictFunction(); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 1293 | } |
| 1294 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1295 | return Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1296 | } |
| 1297 | |
| 1298 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1299 | PreParser::Expression PreParser::ParseV8Intrinsic(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1300 | // CallRuntime :: |
| 1301 | // '%' Identifier Arguments |
| 1302 | |
| 1303 | Expect(i::Token::MOD, CHECK_OK); |
| 1304 | ParseIdentifier(CHECK_OK); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1305 | ParseArguments(ok); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1306 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1307 | return Expression::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1308 | } |
| 1309 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1310 | #undef CHECK_OK |
| 1311 | |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1312 | |
| 1313 | void PreParser::ExpectSemicolon(bool* ok) { |
| 1314 | // Check for automatic semicolon insertion according to |
| 1315 | // the rules given in ECMA-262, section 7.9, page 21. |
| 1316 | i::Token::Value tok = peek(); |
| 1317 | if (tok == i::Token::SEMICOLON) { |
| 1318 | Next(); |
| 1319 | return; |
| 1320 | } |
whesse@chromium.org | df8c03c | 2011-06-21 14:36:03 +0000 | [diff] [blame] | 1321 | if (scanner_->HasAnyLineTerminatorBeforeNext() || |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1322 | tok == i::Token::RBRACE || |
| 1323 | tok == i::Token::EOS) { |
| 1324 | return; |
| 1325 | } |
| 1326 | Expect(i::Token::SEMICOLON, ok); |
| 1327 | } |
| 1328 | |
| 1329 | |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 1330 | void PreParser::LogSymbol() { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1331 | int identifier_pos = scanner_->location().beg_pos; |
fschneider@chromium.org | 9e3e0b6 | 2011-01-03 10:16:46 +0000 | [diff] [blame] | 1332 | if (scanner_->is_literal_ascii()) { |
| 1333 | log_->LogAsciiSymbol(identifier_pos, scanner_->literal_ascii_string()); |
| 1334 | } else { |
| 1335 | log_->LogUC16Symbol(identifier_pos, scanner_->literal_uc16_string()); |
| 1336 | } |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 1337 | } |
| 1338 | |
| 1339 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1340 | PreParser::Expression PreParser::GetStringSymbol() { |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 1341 | const int kUseStrictLength = 10; |
| 1342 | const char* kUseStrictChars = "use strict"; |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 1343 | LogSymbol(); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 1344 | if (scanner_->is_literal_ascii() && |
| 1345 | scanner_->literal_length() == kUseStrictLength && |
| 1346 | !scanner_->literal_contains_escapes() && |
| 1347 | !strncmp(scanner_->literal_ascii_string().start(), kUseStrictChars, |
| 1348 | kUseStrictLength)) { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1349 | return Expression::UseStrictStringLiteral(); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 1350 | } |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1351 | return Expression::StringLiteral(); |
| 1352 | } |
| 1353 | |
| 1354 | |
| 1355 | PreParser::Identifier PreParser::GetIdentifierSymbol() { |
| 1356 | LogSymbol(); |
| 1357 | if (scanner_->current_token() == i::Token::FUTURE_RESERVED_WORD) { |
| 1358 | return Identifier::FutureReserved(); |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 1359 | } else if (scanner_->current_token() == |
| 1360 | i::Token::FUTURE_STRICT_RESERVED_WORD) { |
| 1361 | return Identifier::FutureStrictReserved(); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1362 | } |
| 1363 | if (scanner_->is_literal_ascii()) { |
| 1364 | // Detect strict-mode poison words. |
| 1365 | if (scanner_->literal_length() == 4 && |
| 1366 | !strncmp(scanner_->literal_ascii_string().start(), "eval", 4)) { |
| 1367 | return Identifier::Eval(); |
| 1368 | } |
| 1369 | if (scanner_->literal_length() == 9 && |
| 1370 | !strncmp(scanner_->literal_ascii_string().start(), "arguments", 9)) { |
| 1371 | return Identifier::Arguments(); |
| 1372 | } |
| 1373 | } |
| 1374 | return Identifier::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1375 | } |
| 1376 | |
| 1377 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1378 | PreParser::Identifier PreParser::ParseIdentifier(bool* ok) { |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 1379 | i::Token::Value next = Next(); |
| 1380 | switch (next) { |
| 1381 | case i::Token::FUTURE_RESERVED_WORD: { |
| 1382 | i::Scanner::Location location = scanner_->location(); |
| 1383 | ReportMessageAt(location.beg_pos, location.end_pos, |
| 1384 | "reserved_word", NULL); |
| 1385 | *ok = false; |
| 1386 | } |
| 1387 | // FALLTHROUGH |
| 1388 | case i::Token::FUTURE_STRICT_RESERVED_WORD: |
| 1389 | case i::Token::IDENTIFIER: |
| 1390 | return GetIdentifierSymbol(); |
| 1391 | default: |
| 1392 | *ok = false; |
| 1393 | return Identifier::Default(); |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 1394 | } |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1395 | } |
| 1396 | |
| 1397 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1398 | void PreParser::SetStrictModeViolation(i::Scanner::Location location, |
| 1399 | const char* type, |
| 1400 | bool* ok) { |
| 1401 | if (strict_mode()) { |
| 1402 | ReportMessageAt(location.beg_pos, location.end_pos, type, NULL); |
| 1403 | *ok = false; |
| 1404 | return; |
| 1405 | } |
| 1406 | // Delay report in case this later turns out to be strict code |
| 1407 | // (i.e., for function names and parameters prior to a "use strict" |
| 1408 | // directive). |
| 1409 | strict_mode_violation_location_ = location; |
| 1410 | strict_mode_violation_type_ = type; |
| 1411 | } |
| 1412 | |
| 1413 | |
| 1414 | void PreParser::CheckDelayedStrictModeViolation(int beg_pos, |
| 1415 | int end_pos, |
| 1416 | bool* ok) { |
| 1417 | i::Scanner::Location location = strict_mode_violation_location_; |
| 1418 | if (location.IsValid() && |
| 1419 | location.beg_pos > beg_pos && location.end_pos < end_pos) { |
| 1420 | ReportMessageAt(location.beg_pos, location.end_pos, |
| 1421 | strict_mode_violation_type_, NULL); |
| 1422 | *ok = false; |
| 1423 | } |
| 1424 | strict_mode_violation_location_ = i::Scanner::Location::invalid(); |
| 1425 | } |
| 1426 | |
| 1427 | |
| 1428 | void PreParser::StrictModeIdentifierViolation(i::Scanner::Location location, |
| 1429 | const char* eval_args_type, |
| 1430 | Identifier identifier, |
| 1431 | bool* ok) { |
| 1432 | const char* type = eval_args_type; |
| 1433 | if (identifier.IsFutureReserved()) { |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 1434 | type = "reserved_word"; |
| 1435 | } else if (identifier.IsFutureStrictReserved()) { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1436 | type = "strict_reserved_word"; |
| 1437 | } |
| 1438 | if (strict_mode()) { |
| 1439 | ReportMessageAt(location.beg_pos, location.end_pos, type, NULL); |
| 1440 | *ok = false; |
| 1441 | return; |
| 1442 | } |
| 1443 | strict_mode_violation_location_ = location; |
| 1444 | strict_mode_violation_type_ = type; |
| 1445 | } |
| 1446 | |
| 1447 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1448 | PreParser::Identifier PreParser::ParseIdentifierName(bool* ok) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1449 | i::Token::Value next = Next(); |
| 1450 | if (i::Token::IsKeyword(next)) { |
| 1451 | int pos = scanner_->location().beg_pos; |
| 1452 | const char* keyword = i::Token::String(next); |
fschneider@chromium.org | 9e3e0b6 | 2011-01-03 10:16:46 +0000 | [diff] [blame] | 1453 | log_->LogAsciiSymbol(pos, i::Vector<const char>(keyword, |
| 1454 | i::StrLength(keyword))); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1455 | return Identifier::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1456 | } |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 1457 | if (next == i::Token::IDENTIFIER || |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 1458 | next == i::Token::FUTURE_RESERVED_WORD || |
| 1459 | next == i::Token::FUTURE_STRICT_RESERVED_WORD) { |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1460 | return GetIdentifierSymbol(); |
| 1461 | } |
| 1462 | *ok = false; |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1463 | return Identifier::Default(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1464 | } |
| 1465 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1466 | #undef CHECK_OK |
| 1467 | |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1468 | |
| 1469 | // This function reads an identifier and determines whether or not it |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 1470 | // is 'get' or 'set'. |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 1471 | PreParser::Identifier PreParser::ParseIdentifierNameOrGetOrSet(bool* is_get, |
| 1472 | bool* is_set, |
| 1473 | bool* ok) { |
| 1474 | Identifier result = ParseIdentifierName(ok); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1475 | if (!*ok) return Identifier::Default(); |
| 1476 | if (scanner_->is_literal_ascii() && |
| 1477 | scanner_->literal_length() == 3) { |
fschneider@chromium.org | 9e3e0b6 | 2011-01-03 10:16:46 +0000 | [diff] [blame] | 1478 | const char* token = scanner_->literal_ascii_string().start(); |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1479 | *is_get = strncmp(token, "get", 3) == 0; |
| 1480 | *is_set = !*is_get && strncmp(token, "set", 3) == 0; |
| 1481 | } |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 1482 | return result; |
| 1483 | } |
| 1484 | |
| 1485 | bool PreParser::peek_any_identifier() { |
| 1486 | i::Token::Value next = peek(); |
| 1487 | return next == i::Token::IDENTIFIER || |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 1488 | next == i::Token::FUTURE_RESERVED_WORD || |
| 1489 | next == i::Token::FUTURE_STRICT_RESERVED_WORD; |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1490 | } |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1491 | } } // v8::preparser |