Mon, 01 Jul 2013 12:38:01 +0530
8019473: Parser issues related to functions and blocks
Reviewed-by: lagergren
jlaskey@3 | 1 | /* |
jlaskey@7 | 2 | * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. |
jlaskey@3 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
jlaskey@3 | 4 | * |
jlaskey@3 | 5 | * This code is free software; you can redistribute it and/or modify it |
jlaskey@3 | 6 | * under the terms of the GNU General Public License version 2 only, as |
jlaskey@3 | 7 | * published by the Free Software Foundation. Oracle designates this |
jlaskey@3 | 8 | * particular file as subject to the "Classpath" exception as provided |
jlaskey@3 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
jlaskey@3 | 10 | * |
jlaskey@3 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
jlaskey@3 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
jlaskey@3 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
jlaskey@3 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
jlaskey@3 | 15 | * accompanied this code). |
jlaskey@3 | 16 | * |
jlaskey@3 | 17 | * You should have received a copy of the GNU General Public License version |
jlaskey@3 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
jlaskey@3 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
jlaskey@3 | 20 | * |
jlaskey@3 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
jlaskey@3 | 22 | * or visit www.oracle.com if you need additional information or have any |
jlaskey@3 | 23 | * questions. |
jlaskey@3 | 24 | */ |
jlaskey@3 | 25 | |
jlaskey@3 | 26 | package jdk.nashorn.internal.parser; |
jlaskey@3 | 27 | |
jlaskey@3 | 28 | import static jdk.nashorn.internal.codegen.CompilerConstants.ARGUMENTS; |
jlaskey@3 | 29 | import static jdk.nashorn.internal.codegen.CompilerConstants.EVAL; |
jlaskey@3 | 30 | import static jdk.nashorn.internal.codegen.CompilerConstants.FUNCTION_PREFIX; |
jlaskey@3 | 31 | import static jdk.nashorn.internal.codegen.CompilerConstants.RUN_SCRIPT; |
jlaskey@3 | 32 | import static jdk.nashorn.internal.parser.TokenType.ASSIGN; |
jlaskey@3 | 33 | import static jdk.nashorn.internal.parser.TokenType.CASE; |
jlaskey@3 | 34 | import static jdk.nashorn.internal.parser.TokenType.CATCH; |
jlaskey@3 | 35 | import static jdk.nashorn.internal.parser.TokenType.COLON; |
jlaskey@3 | 36 | import static jdk.nashorn.internal.parser.TokenType.COMMARIGHT; |
jlaskey@3 | 37 | import static jdk.nashorn.internal.parser.TokenType.DECPOSTFIX; |
jlaskey@3 | 38 | import static jdk.nashorn.internal.parser.TokenType.DECPREFIX; |
jlaskey@3 | 39 | import static jdk.nashorn.internal.parser.TokenType.ELSE; |
jlaskey@3 | 40 | import static jdk.nashorn.internal.parser.TokenType.EOF; |
jlaskey@3 | 41 | import static jdk.nashorn.internal.parser.TokenType.EOL; |
jlaskey@3 | 42 | import static jdk.nashorn.internal.parser.TokenType.FINALLY; |
jlaskey@3 | 43 | import static jdk.nashorn.internal.parser.TokenType.FUNCTION; |
jlaskey@3 | 44 | import static jdk.nashorn.internal.parser.TokenType.IDENT; |
jlaskey@3 | 45 | import static jdk.nashorn.internal.parser.TokenType.IF; |
jlaskey@3 | 46 | import static jdk.nashorn.internal.parser.TokenType.INCPOSTFIX; |
jlaskey@3 | 47 | import static jdk.nashorn.internal.parser.TokenType.LBRACE; |
jlaskey@3 | 48 | import static jdk.nashorn.internal.parser.TokenType.LPAREN; |
jlaskey@3 | 49 | import static jdk.nashorn.internal.parser.TokenType.RBRACE; |
jlaskey@3 | 50 | import static jdk.nashorn.internal.parser.TokenType.RBRACKET; |
jlaskey@3 | 51 | import static jdk.nashorn.internal.parser.TokenType.RPAREN; |
jlaskey@3 | 52 | import static jdk.nashorn.internal.parser.TokenType.SEMICOLON; |
jlaskey@3 | 53 | import static jdk.nashorn.internal.parser.TokenType.TERNARY; |
jlaskey@3 | 54 | import static jdk.nashorn.internal.parser.TokenType.WHILE; |
jlaskey@3 | 55 | |
jlaskey@3 | 56 | import java.util.ArrayList; |
jlaskey@3 | 57 | import java.util.HashSet; |
attila@144 | 58 | import java.util.Iterator; |
lagergren@211 | 59 | import java.util.LinkedHashMap; |
jlaskey@3 | 60 | import java.util.List; |
jlaskey@3 | 61 | import java.util.Map; |
lagergren@89 | 62 | import jdk.nashorn.internal.codegen.CompilerConstants; |
lagergren@89 | 63 | import jdk.nashorn.internal.codegen.Namespace; |
jlaskey@3 | 64 | import jdk.nashorn.internal.ir.AccessNode; |
lagergren@253 | 65 | import jdk.nashorn.internal.ir.BaseNode; |
jlaskey@3 | 66 | import jdk.nashorn.internal.ir.BinaryNode; |
jlaskey@3 | 67 | import jdk.nashorn.internal.ir.Block; |
lagergren@211 | 68 | import jdk.nashorn.internal.ir.BlockLexicalContext; |
jlaskey@3 | 69 | import jdk.nashorn.internal.ir.BreakNode; |
jlaskey@3 | 70 | import jdk.nashorn.internal.ir.BreakableNode; |
jlaskey@3 | 71 | import jdk.nashorn.internal.ir.CallNode; |
jlaskey@3 | 72 | import jdk.nashorn.internal.ir.CaseNode; |
jlaskey@3 | 73 | import jdk.nashorn.internal.ir.CatchNode; |
jlaskey@3 | 74 | import jdk.nashorn.internal.ir.ContinueNode; |
jlaskey@3 | 75 | import jdk.nashorn.internal.ir.EmptyNode; |
jlaskey@3 | 76 | import jdk.nashorn.internal.ir.ExecuteNode; |
jlaskey@3 | 77 | import jdk.nashorn.internal.ir.ForNode; |
jlaskey@3 | 78 | import jdk.nashorn.internal.ir.FunctionNode; |
attila@144 | 79 | import jdk.nashorn.internal.ir.FunctionNode.CompilationState; |
jlaskey@3 | 80 | import jdk.nashorn.internal.ir.IdentNode; |
jlaskey@3 | 81 | import jdk.nashorn.internal.ir.IfNode; |
jlaskey@3 | 82 | import jdk.nashorn.internal.ir.IndexNode; |
jlaskey@3 | 83 | import jdk.nashorn.internal.ir.LabelNode; |
attila@144 | 84 | import jdk.nashorn.internal.ir.LexicalContext; |
jlaskey@3 | 85 | import jdk.nashorn.internal.ir.LiteralNode; |
lagergren@211 | 86 | import jdk.nashorn.internal.ir.LoopNode; |
jlaskey@3 | 87 | import jdk.nashorn.internal.ir.Node; |
jlaskey@3 | 88 | import jdk.nashorn.internal.ir.ObjectNode; |
jlaskey@3 | 89 | import jdk.nashorn.internal.ir.PropertyKey; |
jlaskey@3 | 90 | import jdk.nashorn.internal.ir.PropertyNode; |
jlaskey@3 | 91 | import jdk.nashorn.internal.ir.ReturnNode; |
jlaskey@3 | 92 | import jdk.nashorn.internal.ir.RuntimeNode; |
lagergren@253 | 93 | import jdk.nashorn.internal.ir.Statement; |
jlaskey@3 | 94 | import jdk.nashorn.internal.ir.SwitchNode; |
jlaskey@3 | 95 | import jdk.nashorn.internal.ir.TernaryNode; |
jlaskey@3 | 96 | import jdk.nashorn.internal.ir.ThrowNode; |
jlaskey@3 | 97 | import jdk.nashorn.internal.ir.TryNode; |
jlaskey@3 | 98 | import jdk.nashorn.internal.ir.UnaryNode; |
jlaskey@3 | 99 | import jdk.nashorn.internal.ir.VarNode; |
jlaskey@3 | 100 | import jdk.nashorn.internal.ir.WhileNode; |
jlaskey@3 | 101 | import jdk.nashorn.internal.ir.WithNode; |
lagergren@108 | 102 | import jdk.nashorn.internal.runtime.DebugLogger; |
lagergren@89 | 103 | import jdk.nashorn.internal.runtime.ErrorManager; |
jlaskey@3 | 104 | import jdk.nashorn.internal.runtime.JSErrorType; |
jlaskey@3 | 105 | import jdk.nashorn.internal.runtime.ParserException; |
sundar@118 | 106 | import jdk.nashorn.internal.runtime.ScriptEnvironment; |
attila@101 | 107 | import jdk.nashorn.internal.runtime.ScriptingFunctions; |
lagergren@89 | 108 | import jdk.nashorn.internal.runtime.Source; |
lagergren@108 | 109 | import jdk.nashorn.internal.runtime.Timing; |
jlaskey@3 | 110 | |
jlaskey@3 | 111 | /** |
jlaskey@3 | 112 | * Builds the IR. |
jlaskey@3 | 113 | */ |
jlaskey@3 | 114 | public class Parser extends AbstractParser { |
sundar@118 | 115 | /** Current script environment. */ |
sundar@118 | 116 | private final ScriptEnvironment env; |
jlaskey@3 | 117 | |
jlaskey@67 | 118 | /** Is scripting mode. */ |
jlaskey@67 | 119 | private final boolean scripting; |
jlaskey@67 | 120 | |
lagergren@253 | 121 | private List<Statement> functionDeclarations; |
jlaskey@3 | 122 | |
lagergren@211 | 123 | private final BlockLexicalContext lc = new BlockLexicalContext(); |
lagergren@211 | 124 | |
lagergren@89 | 125 | /** Namespace for function names where not explicitly given */ |
lagergren@89 | 126 | private final Namespace namespace; |
lagergren@89 | 127 | |
lagergren@139 | 128 | private static final DebugLogger LOG = new DebugLogger("parser"); |
lagergren@108 | 129 | |
lagergren@89 | 130 | /** |
lagergren@89 | 131 | * Constructor |
lagergren@89 | 132 | * |
sundar@118 | 133 | * @param env script environment |
lagergren@89 | 134 | * @param source source to parse |
lagergren@89 | 135 | * @param errors error manager |
lagergren@89 | 136 | */ |
sundar@118 | 137 | public Parser(final ScriptEnvironment env, final Source source, final ErrorManager errors) { |
sundar@118 | 138 | this(env, source, errors, env._strict); |
lagergren@89 | 139 | } |
lagergren@89 | 140 | |
jlaskey@3 | 141 | /** |
jlaskey@3 | 142 | * Construct a parser. |
lagergren@89 | 143 | * |
sundar@118 | 144 | * @param env script environment |
lagergren@89 | 145 | * @param source source to parse |
lagergren@89 | 146 | * @param errors error manager |
lagergren@89 | 147 | * @param strict parser created with strict mode enabled. |
jlaskey@3 | 148 | */ |
sundar@118 | 149 | public Parser(final ScriptEnvironment env, final Source source, final ErrorManager errors, final boolean strict) { |
lagergren@89 | 150 | super(source, errors, strict); |
lagergren@211 | 151 | this.env = env; |
sundar@118 | 152 | this.namespace = new Namespace(env.getNamespace()); |
sundar@118 | 153 | this.scripting = env._scripting; |
jlaskey@3 | 154 | } |
jlaskey@3 | 155 | |
jlaskey@3 | 156 | /** |
lagergren@89 | 157 | * Execute parse and return the resulting function node. |
lagergren@89 | 158 | * Errors will be thrown and the error manager will contain information |
lagergren@89 | 159 | * if parsing should fail |
lagergren@89 | 160 | * |
lagergren@89 | 161 | * This is the default parse call, which will name the function node |
lagergren@89 | 162 | * "runScript" {@link CompilerConstants#RUN_SCRIPT} |
lagergren@89 | 163 | * |
lagergren@89 | 164 | * @return function node resulting from successful parse |
jlaskey@3 | 165 | */ |
lagergren@89 | 166 | public FunctionNode parse() { |
lagergren@211 | 167 | return parse(RUN_SCRIPT.symbolName()); |
jlaskey@3 | 168 | } |
jlaskey@3 | 169 | |
jlaskey@3 | 170 | /** |
lagergren@89 | 171 | * Execute parse and return the resulting function node. |
lagergren@89 | 172 | * Errors will be thrown and the error manager will contain information |
lagergren@89 | 173 | * if parsing should fail |
lagergren@89 | 174 | * |
lagergren@89 | 175 | * @param scriptName name for the script, given to the parsed FunctionNode |
lagergren@89 | 176 | * |
lagergren@89 | 177 | * @return function node resulting from successful parse |
jlaskey@3 | 178 | */ |
jlaskey@3 | 179 | public FunctionNode parse(final String scriptName) { |
lagergren@108 | 180 | final long t0 = Timing.isEnabled() ? System.currentTimeMillis() : 0L; |
lagergren@211 | 181 | LOG.info(this, " begin for '", scriptName, "'"); |
lagergren@108 | 182 | |
jlaskey@3 | 183 | try { |
jlaskey@3 | 184 | stream = new TokenStream(); |
sundar@118 | 185 | lexer = new Lexer(source, stream, scripting && !env._no_syntax_extensions); |
jlaskey@3 | 186 | |
jlaskey@3 | 187 | // Set up first token (skips opening EOL.) |
jlaskey@3 | 188 | k = -1; |
jlaskey@3 | 189 | next(); |
jlaskey@3 | 190 | |
jlaskey@3 | 191 | // Begin parse. |
jlaskey@3 | 192 | return program(scriptName); |
jlaskey@3 | 193 | } catch (final Exception e) { |
sundar@316 | 194 | handleParseException(e); |
sundar@316 | 195 | |
sundar@316 | 196 | return null; |
sundar@316 | 197 | } finally { |
sundar@316 | 198 | final String end = this + " end '" + scriptName + "'"; |
sundar@316 | 199 | if (Timing.isEnabled()) { |
sundar@316 | 200 | Timing.accumulateTime(toString(), System.currentTimeMillis() - t0); |
sundar@316 | 201 | LOG.info(end, "' in ", (System.currentTimeMillis() - t0), " ms"); |
sundar@316 | 202 | } else { |
sundar@316 | 203 | LOG.info(end); |
jlaskey@3 | 204 | } |
sundar@316 | 205 | } |
sundar@316 | 206 | } |
sundar@316 | 207 | |
sundar@316 | 208 | /** |
sundar@316 | 209 | * Parse and return the list of function parameter list. A comma |
sundar@316 | 210 | * separated list of function parameter identifiers is expected to be parsed. |
sundar@316 | 211 | * Errors will be thrown and the error manager will contain information |
sundar@316 | 212 | * if parsing should fail. This method is used to check if parameter Strings |
sundar@316 | 213 | * passed to "Function" constructor is a valid or not. |
sundar@316 | 214 | * |
sundar@316 | 215 | * @return the list of IdentNodes representing the formal parameter list |
sundar@316 | 216 | */ |
sundar@316 | 217 | public List<IdentNode> parseFormalParameterList() { |
sundar@316 | 218 | try { |
sundar@316 | 219 | stream = new TokenStream(); |
sundar@316 | 220 | lexer = new Lexer(source, stream, scripting && !env._no_syntax_extensions); |
sundar@316 | 221 | |
sundar@316 | 222 | // Set up first token (skips opening EOL.) |
sundar@316 | 223 | k = -1; |
sundar@316 | 224 | next(); |
sundar@316 | 225 | |
sundar@316 | 226 | return formalParameterList(TokenType.EOF); |
sundar@316 | 227 | } catch (final Exception e) { |
sundar@316 | 228 | handleParseException(e); |
jlaskey@3 | 229 | return null; |
sundar@316 | 230 | } |
sundar@316 | 231 | } |
sundar@316 | 232 | |
sundar@316 | 233 | /** |
sundar@316 | 234 | * Execute parse and return the resulting function node. |
sundar@316 | 235 | * Errors will be thrown and the error manager will contain information |
sundar@316 | 236 | * if parsing should fail. This method is used to check if code String |
sundar@316 | 237 | * passed to "Function" constructor is a valid function body or not. |
sundar@316 | 238 | * |
sundar@316 | 239 | * @return function node resulting from successful parse |
sundar@316 | 240 | */ |
sundar@316 | 241 | public FunctionNode parseFunctionBody() { |
sundar@316 | 242 | try { |
sundar@316 | 243 | stream = new TokenStream(); |
sundar@316 | 244 | lexer = new Lexer(source, stream, scripting && !env._no_syntax_extensions); |
sundar@316 | 245 | |
sundar@316 | 246 | // Set up first token (skips opening EOL.) |
sundar@316 | 247 | k = -1; |
sundar@316 | 248 | next(); |
sundar@316 | 249 | |
sundar@316 | 250 | // Make a fake token for the function. |
sundar@316 | 251 | final long functionToken = Token.toDesc(FUNCTION, 0, source.getLength()); |
sundar@316 | 252 | // Set up the function to append elements. |
sundar@316 | 253 | |
sundar@316 | 254 | FunctionNode function = newFunctionNode( |
sundar@316 | 255 | functionToken, |
sundar@316 | 256 | new IdentNode(functionToken, Token.descPosition(functionToken), RUN_SCRIPT.symbolName()), |
sundar@316 | 257 | new ArrayList<IdentNode>(), |
sundar@316 | 258 | FunctionNode.Kind.NORMAL); |
sundar@316 | 259 | |
sundar@316 | 260 | functionDeclarations = new ArrayList<>(); |
sundar@316 | 261 | sourceElements(); |
sundar@316 | 262 | addFunctionDeclarations(function); |
sundar@316 | 263 | functionDeclarations = null; |
sundar@316 | 264 | |
sundar@316 | 265 | expect(EOF); |
sundar@316 | 266 | |
sundar@316 | 267 | function.setFinish(source.getLength() - 1); |
sundar@316 | 268 | |
sundar@316 | 269 | function = restoreFunctionNode(function, token); //commit code |
sundar@316 | 270 | function = function.setBody(lc, function.getBody().setNeedsScope(lc)); |
sundar@316 | 271 | return function; |
sundar@316 | 272 | } catch (final Exception e) { |
sundar@316 | 273 | handleParseException(e); |
sundar@316 | 274 | return null; |
sundar@316 | 275 | } |
sundar@316 | 276 | } |
sundar@316 | 277 | |
sundar@316 | 278 | private void handleParseException(final Exception e) { |
sundar@316 | 279 | // Extract message from exception. The message will be in error |
sundar@316 | 280 | // message format. |
sundar@316 | 281 | String message = e.getMessage(); |
sundar@316 | 282 | |
sundar@316 | 283 | // If empty message. |
sundar@316 | 284 | if (message == null) { |
sundar@316 | 285 | message = e.toString(); |
sundar@316 | 286 | } |
sundar@316 | 287 | |
sundar@316 | 288 | // Issue message. |
sundar@316 | 289 | if (e instanceof ParserException) { |
sundar@316 | 290 | errors.error((ParserException)e); |
sundar@316 | 291 | } else { |
sundar@316 | 292 | errors.error(message); |
sundar@316 | 293 | } |
sundar@316 | 294 | |
sundar@316 | 295 | if (env._dump_on_error) { |
sundar@316 | 296 | e.printStackTrace(env.getErr()); |
sundar@316 | 297 | } |
jlaskey@3 | 298 | } |
jlaskey@3 | 299 | |
jlaskey@3 | 300 | /** |
jlaskey@3 | 301 | * Skip to a good parsing recovery point. |
jlaskey@3 | 302 | */ |
jlaskey@3 | 303 | private void recover(final Exception e) { |
jlaskey@3 | 304 | if (e != null) { |
jlaskey@3 | 305 | // Extract message from exception. The message will be in error |
jlaskey@3 | 306 | // message format. |
jlaskey@3 | 307 | String message = e.getMessage(); |
jlaskey@3 | 308 | |
jlaskey@3 | 309 | // If empty message. |
jlaskey@3 | 310 | if (message == null) { |
jlaskey@3 | 311 | message = e.toString(); |
jlaskey@3 | 312 | } |
jlaskey@3 | 313 | |
jlaskey@3 | 314 | // Issue message. |
jlaskey@3 | 315 | if (e instanceof ParserException) { |
jlaskey@3 | 316 | errors.error((ParserException)e); |
jlaskey@3 | 317 | } else { |
jlaskey@3 | 318 | errors.error(message); |
jlaskey@3 | 319 | } |
jlaskey@3 | 320 | |
sundar@118 | 321 | if (env._dump_on_error) { |
sundar@118 | 322 | e.printStackTrace(env.getErr()); |
jlaskey@3 | 323 | } |
jlaskey@3 | 324 | } |
jlaskey@3 | 325 | |
jlaskey@3 | 326 | // Skip to a recovery point. |
jlaskey@3 | 327 | loop: |
jlaskey@3 | 328 | while (true) { |
jlaskey@3 | 329 | switch (type) { |
jlaskey@3 | 330 | case EOF: |
jlaskey@3 | 331 | // Can not go any further. |
jlaskey@3 | 332 | break loop; |
jlaskey@3 | 333 | case EOL: |
jlaskey@3 | 334 | case SEMICOLON: |
jlaskey@3 | 335 | case RBRACE: |
jlaskey@3 | 336 | // Good recovery points. |
jlaskey@3 | 337 | next(); |
jlaskey@3 | 338 | break loop; |
jlaskey@3 | 339 | default: |
jlaskey@3 | 340 | // So we can recover after EOL. |
jlaskey@3 | 341 | nextOrEOL(); |
jlaskey@3 | 342 | break; |
jlaskey@3 | 343 | } |
jlaskey@3 | 344 | } |
jlaskey@3 | 345 | } |
jlaskey@3 | 346 | |
jlaskey@3 | 347 | /** |
jlaskey@3 | 348 | * Set up a new block. |
jlaskey@3 | 349 | * |
jlaskey@3 | 350 | * @return New block. |
jlaskey@3 | 351 | */ |
jlaskey@3 | 352 | private Block newBlock() { |
lagergren@253 | 353 | return lc.push(new Block(line, token, Token.descPosition(token))); |
jlaskey@3 | 354 | } |
jlaskey@3 | 355 | |
jlaskey@3 | 356 | /** |
jlaskey@3 | 357 | * Set up a new function block. |
jlaskey@3 | 358 | * |
jlaskey@3 | 359 | * @param ident Name of function. |
jlaskey@3 | 360 | * @return New block. |
jlaskey@3 | 361 | */ |
lagergren@211 | 362 | private FunctionNode newFunctionNode(final long startToken, final IdentNode ident, final List<IdentNode> parameters, final FunctionNode.Kind kind) { |
jlaskey@3 | 363 | // Build function name. |
jlaskey@3 | 364 | final StringBuilder sb = new StringBuilder(); |
jlaskey@3 | 365 | |
lagergren@211 | 366 | final FunctionNode parentFunction = lc.getCurrentFunction(); |
lagergren@211 | 367 | if (parentFunction != null && !parentFunction.isProgram()) { |
attila@144 | 368 | sb.append(parentFunction.getName()).append('$'); |
jlaskey@3 | 369 | } |
jlaskey@3 | 370 | |
lagergren@211 | 371 | sb.append(ident != null ? ident.getName() : FUNCTION_PREFIX.symbolName()); |
lagergren@89 | 372 | final String name = namespace.uniqueName(sb.toString()); |
lagergren@211 | 373 | assert parentFunction != null || name.equals(RUN_SCRIPT.symbolName()) : "name = " + name;// must not rename runScript(). |
lagergren@211 | 374 | |
lagergren@211 | 375 | int flags = 0; |
lagergren@211 | 376 | if (parentFunction == null) { |
lagergren@211 | 377 | flags |= FunctionNode.IS_PROGRAM; |
lagergren@211 | 378 | } |
lagergren@211 | 379 | if (isStrictMode) { |
lagergren@211 | 380 | flags |= FunctionNode.IS_STRICT; |
lagergren@211 | 381 | } |
lagergren@247 | 382 | if (env._specialize_calls != null) { |
lagergren@247 | 383 | if (env._specialize_calls.contains(name)) { |
lagergren@247 | 384 | flags |= FunctionNode.CAN_SPECIALIZE; |
lagergren@247 | 385 | } |
lagergren@247 | 386 | } |
jlaskey@3 | 387 | |
jlaskey@3 | 388 | // Start new block. |
lagergren@211 | 389 | FunctionNode functionNode = |
lagergren@211 | 390 | new FunctionNode( |
lagergren@211 | 391 | source, |
lagergren@253 | 392 | line, //TODO? |
lagergren@211 | 393 | token, |
lagergren@211 | 394 | Token.descPosition(token), |
lagergren@211 | 395 | startToken, |
lagergren@211 | 396 | namespace, |
lagergren@211 | 397 | ident, |
lagergren@211 | 398 | name, |
lagergren@211 | 399 | parameters, |
lagergren@211 | 400 | kind, |
lagergren@211 | 401 | flags); |
lagergren@211 | 402 | |
lagergren@211 | 403 | lc.push(functionNode); |
lagergren@211 | 404 | // Create new block, and just put it on the context stack, restoreFunctionNode() will associate it with the |
lagergren@211 | 405 | // FunctionNode. |
lagergren@211 | 406 | newBlock(); |
lagergren@247 | 407 | |
lagergren@211 | 408 | return functionNode; |
jlaskey@3 | 409 | } |
jlaskey@3 | 410 | |
jlaskey@3 | 411 | /** |
jlaskey@3 | 412 | * Restore the current block. |
jlaskey@3 | 413 | */ |
lagergren@211 | 414 | private Block restoreBlock(final Block block) { |
lagergren@247 | 415 | return lc.pop(block); |
lagergren@211 | 416 | } |
lagergren@211 | 417 | |
lagergren@247 | 418 | |
lagergren@211 | 419 | private FunctionNode restoreFunctionNode(final FunctionNode functionNode, final long lastToken) { |
lagergren@211 | 420 | final Block newBody = restoreBlock(lc.getFunctionBody(functionNode)); |
lagergren@211 | 421 | |
lagergren@247 | 422 | return lc.pop(functionNode). |
lagergren@247 | 423 | setBody(lc, newBody). |
lagergren@247 | 424 | setLastToken(lc, lastToken). |
lagergren@247 | 425 | setState(lc, errors.hasErrors() ? CompilationState.PARSE_ERROR : CompilationState.PARSED). |
lagergren@247 | 426 | snapshot(lc); |
lagergren@247 | 427 | } |
jlaskey@3 | 428 | |
jlaskey@3 | 429 | /** |
jlaskey@3 | 430 | * Get the statements in a block. |
jlaskey@3 | 431 | * @return Block statements. |
jlaskey@3 | 432 | */ |
jlaskey@3 | 433 | private Block getBlock(final boolean needsBraces) { |
jlaskey@3 | 434 | // Set up new block. Captures LBRACE. |
lagergren@211 | 435 | Block newBlock = newBlock(); |
jlaskey@3 | 436 | try { |
attila@144 | 437 | // Block opening brace. |
attila@144 | 438 | if (needsBraces) { |
attila@144 | 439 | expect(LBRACE); |
attila@144 | 440 | } |
lagergren@211 | 441 | // Accumulate block statements. |
lagergren@211 | 442 | statementList(); |
lagergren@211 | 443 | |
jlaskey@3 | 444 | } finally { |
lagergren@211 | 445 | newBlock = restoreBlock(newBlock); |
jlaskey@3 | 446 | } |
jlaskey@3 | 447 | |
lagergren@137 | 448 | final int possibleEnd = Token.descPosition(token) + Token.descLength(token); |
jlaskey@3 | 449 | |
jlaskey@3 | 450 | // Block closing brace. |
jlaskey@3 | 451 | if (needsBraces) { |
jlaskey@3 | 452 | expect(RBRACE); |
jlaskey@3 | 453 | } |
jlaskey@3 | 454 | |
jlaskey@3 | 455 | newBlock.setFinish(possibleEnd); |
jlaskey@3 | 456 | |
jlaskey@3 | 457 | return newBlock; |
jlaskey@3 | 458 | } |
jlaskey@3 | 459 | |
jlaskey@3 | 460 | /** |
jlaskey@3 | 461 | * Get all the statements generated by a single statement. |
jlaskey@3 | 462 | * @return Statements. |
jlaskey@3 | 463 | */ |
jlaskey@3 | 464 | private Block getStatement() { |
jlaskey@3 | 465 | if (type == LBRACE) { |
jlaskey@3 | 466 | return getBlock(true); |
jlaskey@3 | 467 | } |
jlaskey@3 | 468 | // Set up new block. Captures first token. |
lagergren@211 | 469 | Block newBlock = newBlock(); |
jlaskey@3 | 470 | try { |
jlaskey@3 | 471 | statement(); |
jlaskey@3 | 472 | } finally { |
lagergren@211 | 473 | newBlock = restoreBlock(newBlock); |
jlaskey@3 | 474 | } |
jlaskey@3 | 475 | return newBlock; |
jlaskey@3 | 476 | } |
jlaskey@3 | 477 | |
jlaskey@3 | 478 | /** |
jlaskey@3 | 479 | * Detect calls to special functions. |
jlaskey@3 | 480 | * @param ident Called function. |
jlaskey@3 | 481 | */ |
jlaskey@3 | 482 | private void detectSpecialFunction(final IdentNode ident) { |
jlaskey@3 | 483 | final String name = ident.getName(); |
jlaskey@3 | 484 | |
lagergren@211 | 485 | if (EVAL.symbolName().equals(name)) { |
attila@233 | 486 | markEval(lc); |
jlaskey@3 | 487 | } |
jlaskey@3 | 488 | } |
jlaskey@3 | 489 | |
jlaskey@3 | 490 | /** |
jlaskey@3 | 491 | * Detect use of special properties. |
jlaskey@3 | 492 | * @param ident Referenced property. |
jlaskey@3 | 493 | */ |
jlaskey@3 | 494 | private void detectSpecialProperty(final IdentNode ident) { |
jlaskey@3 | 495 | final String name = ident.getName(); |
jlaskey@3 | 496 | |
lagergren@211 | 497 | if (ARGUMENTS.symbolName().equals(name)) { |
lagergren@211 | 498 | lc.setFlag(lc.getCurrentFunction(), FunctionNode.USES_ARGUMENTS); |
jlaskey@3 | 499 | } |
jlaskey@3 | 500 | } |
jlaskey@3 | 501 | |
jlaskey@3 | 502 | /** |
jlaskey@3 | 503 | * Tells whether a IdentNode can be used as L-value of an assignment |
jlaskey@3 | 504 | * |
jlaskey@3 | 505 | * @param ident IdentNode to be checked |
jlaskey@3 | 506 | * @return whether the ident can be used as L-value |
jlaskey@3 | 507 | */ |
jlaskey@3 | 508 | private static boolean checkIdentLValue(final IdentNode ident) { |
jlaskey@3 | 509 | return Token.descType(ident.getToken()).getKind() != TokenKind.KEYWORD; |
jlaskey@3 | 510 | } |
jlaskey@3 | 511 | |
jlaskey@3 | 512 | /** |
jlaskey@3 | 513 | * Verify an assignment expression. |
jlaskey@3 | 514 | * @param op Operation token. |
jlaskey@3 | 515 | * @param lhs Left hand side expression. |
jlaskey@3 | 516 | * @param rhs Right hand side expression. |
jlaskey@3 | 517 | * @return Verified expression. |
jlaskey@3 | 518 | */ |
jlaskey@3 | 519 | private Node verifyAssignment(final long op, final Node lhs, final Node rhs) { |
jlaskey@3 | 520 | final TokenType opType = Token.descType(op); |
jlaskey@3 | 521 | |
jlaskey@3 | 522 | switch (opType) { |
jlaskey@3 | 523 | case ASSIGN: |
jlaskey@3 | 524 | case ASSIGN_ADD: |
jlaskey@3 | 525 | case ASSIGN_BIT_AND: |
jlaskey@3 | 526 | case ASSIGN_BIT_OR: |
jlaskey@3 | 527 | case ASSIGN_BIT_XOR: |
jlaskey@3 | 528 | case ASSIGN_DIV: |
jlaskey@3 | 529 | case ASSIGN_MOD: |
jlaskey@3 | 530 | case ASSIGN_MUL: |
jlaskey@3 | 531 | case ASSIGN_SAR: |
jlaskey@3 | 532 | case ASSIGN_SHL: |
jlaskey@3 | 533 | case ASSIGN_SHR: |
jlaskey@3 | 534 | case ASSIGN_SUB: |
jlaskey@3 | 535 | if (!(lhs instanceof AccessNode || |
jlaskey@3 | 536 | lhs instanceof IndexNode || |
jlaskey@3 | 537 | lhs instanceof IdentNode)) { |
sundar@118 | 538 | if (env._early_lvalue_error) { |
lagergren@211 | 539 | throw error(JSErrorType.REFERENCE_ERROR, AbstractParser.message("invalid.lvalue"), lhs.getToken()); |
jlaskey@3 | 540 | } |
jlaskey@3 | 541 | return referenceError(lhs, rhs); |
jlaskey@3 | 542 | } |
jlaskey@3 | 543 | |
jlaskey@3 | 544 | if (lhs instanceof IdentNode) { |
lagergren@137 | 545 | if (!checkIdentLValue((IdentNode)lhs)) { |
jlaskey@3 | 546 | return referenceError(lhs, rhs); |
jlaskey@3 | 547 | } |
jlaskey@3 | 548 | verifyStrictIdent((IdentNode)lhs, "assignment"); |
jlaskey@3 | 549 | } |
jlaskey@3 | 550 | break; |
jlaskey@3 | 551 | |
jlaskey@3 | 552 | default: |
jlaskey@3 | 553 | break; |
jlaskey@3 | 554 | } |
jlaskey@3 | 555 | |
jlaskey@3 | 556 | // Build up node. |
lagergren@252 | 557 | return new BinaryNode(op, lhs, rhs); |
jlaskey@3 | 558 | } |
jlaskey@3 | 559 | |
jlaskey@3 | 560 | /** |
jlaskey@3 | 561 | * Reduce increment/decrement to simpler operations. |
jlaskey@3 | 562 | * @param firstToken First token. |
jlaskey@3 | 563 | * @param tokenType Operation token (INCPREFIX/DEC.) |
jlaskey@3 | 564 | * @param expression Left hand side expression. |
jlaskey@3 | 565 | * @param isPostfix Prefix or postfix. |
jlaskey@3 | 566 | * @return Reduced expression. |
jlaskey@3 | 567 | */ |
lagergren@252 | 568 | private static Node incDecExpression(final long firstToken, final TokenType tokenType, final Node expression, final boolean isPostfix) { |
jlaskey@3 | 569 | if (isPostfix) { |
lagergren@252 | 570 | return new UnaryNode(Token.recast(firstToken, tokenType == DECPREFIX ? DECPOSTFIX : INCPOSTFIX), expression.getStart(), Token.descPosition(firstToken) + Token.descLength(firstToken), expression); |
jlaskey@3 | 571 | } |
jlaskey@3 | 572 | |
lagergren@252 | 573 | return new UnaryNode(firstToken, expression); |
jlaskey@3 | 574 | } |
jlaskey@3 | 575 | |
jlaskey@3 | 576 | /** |
jlaskey@3 | 577 | * ----------------------------------------------------------------------- |
jlaskey@3 | 578 | * |
jlaskey@3 | 579 | * Grammar based on |
jlaskey@3 | 580 | * |
jlaskey@3 | 581 | * ECMAScript Language Specification |
jlaskey@3 | 582 | * ECMA-262 5th Edition / December 2009 |
jlaskey@3 | 583 | * |
jlaskey@3 | 584 | * ----------------------------------------------------------------------- |
jlaskey@3 | 585 | */ |
jlaskey@3 | 586 | |
jlaskey@3 | 587 | /** |
jlaskey@3 | 588 | * Program : |
jlaskey@3 | 589 | * SourceElements? |
jlaskey@3 | 590 | * |
jlaskey@3 | 591 | * See 14 |
jlaskey@3 | 592 | * |
jlaskey@3 | 593 | * Parse the top level script. |
jlaskey@3 | 594 | */ |
jlaskey@3 | 595 | private FunctionNode program(final String scriptName) { |
jlaskey@3 | 596 | // Make a fake token for the script. |
jlaskey@3 | 597 | final long functionToken = Token.toDesc(FUNCTION, 0, source.getLength()); |
jlaskey@3 | 598 | // Set up the script to append elements. |
lagergren@137 | 599 | |
lagergren@211 | 600 | FunctionNode script = newFunctionNode( |
lagergren@211 | 601 | functionToken, |
lagergren@252 | 602 | new IdentNode(functionToken, Token.descPosition(functionToken), scriptName), |
lagergren@211 | 603 | new ArrayList<IdentNode>(), |
lagergren@211 | 604 | FunctionNode.Kind.SCRIPT); |
lagergren@211 | 605 | |
attila@144 | 606 | functionDeclarations = new ArrayList<>(); |
jlaskey@3 | 607 | sourceElements(); |
lagergren@211 | 608 | addFunctionDeclarations(script); |
attila@144 | 609 | functionDeclarations = null; |
lagergren@211 | 610 | |
jlaskey@3 | 611 | expect(EOF); |
lagergren@211 | 612 | |
jlaskey@3 | 613 | script.setFinish(source.getLength() - 1); |
jlaskey@3 | 614 | |
lagergren@211 | 615 | script = restoreFunctionNode(script, token); //commit code |
lagergren@211 | 616 | script = script.setBody(lc, script.getBody().setNeedsScope(lc)); |
lagergren@247 | 617 | |
jlaskey@3 | 618 | return script; |
jlaskey@3 | 619 | } |
jlaskey@3 | 620 | |
jlaskey@3 | 621 | /** |
jlaskey@3 | 622 | * Directive value or null if statement is not a directive. |
jlaskey@3 | 623 | * |
jlaskey@3 | 624 | * @param stmt Statement to be checked |
jlaskey@3 | 625 | * @return Directive value if the given statement is a directive |
jlaskey@3 | 626 | */ |
jlaskey@3 | 627 | private String getDirective(final Node stmt) { |
jlaskey@3 | 628 | if (stmt instanceof ExecuteNode) { |
jlaskey@3 | 629 | final Node expr = ((ExecuteNode)stmt).getExpression(); |
jlaskey@3 | 630 | if (expr instanceof LiteralNode) { |
jlaskey@3 | 631 | final LiteralNode<?> lit = (LiteralNode<?>)expr; |
jlaskey@3 | 632 | final long litToken = lit.getToken(); |
jlaskey@3 | 633 | final TokenType tt = Token.descType(litToken); |
jlaskey@3 | 634 | // A directive is either a string or an escape string |
jlaskey@3 | 635 | if (tt == TokenType.STRING || tt == TokenType.ESCSTRING) { |
jlaskey@3 | 636 | // Make sure that we don't unescape anything. Return as seen in source! |
jlaskey@3 | 637 | return source.getString(lit.getStart(), Token.descLength(litToken)); |
jlaskey@3 | 638 | } |
jlaskey@3 | 639 | } |
jlaskey@3 | 640 | } |
jlaskey@3 | 641 | |
jlaskey@3 | 642 | return null; |
jlaskey@3 | 643 | } |
jlaskey@3 | 644 | |
jlaskey@3 | 645 | /** |
jlaskey@3 | 646 | * SourceElements : |
jlaskey@3 | 647 | * SourceElement |
jlaskey@3 | 648 | * SourceElements SourceElement |
jlaskey@3 | 649 | * |
jlaskey@3 | 650 | * See 14 |
jlaskey@3 | 651 | * |
jlaskey@3 | 652 | * Parse the elements of the script or function. |
jlaskey@3 | 653 | */ |
jlaskey@3 | 654 | private void sourceElements() { |
jlaskey@3 | 655 | List<Node> directiveStmts = null; |
jlaskey@3 | 656 | boolean checkDirective = true; |
jlaskey@3 | 657 | final boolean oldStrictMode = isStrictMode; |
jlaskey@3 | 658 | |
jlaskey@3 | 659 | try { |
jlaskey@3 | 660 | // If is a script, then process until the end of the script. |
jlaskey@3 | 661 | while (type != EOF) { |
jlaskey@3 | 662 | // Break if the end of a code block. |
jlaskey@3 | 663 | if (type == RBRACE) { |
jlaskey@3 | 664 | break; |
jlaskey@3 | 665 | } |
jlaskey@3 | 666 | |
jlaskey@3 | 667 | try { |
jlaskey@3 | 668 | // Get the next element. |
jlaskey@3 | 669 | statement(true); |
jlaskey@3 | 670 | |
jlaskey@3 | 671 | // check for directive prologues |
jlaskey@3 | 672 | if (checkDirective) { |
jlaskey@3 | 673 | // skip any debug statement like line number to get actual first line |
lagergren@211 | 674 | final Node lastStatement = lc.getLastStatement(); |
jlaskey@3 | 675 | |
jlaskey@3 | 676 | // get directive prologue, if any |
jlaskey@3 | 677 | final String directive = getDirective(lastStatement); |
jlaskey@3 | 678 | |
jlaskey@3 | 679 | // If we have seen first non-directive statement, |
jlaskey@3 | 680 | // no more directive statements!! |
jlaskey@3 | 681 | checkDirective = directive != null; |
jlaskey@3 | 682 | |
jlaskey@3 | 683 | if (checkDirective) { |
jlaskey@3 | 684 | if (!oldStrictMode) { |
jlaskey@3 | 685 | if (directiveStmts == null) { |
jlaskey@3 | 686 | directiveStmts = new ArrayList<>(); |
jlaskey@3 | 687 | } |
jlaskey@3 | 688 | directiveStmts.add(lastStatement); |
jlaskey@3 | 689 | } |
jlaskey@3 | 690 | |
jlaskey@3 | 691 | // handle use strict directive |
jlaskey@3 | 692 | if ("use strict".equals(directive)) { |
jlaskey@3 | 693 | isStrictMode = true; |
lagergren@211 | 694 | final FunctionNode function = lc.getCurrentFunction(); |
lagergren@211 | 695 | lc.setFlag(lc.getCurrentFunction(), FunctionNode.IS_STRICT); |
jlaskey@3 | 696 | |
jlaskey@3 | 697 | // We don't need to check these, if lexical environment is already strict |
jlaskey@3 | 698 | if (!oldStrictMode && directiveStmts != null) { |
jlaskey@3 | 699 | // check that directives preceding this one do not violate strictness |
jlaskey@3 | 700 | for (final Node statement : directiveStmts) { |
jlaskey@3 | 701 | // the get value will force unescape of preceeding |
jlaskey@3 | 702 | // escaped string directives |
jlaskey@3 | 703 | getValue(statement.getToken()); |
jlaskey@3 | 704 | } |
jlaskey@3 | 705 | |
jlaskey@3 | 706 | // verify that function name as well as parameter names |
lagergren@57 | 707 | // satisfy strict mode restrictions. |
jlaskey@3 | 708 | verifyStrictIdent(function.getIdent(), "function name"); |
jlaskey@3 | 709 | for (final IdentNode param : function.getParameters()) { |
jlaskey@3 | 710 | verifyStrictIdent(param, "function parameter"); |
jlaskey@3 | 711 | } |
jlaskey@3 | 712 | } |
jlaskey@3 | 713 | } |
jlaskey@3 | 714 | } |
jlaskey@3 | 715 | } |
jlaskey@3 | 716 | } catch (final Exception e) { |
lagergren@211 | 717 | //recover parsing |
jlaskey@3 | 718 | recover(e); |
jlaskey@3 | 719 | } |
jlaskey@3 | 720 | |
jlaskey@3 | 721 | // No backtracking from here on. |
jlaskey@3 | 722 | stream.commit(k); |
jlaskey@3 | 723 | } |
jlaskey@3 | 724 | } finally { |
jlaskey@3 | 725 | isStrictMode = oldStrictMode; |
jlaskey@3 | 726 | } |
jlaskey@3 | 727 | } |
jlaskey@3 | 728 | |
jlaskey@3 | 729 | /** |
jlaskey@3 | 730 | * Statement : |
jlaskey@3 | 731 | * Block |
jlaskey@3 | 732 | * VariableStatement |
jlaskey@3 | 733 | * EmptyStatement |
jlaskey@3 | 734 | * ExpressionStatement |
jlaskey@3 | 735 | * IfStatement |
jlaskey@3 | 736 | * IterationStatement |
jlaskey@3 | 737 | * ContinueStatement |
jlaskey@3 | 738 | * BreakStatement |
jlaskey@3 | 739 | * ReturnStatement |
jlaskey@3 | 740 | * WithStatement |
jlaskey@3 | 741 | * LabelledStatement |
jlaskey@3 | 742 | * SwitchStatement |
jlaskey@3 | 743 | * ThrowStatement |
jlaskey@3 | 744 | * TryStatement |
jlaskey@3 | 745 | * DebuggerStatement |
jlaskey@3 | 746 | * |
jlaskey@3 | 747 | * see 12 |
jlaskey@3 | 748 | * |
jlaskey@3 | 749 | * Parse any of the basic statement types. |
jlaskey@3 | 750 | */ |
jlaskey@3 | 751 | private void statement() { |
jlaskey@3 | 752 | statement(false); |
jlaskey@3 | 753 | } |
jlaskey@3 | 754 | |
jlaskey@3 | 755 | /** |
jlaskey@3 | 756 | * @param topLevel does this statement occur at the "top level" of a script or a function? |
jlaskey@3 | 757 | */ |
jlaskey@3 | 758 | private void statement(final boolean topLevel) { |
jlaskey@3 | 759 | if (type == FUNCTION) { |
jlaskey@3 | 760 | // As per spec (ECMA section 12), function declarations as arbitrary statement |
jlaskey@3 | 761 | // is not "portable". Implementation can issue a warning or disallow the same. |
attila@144 | 762 | functionExpression(true, topLevel); |
jlaskey@3 | 763 | return; |
jlaskey@3 | 764 | } |
jlaskey@3 | 765 | |
jlaskey@3 | 766 | switch (type) { |
jlaskey@3 | 767 | case LBRACE: |
jlaskey@3 | 768 | block(); |
jlaskey@3 | 769 | break; |
jlaskey@3 | 770 | case VAR: |
jlaskey@3 | 771 | variableStatement(true); |
jlaskey@3 | 772 | break; |
jlaskey@3 | 773 | case SEMICOLON: |
jlaskey@3 | 774 | emptyStatement(); |
jlaskey@3 | 775 | break; |
jlaskey@3 | 776 | case IF: |
jlaskey@3 | 777 | ifStatement(); |
jlaskey@3 | 778 | break; |
jlaskey@3 | 779 | case FOR: |
jlaskey@3 | 780 | forStatement(); |
jlaskey@3 | 781 | break; |
jlaskey@3 | 782 | case WHILE: |
jlaskey@3 | 783 | whileStatement(); |
jlaskey@3 | 784 | break; |
jlaskey@3 | 785 | case DO: |
jlaskey@3 | 786 | doStatement(); |
jlaskey@3 | 787 | break; |
jlaskey@3 | 788 | case CONTINUE: |
jlaskey@3 | 789 | continueStatement(); |
jlaskey@3 | 790 | break; |
jlaskey@3 | 791 | case BREAK: |
jlaskey@3 | 792 | breakStatement(); |
jlaskey@3 | 793 | break; |
jlaskey@3 | 794 | case RETURN: |
jlaskey@3 | 795 | returnStatement(); |
jlaskey@3 | 796 | break; |
jlaskey@3 | 797 | case YIELD: |
jlaskey@3 | 798 | yieldStatement(); |
jlaskey@3 | 799 | break; |
jlaskey@3 | 800 | case WITH: |
jlaskey@3 | 801 | withStatement(); |
jlaskey@3 | 802 | break; |
jlaskey@3 | 803 | case SWITCH: |
jlaskey@3 | 804 | switchStatement(); |
jlaskey@3 | 805 | break; |
jlaskey@3 | 806 | case THROW: |
jlaskey@3 | 807 | throwStatement(); |
jlaskey@3 | 808 | break; |
jlaskey@3 | 809 | case TRY: |
jlaskey@3 | 810 | tryStatement(); |
jlaskey@3 | 811 | break; |
jlaskey@3 | 812 | case DEBUGGER: |
jlaskey@3 | 813 | debuggerStatement(); |
jlaskey@3 | 814 | break; |
jlaskey@3 | 815 | case RPAREN: |
jlaskey@3 | 816 | case RBRACKET: |
jlaskey@3 | 817 | case EOF: |
jlaskey@3 | 818 | expect(SEMICOLON); |
jlaskey@3 | 819 | break; |
jlaskey@3 | 820 | default: |
jlaskey@3 | 821 | if (type == IDENT || isNonStrictModeIdent()) { |
jlaskey@3 | 822 | if (T(k + 1) == COLON) { |
jlaskey@3 | 823 | labelStatement(); |
jlaskey@3 | 824 | return; |
jlaskey@3 | 825 | } |
jlaskey@3 | 826 | } |
jlaskey@3 | 827 | |
jlaskey@3 | 828 | expressionStatement(); |
jlaskey@3 | 829 | break; |
jlaskey@3 | 830 | } |
jlaskey@3 | 831 | } |
jlaskey@3 | 832 | |
jlaskey@3 | 833 | /** |
jlaskey@3 | 834 | * block : |
jlaskey@3 | 835 | * { StatementList? } |
jlaskey@3 | 836 | * |
jlaskey@3 | 837 | * see 12.1 |
jlaskey@3 | 838 | * |
jlaskey@3 | 839 | * Parse a statement block. |
jlaskey@3 | 840 | */ |
jlaskey@3 | 841 | private void block() { |
jlaskey@3 | 842 | final Block newBlock = getBlock(true); |
jlaskey@3 | 843 | // Force block execution. |
lagergren@253 | 844 | appendStatement(new ExecuteNode(newBlock.getLineNumber(), newBlock.getToken(), finish, newBlock)); |
jlaskey@3 | 845 | } |
jlaskey@3 | 846 | |
jlaskey@3 | 847 | /** |
jlaskey@3 | 848 | * StatementList : |
jlaskey@3 | 849 | * Statement |
jlaskey@3 | 850 | * StatementList Statement |
jlaskey@3 | 851 | * |
jlaskey@3 | 852 | * See 12.1 |
jlaskey@3 | 853 | * |
jlaskey@3 | 854 | * Parse a list of statements. |
jlaskey@3 | 855 | */ |
jlaskey@3 | 856 | private void statementList() { |
jlaskey@3 | 857 | // Accumulate statements until end of list. */ |
jlaskey@3 | 858 | loop: |
jlaskey@3 | 859 | while (type != EOF) { |
jlaskey@3 | 860 | switch (type) { |
jlaskey@3 | 861 | case EOF: |
jlaskey@3 | 862 | case CASE: |
jlaskey@3 | 863 | case DEFAULT: |
jlaskey@3 | 864 | case RBRACE: |
jlaskey@3 | 865 | break loop; |
jlaskey@3 | 866 | default: |
jlaskey@3 | 867 | break; |
jlaskey@3 | 868 | } |
jlaskey@3 | 869 | |
jlaskey@3 | 870 | // Get next statement. |
jlaskey@3 | 871 | statement(); |
jlaskey@3 | 872 | } |
jlaskey@3 | 873 | } |
jlaskey@3 | 874 | |
jlaskey@3 | 875 | /** |
jlaskey@3 | 876 | * Make sure that in strict mode, the identifier name used is allowed. |
jlaskey@3 | 877 | * |
jlaskey@3 | 878 | * @param ident Identifier that is verified |
jlaskey@3 | 879 | * @param contextString String used in error message to give context to the user |
jlaskey@3 | 880 | */ |
jlaskey@3 | 881 | private void verifyStrictIdent(final IdentNode ident, final String contextString) { |
jlaskey@3 | 882 | if (isStrictMode) { |
jlaskey@3 | 883 | switch (ident.getName()) { |
jlaskey@3 | 884 | case "eval": |
jlaskey@3 | 885 | case "arguments": |
lagergren@211 | 886 | throw error(AbstractParser.message("strict.name", ident.getName(), contextString), ident.getToken()); |
jlaskey@3 | 887 | default: |
jlaskey@3 | 888 | break; |
jlaskey@3 | 889 | } |
jlaskey@3 | 890 | } |
jlaskey@3 | 891 | } |
jlaskey@3 | 892 | |
jlaskey@3 | 893 | /** |
jlaskey@3 | 894 | * VariableStatement : |
jlaskey@3 | 895 | * var VariableDeclarationList ; |
jlaskey@3 | 896 | * |
jlaskey@3 | 897 | * VariableDeclarationList : |
jlaskey@3 | 898 | * VariableDeclaration |
jlaskey@3 | 899 | * VariableDeclarationList , VariableDeclaration |
jlaskey@3 | 900 | * |
jlaskey@3 | 901 | * VariableDeclaration : |
jlaskey@3 | 902 | * Identifier Initializer? |
jlaskey@3 | 903 | * |
jlaskey@3 | 904 | * Initializer : |
jlaskey@3 | 905 | * = AssignmentExpression |
jlaskey@3 | 906 | * |
jlaskey@3 | 907 | * See 12.2 |
jlaskey@3 | 908 | * |
jlaskey@3 | 909 | * Parse a VAR statement. |
jlaskey@3 | 910 | * @param isStatement True if a statement (not used in a FOR.) |
jlaskey@3 | 911 | */ |
jlaskey@3 | 912 | private List<VarNode> variableStatement(final boolean isStatement) { |
jlaskey@3 | 913 | // VAR tested in caller. |
jlaskey@3 | 914 | next(); |
jlaskey@3 | 915 | |
jlaskey@3 | 916 | final List<VarNode> vars = new ArrayList<>(); |
jlaskey@3 | 917 | |
jlaskey@3 | 918 | while (true) { |
jlaskey@3 | 919 | // Get starting token. |
lagergren@253 | 920 | final int varLine = line; |
jlaskey@3 | 921 | final long varToken = token; |
jlaskey@3 | 922 | // Get name of var. |
jlaskey@3 | 923 | final IdentNode name = getIdent(); |
jlaskey@3 | 924 | verifyStrictIdent(name, "variable name"); |
jlaskey@3 | 925 | |
jlaskey@3 | 926 | // Assume no init. |
jlaskey@3 | 927 | Node init = null; |
jlaskey@3 | 928 | |
jlaskey@3 | 929 | // Look for initializer assignment. |
jlaskey@3 | 930 | if (type == ASSIGN) { |
jlaskey@3 | 931 | next(); |
jlaskey@3 | 932 | |
jlaskey@3 | 933 | // Get initializer expression. Suppress IN if not statement. |
jlaskey@3 | 934 | init = assignmentExpression(!isStatement); |
jlaskey@3 | 935 | } |
jlaskey@3 | 936 | |
jlaskey@3 | 937 | // Allocate var node. |
lagergren@253 | 938 | final VarNode var = new VarNode(varLine, varToken, finish, name, init); |
jlaskey@3 | 939 | vars.add(var); |
lagergren@211 | 940 | appendStatement(var); |
jlaskey@3 | 941 | |
jlaskey@3 | 942 | if (type != COMMARIGHT) { |
jlaskey@3 | 943 | break; |
jlaskey@3 | 944 | } |
jlaskey@3 | 945 | next(); |
jlaskey@3 | 946 | } |
jlaskey@3 | 947 | |
jlaskey@3 | 948 | // If is a statement then handle end of line. |
jlaskey@3 | 949 | if (isStatement) { |
jlaskey@9 | 950 | boolean semicolon = type == SEMICOLON; |
jlaskey@3 | 951 | endOfLine(); |
jlaskey@9 | 952 | if (semicolon) { |
lagergren@211 | 953 | lc.getCurrentBlock().setFinish(finish); |
jlaskey@9 | 954 | } |
jlaskey@3 | 955 | } |
jlaskey@3 | 956 | |
jlaskey@3 | 957 | return vars; |
jlaskey@3 | 958 | } |
jlaskey@3 | 959 | |
jlaskey@3 | 960 | /** |
jlaskey@3 | 961 | * EmptyStatement : |
jlaskey@3 | 962 | * ; |
jlaskey@3 | 963 | * |
jlaskey@3 | 964 | * See 12.3 |
jlaskey@3 | 965 | * |
jlaskey@3 | 966 | * Parse an empty statement. |
jlaskey@3 | 967 | */ |
jlaskey@3 | 968 | private void emptyStatement() { |
sundar@118 | 969 | if (env._empty_statements) { |
lagergren@253 | 970 | appendStatement(new EmptyNode(line, token, Token.descPosition(token) + Token.descLength(token))); |
jlaskey@3 | 971 | } |
jlaskey@3 | 972 | |
jlaskey@3 | 973 | // SEMICOLON checked in caller. |
jlaskey@3 | 974 | next(); |
jlaskey@3 | 975 | } |
jlaskey@3 | 976 | |
jlaskey@3 | 977 | /** |
jlaskey@3 | 978 | * ExpressionStatement : |
jlaskey@3 | 979 | * Expression ; // [lookahead ~( or function )] |
jlaskey@3 | 980 | * |
jlaskey@3 | 981 | * See 12.4 |
jlaskey@3 | 982 | * |
jlaskey@3 | 983 | * Parse an expression used in a statement block. |
jlaskey@3 | 984 | */ |
jlaskey@3 | 985 | private void expressionStatement() { |
jlaskey@3 | 986 | // Lookahead checked in caller. |
lagergren@253 | 987 | final int expressionLine = line; |
jlaskey@3 | 988 | final long expressionToken = token; |
jlaskey@3 | 989 | |
jlaskey@3 | 990 | // Get expression and add as statement. |
jlaskey@3 | 991 | final Node expression = expression(); |
jlaskey@3 | 992 | |
jlaskey@3 | 993 | ExecuteNode executeNode = null; |
jlaskey@3 | 994 | if (expression != null) { |
lagergren@253 | 995 | executeNode = new ExecuteNode(expressionLine, expressionToken, finish, expression); |
lagergren@211 | 996 | appendStatement(executeNode); |
jlaskey@3 | 997 | } else { |
jlaskey@3 | 998 | expect(null); |
jlaskey@3 | 999 | } |
jlaskey@3 | 1000 | |
jlaskey@3 | 1001 | endOfLine(); |
jlaskey@3 | 1002 | |
jlaskey@3 | 1003 | if (executeNode != null) { |
jlaskey@3 | 1004 | executeNode.setFinish(finish); |
lagergren@211 | 1005 | lc.getCurrentBlock().setFinish(finish); |
jlaskey@3 | 1006 | } |
jlaskey@3 | 1007 | } |
jlaskey@3 | 1008 | |
jlaskey@3 | 1009 | /** |
jlaskey@3 | 1010 | * IfStatement : |
jlaskey@3 | 1011 | * if ( Expression ) Statement else Statement |
jlaskey@3 | 1012 | * if ( Expression ) Statement |
jlaskey@3 | 1013 | * |
jlaskey@3 | 1014 | * See 12.5 |
jlaskey@3 | 1015 | * |
jlaskey@3 | 1016 | * Parse an IF statement. |
jlaskey@3 | 1017 | */ |
jlaskey@3 | 1018 | private void ifStatement() { |
jlaskey@3 | 1019 | // Capture IF token. |
lagergren@253 | 1020 | final int ifLine = line; |
jlaskey@3 | 1021 | final long ifToken = token; |
jlaskey@3 | 1022 | // IF tested in caller. |
jlaskey@3 | 1023 | next(); |
jlaskey@3 | 1024 | |
jlaskey@3 | 1025 | expect(LPAREN); |
jlaskey@3 | 1026 | final Node test = expression(); |
jlaskey@3 | 1027 | expect(RPAREN); |
jlaskey@3 | 1028 | final Block pass = getStatement(); |
jlaskey@3 | 1029 | |
jlaskey@3 | 1030 | Block fail = null; |
jlaskey@3 | 1031 | if (type == ELSE) { |
jlaskey@3 | 1032 | next(); |
jlaskey@3 | 1033 | fail = getStatement(); |
jlaskey@3 | 1034 | } |
jlaskey@3 | 1035 | |
lagergren@253 | 1036 | appendStatement(new IfNode(ifLine, ifToken, fail != null ? fail.getFinish() : pass.getFinish(), test, pass, fail)); |
jlaskey@3 | 1037 | } |
jlaskey@3 | 1038 | |
jlaskey@3 | 1039 | /** |
jlaskey@3 | 1040 | * ... IterationStatement: |
jlaskey@3 | 1041 | * ... |
jlaskey@3 | 1042 | * for ( Expression[NoIn]?; Expression? ; Expression? ) Statement |
jlaskey@3 | 1043 | * for ( var VariableDeclarationList[NoIn]; Expression? ; Expression? ) Statement |
jlaskey@3 | 1044 | * for ( LeftHandSideExpression in Expression ) Statement |
jlaskey@3 | 1045 | * for ( var VariableDeclaration[NoIn] in Expression ) Statement |
jlaskey@3 | 1046 | * |
jlaskey@3 | 1047 | * See 12.6 |
jlaskey@3 | 1048 | * |
jlaskey@3 | 1049 | * Parse a FOR statement. |
jlaskey@3 | 1050 | */ |
jlaskey@3 | 1051 | private void forStatement() { |
jlaskey@3 | 1052 | // Create FOR node, capturing FOR token. |
lagergren@253 | 1053 | ForNode forNode = new ForNode(line, token, Token.descPosition(token), null, null, null, null, ForNode.IS_FOR); |
jlaskey@3 | 1054 | |
jlaskey@3 | 1055 | // Set up new block for scope of vars. Captures first token. |
lagergren@211 | 1056 | Block outer = newBlock(); |
lagergren@211 | 1057 | lc.push(forNode); |
jlaskey@3 | 1058 | |
jlaskey@3 | 1059 | try { |
jlaskey@3 | 1060 | // FOR tested in caller. |
jlaskey@3 | 1061 | next(); |
jlaskey@3 | 1062 | |
jlaskey@3 | 1063 | // Nashorn extension: for each expression. |
jlaskey@3 | 1064 | // iterate property values rather than property names. |
sundar@118 | 1065 | if (!env._no_syntax_extensions && type == IDENT && "each".equals(getValue())) { |
lagergren@211 | 1066 | forNode = forNode.setIsForEach(lc); |
jlaskey@3 | 1067 | next(); |
jlaskey@3 | 1068 | } |
jlaskey@3 | 1069 | |
jlaskey@3 | 1070 | expect(LPAREN); |
jlaskey@3 | 1071 | |
lagergren@211 | 1072 | List<VarNode> vars = null; |
lagergren@211 | 1073 | |
lagergren@211 | 1074 | switch (type) { |
lagergren@211 | 1075 | case VAR: |
lagergren@211 | 1076 | // Var statements captured in for outer block. |
lagergren@211 | 1077 | vars = variableStatement(false); |
lagergren@211 | 1078 | break; |
lagergren@211 | 1079 | case SEMICOLON: |
lagergren@211 | 1080 | break; |
lagergren@211 | 1081 | default: |
lagergren@211 | 1082 | final Node expression = expression(unaryExpression(), COMMARIGHT.getPrecedence(), true); |
lagergren@211 | 1083 | forNode = forNode.setInit(lc, expression); |
lagergren@211 | 1084 | break; |
lagergren@211 | 1085 | } |
lagergren@211 | 1086 | |
lagergren@211 | 1087 | switch (type) { |
lagergren@211 | 1088 | case SEMICOLON: |
lagergren@211 | 1089 | // for (init; test; modify) |
lagergren@211 | 1090 | expect(SEMICOLON); |
lagergren@211 | 1091 | if (type != SEMICOLON) { |
lagergren@211 | 1092 | forNode = forNode.setTest(lc, expression()); |
lagergren@211 | 1093 | } |
lagergren@211 | 1094 | expect(SEMICOLON); |
lagergren@211 | 1095 | if (type != RPAREN) { |
lagergren@211 | 1096 | forNode = forNode.setModify(lc, expression()); |
lagergren@211 | 1097 | } |
lagergren@211 | 1098 | break; |
lagergren@211 | 1099 | |
lagergren@211 | 1100 | case IN: |
lagergren@211 | 1101 | forNode = forNode.setIsForIn(lc); |
lagergren@211 | 1102 | if (vars != null) { |
lagergren@211 | 1103 | // for (var i in obj) |
lagergren@211 | 1104 | if (vars.size() == 1) { |
lagergren@211 | 1105 | forNode = forNode.setInit(lc, new IdentNode(vars.get(0).getName())); |
lagergren@211 | 1106 | } else { |
lagergren@211 | 1107 | // for (var i, j in obj) is invalid |
lagergren@211 | 1108 | throw error(AbstractParser.message("many.vars.in.for.in.loop"), vars.get(1).getToken()); |
lagergren@211 | 1109 | } |
lagergren@211 | 1110 | |
lagergren@211 | 1111 | } else { |
lagergren@211 | 1112 | // for (expr in obj) |
lagergren@211 | 1113 | final Node init = forNode.getInit(); |
lagergren@211 | 1114 | assert init != null : "for..in init expression can not be null here"; |
lagergren@211 | 1115 | |
lagergren@211 | 1116 | // check if initial expression is a valid L-value |
lagergren@211 | 1117 | if (!(init instanceof AccessNode || |
lagergren@211 | 1118 | init instanceof IndexNode || |
lagergren@211 | 1119 | init instanceof IdentNode)) { |
lagergren@211 | 1120 | throw error(AbstractParser.message("not.lvalue.for.in.loop"), init.getToken()); |
lagergren@211 | 1121 | } |
lagergren@211 | 1122 | |
lagergren@211 | 1123 | if (init instanceof IdentNode) { |
lagergren@211 | 1124 | if (!checkIdentLValue((IdentNode)init)) { |
lagergren@211 | 1125 | throw error(AbstractParser.message("not.lvalue.for.in.loop"), init.getToken()); |
lagergren@211 | 1126 | } |
lagergren@211 | 1127 | verifyStrictIdent((IdentNode)init, "for-in iterator"); |
lagergren@211 | 1128 | } |
lagergren@211 | 1129 | } |
lagergren@211 | 1130 | |
lagergren@211 | 1131 | next(); |
lagergren@211 | 1132 | |
lagergren@211 | 1133 | // Get the collection expression. |
lagergren@211 | 1134 | forNode = forNode.setModify(lc, expression()); |
lagergren@211 | 1135 | break; |
lagergren@211 | 1136 | |
lagergren@211 | 1137 | default: |
lagergren@211 | 1138 | expect(SEMICOLON); |
lagergren@211 | 1139 | break; |
lagergren@211 | 1140 | } |
jlaskey@3 | 1141 | |
jlaskey@3 | 1142 | expect(RPAREN); |
jlaskey@3 | 1143 | |
jlaskey@3 | 1144 | // Set the for body. |
jlaskey@3 | 1145 | final Block body = getStatement(); |
lagergren@211 | 1146 | forNode = forNode.setBody(lc, body); |
jlaskey@3 | 1147 | forNode.setFinish(body.getFinish()); |
jlaskey@3 | 1148 | outer.setFinish(body.getFinish()); |
jlaskey@3 | 1149 | |
lagergren@211 | 1150 | appendStatement(forNode); |
jlaskey@3 | 1151 | } finally { |
lagergren@211 | 1152 | lc.pop(forNode); |
lagergren@211 | 1153 | outer = restoreBlock(outer); |
jlaskey@3 | 1154 | } |
jlaskey@3 | 1155 | |
lagergren@253 | 1156 | appendStatement(new ExecuteNode(outer.getLineNumber(), outer.getToken(), outer.getFinish(), outer)); |
jlaskey@3 | 1157 | } |
jlaskey@3 | 1158 | |
jlaskey@3 | 1159 | /** |
jlaskey@3 | 1160 | * ... IterationStatement : |
jlaskey@3 | 1161 | * ... |
jlaskey@3 | 1162 | * Expression[NoIn]?; Expression? ; Expression? |
jlaskey@3 | 1163 | * var VariableDeclarationList[NoIn]; Expression? ; Expression? |
jlaskey@3 | 1164 | * LeftHandSideExpression in Expression |
jlaskey@3 | 1165 | * var VariableDeclaration[NoIn] in Expression |
jlaskey@3 | 1166 | * |
jlaskey@3 | 1167 | * See 12.6 |
jlaskey@3 | 1168 | * |
jlaskey@3 | 1169 | * Parse the control section of a FOR statement. Also used for |
jlaskey@3 | 1170 | * comprehensions. |
jlaskey@3 | 1171 | * @param forNode Owning FOR. |
jlaskey@3 | 1172 | */ |
lagergren@211 | 1173 | |
jlaskey@3 | 1174 | |
jlaskey@3 | 1175 | /** |
jlaskey@3 | 1176 | * ...IterationStatement : |
jlaskey@3 | 1177 | * ... |
jlaskey@3 | 1178 | * while ( Expression ) Statement |
jlaskey@3 | 1179 | * ... |
jlaskey@3 | 1180 | * |
jlaskey@3 | 1181 | * See 12.6 |
jlaskey@3 | 1182 | * |
jlaskey@3 | 1183 | * Parse while statement. |
jlaskey@3 | 1184 | */ |
jlaskey@3 | 1185 | private void whileStatement() { |
jlaskey@3 | 1186 | // Capture WHILE token. |
lagergren@253 | 1187 | final int whileLine = line; |
jlaskey@3 | 1188 | final long whileToken = token; |
jlaskey@3 | 1189 | // WHILE tested in caller. |
jlaskey@3 | 1190 | next(); |
jlaskey@3 | 1191 | |
jlaskey@3 | 1192 | // Construct WHILE node. |
lagergren@253 | 1193 | WhileNode whileNode = new WhileNode(whileLine, whileToken, Token.descPosition(whileToken), false); |
lagergren@211 | 1194 | lc.push(whileNode); |
jlaskey@3 | 1195 | |
jlaskey@3 | 1196 | try { |
jlaskey@3 | 1197 | expect(LPAREN); |
lagergren@211 | 1198 | whileNode = whileNode.setTest(lc, expression()); |
jlaskey@3 | 1199 | expect(RPAREN); |
lagergren@211 | 1200 | whileNode = whileNode.setBody(lc, getStatement()); |
lagergren@211 | 1201 | appendStatement(whileNode); |
jlaskey@3 | 1202 | } finally { |
lagergren@211 | 1203 | lc.pop(whileNode); |
jlaskey@3 | 1204 | } |
jlaskey@3 | 1205 | } |
jlaskey@3 | 1206 | |
jlaskey@3 | 1207 | /** |
jlaskey@3 | 1208 | * ...IterationStatement : |
jlaskey@3 | 1209 | * ... |
jlaskey@3 | 1210 | * do Statement while( Expression ) ; |
jlaskey@3 | 1211 | * ... |
jlaskey@3 | 1212 | * |
jlaskey@3 | 1213 | * See 12.6 |
jlaskey@3 | 1214 | * |
jlaskey@3 | 1215 | * Parse DO WHILE statement. |
jlaskey@3 | 1216 | */ |
jlaskey@3 | 1217 | private void doStatement() { |
jlaskey@3 | 1218 | // Capture DO token. |
lagergren@253 | 1219 | final int doLine = line; |
jlaskey@3 | 1220 | final long doToken = token; |
jlaskey@3 | 1221 | // DO tested in the caller. |
jlaskey@3 | 1222 | next(); |
jlaskey@3 | 1223 | |
lagergren@253 | 1224 | WhileNode doWhileNode = new WhileNode(doLine, doToken, Token.descPosition(doToken), true); |
lagergren@211 | 1225 | lc.push(doWhileNode); |
jlaskey@3 | 1226 | |
jlaskey@3 | 1227 | try { |
jlaskey@3 | 1228 | // Get DO body. |
lagergren@211 | 1229 | doWhileNode = doWhileNode.setBody(lc, getStatement()); |
jlaskey@3 | 1230 | |
jlaskey@3 | 1231 | expect(WHILE); |
jlaskey@3 | 1232 | expect(LPAREN); |
lagergren@211 | 1233 | doWhileNode = doWhileNode.setTest(lc, expression()); |
jlaskey@3 | 1234 | expect(RPAREN); |
jlaskey@3 | 1235 | |
jlaskey@3 | 1236 | if (type == SEMICOLON) { |
jlaskey@3 | 1237 | endOfLine(); |
jlaskey@3 | 1238 | } |
jlaskey@3 | 1239 | doWhileNode.setFinish(finish); |
lagergren@211 | 1240 | appendStatement(doWhileNode); |
jlaskey@3 | 1241 | } finally { |
lagergren@211 | 1242 | lc.pop(doWhileNode); |
jlaskey@3 | 1243 | } |
jlaskey@3 | 1244 | } |
jlaskey@3 | 1245 | |
jlaskey@3 | 1246 | /** |
jlaskey@3 | 1247 | * ContinueStatement : |
jlaskey@3 | 1248 | * continue Identifier? ; // [no LineTerminator here] |
jlaskey@3 | 1249 | * |
jlaskey@3 | 1250 | * See 12.7 |
jlaskey@3 | 1251 | * |
jlaskey@3 | 1252 | * Parse CONTINUE statement. |
jlaskey@3 | 1253 | */ |
jlaskey@3 | 1254 | private void continueStatement() { |
jlaskey@3 | 1255 | // Capture CONTINUE token. |
lagergren@253 | 1256 | final int continueLine = line; |
jlaskey@3 | 1257 | final long continueToken = token; |
jlaskey@3 | 1258 | // CONTINUE tested in caller. |
jlaskey@3 | 1259 | nextOrEOL(); |
jlaskey@3 | 1260 | |
jlaskey@3 | 1261 | LabelNode labelNode = null; |
jlaskey@3 | 1262 | |
jlaskey@3 | 1263 | // SEMICOLON or label. |
jlaskey@3 | 1264 | switch (type) { |
jlaskey@3 | 1265 | case RBRACE: |
jlaskey@3 | 1266 | case SEMICOLON: |
jlaskey@3 | 1267 | case EOL: |
sundar@387 | 1268 | case EOF: |
jlaskey@3 | 1269 | break; |
jlaskey@3 | 1270 | |
jlaskey@3 | 1271 | default: |
jlaskey@3 | 1272 | final IdentNode ident = getIdent(); |
lagergren@211 | 1273 | labelNode = lc.findLabel(ident.getName()); |
jlaskey@3 | 1274 | |
jlaskey@3 | 1275 | if (labelNode == null) { |
lagergren@211 | 1276 | throw error(AbstractParser.message("undefined.label", ident.getName()), ident.getToken()); |
jlaskey@3 | 1277 | } |
jlaskey@3 | 1278 | |
jlaskey@3 | 1279 | break; |
jlaskey@3 | 1280 | } |
jlaskey@3 | 1281 | |
lagergren@211 | 1282 | final IdentNode label = labelNode == null ? null : labelNode.getLabel(); |
lagergren@211 | 1283 | final LoopNode targetNode = lc.getContinueTo(label); |
jlaskey@3 | 1284 | |
jlaskey@3 | 1285 | if (targetNode == null) { |
lagergren@211 | 1286 | throw error(AbstractParser.message("illegal.continue.stmt"), continueToken); |
jlaskey@3 | 1287 | } |
jlaskey@3 | 1288 | |
jlaskey@3 | 1289 | endOfLine(); |
jlaskey@3 | 1290 | |
jlaskey@3 | 1291 | // Construct and add CONTINUE node. |
lagergren@253 | 1292 | appendStatement(new ContinueNode(continueLine, continueToken, finish, label == null ? null : new IdentNode(label))); |
jlaskey@3 | 1293 | } |
jlaskey@3 | 1294 | |
jlaskey@3 | 1295 | /** |
jlaskey@3 | 1296 | * BreakStatement : |
jlaskey@3 | 1297 | * break Identifier? ; // [no LineTerminator here] |
jlaskey@3 | 1298 | * |
jlaskey@3 | 1299 | * See 12.8 |
jlaskey@3 | 1300 | * |
jlaskey@3 | 1301 | */ |
jlaskey@3 | 1302 | private void breakStatement() { |
jlaskey@3 | 1303 | // Capture BREAK token. |
lagergren@253 | 1304 | final int breakLine = line; |
jlaskey@3 | 1305 | final long breakToken = token; |
jlaskey@3 | 1306 | // BREAK tested in caller. |
jlaskey@3 | 1307 | nextOrEOL(); |
jlaskey@3 | 1308 | |
jlaskey@3 | 1309 | LabelNode labelNode = null; |
jlaskey@3 | 1310 | |
jlaskey@3 | 1311 | // SEMICOLON or label. |
jlaskey@3 | 1312 | switch (type) { |
jlaskey@3 | 1313 | case RBRACE: |
jlaskey@3 | 1314 | case SEMICOLON: |
jlaskey@3 | 1315 | case EOL: |
sundar@387 | 1316 | case EOF: |
jlaskey@3 | 1317 | break; |
jlaskey@3 | 1318 | |
jlaskey@3 | 1319 | default: |
jlaskey@3 | 1320 | final IdentNode ident = getIdent(); |
lagergren@211 | 1321 | labelNode = lc.findLabel(ident.getName()); |
jlaskey@3 | 1322 | |
jlaskey@3 | 1323 | if (labelNode == null) { |
lagergren@211 | 1324 | throw error(AbstractParser.message("undefined.label", ident.getName()), ident.getToken()); |
jlaskey@3 | 1325 | } |
jlaskey@3 | 1326 | |
jlaskey@3 | 1327 | break; |
jlaskey@3 | 1328 | } |
jlaskey@3 | 1329 | |
lagergren@211 | 1330 | //either an explicit label - then get its node or just a "break" - get first breakable |
lagergren@211 | 1331 | //targetNode is what we are breaking out from. |
lagergren@211 | 1332 | final IdentNode label = labelNode == null ? null : labelNode.getLabel(); |
lagergren@211 | 1333 | final BreakableNode targetNode = lc.getBreakable(label); |
jlaskey@3 | 1334 | if (targetNode == null) { |
lagergren@211 | 1335 | throw error(AbstractParser.message("illegal.break.stmt"), breakToken); |
jlaskey@3 | 1336 | } |
jlaskey@3 | 1337 | |
jlaskey@3 | 1338 | endOfLine(); |
jlaskey@3 | 1339 | |
jlaskey@3 | 1340 | // Construct and add BREAK node. |
lagergren@253 | 1341 | appendStatement(new BreakNode(breakLine, breakToken, finish, label == null ? null : new IdentNode(label))); |
jlaskey@3 | 1342 | } |
jlaskey@3 | 1343 | |
jlaskey@3 | 1344 | /** |
jlaskey@3 | 1345 | * ReturnStatement : |
jlaskey@3 | 1346 | * return Expression? ; // [no LineTerminator here] |
jlaskey@3 | 1347 | * |
jlaskey@3 | 1348 | * See 12.9 |
jlaskey@3 | 1349 | * |
jlaskey@3 | 1350 | * Parse RETURN statement. |
jlaskey@3 | 1351 | */ |
jlaskey@3 | 1352 | private void returnStatement() { |
jlaskey@3 | 1353 | // check for return outside function |
lagergren@211 | 1354 | if (lc.getCurrentFunction().getKind() == FunctionNode.Kind.SCRIPT) { |
lagergren@211 | 1355 | throw error(AbstractParser.message("invalid.return")); |
jlaskey@3 | 1356 | } |
jlaskey@3 | 1357 | |
jlaskey@3 | 1358 | // Capture RETURN token. |
lagergren@253 | 1359 | final int returnLine = line; |
jlaskey@3 | 1360 | final long returnToken = token; |
jlaskey@3 | 1361 | // RETURN tested in caller. |
jlaskey@3 | 1362 | nextOrEOL(); |
jlaskey@3 | 1363 | |
jlaskey@3 | 1364 | Node expression = null; |
jlaskey@3 | 1365 | |
jlaskey@3 | 1366 | // SEMICOLON or expression. |
jlaskey@3 | 1367 | switch (type) { |
jlaskey@3 | 1368 | case RBRACE: |
jlaskey@3 | 1369 | case SEMICOLON: |
jlaskey@3 | 1370 | case EOL: |
sundar@387 | 1371 | case EOF: |
jlaskey@3 | 1372 | break; |
jlaskey@3 | 1373 | |
jlaskey@3 | 1374 | default: |
jlaskey@3 | 1375 | expression = expression(); |
jlaskey@3 | 1376 | break; |
jlaskey@3 | 1377 | } |
jlaskey@3 | 1378 | |
jlaskey@3 | 1379 | endOfLine(); |
jlaskey@3 | 1380 | |
jlaskey@3 | 1381 | // Construct and add RETURN node. |
lagergren@253 | 1382 | appendStatement(new ReturnNode(returnLine, returnToken, finish, expression)); |
jlaskey@3 | 1383 | } |
jlaskey@3 | 1384 | |
jlaskey@3 | 1385 | /** |
jlaskey@3 | 1386 | * YieldStatement : |
jlaskey@3 | 1387 | * yield Expression? ; // [no LineTerminator here] |
jlaskey@3 | 1388 | * |
jlaskey@3 | 1389 | * JavaScript 1.8 |
jlaskey@3 | 1390 | * |
jlaskey@3 | 1391 | * Parse YIELD statement. |
jlaskey@3 | 1392 | */ |
jlaskey@3 | 1393 | private void yieldStatement() { |
jlaskey@3 | 1394 | // Capture YIELD token. |
lagergren@253 | 1395 | final int yieldLine = line; |
jlaskey@3 | 1396 | final long yieldToken = token; |
jlaskey@3 | 1397 | // YIELD tested in caller. |
jlaskey@3 | 1398 | nextOrEOL(); |
jlaskey@3 | 1399 | |
jlaskey@3 | 1400 | Node expression = null; |
jlaskey@3 | 1401 | |
jlaskey@3 | 1402 | // SEMICOLON or expression. |
jlaskey@3 | 1403 | switch (type) { |
jlaskey@3 | 1404 | case RBRACE: |
jlaskey@3 | 1405 | case SEMICOLON: |
jlaskey@3 | 1406 | case EOL: |
sundar@387 | 1407 | case EOF: |
jlaskey@3 | 1408 | break; |
jlaskey@3 | 1409 | |
jlaskey@3 | 1410 | default: |
jlaskey@3 | 1411 | expression = expression(); |
jlaskey@3 | 1412 | break; |
jlaskey@3 | 1413 | } |
jlaskey@3 | 1414 | |
jlaskey@3 | 1415 | endOfLine(); |
jlaskey@3 | 1416 | |
jlaskey@3 | 1417 | // Construct and add YIELD node. |
lagergren@253 | 1418 | appendStatement(new ReturnNode(yieldLine, yieldToken, finish, expression)); |
jlaskey@3 | 1419 | } |
jlaskey@3 | 1420 | |
jlaskey@3 | 1421 | /** |
jlaskey@3 | 1422 | * WithStatement : |
jlaskey@3 | 1423 | * with ( Expression ) Statement |
jlaskey@3 | 1424 | * |
jlaskey@3 | 1425 | * See 12.10 |
jlaskey@3 | 1426 | * |
jlaskey@3 | 1427 | * Parse WITH statement. |
jlaskey@3 | 1428 | */ |
jlaskey@3 | 1429 | private void withStatement() { |
jlaskey@3 | 1430 | // Capture WITH token. |
lagergren@253 | 1431 | final int withLine = line; |
jlaskey@3 | 1432 | final long withToken = token; |
jlaskey@3 | 1433 | // WITH tested in caller. |
jlaskey@3 | 1434 | next(); |
jlaskey@3 | 1435 | |
jlaskey@3 | 1436 | // ECMA 12.10.1 strict mode restrictions |
jlaskey@3 | 1437 | if (isStrictMode) { |
lagergren@211 | 1438 | throw error(AbstractParser.message("strict.no.with"), withToken); |
jlaskey@3 | 1439 | } |
jlaskey@3 | 1440 | |
jlaskey@3 | 1441 | // Get WITH expression. |
lagergren@253 | 1442 | WithNode withNode = new WithNode(withLine, withToken, finish); |
lagergren@211 | 1443 | |
lagergren@211 | 1444 | try { |
lagergren@211 | 1445 | lc.push(withNode); |
lagergren@211 | 1446 | expect(LPAREN); |
lagergren@211 | 1447 | withNode = withNode.setExpression(lc, expression()); |
lagergren@211 | 1448 | expect(RPAREN); |
lagergren@211 | 1449 | withNode = withNode.setBody(lc, getStatement()); |
lagergren@211 | 1450 | } finally { |
lagergren@211 | 1451 | lc.pop(withNode); |
attila@144 | 1452 | } |
jlaskey@3 | 1453 | |
lagergren@211 | 1454 | appendStatement(withNode); |
jlaskey@3 | 1455 | } |
jlaskey@3 | 1456 | |
jlaskey@3 | 1457 | /** |
jlaskey@3 | 1458 | * SwitchStatement : |
jlaskey@3 | 1459 | * switch ( Expression ) CaseBlock |
jlaskey@3 | 1460 | * |
jlaskey@3 | 1461 | * CaseBlock : |
jlaskey@3 | 1462 | * { CaseClauses? } |
jlaskey@3 | 1463 | * { CaseClauses? DefaultClause CaseClauses } |
jlaskey@3 | 1464 | * |
jlaskey@3 | 1465 | * CaseClauses : |
jlaskey@3 | 1466 | * CaseClause |
jlaskey@3 | 1467 | * CaseClauses CaseClause |
jlaskey@3 | 1468 | * |
jlaskey@3 | 1469 | * CaseClause : |
jlaskey@3 | 1470 | * case Expression : StatementList? |
jlaskey@3 | 1471 | * |
jlaskey@3 | 1472 | * DefaultClause : |
jlaskey@3 | 1473 | * default : StatementList? |
jlaskey@3 | 1474 | * |
jlaskey@3 | 1475 | * See 12.11 |
jlaskey@3 | 1476 | * |
jlaskey@3 | 1477 | * Parse SWITCH statement. |
jlaskey@3 | 1478 | */ |
jlaskey@3 | 1479 | private void switchStatement() { |
lagergren@253 | 1480 | final int switchLine = line; |
jlaskey@3 | 1481 | final long switchToken = token; |
jlaskey@3 | 1482 | // SWITCH tested in caller. |
jlaskey@3 | 1483 | next(); |
jlaskey@3 | 1484 | |
jlaskey@3 | 1485 | // Create and add switch statement. |
lagergren@253 | 1486 | SwitchNode switchNode = new SwitchNode(switchLine, switchToken, Token.descPosition(switchToken), null, new ArrayList<CaseNode>(), null); |
lagergren@211 | 1487 | lc.push(switchNode); |
jlaskey@3 | 1488 | |
jlaskey@3 | 1489 | try { |
jlaskey@3 | 1490 | expect(LPAREN); |
lagergren@211 | 1491 | switchNode = switchNode.setExpression(lc, expression()); |
jlaskey@3 | 1492 | expect(RPAREN); |
jlaskey@3 | 1493 | |
jlaskey@3 | 1494 | expect(LBRACE); |
jlaskey@3 | 1495 | |
jlaskey@3 | 1496 | // Prepare to accumulate cases. |
jlaskey@3 | 1497 | final List<CaseNode> cases = new ArrayList<>(); |
jlaskey@3 | 1498 | CaseNode defaultCase = null; |
jlaskey@3 | 1499 | |
jlaskey@3 | 1500 | while (type != RBRACE) { |
jlaskey@3 | 1501 | // Prepare for next case. |
jlaskey@3 | 1502 | Node caseExpression = null; |
jlaskey@3 | 1503 | final long caseToken = token; |
jlaskey@3 | 1504 | |
jlaskey@3 | 1505 | switch (type) { |
jlaskey@3 | 1506 | case CASE: |
jlaskey@3 | 1507 | next(); |
jlaskey@3 | 1508 | caseExpression = expression(); |
jlaskey@3 | 1509 | break; |
jlaskey@3 | 1510 | |
jlaskey@3 | 1511 | case DEFAULT: |
jlaskey@3 | 1512 | if (defaultCase != null) { |
lagergren@211 | 1513 | throw error(AbstractParser.message("duplicate.default.in.switch")); |
jlaskey@3 | 1514 | } |
jlaskey@3 | 1515 | next(); |
jlaskey@3 | 1516 | break; |
jlaskey@3 | 1517 | |
jlaskey@3 | 1518 | default: |
jlaskey@3 | 1519 | // Force an error. |
jlaskey@3 | 1520 | expect(CASE); |
jlaskey@3 | 1521 | break; |
jlaskey@3 | 1522 | } |
jlaskey@3 | 1523 | |
jlaskey@3 | 1524 | expect(COLON); |
jlaskey@3 | 1525 | |
jlaskey@3 | 1526 | // Get CASE body. |
jlaskey@3 | 1527 | final Block statements = getBlock(false); |
lagergren@252 | 1528 | final CaseNode caseNode = new CaseNode(caseToken, finish, caseExpression, statements); |
jlaskey@9 | 1529 | statements.setFinish(finish); |
jlaskey@3 | 1530 | |
jlaskey@3 | 1531 | if (caseExpression == null) { |
jlaskey@3 | 1532 | defaultCase = caseNode; |
jlaskey@3 | 1533 | } |
jlaskey@3 | 1534 | |
jlaskey@3 | 1535 | cases.add(caseNode); |
jlaskey@3 | 1536 | } |
jlaskey@3 | 1537 | |
lagergren@211 | 1538 | switchNode = switchNode.setCases(lc, cases, defaultCase); |
jlaskey@3 | 1539 | next(); |
jlaskey@3 | 1540 | switchNode.setFinish(finish); |
jlaskey@3 | 1541 | |
lagergren@211 | 1542 | appendStatement(switchNode); |
jlaskey@3 | 1543 | } finally { |
lagergren@211 | 1544 | lc.pop(switchNode); |
jlaskey@3 | 1545 | } |
jlaskey@3 | 1546 | } |
jlaskey@3 | 1547 | |
jlaskey@3 | 1548 | /** |
jlaskey@3 | 1549 | * LabelledStatement : |
jlaskey@3 | 1550 | * Identifier : Statement |
jlaskey@3 | 1551 | * |
jlaskey@3 | 1552 | * See 12.12 |
jlaskey@3 | 1553 | * |
jlaskey@3 | 1554 | * Parse label statement. |
jlaskey@3 | 1555 | */ |
jlaskey@3 | 1556 | private void labelStatement() { |
jlaskey@3 | 1557 | // Capture label token. |
jlaskey@3 | 1558 | final long labelToken = token; |
jlaskey@3 | 1559 | // Get label ident. |
jlaskey@3 | 1560 | final IdentNode ident = getIdent(); |
jlaskey@3 | 1561 | |
jlaskey@3 | 1562 | expect(COLON); |
jlaskey@3 | 1563 | |
lagergren@211 | 1564 | if (lc.findLabel(ident.getName()) != null) { |
lagergren@211 | 1565 | throw error(AbstractParser.message("duplicate.label", ident.getName()), labelToken); |
jlaskey@3 | 1566 | } |
jlaskey@3 | 1567 | |
lagergren@253 | 1568 | LabelNode labelNode = new LabelNode(line, labelToken, finish, ident, null); |
jlaskey@3 | 1569 | try { |
lagergren@211 | 1570 | lc.push(labelNode); |
lagergren@211 | 1571 | labelNode = labelNode.setBody(lc, getStatement()); |
jlaskey@3 | 1572 | labelNode.setFinish(finish); |
lagergren@211 | 1573 | appendStatement(labelNode); |
jlaskey@3 | 1574 | } finally { |
lagergren@211 | 1575 | assert lc.peek() instanceof LabelNode; |
lagergren@211 | 1576 | lc.pop(labelNode); |
jlaskey@3 | 1577 | } |
jlaskey@3 | 1578 | } |
jlaskey@3 | 1579 | |
jlaskey@3 | 1580 | /** |
jlaskey@3 | 1581 | * ThrowStatement : |
jlaskey@3 | 1582 | * throw Expression ; // [no LineTerminator here] |
jlaskey@3 | 1583 | * |
jlaskey@3 | 1584 | * See 12.13 |
jlaskey@3 | 1585 | * |
jlaskey@3 | 1586 | * Parse throw statement. |
jlaskey@3 | 1587 | */ |
jlaskey@3 | 1588 | private void throwStatement() { |
jlaskey@3 | 1589 | // Capture THROW token. |
lagergren@253 | 1590 | final int throwLine = line; |
jlaskey@3 | 1591 | final long throwToken = token; |
jlaskey@3 | 1592 | // THROW tested in caller. |
jlaskey@3 | 1593 | nextOrEOL(); |
jlaskey@3 | 1594 | |
jlaskey@3 | 1595 | Node expression = null; |
jlaskey@3 | 1596 | |
jlaskey@3 | 1597 | // SEMICOLON or expression. |
jlaskey@3 | 1598 | switch (type) { |
jlaskey@3 | 1599 | case RBRACE: |
jlaskey@3 | 1600 | case SEMICOLON: |
jlaskey@3 | 1601 | case EOL: |
jlaskey@3 | 1602 | break; |
jlaskey@3 | 1603 | |
jlaskey@3 | 1604 | default: |
jlaskey@3 | 1605 | expression = expression(); |
jlaskey@3 | 1606 | break; |
jlaskey@3 | 1607 | } |
jlaskey@3 | 1608 | |
jlaskey@3 | 1609 | if (expression == null) { |
lagergren@211 | 1610 | throw error(AbstractParser.message("expected.operand", type.getNameOrType())); |
jlaskey@3 | 1611 | } |
jlaskey@3 | 1612 | |
jlaskey@3 | 1613 | endOfLine(); |
jlaskey@3 | 1614 | |
lagergren@265 | 1615 | appendStatement(new ThrowNode(throwLine, throwToken, finish, expression, 0)); |
jlaskey@3 | 1616 | } |
jlaskey@3 | 1617 | |
jlaskey@3 | 1618 | /** |
jlaskey@3 | 1619 | * TryStatement : |
jlaskey@3 | 1620 | * try Block Catch |
jlaskey@3 | 1621 | * try Block Finally |
jlaskey@3 | 1622 | * try Block Catch Finally |
jlaskey@3 | 1623 | * |
jlaskey@3 | 1624 | * Catch : |
jlaskey@3 | 1625 | * catch( Identifier if Expression ) Block |
jlaskey@3 | 1626 | * catch( Identifier ) Block |
jlaskey@3 | 1627 | * |
jlaskey@3 | 1628 | * Finally : |
jlaskey@3 | 1629 | * finally Block |
jlaskey@3 | 1630 | * |
jlaskey@3 | 1631 | * See 12.14 |
jlaskey@3 | 1632 | * |
jlaskey@3 | 1633 | * Parse TRY statement. |
jlaskey@3 | 1634 | */ |
jlaskey@3 | 1635 | private void tryStatement() { |
jlaskey@3 | 1636 | // Capture TRY token. |
lagergren@253 | 1637 | final int tryLine = line; |
jlaskey@3 | 1638 | final long tryToken = token; |
jlaskey@3 | 1639 | // TRY tested in caller. |
jlaskey@3 | 1640 | next(); |
jlaskey@3 | 1641 | |
hannesw@95 | 1642 | // Container block needed to act as target for labeled break statements |
lagergren@211 | 1643 | Block outer = newBlock(); |
hannesw@95 | 1644 | |
jlaskey@3 | 1645 | // Create try. |
jlaskey@3 | 1646 | |
jlaskey@3 | 1647 | try { |
lagergren@211 | 1648 | final Block tryBody = getBlock(true); |
jlaskey@3 | 1649 | final List<Block> catchBlocks = new ArrayList<>(); |
jlaskey@3 | 1650 | |
jlaskey@3 | 1651 | while (type == CATCH) { |
lagergren@253 | 1652 | final int catchLine = line; |
jlaskey@3 | 1653 | final long catchToken = token; |
jlaskey@3 | 1654 | next(); |
jlaskey@3 | 1655 | expect(LPAREN); |
jlaskey@3 | 1656 | final IdentNode exception = getIdent(); |
jlaskey@3 | 1657 | |
jlaskey@3 | 1658 | // ECMA 12.4.1 strict mode restrictions |
jlaskey@3 | 1659 | verifyStrictIdent(exception, "catch argument"); |
jlaskey@3 | 1660 | |
jlaskey@3 | 1661 | // Check for conditional catch. |
jlaskey@3 | 1662 | Node ifExpression = null; |
jlaskey@3 | 1663 | if (type == IF) { |
jlaskey@3 | 1664 | next(); |
jlaskey@3 | 1665 | // Get the exception condition. |
jlaskey@3 | 1666 | ifExpression = expression(); |
jlaskey@3 | 1667 | } |
jlaskey@3 | 1668 | |
jlaskey@3 | 1669 | expect(RPAREN); |
jlaskey@3 | 1670 | |
lagergren@211 | 1671 | Block catchBlock = newBlock(); |
jlaskey@3 | 1672 | try { |
jlaskey@3 | 1673 | // Get CATCH body. |
jlaskey@3 | 1674 | final Block catchBody = getBlock(true); |
lagergren@265 | 1675 | final CatchNode catchNode = new CatchNode(catchLine, catchToken, finish, exception, ifExpression, catchBody, 0); |
lagergren@211 | 1676 | appendStatement(catchNode); |
lagergren@211 | 1677 | } finally { |
lagergren@211 | 1678 | catchBlock = restoreBlock(catchBlock); |
jlaskey@3 | 1679 | catchBlocks.add(catchBlock); |
jlaskey@3 | 1680 | } |
jlaskey@3 | 1681 | |
jlaskey@3 | 1682 | // If unconditional catch then should to be the end. |
jlaskey@3 | 1683 | if (ifExpression == null) { |
jlaskey@3 | 1684 | break; |
jlaskey@3 | 1685 | } |
jlaskey@3 | 1686 | } |
jlaskey@3 | 1687 | |
jlaskey@3 | 1688 | // Prepare to capture finally statement. |
jlaskey@3 | 1689 | Block finallyStatements = null; |
jlaskey@3 | 1690 | |
jlaskey@3 | 1691 | if (type == FINALLY) { |
jlaskey@3 | 1692 | next(); |
jlaskey@3 | 1693 | finallyStatements = getBlock(true); |
jlaskey@3 | 1694 | } |
jlaskey@3 | 1695 | |
jlaskey@3 | 1696 | // Need at least one catch or a finally. |
jlaskey@3 | 1697 | if (catchBlocks.isEmpty() && finallyStatements == null) { |
lagergren@211 | 1698 | throw error(AbstractParser.message("missing.catch.or.finally"), tryToken); |
jlaskey@3 | 1699 | } |
jlaskey@3 | 1700 | |
lagergren@253 | 1701 | final TryNode tryNode = new TryNode(tryLine, tryToken, Token.descPosition(tryToken), tryBody, catchBlocks, finallyStatements); |
lagergren@211 | 1702 | // Add try. |
lagergren@211 | 1703 | assert lc.peek() == outer; |
lagergren@211 | 1704 | appendStatement(tryNode); |
lagergren@211 | 1705 | |
jlaskey@3 | 1706 | tryNode.setFinish(finish); |
hannesw@95 | 1707 | outer.setFinish(finish); |
jlaskey@3 | 1708 | |
jlaskey@3 | 1709 | } finally { |
lagergren@211 | 1710 | outer = restoreBlock(outer); |
jlaskey@3 | 1711 | } |
hannesw@95 | 1712 | |
lagergren@253 | 1713 | appendStatement(new ExecuteNode(outer.getLineNumber(), outer.getToken(), outer.getFinish(), outer)); |
jlaskey@3 | 1714 | } |
jlaskey@3 | 1715 | |
jlaskey@3 | 1716 | /** |
jlaskey@3 | 1717 | * DebuggerStatement : |
jlaskey@3 | 1718 | * debugger ; |
jlaskey@3 | 1719 | * |
jlaskey@3 | 1720 | * See 12.15 |
jlaskey@3 | 1721 | * |
jlaskey@3 | 1722 | * Parse debugger statement. |
jlaskey@3 | 1723 | */ |
jlaskey@3 | 1724 | private void debuggerStatement() { |
jlaskey@3 | 1725 | // Capture DEBUGGER token. |
lagergren@253 | 1726 | final int debuggerLine = line; |
jlaskey@3 | 1727 | final long debuggerToken = token; |
jlaskey@3 | 1728 | // DEBUGGER tested in caller. |
jlaskey@3 | 1729 | next(); |
jlaskey@3 | 1730 | endOfLine(); |
lagergren@253 | 1731 | appendStatement(new ExecuteNode(debuggerLine, debuggerToken, finish, new RuntimeNode(debuggerToken, finish, RuntimeNode.Request.DEBUGGER, new ArrayList<Node>()))); |
jlaskey@3 | 1732 | } |
jlaskey@3 | 1733 | |
jlaskey@3 | 1734 | /** |
jlaskey@3 | 1735 | * PrimaryExpression : |
jlaskey@3 | 1736 | * this |
jlaskey@3 | 1737 | * Identifier |
jlaskey@3 | 1738 | * Literal |
jlaskey@3 | 1739 | * ArrayLiteral |
jlaskey@3 | 1740 | * ObjectLiteral |
jlaskey@3 | 1741 | * ( Expression ) |
jlaskey@3 | 1742 | * |
jlaskey@3 | 1743 | * See 11.1 |
jlaskey@3 | 1744 | * |
jlaskey@3 | 1745 | * Parse primary expression. |
jlaskey@3 | 1746 | * @return Expression node. |
jlaskey@3 | 1747 | */ |
jlaskey@3 | 1748 | @SuppressWarnings("fallthrough") |
jlaskey@3 | 1749 | private Node primaryExpression() { |
jlaskey@3 | 1750 | // Capture first token. |
lagergren@253 | 1751 | final int primaryLine = line; |
jlaskey@3 | 1752 | final long primaryToken = token; |
jlaskey@3 | 1753 | |
jlaskey@3 | 1754 | switch (type) { |
jlaskey@3 | 1755 | case THIS: |
jlaskey@3 | 1756 | final String name = type.getName(); |
jlaskey@3 | 1757 | next(); |
lagergren@252 | 1758 | return new IdentNode(primaryToken, finish, name); |
jlaskey@3 | 1759 | case IDENT: |
jlaskey@3 | 1760 | final IdentNode ident = getIdent(); |
jlaskey@3 | 1761 | if (ident == null) { |
jlaskey@3 | 1762 | break; |
jlaskey@3 | 1763 | } |
jlaskey@3 | 1764 | detectSpecialProperty(ident); |
jlaskey@3 | 1765 | return ident; |
jlaskey@3 | 1766 | case OCTAL: |
jlaskey@3 | 1767 | if (isStrictMode) { |
lagergren@211 | 1768 | throw error(AbstractParser.message("strict.no.octal"), token); |
jlaskey@3 | 1769 | } |
jlaskey@3 | 1770 | case STRING: |
jlaskey@3 | 1771 | case ESCSTRING: |
jlaskey@3 | 1772 | case DECIMAL: |
jlaskey@3 | 1773 | case HEXADECIMAL: |
jlaskey@3 | 1774 | case FLOATING: |
jlaskey@3 | 1775 | case REGEX: |
jlaskey@3 | 1776 | case XML: |
jlaskey@3 | 1777 | return getLiteral(); |
jlaskey@67 | 1778 | case EXECSTRING: |
lagergren@253 | 1779 | return execString(primaryLine, primaryToken); |
jlaskey@3 | 1780 | case FALSE: |
jlaskey@3 | 1781 | next(); |
lagergren@252 | 1782 | return LiteralNode.newInstance(primaryToken, finish, false); |
jlaskey@3 | 1783 | case TRUE: |
jlaskey@3 | 1784 | next(); |
lagergren@252 | 1785 | return LiteralNode.newInstance(primaryToken, finish, true); |
jlaskey@3 | 1786 | case NULL: |
jlaskey@3 | 1787 | next(); |
lagergren@252 | 1788 | return LiteralNode.newInstance(primaryToken, finish); |
jlaskey@3 | 1789 | case LBRACKET: |
jlaskey@3 | 1790 | return arrayLiteral(); |
jlaskey@3 | 1791 | case LBRACE: |
jlaskey@3 | 1792 | return objectLiteral(); |
jlaskey@3 | 1793 | case LPAREN: |
jlaskey@3 | 1794 | next(); |
jlaskey@3 | 1795 | |
jlaskey@3 | 1796 | final Node expression = expression(); |
jlaskey@3 | 1797 | |
jlaskey@3 | 1798 | expect(RPAREN); |
jlaskey@3 | 1799 | |
jlaskey@3 | 1800 | return expression; |
jlaskey@3 | 1801 | |
jlaskey@3 | 1802 | default: |
jlaskey@3 | 1803 | // In this context some operator tokens mark the start of a literal. |
jlaskey@3 | 1804 | if (lexer.scanLiteral(primaryToken, type)) { |
jlaskey@3 | 1805 | next(); |
jlaskey@3 | 1806 | return getLiteral(); |
jlaskey@3 | 1807 | } |
jlaskey@3 | 1808 | if (isNonStrictModeIdent()) { |
jlaskey@3 | 1809 | return getIdent(); |
jlaskey@3 | 1810 | } |
jlaskey@3 | 1811 | break; |
jlaskey@3 | 1812 | } |
jlaskey@3 | 1813 | |
jlaskey@3 | 1814 | return null; |
jlaskey@3 | 1815 | } |
jlaskey@3 | 1816 | |
jlaskey@67 | 1817 | /** |
jlaskey@67 | 1818 | * Convert execString to a call to $EXEC. |
jlaskey@67 | 1819 | * |
jlaskey@67 | 1820 | * @param primaryToken Original string token. |
jlaskey@67 | 1821 | * @return callNode to $EXEC. |
jlaskey@67 | 1822 | */ |
lagergren@253 | 1823 | Node execString(final int primaryLine, final long primaryToken) { |
jlaskey@67 | 1824 | // Synthesize an ident to call $EXEC. |
lagergren@252 | 1825 | final IdentNode execIdent = new IdentNode(primaryToken, finish, ScriptingFunctions.EXEC_NAME); |
jlaskey@67 | 1826 | // Skip over EXECSTRING. |
jlaskey@67 | 1827 | next(); |
jlaskey@67 | 1828 | // Set up argument list for call. |
jlaskey@67 | 1829 | final List<Node> arguments = new ArrayList<>(); |
jlaskey@67 | 1830 | // Skip beginning of edit string expression. |
jlaskey@67 | 1831 | expect(LBRACE); |
jlaskey@67 | 1832 | // Add the following expression to arguments. |
jlaskey@67 | 1833 | arguments.add(expression()); |
jlaskey@67 | 1834 | // Skip ending of edit string expression. |
jlaskey@67 | 1835 | expect(RBRACE); |
jlaskey@67 | 1836 | |
lagergren@253 | 1837 | return new CallNode(primaryLine, primaryToken, finish, execIdent, arguments); |
jlaskey@67 | 1838 | } |
jlaskey@3 | 1839 | |
jlaskey@3 | 1840 | /** |
jlaskey@3 | 1841 | * ArrayLiteral : |
jlaskey@3 | 1842 | * [ Elision? ] |
jlaskey@3 | 1843 | * [ ElementList ] |
jlaskey@3 | 1844 | * [ ElementList , Elision? ] |
jlaskey@3 | 1845 | * [ expression for (LeftHandExpression in expression) ( (if ( Expression ) )? ] |
jlaskey@3 | 1846 | * |
jlaskey@3 | 1847 | * ElementList : Elision? AssignmentExpression |
jlaskey@3 | 1848 | * ElementList , Elision? AssignmentExpression |
jlaskey@3 | 1849 | * |
jlaskey@3 | 1850 | * Elision : |
jlaskey@3 | 1851 | * , |
jlaskey@3 | 1852 | * Elision , |
jlaskey@3 | 1853 | * |
jlaskey@3 | 1854 | * See 12.1.4 |
jlaskey@3 | 1855 | * JavaScript 1.8 |
jlaskey@3 | 1856 | * |
jlaskey@3 | 1857 | * Parse array literal. |
jlaskey@3 | 1858 | * @return Expression node. |
jlaskey@3 | 1859 | */ |
jlaskey@3 | 1860 | private Node arrayLiteral() { |
jlaskey@3 | 1861 | // Capture LBRACKET token. |
jlaskey@3 | 1862 | final long arrayToken = token; |
jlaskey@3 | 1863 | // LBRACKET tested in caller. |
jlaskey@3 | 1864 | next(); |
jlaskey@3 | 1865 | |
jlaskey@3 | 1866 | // Prepare to accummulating elements. |
jlaskey@3 | 1867 | final List<Node> elements = new ArrayList<>(); |
jlaskey@3 | 1868 | // Track elisions. |
jlaskey@3 | 1869 | boolean elision = true; |
jlaskey@3 | 1870 | loop: |
jlaskey@3 | 1871 | while (true) { |
jlaskey@3 | 1872 | switch (type) { |
jlaskey@3 | 1873 | case RBRACKET: |
jlaskey@3 | 1874 | next(); |
jlaskey@3 | 1875 | |
jlaskey@3 | 1876 | break loop; |
jlaskey@3 | 1877 | |
jlaskey@3 | 1878 | case COMMARIGHT: |
jlaskey@3 | 1879 | next(); |
jlaskey@3 | 1880 | |
jlaskey@3 | 1881 | // If no prior expression |
jlaskey@3 | 1882 | if (elision) { |
jlaskey@3 | 1883 | elements.add(null); |
jlaskey@3 | 1884 | } |
jlaskey@3 | 1885 | |
jlaskey@3 | 1886 | elision = true; |
jlaskey@3 | 1887 | |
jlaskey@3 | 1888 | break; |
jlaskey@3 | 1889 | |
jlaskey@3 | 1890 | default: |
lagergren@137 | 1891 | if (!elision) { |
lagergren@211 | 1892 | throw error(AbstractParser.message("expected.comma", type.getNameOrType())); |
jlaskey@3 | 1893 | } |
jlaskey@3 | 1894 | // Add expression element. |
jlaskey@3 | 1895 | final Node expression = assignmentExpression(false); |
jlaskey@3 | 1896 | |
jlaskey@3 | 1897 | if (expression != null) { |
jlaskey@3 | 1898 | elements.add(expression); |
jlaskey@3 | 1899 | } else { |
jlaskey@3 | 1900 | expect(RBRACKET); |
jlaskey@3 | 1901 | } |
jlaskey@3 | 1902 | |
jlaskey@3 | 1903 | elision = false; |
jlaskey@3 | 1904 | break; |
jlaskey@3 | 1905 | } |
jlaskey@3 | 1906 | } |
jlaskey@3 | 1907 | |
lagergren@252 | 1908 | return LiteralNode.newInstance(arrayToken, finish, elements); |
jlaskey@3 | 1909 | } |
jlaskey@3 | 1910 | |
jlaskey@3 | 1911 | /** |
jlaskey@3 | 1912 | * ObjectLiteral : |
jlaskey@3 | 1913 | * { } |
jlaskey@3 | 1914 | * { PropertyNameAndValueList } { PropertyNameAndValueList , } |
jlaskey@3 | 1915 | * |
jlaskey@3 | 1916 | * PropertyNameAndValueList : |
jlaskey@3 | 1917 | * PropertyAssignment |
jlaskey@3 | 1918 | * PropertyNameAndValueList , PropertyAssignment |
jlaskey@3 | 1919 | * |
jlaskey@3 | 1920 | * See 11.1.5 |
jlaskey@3 | 1921 | * |
jlaskey@3 | 1922 | * Parse an object literal. |
jlaskey@3 | 1923 | * @return Expression node. |
jlaskey@3 | 1924 | */ |
jlaskey@3 | 1925 | private Node objectLiteral() { |
jlaskey@3 | 1926 | // Capture LBRACE token. |
jlaskey@3 | 1927 | final long objectToken = token; |
jlaskey@3 | 1928 | // LBRACE tested in caller. |
jlaskey@3 | 1929 | next(); |
jlaskey@3 | 1930 | |
jlaskey@3 | 1931 | // Object context. |
jlaskey@3 | 1932 | // Prepare to accumulate elements. |
lagergren@211 | 1933 | // final List<Node> elements = new ArrayList<>(); |
lagergren@211 | 1934 | final Map<String, PropertyNode> map = new LinkedHashMap<>(); |
jlaskey@3 | 1935 | |
lagergren@137 | 1936 | // Create a block for the object literal. |
jlaskey@3 | 1937 | boolean commaSeen = true; |
jlaskey@3 | 1938 | loop: |
jlaskey@3 | 1939 | while (true) { |
jlaskey@3 | 1940 | switch (type) { |
jlaskey@3 | 1941 | case RBRACE: |
jlaskey@3 | 1942 | next(); |
jlaskey@3 | 1943 | break loop; |
jlaskey@3 | 1944 | |
jlaskey@3 | 1945 | case COMMARIGHT: |
jlaskey@3 | 1946 | next(); |
jlaskey@3 | 1947 | commaSeen = true; |
jlaskey@3 | 1948 | break; |
jlaskey@3 | 1949 | |
jlaskey@3 | 1950 | default: |
lagergren@137 | 1951 | if (!commaSeen) { |
lagergren@211 | 1952 | throw error(AbstractParser.message("expected.comma", type.getNameOrType())); |
lagergren@211 | 1953 | } |
lagergren@211 | 1954 | |
lagergren@211 | 1955 | commaSeen = false; |
lagergren@211 | 1956 | // Get and add the next property. |
lagergren@211 | 1957 | final PropertyNode property = propertyAssignment(); |
lagergren@211 | 1958 | final String key = property.getKeyName(); |
lagergren@211 | 1959 | final PropertyNode existingProperty = map.get(key); |
lagergren@211 | 1960 | |
lagergren@211 | 1961 | if (existingProperty == null) { |
lagergren@211 | 1962 | map.put(key, property); |
lagergren@211 | 1963 | // elements.add(property); |
lagergren@211 | 1964 | break; |
lagergren@211 | 1965 | } |
lagergren@211 | 1966 | |
lagergren@137 | 1967 | // ECMA section 11.1.5 Object Initialiser |
lagergren@137 | 1968 | // point # 4 on property assignment production |
lagergren@211 | 1969 | final Node value = property.getValue(); |
lagergren@211 | 1970 | final FunctionNode getter = property.getGetter(); |
lagergren@211 | 1971 | final FunctionNode setter = property.getSetter(); |
lagergren@211 | 1972 | |
lagergren@211 | 1973 | final Node prevValue = existingProperty.getValue(); |
lagergren@211 | 1974 | final FunctionNode prevGetter = existingProperty.getGetter(); |
lagergren@211 | 1975 | final FunctionNode prevSetter = existingProperty.getSetter(); |
lagergren@137 | 1976 | |
lagergren@137 | 1977 | boolean redefinitionOk = true; |
lagergren@137 | 1978 | // ECMA 11.1.5 strict mode restrictions |
lagergren@137 | 1979 | if (isStrictMode) { |
lagergren@137 | 1980 | if (value != null && prevValue != null) { |
jlaskey@3 | 1981 | redefinitionOk = false; |
jlaskey@3 | 1982 | } |
lagergren@137 | 1983 | } |
lagergren@137 | 1984 | |
lagergren@137 | 1985 | final boolean isPrevAccessor = prevGetter != null || prevSetter != null; |
lagergren@211 | 1986 | final boolean isAccessor = getter != null || setter != null; |
lagergren@137 | 1987 | |
lagergren@137 | 1988 | // data property redefined as accessor property |
lagergren@137 | 1989 | if (prevValue != null && isAccessor) { |
lagergren@137 | 1990 | redefinitionOk = false; |
lagergren@137 | 1991 | } |
lagergren@137 | 1992 | |
lagergren@137 | 1993 | // accessor property redefined as data |
lagergren@137 | 1994 | if (isPrevAccessor && value != null) { |
lagergren@137 | 1995 | redefinitionOk = false; |
lagergren@137 | 1996 | } |
lagergren@137 | 1997 | |
lagergren@137 | 1998 | if (isAccessor && isPrevAccessor) { |
lagergren@137 | 1999 | if (getter != null && prevGetter != null || |
lagergren@137 | 2000 | setter != null && prevSetter != null) { |
jlaskey@3 | 2001 | redefinitionOk = false; |
jlaskey@3 | 2002 | } |
lagergren@137 | 2003 | } |
lagergren@137 | 2004 | |
lagergren@137 | 2005 | if (!redefinitionOk) { |
lagergren@211 | 2006 | throw error(AbstractParser.message("property.redefinition", key.toString()), property.getToken()); |
lagergren@137 | 2007 | } |
lagergren@137 | 2008 | |
lagergren@211 | 2009 | PropertyNode newProperty = existingProperty; |
lagergren@137 | 2010 | if (value != null) { |
lagergren@211 | 2011 | if (prevValue == null) { |
lagergren@211 | 2012 | map.put(key, newProperty = newProperty.setValue(value)); |
lagergren@137 | 2013 | } else { |
lagergren@211 | 2014 | final long propertyToken = Token.recast(newProperty.getToken(), COMMARIGHT); |
lagergren@252 | 2015 | map.put(key, newProperty = newProperty.setValue(new BinaryNode(propertyToken, prevValue, value))); |
jlaskey@3 | 2016 | } |
jlaskey@3 | 2017 | |
lagergren@211 | 2018 | map.put(key, newProperty = newProperty.setGetter(null).setSetter(null)); |
jlaskey@3 | 2019 | } |
jlaskey@3 | 2020 | |
lagergren@137 | 2021 | if (getter != null) { |
lagergren@211 | 2022 | map.put(key, newProperty = newProperty.setGetter(getter)); |
lagergren@137 | 2023 | } |
lagergren@137 | 2024 | |
lagergren@137 | 2025 | if (setter != null) { |
lagergren@211 | 2026 | map.put(key, newProperty = newProperty.setSetter(setter)); |
lagergren@137 | 2027 | } |
lagergren@211 | 2028 | break; |
jlaskey@3 | 2029 | } |
jlaskey@3 | 2030 | } |
jlaskey@3 | 2031 | |
attila@324 | 2032 | return new ObjectNode(objectToken, finish, new ArrayList<>(map.values())); |
jlaskey@3 | 2033 | } |
jlaskey@3 | 2034 | |
jlaskey@3 | 2035 | /** |
jlaskey@3 | 2036 | * PropertyName : |
jlaskey@3 | 2037 | * IdentifierName |
jlaskey@3 | 2038 | * StringLiteral |
jlaskey@3 | 2039 | * NumericLiteral |
jlaskey@3 | 2040 | * |
jlaskey@3 | 2041 | * See 11.1.5 |
jlaskey@3 | 2042 | * |
jlaskey@3 | 2043 | * @return PropertyName node |
jlaskey@3 | 2044 | */ |
jlaskey@3 | 2045 | @SuppressWarnings("fallthrough") |
jlaskey@3 | 2046 | private PropertyKey propertyName() { |
jlaskey@3 | 2047 | switch (type) { |
jlaskey@3 | 2048 | case IDENT: |
jlaskey@3 | 2049 | return getIdent(); |
jlaskey@3 | 2050 | case OCTAL: |
jlaskey@3 | 2051 | if (isStrictMode) { |
lagergren@211 | 2052 | throw error(AbstractParser.message("strict.no.octal"), token); |
jlaskey@3 | 2053 | } |
jlaskey@3 | 2054 | case STRING: |
jlaskey@3 | 2055 | case ESCSTRING: |
jlaskey@3 | 2056 | case DECIMAL: |
jlaskey@3 | 2057 | case HEXADECIMAL: |
jlaskey@3 | 2058 | case FLOATING: |
jlaskey@3 | 2059 | return getLiteral(); |
jlaskey@3 | 2060 | default: |
jlaskey@3 | 2061 | return getIdentifierName(); |
jlaskey@3 | 2062 | } |
jlaskey@3 | 2063 | } |
jlaskey@3 | 2064 | |
jlaskey@3 | 2065 | /** |
jlaskey@3 | 2066 | * PropertyAssignment : |
jlaskey@3 | 2067 | * PropertyName : AssignmentExpression |
jlaskey@3 | 2068 | * get PropertyName ( ) { FunctionBody } |
jlaskey@3 | 2069 | * set PropertyName ( PropertySetParameterList ) { FunctionBody } |
jlaskey@3 | 2070 | * |
jlaskey@3 | 2071 | * PropertySetParameterList : |
jlaskey@3 | 2072 | * Identifier |
jlaskey@3 | 2073 | * |
jlaskey@3 | 2074 | * PropertyName : |
jlaskey@3 | 2075 | * IdentifierName |
jlaskey@3 | 2076 | * StringLiteral |
jlaskey@3 | 2077 | * NumericLiteral |
jlaskey@3 | 2078 | * |
jlaskey@3 | 2079 | * See 11.1.5 |
jlaskey@3 | 2080 | * |
jlaskey@3 | 2081 | * Parse an object literal property. |
jlaskey@3 | 2082 | * @return Property or reference node. |
jlaskey@3 | 2083 | */ |
jlaskey@3 | 2084 | private PropertyNode propertyAssignment() { |
jlaskey@3 | 2085 | // Capture firstToken. |
jlaskey@3 | 2086 | final long propertyToken = token; |
jlaskey@3 | 2087 | |
jlaskey@3 | 2088 | FunctionNode functionNode; |
jlaskey@3 | 2089 | PropertyKey propertyName; |
jlaskey@3 | 2090 | |
jlaskey@3 | 2091 | if (type == IDENT) { |
jlaskey@3 | 2092 | // Get IDENT. |
jlaskey@3 | 2093 | final String ident = (String)expectValue(IDENT); |
jlaskey@3 | 2094 | |
jlaskey@3 | 2095 | if (type != COLON) { |
jlaskey@3 | 2096 | final long getSetToken = token; |
jlaskey@3 | 2097 | |
jlaskey@3 | 2098 | switch (ident) { |
jlaskey@3 | 2099 | case "get": |
jlaskey@3 | 2100 | final PropertyKey getIdent = propertyName(); |
jlaskey@3 | 2101 | final String getterName = getIdent.getPropertyName(); |
lagergren@252 | 2102 | final IdentNode getNameNode = new IdentNode(((Node)getIdent).getToken(), finish, "get " + getterName); |
jlaskey@3 | 2103 | expect(LPAREN); |
jlaskey@3 | 2104 | expect(RPAREN); |
lagergren@211 | 2105 | functionNode = functionBody(getSetToken, getNameNode, new ArrayList<IdentNode>(), FunctionNode.Kind.GETTER); |
lagergren@252 | 2106 | return new PropertyNode(propertyToken, finish, getIdent, null, functionNode, null); |
jlaskey@3 | 2107 | |
jlaskey@3 | 2108 | case "set": |
jlaskey@3 | 2109 | final PropertyKey setIdent = propertyName(); |
jlaskey@3 | 2110 | final String setterName = setIdent.getPropertyName(); |
lagergren@252 | 2111 | final IdentNode setNameNode = new IdentNode(((Node)setIdent).getToken(), finish, "set " + setterName); |
jlaskey@3 | 2112 | expect(LPAREN); |
jlaskey@3 | 2113 | final IdentNode argIdent = getIdent(); |
jlaskey@3 | 2114 | verifyStrictIdent(argIdent, "setter argument"); |
jlaskey@3 | 2115 | expect(RPAREN); |
lagergren@211 | 2116 | List<IdentNode> parameters = new ArrayList<>(); |
jlaskey@3 | 2117 | parameters.add(argIdent); |
jlaskey@3 | 2118 | functionNode = functionBody(getSetToken, setNameNode, parameters, FunctionNode.Kind.SETTER); |
lagergren@252 | 2119 | return new PropertyNode(propertyToken, finish, setIdent, null, null, functionNode); |
jlaskey@3 | 2120 | |
jlaskey@3 | 2121 | default: |
jlaskey@3 | 2122 | break; |
jlaskey@3 | 2123 | } |
jlaskey@3 | 2124 | } |
jlaskey@3 | 2125 | |
lagergren@252 | 2126 | propertyName = new IdentNode(propertyToken, finish, ident); |
jlaskey@3 | 2127 | } else { |
jlaskey@3 | 2128 | propertyName = propertyName(); |
jlaskey@3 | 2129 | } |
jlaskey@3 | 2130 | |
jlaskey@3 | 2131 | expect(COLON); |
jlaskey@3 | 2132 | |
lagergren@252 | 2133 | return new PropertyNode(propertyToken, finish, propertyName, assignmentExpression(false), null, null); |
lagergren@211 | 2134 | } |
lagergren@211 | 2135 | |
jlaskey@3 | 2136 | /** |
jlaskey@3 | 2137 | * LeftHandSideExpression : |
jlaskey@3 | 2138 | * NewExpression |
jlaskey@3 | 2139 | * CallExpression |
jlaskey@3 | 2140 | * |
jlaskey@3 | 2141 | * CallExpression : |
jlaskey@3 | 2142 | * MemberExpression Arguments |
jlaskey@3 | 2143 | * CallExpression Arguments |
jlaskey@3 | 2144 | * CallExpression [ Expression ] |
jlaskey@3 | 2145 | * CallExpression . IdentifierName |
jlaskey@3 | 2146 | * |
jlaskey@3 | 2147 | * See 11.2 |
jlaskey@3 | 2148 | * |
jlaskey@3 | 2149 | * Parse left hand side expression. |
jlaskey@3 | 2150 | * @return Expression node. |
jlaskey@3 | 2151 | */ |
jlaskey@3 | 2152 | private Node leftHandSideExpression() { |
lagergren@253 | 2153 | int callLine = line; |
jlaskey@3 | 2154 | long callToken = token; |
jlaskey@3 | 2155 | |
jlaskey@3 | 2156 | Node lhs = memberExpression(); |
jlaskey@3 | 2157 | |
jlaskey@3 | 2158 | if (type == LPAREN) { |
jlaskey@3 | 2159 | final List<Node> arguments = argumentList(); |
jlaskey@3 | 2160 | |
jlaskey@3 | 2161 | // Catch special functions. |
jlaskey@3 | 2162 | if (lhs instanceof IdentNode) { |
jlaskey@3 | 2163 | detectSpecialFunction((IdentNode)lhs); |
jlaskey@3 | 2164 | } |
jlaskey@3 | 2165 | |
lagergren@253 | 2166 | lhs = new CallNode(callLine, callToken, finish, lhs, arguments); |
jlaskey@3 | 2167 | } |
jlaskey@3 | 2168 | |
jlaskey@3 | 2169 | loop: |
jlaskey@3 | 2170 | while (true) { |
jlaskey@3 | 2171 | // Capture token. |
lagergren@253 | 2172 | callLine = line; |
jlaskey@3 | 2173 | callToken = token; |
jlaskey@3 | 2174 | |
jlaskey@3 | 2175 | switch (type) { |
jlaskey@3 | 2176 | case LPAREN: |
jlaskey@3 | 2177 | // Get NEW or FUNCTION arguments. |
jlaskey@3 | 2178 | final List<Node> arguments = argumentList(); |
jlaskey@3 | 2179 | |
jlaskey@3 | 2180 | // Create call node. |
lagergren@253 | 2181 | lhs = new CallNode(callLine, callToken, finish, lhs, arguments); |
jlaskey@3 | 2182 | |
jlaskey@3 | 2183 | break; |
jlaskey@3 | 2184 | |
jlaskey@3 | 2185 | case LBRACKET: |
jlaskey@3 | 2186 | next(); |
jlaskey@3 | 2187 | |
jlaskey@3 | 2188 | // Get array index. |
jlaskey@3 | 2189 | final Node rhs = expression(); |
jlaskey@3 | 2190 | |
jlaskey@3 | 2191 | expect(RBRACKET); |
jlaskey@3 | 2192 | |
jlaskey@3 | 2193 | // Create indexing node. |
lagergren@252 | 2194 | lhs = new IndexNode(callToken, finish, lhs, rhs); |
jlaskey@3 | 2195 | |
jlaskey@3 | 2196 | break; |
jlaskey@3 | 2197 | |
jlaskey@3 | 2198 | case PERIOD: |
jlaskey@3 | 2199 | next(); |
jlaskey@3 | 2200 | |
jlaskey@3 | 2201 | final IdentNode property = getIdentifierName(); |
jlaskey@3 | 2202 | |
jlaskey@3 | 2203 | // Create property access node. |
lagergren@252 | 2204 | lhs = new AccessNode(callToken, finish, lhs, property); |
jlaskey@3 | 2205 | |
jlaskey@3 | 2206 | break; |
jlaskey@3 | 2207 | |
jlaskey@3 | 2208 | default: |
jlaskey@3 | 2209 | break loop; |
jlaskey@3 | 2210 | } |
jlaskey@3 | 2211 | } |
jlaskey@3 | 2212 | |
jlaskey@3 | 2213 | return lhs; |
jlaskey@3 | 2214 | } |
jlaskey@3 | 2215 | |
jlaskey@3 | 2216 | /** |
jlaskey@3 | 2217 | * NewExpression : |
jlaskey@3 | 2218 | * MemberExpression |
jlaskey@3 | 2219 | * new NewExpression |
jlaskey@3 | 2220 | * |
jlaskey@3 | 2221 | * See 11.2 |
jlaskey@3 | 2222 | * |
jlaskey@3 | 2223 | * Parse new expression. |
jlaskey@3 | 2224 | * @return Expression node. |
jlaskey@3 | 2225 | */ |
jlaskey@3 | 2226 | private Node newExpression() { |
jlaskey@3 | 2227 | final long newToken = token; |
jlaskey@3 | 2228 | // NEW is tested in caller. |
jlaskey@3 | 2229 | next(); |
jlaskey@3 | 2230 | |
jlaskey@3 | 2231 | // Get function base. |
lagergren@253 | 2232 | final int callLine = line; |
jlaskey@3 | 2233 | final Node constructor = memberExpression(); |
jlaskey@3 | 2234 | if (constructor == null) { |
jlaskey@3 | 2235 | return null; |
jlaskey@3 | 2236 | } |
jlaskey@3 | 2237 | // Get arguments. |
jlaskey@3 | 2238 | List<Node> arguments; |
jlaskey@3 | 2239 | |
jlaskey@3 | 2240 | // Allow for missing arguments. |
jlaskey@3 | 2241 | if (type == LPAREN) { |
jlaskey@3 | 2242 | arguments = argumentList(); |
jlaskey@3 | 2243 | } else { |
jlaskey@3 | 2244 | arguments = new ArrayList<>(); |
jlaskey@3 | 2245 | } |
jlaskey@3 | 2246 | |
sundar@52 | 2247 | // Nashorn extension: This is to support the following interface implementation |
sundar@52 | 2248 | // syntax: |
jlaskey@3 | 2249 | // |
jlaskey@3 | 2250 | // var r = new java.lang.Runnable() { |
jlaskey@3 | 2251 | // run: function() { println("run"); } |
jlaskey@3 | 2252 | // }; |
jlaskey@3 | 2253 | // |
jlaskey@3 | 2254 | // The object literal following the "new Constructor()" expresssion |
jlaskey@3 | 2255 | // is passed as an additional (last) argument to the constructor. |
jlaskey@3 | 2256 | |
sundar@118 | 2257 | if (!env._no_syntax_extensions && type == LBRACE) { |
jlaskey@3 | 2258 | arguments.add(objectLiteral()); |
jlaskey@3 | 2259 | } |
jlaskey@3 | 2260 | |
lagergren@253 | 2261 | final CallNode callNode = new CallNode(callLine, constructor.getToken(), finish, constructor, arguments); |
lagergren@252 | 2262 | |
lagergren@252 | 2263 | return new UnaryNode(newToken, callNode); |
jlaskey@3 | 2264 | } |
jlaskey@3 | 2265 | |
jlaskey@3 | 2266 | /** |
jlaskey@3 | 2267 | * MemberExpression : |
jlaskey@3 | 2268 | * PrimaryExpression |
jlaskey@3 | 2269 | * FunctionExpression |
jlaskey@3 | 2270 | * MemberExpression [ Expression ] |
jlaskey@3 | 2271 | * MemberExpression . IdentifierName |
jlaskey@3 | 2272 | * new MemberExpression Arguments |
jlaskey@3 | 2273 | * |
jlaskey@3 | 2274 | * See 11.2 |
jlaskey@3 | 2275 | * |
jlaskey@3 | 2276 | * Parse member expression. |
jlaskey@3 | 2277 | * @return Expression node. |
jlaskey@3 | 2278 | */ |
jlaskey@3 | 2279 | private Node memberExpression() { |
jlaskey@3 | 2280 | // Prepare to build operation. |
jlaskey@3 | 2281 | Node lhs; |
jlaskey@3 | 2282 | |
jlaskey@3 | 2283 | switch (type) { |
jlaskey@3 | 2284 | case NEW: |
jlaskey@3 | 2285 | // Get new exppression. |
jlaskey@3 | 2286 | lhs = newExpression(); |
jlaskey@3 | 2287 | break; |
jlaskey@3 | 2288 | |
jlaskey@3 | 2289 | case FUNCTION: |
jlaskey@3 | 2290 | // Get function expression. |
attila@144 | 2291 | lhs = functionExpression(false, false); |
jlaskey@3 | 2292 | break; |
jlaskey@3 | 2293 | |
jlaskey@3 | 2294 | default: |
jlaskey@3 | 2295 | // Get primary expression. |
jlaskey@3 | 2296 | lhs = primaryExpression(); |
jlaskey@3 | 2297 | break; |
jlaskey@3 | 2298 | } |
jlaskey@3 | 2299 | |
jlaskey@3 | 2300 | loop: |
jlaskey@3 | 2301 | while (true) { |
jlaskey@3 | 2302 | // Capture token. |
jlaskey@3 | 2303 | final long callToken = token; |
jlaskey@3 | 2304 | |
jlaskey@3 | 2305 | switch (type) { |
jlaskey@3 | 2306 | case LBRACKET: |
jlaskey@3 | 2307 | next(); |
jlaskey@3 | 2308 | |
jlaskey@3 | 2309 | // Get array index. |
jlaskey@3 | 2310 | final Node index = expression(); |
jlaskey@3 | 2311 | |
jlaskey@3 | 2312 | expect(RBRACKET); |
jlaskey@3 | 2313 | |
jlaskey@3 | 2314 | // Create indexing node. |
lagergren@252 | 2315 | lhs = new IndexNode(callToken, finish, lhs, index); |
jlaskey@3 | 2316 | |
jlaskey@3 | 2317 | break; |
jlaskey@3 | 2318 | |
jlaskey@3 | 2319 | case PERIOD: |
jlaskey@3 | 2320 | if (lhs == null) { |
lagergren@211 | 2321 | throw error(AbstractParser.message("expected.operand", type.getNameOrType())); |
jlaskey@3 | 2322 | } |
jlaskey@3 | 2323 | |
jlaskey@3 | 2324 | next(); |
jlaskey@3 | 2325 | |
jlaskey@3 | 2326 | final IdentNode property = getIdentifierName(); |
jlaskey@3 | 2327 | |
jlaskey@3 | 2328 | // Create property access node. |
lagergren@252 | 2329 | lhs = new AccessNode(callToken, finish, lhs, property); |
jlaskey@3 | 2330 | |
jlaskey@3 | 2331 | break; |
jlaskey@3 | 2332 | |
jlaskey@3 | 2333 | default: |
jlaskey@3 | 2334 | break loop; |
jlaskey@3 | 2335 | } |
jlaskey@3 | 2336 | } |
jlaskey@3 | 2337 | |
jlaskey@3 | 2338 | return lhs; |
jlaskey@3 | 2339 | } |
jlaskey@3 | 2340 | |
jlaskey@3 | 2341 | /** |
jlaskey@3 | 2342 | * Arguments : |
jlaskey@3 | 2343 | * ( ) |
jlaskey@3 | 2344 | * ( ArgumentList ) |
jlaskey@3 | 2345 | * |
jlaskey@3 | 2346 | * ArgumentList : |
jlaskey@3 | 2347 | * AssignmentExpression |
jlaskey@3 | 2348 | * ArgumentList , AssignmentExpression |
jlaskey@3 | 2349 | * |
jlaskey@3 | 2350 | * See 11.2 |
jlaskey@3 | 2351 | * |
jlaskey@3 | 2352 | * Parse function call arguments. |
jlaskey@3 | 2353 | * @return Argument list. |
jlaskey@3 | 2354 | */ |
jlaskey@3 | 2355 | private List<Node> argumentList() { |
jlaskey@3 | 2356 | // Prepare to accumulate list of arguments. |
jlaskey@3 | 2357 | final List<Node> nodeList = new ArrayList<>(); |
jlaskey@3 | 2358 | // LPAREN tested in caller. |
jlaskey@3 | 2359 | next(); |
jlaskey@3 | 2360 | |
jlaskey@3 | 2361 | // Track commas. |
jlaskey@3 | 2362 | boolean first = true; |
jlaskey@3 | 2363 | |
jlaskey@3 | 2364 | while (type != RPAREN) { |
jlaskey@3 | 2365 | // Comma prior to every argument except the first. |
jlaskey@3 | 2366 | if (!first) { |
jlaskey@3 | 2367 | expect(COMMARIGHT); |
jlaskey@3 | 2368 | } else { |
jlaskey@3 | 2369 | first = false; |
jlaskey@3 | 2370 | } |
jlaskey@3 | 2371 | |
jlaskey@3 | 2372 | // Get argument expression. |
jlaskey@3 | 2373 | nodeList.add(assignmentExpression(false)); |
jlaskey@3 | 2374 | } |
jlaskey@3 | 2375 | |
jlaskey@3 | 2376 | expect(RPAREN); |
jlaskey@3 | 2377 | |
jlaskey@3 | 2378 | return nodeList; |
jlaskey@3 | 2379 | } |
jlaskey@3 | 2380 | |
jlaskey@3 | 2381 | /** |
jlaskey@3 | 2382 | * FunctionDeclaration : |
jlaskey@3 | 2383 | * function Identifier ( FormalParameterList? ) { FunctionBody } |
jlaskey@3 | 2384 | * |
jlaskey@3 | 2385 | * FunctionExpression : |
jlaskey@3 | 2386 | * function Identifier? ( FormalParameterList? ) { FunctionBody } |
jlaskey@3 | 2387 | * |
jlaskey@3 | 2388 | * See 13 |
jlaskey@3 | 2389 | * |
jlaskey@3 | 2390 | * Parse function declaration. |
jlaskey@3 | 2391 | * @param isStatement True if for is a statement. |
jlaskey@3 | 2392 | * |
jlaskey@3 | 2393 | * @return Expression node. |
jlaskey@3 | 2394 | */ |
attila@144 | 2395 | private Node functionExpression(final boolean isStatement, final boolean topLevel) { |
jlaskey@3 | 2396 | final long functionToken = token; |
lagergren@253 | 2397 | final int functionLine = line; |
jlaskey@3 | 2398 | // FUNCTION is tested in caller. |
jlaskey@3 | 2399 | next(); |
jlaskey@3 | 2400 | |
jlaskey@3 | 2401 | IdentNode name = null; |
jlaskey@3 | 2402 | |
jlaskey@3 | 2403 | if (type == IDENT || isNonStrictModeIdent()) { |
jlaskey@3 | 2404 | name = getIdent(); |
jlaskey@3 | 2405 | verifyStrictIdent(name, "function name"); |
sundar@52 | 2406 | } else if (isStatement) { |
sundar@52 | 2407 | // Nashorn extension: anonymous function statements |
sundar@351 | 2408 | if (env._no_syntax_extensions) { |
sundar@52 | 2409 | expect(IDENT); |
sundar@52 | 2410 | } |
jlaskey@3 | 2411 | } |
jlaskey@3 | 2412 | |
jlaskey@3 | 2413 | // name is null, generate anonymous name |
jlaskey@3 | 2414 | boolean isAnonymous = false; |
jlaskey@3 | 2415 | if (name == null) { |
jlaskey@3 | 2416 | final String tmpName = "_L" + source.getLine(Token.descPosition(token)); |
lagergren@252 | 2417 | name = new IdentNode(functionToken, Token.descPosition(functionToken), tmpName); |
jlaskey@3 | 2418 | isAnonymous = true; |
jlaskey@3 | 2419 | } |
jlaskey@3 | 2420 | |
jlaskey@3 | 2421 | expect(LPAREN); |
jlaskey@3 | 2422 | final List<IdentNode> parameters = formalParameterList(); |
jlaskey@3 | 2423 | expect(RPAREN); |
jlaskey@3 | 2424 | |
lagergren@211 | 2425 | FunctionNode functionNode = functionBody(functionToken, name, parameters, FunctionNode.Kind.NORMAL); |
jlaskey@3 | 2426 | |
attila@144 | 2427 | if (isStatement) { |
lagergren@211 | 2428 | if (topLevel) { |
lagergren@211 | 2429 | functionNode = functionNode.setFlag(lc, FunctionNode.IS_DECLARED); |
attila@235 | 2430 | } else if (isStrictMode) { |
attila@235 | 2431 | throw error(JSErrorType.SYNTAX_ERROR, AbstractParser.message("strict.no.func.decl.here"), functionToken); |
attila@235 | 2432 | } else if (env._function_statement == ScriptEnvironment.FunctionStatementBehavior.ERROR) { |
attila@235 | 2433 | throw error(JSErrorType.SYNTAX_ERROR, AbstractParser.message("no.func.decl.here"), functionToken); |
attila@235 | 2434 | } else if (env._function_statement == ScriptEnvironment.FunctionStatementBehavior.WARNING) { |
attila@235 | 2435 | warning(JSErrorType.SYNTAX_ERROR, AbstractParser.message("no.func.decl.here.warn"), functionToken); |
attila@144 | 2436 | } |
lagergren@211 | 2437 | if (ARGUMENTS.symbolName().equals(name.getName())) { |
attila@227 | 2438 | lc.setFlag(lc.getCurrentFunction(), FunctionNode.DEFINES_ARGUMENTS); |
attila@62 | 2439 | } |
jlaskey@3 | 2440 | } |
jlaskey@3 | 2441 | |
jlaskey@3 | 2442 | if (isAnonymous) { |
lagergren@211 | 2443 | functionNode = functionNode.setFlag(lc, FunctionNode.IS_ANONYMOUS); |
jlaskey@3 | 2444 | } |
jlaskey@3 | 2445 | |
jlaskey@3 | 2446 | final int arity = parameters.size(); |
jlaskey@3 | 2447 | |
lagergren@211 | 2448 | final boolean strict = functionNode.isStrict(); |
jlaskey@3 | 2449 | if (arity > 1) { |
jlaskey@3 | 2450 | final HashSet<String> parametersSet = new HashSet<>(arity); |
jlaskey@3 | 2451 | |
jlaskey@3 | 2452 | for (int i = arity - 1; i >= 0; i--) { |
jlaskey@3 | 2453 | final IdentNode parameter = parameters.get(i); |
jlaskey@3 | 2454 | String parameterName = parameter.getName(); |
jlaskey@3 | 2455 | |
lagergren@211 | 2456 | if (ARGUMENTS.symbolName().equals(parameterName)) { |
lagergren@211 | 2457 | functionNode = functionNode.setFlag(lc, FunctionNode.DEFINES_ARGUMENTS); |
jlaskey@3 | 2458 | } |
jlaskey@3 | 2459 | |
jlaskey@3 | 2460 | if (parametersSet.contains(parameterName)) { |
jlaskey@3 | 2461 | // redefinition of parameter name |
jlaskey@3 | 2462 | if (strict) { |
lagergren@211 | 2463 | throw error(AbstractParser.message("strict.param.redefinition", parameterName), parameter.getToken()); |
jlaskey@3 | 2464 | } |
lagergren@211 | 2465 | // rename in non-strict mode |
lagergren@211 | 2466 | parameterName = functionNode.uniqueName(parameterName); |
lagergren@211 | 2467 | final long parameterToken = parameter.getToken(); |
lagergren@252 | 2468 | parameters.set(i, new IdentNode(parameterToken, Token.descPosition(parameterToken), functionNode.uniqueName(parameterName))); |
jlaskey@3 | 2469 | } |
jlaskey@3 | 2470 | |
jlaskey@3 | 2471 | parametersSet.add(parameterName); |
jlaskey@3 | 2472 | } |
jlaskey@3 | 2473 | } else if (arity == 1) { |
lagergren@211 | 2474 | if (ARGUMENTS.symbolName().equals(parameters.get(0).getName())) { |
lagergren@211 | 2475 | functionNode = functionNode.setFlag(lc, FunctionNode.DEFINES_ARGUMENTS); |
jlaskey@3 | 2476 | } |
jlaskey@3 | 2477 | } |
jlaskey@3 | 2478 | |
jlaskey@3 | 2479 | if (isStatement) { |
lagergren@253 | 2480 | final VarNode varNode = new VarNode(functionLine, functionToken, finish, name, functionNode, VarNode.IS_STATEMENT); |
lagergren@211 | 2481 | if (topLevel) { |
attila@144 | 2482 | functionDeclarations.add(varNode); |
sundar@47 | 2483 | } else { |
lagergren@211 | 2484 | appendStatement(varNode); |
sundar@47 | 2485 | } |
jlaskey@3 | 2486 | } |
jlaskey@3 | 2487 | |
attila@144 | 2488 | return functionNode; |
jlaskey@3 | 2489 | } |
jlaskey@3 | 2490 | |
jlaskey@3 | 2491 | /** |
jlaskey@3 | 2492 | * FormalParameterList : |
jlaskey@3 | 2493 | * Identifier |
jlaskey@3 | 2494 | * FormalParameterList , Identifier |
jlaskey@3 | 2495 | * |
jlaskey@3 | 2496 | * See 13 |
jlaskey@3 | 2497 | * |
jlaskey@3 | 2498 | * Parse function parameter list. |
jlaskey@3 | 2499 | * @return List of parameter nodes. |
jlaskey@3 | 2500 | */ |
jlaskey@3 | 2501 | private List<IdentNode> formalParameterList() { |
sundar@316 | 2502 | return formalParameterList(RPAREN); |
sundar@316 | 2503 | } |
sundar@316 | 2504 | |
sundar@316 | 2505 | /** |
sundar@316 | 2506 | * Same as the other method of the same name - except that the end |
sundar@316 | 2507 | * token type expected is passed as argument to this method. |
sundar@316 | 2508 | * |
sundar@316 | 2509 | * FormalParameterList : |
sundar@316 | 2510 | * Identifier |
sundar@316 | 2511 | * FormalParameterList , Identifier |
sundar@316 | 2512 | * |
sundar@316 | 2513 | * See 13 |
sundar@316 | 2514 | * |
sundar@316 | 2515 | * Parse function parameter list. |
sundar@316 | 2516 | * @return List of parameter nodes. |
sundar@316 | 2517 | */ |
sundar@316 | 2518 | private List<IdentNode> formalParameterList(final TokenType endType) { |
jlaskey@3 | 2519 | // Prepare to gather parameters. |
jlaskey@3 | 2520 | final List<IdentNode> parameters = new ArrayList<>(); |
jlaskey@3 | 2521 | // Track commas. |
jlaskey@3 | 2522 | boolean first = true; |
jlaskey@3 | 2523 | |
sundar@316 | 2524 | while (type != endType) { |
jlaskey@3 | 2525 | // Comma prior to every argument except the first. |
jlaskey@3 | 2526 | if (!first) { |
jlaskey@3 | 2527 | expect(COMMARIGHT); |
jlaskey@3 | 2528 | } else { |
jlaskey@3 | 2529 | first = false; |
jlaskey@3 | 2530 | } |
jlaskey@3 | 2531 | |
jlaskey@3 | 2532 | // Get and add parameter. |
jlaskey@3 | 2533 | final IdentNode ident = getIdent(); |
jlaskey@3 | 2534 | |
jlaskey@3 | 2535 | // ECMA 13.1 strict mode restrictions |
jlaskey@3 | 2536 | verifyStrictIdent(ident, "function parameter"); |
jlaskey@3 | 2537 | |
jlaskey@3 | 2538 | parameters.add(ident); |
jlaskey@3 | 2539 | } |
jlaskey@3 | 2540 | |
jlaskey@3 | 2541 | return parameters; |
jlaskey@3 | 2542 | } |
jlaskey@3 | 2543 | |
jlaskey@3 | 2544 | /** |
jlaskey@3 | 2545 | * FunctionBody : |
jlaskey@3 | 2546 | * SourceElements? |
jlaskey@3 | 2547 | * |
jlaskey@3 | 2548 | * See 13 |
jlaskey@3 | 2549 | * |
jlaskey@3 | 2550 | * Parse function body. |
jlaskey@3 | 2551 | * @return function node (body.) |
jlaskey@3 | 2552 | */ |
jlaskey@3 | 2553 | private FunctionNode functionBody(final long firstToken, final IdentNode ident, final List<IdentNode> parameters, final FunctionNode.Kind kind) { |
jlaskey@3 | 2554 | FunctionNode functionNode = null; |
lagergren@211 | 2555 | long lastToken = 0L; |
jlaskey@3 | 2556 | |
jlaskey@3 | 2557 | try { |
jlaskey@3 | 2558 | // Create a new function block. |
lagergren@211 | 2559 | functionNode = newFunctionNode(firstToken, ident, parameters, kind); |
jlaskey@3 | 2560 | |
jlaskey@3 | 2561 | // Nashorn extension: expression closures |
sundar@118 | 2562 | if (!env._no_syntax_extensions && type != LBRACE) { |
jlaskey@3 | 2563 | /* |
jlaskey@3 | 2564 | * Example: |
jlaskey@3 | 2565 | * |
jlaskey@3 | 2566 | * function square(x) x * x; |
jlaskey@3 | 2567 | * print(square(3)); |
jlaskey@3 | 2568 | */ |
jlaskey@3 | 2569 | |
jlaskey@3 | 2570 | // just expression as function body |
sundar@387 | 2571 | final Node expr = assignmentExpression(true); |
lagergren@211 | 2572 | assert lc.getCurrentBlock() == lc.getFunctionBody(functionNode); |
lagergren@57 | 2573 | // create a return statement - this creates code in itself and does not need to be |
lagergren@57 | 2574 | // wrapped into an ExecuteNode |
lagergren@253 | 2575 | final ReturnNode returnNode = new ReturnNode(functionNode.getLineNumber(), expr.getToken(), finish, expr); |
lagergren@211 | 2576 | appendStatement(returnNode); |
lagergren@211 | 2577 | lastToken = token; |
jlaskey@3 | 2578 | functionNode.setFinish(Token.descPosition(token) + Token.descLength(token)); |
jlaskey@3 | 2579 | |
jlaskey@3 | 2580 | } else { |
jlaskey@3 | 2581 | expect(LBRACE); |
jlaskey@3 | 2582 | |
jlaskey@3 | 2583 | // Gather the function elements. |
lagergren@253 | 2584 | final List<Statement> prevFunctionDecls = functionDeclarations; |
attila@144 | 2585 | functionDeclarations = new ArrayList<>(); |
attila@144 | 2586 | try { |
attila@144 | 2587 | sourceElements(); |
lagergren@211 | 2588 | addFunctionDeclarations(functionNode); |
attila@144 | 2589 | } finally { |
attila@144 | 2590 | functionDeclarations = prevFunctionDecls; |
attila@144 | 2591 | } |
jlaskey@3 | 2592 | |
lagergren@211 | 2593 | lastToken = token; |
jlaskey@3 | 2594 | expect(RBRACE); |
jlaskey@3 | 2595 | functionNode.setFinish(finish); |
jlaskey@3 | 2596 | |
jlaskey@3 | 2597 | } |
jlaskey@3 | 2598 | } finally { |
lagergren@211 | 2599 | functionNode = restoreFunctionNode(functionNode, lastToken); |
jlaskey@3 | 2600 | } |
jlaskey@3 | 2601 | return functionNode; |
jlaskey@3 | 2602 | } |
jlaskey@3 | 2603 | |
lagergren@211 | 2604 | private void addFunctionDeclarations(final FunctionNode functionNode) { |
lagergren@211 | 2605 | assert lc.peek() == lc.getFunctionBody(functionNode); |
lagergren@211 | 2606 | VarNode lastDecl = null; |
lagergren@211 | 2607 | for (int i = functionDeclarations.size() - 1; i >= 0; i--) { |
lagergren@253 | 2608 | Statement decl = functionDeclarations.get(i); |
lagergren@211 | 2609 | if (lastDecl == null && decl instanceof VarNode) { |
lagergren@211 | 2610 | decl = lastDecl = ((VarNode)decl).setFlag(VarNode.IS_LAST_FUNCTION_DECLARATION); |
lagergren@211 | 2611 | lc.setFlag(functionNode, FunctionNode.HAS_FUNCTION_DECLARATIONS); |
lagergren@211 | 2612 | } |
lagergren@211 | 2613 | prependStatement(decl); |
lagergren@211 | 2614 | } |
lagergren@211 | 2615 | } |
lagergren@211 | 2616 | |
lagergren@252 | 2617 | private static RuntimeNode referenceError(final Node lhs, final Node rhs) { |
jlaskey@3 | 2618 | final ArrayList<Node> args = new ArrayList<>(); |
jlaskey@3 | 2619 | args.add(lhs); |
jlaskey@3 | 2620 | if (rhs == null) { |
lagergren@252 | 2621 | args.add(LiteralNode.newInstance(lhs.getToken(), lhs.getFinish())); |
jlaskey@3 | 2622 | } else { |
jlaskey@3 | 2623 | args.add(rhs); |
jlaskey@3 | 2624 | } |
lagergren@252 | 2625 | args.add(LiteralNode.newInstance(lhs.getToken(), lhs.getFinish(), lhs.toString())); |
lagergren@252 | 2626 | return new RuntimeNode(lhs.getToken(), lhs.getFinish(), RuntimeNode.Request.REFERENCE_ERROR, args); |
jlaskey@3 | 2627 | } |
jlaskey@3 | 2628 | |
jlaskey@3 | 2629 | /* |
jlaskey@3 | 2630 | * parse LHS [a, b, ..., c]. |
jlaskey@3 | 2631 | * |
jlaskey@3 | 2632 | * JavaScript 1.8. |
jlaskey@3 | 2633 | */ |
jlaskey@3 | 2634 | //private Node destructureExpression() { |
jlaskey@3 | 2635 | // return null; |
jlaskey@3 | 2636 | //} |
jlaskey@3 | 2637 | |
jlaskey@3 | 2638 | /** |
jlaskey@3 | 2639 | * PostfixExpression : |
jlaskey@3 | 2640 | * LeftHandSideExpression |
jlaskey@3 | 2641 | * LeftHandSideExpression ++ // [no LineTerminator here] |
jlaskey@3 | 2642 | * LeftHandSideExpression -- // [no LineTerminator here] |
jlaskey@3 | 2643 | * |
jlaskey@3 | 2644 | * See 11.3 |
jlaskey@3 | 2645 | * |
jlaskey@3 | 2646 | * UnaryExpression : |
jlaskey@3 | 2647 | * PostfixExpression |
jlaskey@3 | 2648 | * delete UnaryExpression |
jlaskey@3 | 2649 | * Node UnaryExpression |
jlaskey@3 | 2650 | * typeof UnaryExpression |
jlaskey@3 | 2651 | * ++ UnaryExpression |
jlaskey@3 | 2652 | * -- UnaryExpression |
jlaskey@3 | 2653 | * + UnaryExpression |
jlaskey@3 | 2654 | * - UnaryExpression |
jlaskey@3 | 2655 | * ~ UnaryExpression |
jlaskey@3 | 2656 | * ! UnaryExpression |
jlaskey@3 | 2657 | * |
jlaskey@3 | 2658 | * See 11.4 |
jlaskey@3 | 2659 | * |
jlaskey@3 | 2660 | * Parse unary expression. |
jlaskey@3 | 2661 | * @return Expression node. |
jlaskey@3 | 2662 | */ |
jlaskey@3 | 2663 | private Node unaryExpression() { |
lagergren@253 | 2664 | final int unaryLine = line; |
jlaskey@3 | 2665 | final long unaryToken = token; |
jlaskey@3 | 2666 | |
jlaskey@3 | 2667 | switch (type) { |
lagergren@253 | 2668 | case DELETE: { |
lagergren@253 | 2669 | next(); |
lagergren@253 | 2670 | final Node expr = unaryExpression(); |
lagergren@253 | 2671 | if (expr instanceof BaseNode || expr instanceof IdentNode) { |
lagergren@253 | 2672 | return new UnaryNode(unaryToken, expr); |
lagergren@253 | 2673 | } |
lagergren@253 | 2674 | appendStatement(new ExecuteNode(unaryLine, unaryToken, finish, expr)); |
lagergren@253 | 2675 | return LiteralNode.newInstance(unaryToken, finish, true); |
lagergren@253 | 2676 | } |
jlaskey@3 | 2677 | case VOID: |
jlaskey@3 | 2678 | case TYPEOF: |
jlaskey@3 | 2679 | case ADD: |
jlaskey@3 | 2680 | case SUB: |
jlaskey@3 | 2681 | case BIT_NOT: |
jlaskey@3 | 2682 | case NOT: |
jlaskey@3 | 2683 | next(); |
jlaskey@3 | 2684 | final Node expr = unaryExpression(); |
lagergren@252 | 2685 | return new UnaryNode(unaryToken, expr); |
jlaskey@3 | 2686 | |
jlaskey@3 | 2687 | case INCPREFIX: |
jlaskey@3 | 2688 | case DECPREFIX: |
jlaskey@3 | 2689 | final TokenType opType = type; |
jlaskey@3 | 2690 | next(); |
jlaskey@3 | 2691 | |
jlaskey@3 | 2692 | final Node lhs = leftHandSideExpression(); |
jlaskey@3 | 2693 | // ++, -- without operand.. |
jlaskey@3 | 2694 | if (lhs == null) { |
jlaskey@3 | 2695 | // error would have been issued when looking for 'lhs' |
jlaskey@3 | 2696 | return null; |
jlaskey@3 | 2697 | } |
jlaskey@3 | 2698 | if (!(lhs instanceof AccessNode || |
jlaskey@3 | 2699 | lhs instanceof IndexNode || |
jlaskey@3 | 2700 | lhs instanceof IdentNode)) { |
jlaskey@3 | 2701 | return referenceError(lhs, null); |
jlaskey@3 | 2702 | } |
jlaskey@3 | 2703 | |
jlaskey@3 | 2704 | if (lhs instanceof IdentNode) { |
lagergren@137 | 2705 | if (!checkIdentLValue((IdentNode)lhs)) { |
jlaskey@3 | 2706 | return referenceError(lhs, null); |
jlaskey@3 | 2707 | } |
jlaskey@3 | 2708 | verifyStrictIdent((IdentNode)lhs, "operand for " + opType.getName() + " operator"); |
jlaskey@3 | 2709 | } |
jlaskey@3 | 2710 | |
jlaskey@3 | 2711 | return incDecExpression(unaryToken, opType, lhs, false); |
jlaskey@3 | 2712 | |
jlaskey@3 | 2713 | default: |
jlaskey@3 | 2714 | break; |
jlaskey@3 | 2715 | } |
jlaskey@3 | 2716 | |
jlaskey@3 | 2717 | Node expression = leftHandSideExpression(); |
jlaskey@3 | 2718 | |
jlaskey@3 | 2719 | if (last != EOL) { |
jlaskey@3 | 2720 | switch (type) { |
jlaskey@3 | 2721 | case INCPREFIX: |
jlaskey@3 | 2722 | case DECPREFIX: |
jlaskey@3 | 2723 | final TokenType opType = type; |
jlaskey@3 | 2724 | final Node lhs = expression; |
jlaskey@3 | 2725 | if (!(lhs instanceof AccessNode || |
jlaskey@3 | 2726 | lhs instanceof IndexNode || |
jlaskey@3 | 2727 | lhs instanceof IdentNode)) { |
jlaskey@3 | 2728 | next(); |
jlaskey@3 | 2729 | return referenceError(lhs, null); |
jlaskey@3 | 2730 | } |
jlaskey@3 | 2731 | if (lhs instanceof IdentNode) { |
lagergren@137 | 2732 | if (!checkIdentLValue((IdentNode)lhs)) { |
jlaskey@3 | 2733 | next(); |
jlaskey@3 | 2734 | return referenceError(lhs, null); |
jlaskey@3 | 2735 | } |
jlaskey@3 | 2736 | verifyStrictIdent((IdentNode)lhs, "operand for " + opType.getName() + " operator"); |
jlaskey@3 | 2737 | } |
jlaskey@3 | 2738 | expression = incDecExpression(token, type, expression, true); |
jlaskey@3 | 2739 | next(); |
jlaskey@3 | 2740 | break; |
jlaskey@3 | 2741 | default: |
jlaskey@3 | 2742 | break; |
jlaskey@3 | 2743 | } |
jlaskey@3 | 2744 | } |
jlaskey@3 | 2745 | |
jlaskey@3 | 2746 | if (expression == null) { |
lagergren@211 | 2747 | throw error(AbstractParser.message("expected.operand", type.getNameOrType())); |
jlaskey@3 | 2748 | } |
jlaskey@3 | 2749 | |
jlaskey@3 | 2750 | return expression; |
jlaskey@3 | 2751 | } |
jlaskey@3 | 2752 | |
jlaskey@3 | 2753 | /** |
jlaskey@3 | 2754 | * MultiplicativeExpression : |
jlaskey@3 | 2755 | * UnaryExpression |
jlaskey@3 | 2756 | * MultiplicativeExpression * UnaryExpression |
jlaskey@3 | 2757 | * MultiplicativeExpression / UnaryExpression |
jlaskey@3 | 2758 | * MultiplicativeExpression % UnaryExpression |
jlaskey@3 | 2759 | * |
jlaskey@3 | 2760 | * See 11.5 |
jlaskey@3 | 2761 | * |
jlaskey@3 | 2762 | * AdditiveExpression : |
jlaskey@3 | 2763 | * MultiplicativeExpression |
jlaskey@3 | 2764 | * AdditiveExpression + MultiplicativeExpression |
jlaskey@3 | 2765 | * AdditiveExpression - MultiplicativeExpression |
jlaskey@3 | 2766 | * |
jlaskey@3 | 2767 | * See 11.6 |
jlaskey@3 | 2768 | * |
jlaskey@3 | 2769 | * ShiftExpression : |
jlaskey@3 | 2770 | * AdditiveExpression |
jlaskey@3 | 2771 | * ShiftExpression << AdditiveExpression |
jlaskey@3 | 2772 | * ShiftExpression >> AdditiveExpression |
jlaskey@3 | 2773 | * ShiftExpression >>> AdditiveExpression |
jlaskey@3 | 2774 | * |
jlaskey@3 | 2775 | * See 11.7 |
jlaskey@3 | 2776 | * |
jlaskey@3 | 2777 | * RelationalExpression : |
jlaskey@3 | 2778 | * ShiftExpression |
jlaskey@3 | 2779 | * RelationalExpression < ShiftExpression |
jlaskey@3 | 2780 | * RelationalExpression > ShiftExpression |
jlaskey@3 | 2781 | * RelationalExpression <= ShiftExpression |
jlaskey@3 | 2782 | * RelationalExpression >= ShiftExpression |
jlaskey@3 | 2783 | * RelationalExpression instanceof ShiftExpression |
jlaskey@3 | 2784 | * RelationalExpression in ShiftExpression // if !noIf |
jlaskey@3 | 2785 | * |
jlaskey@3 | 2786 | * See 11.8 |
jlaskey@3 | 2787 | * |
jlaskey@3 | 2788 | * RelationalExpression |
jlaskey@3 | 2789 | * EqualityExpression == RelationalExpression |
jlaskey@3 | 2790 | * EqualityExpression != RelationalExpression |
jlaskey@3 | 2791 | * EqualityExpression === RelationalExpression |
jlaskey@3 | 2792 | * EqualityExpression !== RelationalExpression |
jlaskey@3 | 2793 | * |
jlaskey@3 | 2794 | * See 11.9 |
jlaskey@3 | 2795 | * |
jlaskey@3 | 2796 | * BitwiseANDExpression : |
jlaskey@3 | 2797 | * EqualityExpression |
jlaskey@3 | 2798 | * BitwiseANDExpression & EqualityExpression |
jlaskey@3 | 2799 | * |
jlaskey@3 | 2800 | * BitwiseXORExpression : |
jlaskey@3 | 2801 | * BitwiseANDExpression |
jlaskey@3 | 2802 | * BitwiseXORExpression ^ BitwiseANDExpression |
jlaskey@3 | 2803 | * |
jlaskey@3 | 2804 | * BitwiseORExpression : |
jlaskey@3 | 2805 | * BitwiseXORExpression |
jlaskey@3 | 2806 | * BitwiseORExpression | BitwiseXORExpression |
jlaskey@3 | 2807 | * |
jlaskey@3 | 2808 | * See 11.10 |
jlaskey@3 | 2809 | * |
jlaskey@3 | 2810 | * LogicalANDExpression : |
jlaskey@3 | 2811 | * BitwiseORExpression |
jlaskey@3 | 2812 | * LogicalANDExpression && BitwiseORExpression |
jlaskey@3 | 2813 | * |
jlaskey@3 | 2814 | * LogicalORExpression : |
jlaskey@3 | 2815 | * LogicalANDExpression |
jlaskey@3 | 2816 | * LogicalORExpression || LogicalANDExpression |
jlaskey@3 | 2817 | * |
jlaskey@3 | 2818 | * See 11.11 |
jlaskey@3 | 2819 | * |
jlaskey@3 | 2820 | * ConditionalExpression : |
jlaskey@3 | 2821 | * LogicalORExpression |
jlaskey@3 | 2822 | * LogicalORExpression ? AssignmentExpression : AssignmentExpression |
jlaskey@3 | 2823 | * |
jlaskey@3 | 2824 | * See 11.12 |
jlaskey@3 | 2825 | * |
jlaskey@3 | 2826 | * AssignmentExpression : |
jlaskey@3 | 2827 | * ConditionalExpression |
jlaskey@3 | 2828 | * LeftHandSideExpression AssignmentOperator AssignmentExpression |
jlaskey@3 | 2829 | * |
jlaskey@3 | 2830 | * AssignmentOperator : |
jlaskey@3 | 2831 | * = *= /= %= += -= <<= >>= >>>= &= ^= |= |
jlaskey@3 | 2832 | * |
jlaskey@3 | 2833 | * See 11.13 |
jlaskey@3 | 2834 | * |
jlaskey@3 | 2835 | * Expression : |
jlaskey@3 | 2836 | * AssignmentExpression |
jlaskey@3 | 2837 | * Expression , AssignmentExpression |
jlaskey@3 | 2838 | * |
jlaskey@3 | 2839 | * See 11.14 |
jlaskey@3 | 2840 | * |
jlaskey@3 | 2841 | * Parse expression. |
jlaskey@3 | 2842 | * @return Expression node. |
jlaskey@3 | 2843 | */ |
jlaskey@3 | 2844 | private Node expression() { |
jlaskey@3 | 2845 | // TODO - Destructuring array. |
jlaskey@3 | 2846 | // Include commas in expression parsing. |
jlaskey@3 | 2847 | return expression(unaryExpression(), COMMARIGHT.getPrecedence(), false); |
jlaskey@3 | 2848 | } |
lagergren@211 | 2849 | |
jlaskey@3 | 2850 | private Node expression(final Node exprLhs, final int minPrecedence, final boolean noIn) { |
jlaskey@3 | 2851 | // Get the precedence of the next operator. |
jlaskey@3 | 2852 | int precedence = type.getPrecedence(); |
jlaskey@3 | 2853 | Node lhs = exprLhs; |
jlaskey@3 | 2854 | |
jlaskey@3 | 2855 | // While greater precedence. |
jlaskey@3 | 2856 | while (type.isOperator(noIn) && precedence >= minPrecedence) { |
jlaskey@3 | 2857 | // Capture the operator token. |
jlaskey@3 | 2858 | final long op = token; |
jlaskey@3 | 2859 | |
jlaskey@3 | 2860 | if (type == TERNARY) { |
jlaskey@3 | 2861 | // Skip operator. |
jlaskey@3 | 2862 | next(); |
jlaskey@3 | 2863 | |
jlaskey@3 | 2864 | // Pass expression. Middle expression of a conditional expression can be a "in" |
jlaskey@3 | 2865 | // expression - even in the contexts where "in" is not permitted. |
jlaskey@3 | 2866 | final Node rhs = expression(unaryExpression(), ASSIGN.getPrecedence(), false); |
jlaskey@3 | 2867 | |
jlaskey@3 | 2868 | expect(COLON); |
jlaskey@3 | 2869 | |
jlaskey@3 | 2870 | // Fail expression. |
jlaskey@3 | 2871 | final Node third = expression(unaryExpression(), ASSIGN.getPrecedence(), noIn); |
jlaskey@3 | 2872 | |
jlaskey@3 | 2873 | // Build up node. |
lagergren@252 | 2874 | lhs = new TernaryNode(op, lhs, rhs, third); |
jlaskey@3 | 2875 | } else { |
jlaskey@3 | 2876 | // Skip operator. |
jlaskey@3 | 2877 | next(); |
jlaskey@3 | 2878 | |
jlaskey@3 | 2879 | // Get the next primary expression. |
jlaskey@3 | 2880 | Node rhs = unaryExpression(); |
jlaskey@3 | 2881 | |
jlaskey@3 | 2882 | // Get precedence of next operator. |
jlaskey@3 | 2883 | int nextPrecedence = type.getPrecedence(); |
jlaskey@3 | 2884 | |
jlaskey@3 | 2885 | // Subtask greater precedence. |
jlaskey@3 | 2886 | while (type.isOperator(noIn) && |
jlaskey@3 | 2887 | (nextPrecedence > precedence || |
jlaskey@3 | 2888 | nextPrecedence == precedence && !type.isLeftAssociative())) { |
jlaskey@3 | 2889 | rhs = expression(rhs, nextPrecedence, noIn); |
jlaskey@3 | 2890 | nextPrecedence = type.getPrecedence(); |
jlaskey@3 | 2891 | } |
jlaskey@3 | 2892 | |
jlaskey@3 | 2893 | lhs = verifyAssignment(op, lhs, rhs); |
jlaskey@3 | 2894 | } |
jlaskey@3 | 2895 | |
jlaskey@3 | 2896 | precedence = type.getPrecedence(); |
jlaskey@3 | 2897 | } |
jlaskey@3 | 2898 | |
jlaskey@3 | 2899 | return lhs; |
jlaskey@3 | 2900 | } |
jlaskey@3 | 2901 | |
jlaskey@3 | 2902 | private Node assignmentExpression(final boolean noIn) { |
jlaskey@3 | 2903 | // TODO - Handle decompose. |
jlaskey@3 | 2904 | // Exclude commas in expression parsing. |
jlaskey@3 | 2905 | return expression(unaryExpression(), ASSIGN.getPrecedence(), noIn); |
jlaskey@3 | 2906 | } |
jlaskey@3 | 2907 | |
jlaskey@3 | 2908 | /** |
jlaskey@3 | 2909 | * Parse an end of line. |
jlaskey@3 | 2910 | */ |
jlaskey@3 | 2911 | private void endOfLine() { |
jlaskey@3 | 2912 | switch (type) { |
jlaskey@3 | 2913 | case SEMICOLON: |
jlaskey@3 | 2914 | case EOL: |
jlaskey@3 | 2915 | next(); |
jlaskey@3 | 2916 | break; |
jlaskey@3 | 2917 | case RPAREN: |
jlaskey@3 | 2918 | case RBRACKET: |
jlaskey@3 | 2919 | case RBRACE: |
jlaskey@3 | 2920 | case EOF: |
jlaskey@3 | 2921 | break; |
jlaskey@3 | 2922 | default: |
jlaskey@3 | 2923 | if (last != EOL) { |
jlaskey@3 | 2924 | expect(SEMICOLON); |
jlaskey@3 | 2925 | } |
jlaskey@3 | 2926 | break; |
jlaskey@3 | 2927 | } |
jlaskey@3 | 2928 | } |
jlaskey@3 | 2929 | |
lagergren@108 | 2930 | @Override |
lagergren@108 | 2931 | public String toString() { |
lagergren@108 | 2932 | return "[JavaScript Parsing]"; |
lagergren@108 | 2933 | } |
attila@144 | 2934 | |
attila@233 | 2935 | private static void markEval(final LexicalContext lc) { |
lagergren@211 | 2936 | final Iterator<FunctionNode> iter = lc.getFunctions(); |
lagergren@211 | 2937 | boolean flaggedCurrentFn = false; |
lagergren@211 | 2938 | while (iter.hasNext()) { |
lagergren@211 | 2939 | final FunctionNode fn = iter.next(); |
lagergren@211 | 2940 | if (!flaggedCurrentFn) { |
attila@233 | 2941 | lc.setFlag(fn, FunctionNode.HAS_EVAL); |
lagergren@211 | 2942 | flaggedCurrentFn = true; |
lagergren@211 | 2943 | } else { |
attila@233 | 2944 | lc.setFlag(fn, FunctionNode.HAS_NESTED_EVAL); |
lagergren@211 | 2945 | } |
lagergren@211 | 2946 | lc.setFlag(lc.getFunctionBody(fn), Block.NEEDS_SCOPE); |
lagergren@211 | 2947 | } |
attila@144 | 2948 | } |
attila@144 | 2949 | |
lagergren@253 | 2950 | private void prependStatement(final Statement statement) { |
lagergren@211 | 2951 | lc.prependStatement(statement); |
lagergren@211 | 2952 | } |
lagergren@211 | 2953 | |
lagergren@253 | 2954 | private void appendStatement(final Statement statement) { |
lagergren@211 | 2955 | lc.appendStatement(statement); |
attila@144 | 2956 | } |
jlaskey@3 | 2957 | } |