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| 1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file | |
| 2 // for details. All rights reserved. Use of this source code is governed by a | |
| 3 // BSD-style license that can be found in the LICENSE file. | |
| 4 | |
| 5 part of js; | |
| 6 | |
| 7 class TemplateManager { | |
| 8 Map<String, Template> expressionTemplates = new Map<String, Template>(); | |
| 9 Map<String, Template> statementTemplates = new Map<String, Template>(); | |
| 10 | |
| 11 TemplateManager(); | |
| 12 | |
| 13 // TODO(18886): Remove this function once the memory-leak in the VM is fixed. | |
| 14 void clear() { | |
| 15 expressionTemplates.clear(); | |
| 16 statementTemplates.clear(); | |
| 17 } | |
| 18 | |
| 19 Template lookupExpressionTemplate(String source) { | |
| 20 return expressionTemplates[source]; | |
| 21 } | |
| 22 | |
| 23 Template defineExpressionTemplate(String source, Node ast) { | |
| 24 Template template = | |
| 25 new Template(source, ast, isExpression: true, forceCopy: false); | |
| 26 expressionTemplates[source] = template; | |
| 27 return template; | |
| 28 } | |
| 29 | |
| 30 Template lookupStatementTemplate(String source) { | |
| 31 return statementTemplates[source]; | |
| 32 } | |
| 33 | |
| 34 Template defineStatementTemplate(String source, Node ast) { | |
| 35 Template template = | |
| 36 new Template(source, ast, isExpression: false, forceCopy: false); | |
| 37 statementTemplates[source] = template; | |
| 38 return template; | |
| 39 } | |
| 40 } | |
| 41 | |
| 42 /** | |
| 43 * A Template is created with JavaScript AST containing placeholders (interface | |
| 44 * InterpolatedNode). The [instantiate] method creates an AST that looks like | |
| 45 * the original with the placeholders replaced by the arguments to | |
| 46 * [instantiate]. | |
| 47 */ | |
| 48 class Template { | |
| 49 final String source; | |
| 50 final bool isExpression; | |
| 51 final bool forceCopy; | |
| 52 final Node ast; | |
| 53 | |
| 54 Instantiator instantiator; | |
| 55 int positionalArgumentCount = -1; | |
| 56 // TODO(sra): Named arguments. | |
| 57 | |
| 58 Template(this.source, this.ast, | |
| 59 {this.isExpression: true, this.forceCopy: false}) { | |
| 60 _compile(); | |
| 61 } | |
| 62 | |
| 63 Template.withExpressionResult(this.ast) | |
| 64 : source = null, isExpression = true, forceCopy = false { | |
| 65 assert(ast is Expression); | |
| 66 assert(_checkNoPlaceholders()); | |
| 67 positionalArgumentCount = 0; | |
| 68 instantiator = (arguments) => ast; | |
| 69 } | |
| 70 | |
| 71 Template.withStatementResult(this.ast) | |
| 72 : source = null, isExpression = false, forceCopy = false { | |
| 73 assert(ast is Statement); | |
| 74 assert(_checkNoPlaceholders()); | |
| 75 positionalArgumentCount = 0; | |
| 76 instantiator = (arguments) => ast; | |
| 77 } | |
| 78 | |
| 79 bool _checkNoPlaceholders() { | |
| 80 InstantiatorGeneratorVisitor generator = | |
| 81 new InstantiatorGeneratorVisitor(false); | |
| 82 generator.compile(ast); | |
| 83 return generator.analysis.count == 0; | |
| 84 } | |
| 85 | |
| 86 void _compile() { | |
| 87 InstantiatorGeneratorVisitor generator = | |
| 88 new InstantiatorGeneratorVisitor(forceCopy); | |
| 89 instantiator = generator.compile(ast); | |
| 90 positionalArgumentCount = generator.analysis.count; | |
| 91 } | |
| 92 | |
| 93 Node instantiate(List arguments) { | |
| 94 if (arguments is List) { | |
| 95 if (arguments.length != positionalArgumentCount) { | |
| 96 throw 'Wrong number of template arguments, given ${arguments.length}, ' | |
| 97 'expected $positionalArgumentCount'; | |
| 98 } | |
| 99 return instantiator(arguments); | |
| 100 } | |
| 101 // TODO(sra): Add named placeholders and a Map of arguments. | |
| 102 throw new UnimplementedError('Template arguments must be a list'); | |
| 103 } | |
| 104 } | |
| 105 | |
| 106 /** | |
| 107 * An Instantiator is a Function that generates a JS AST tree or List of | |
| 108 * trees. [arguments] is a List for positional templates, or (TODO) Map for | |
| 109 * named templates. | |
| 110 */ | |
| 111 typedef Node Instantiator(var arguments); | |
| 112 | |
| 113 | |
| 114 /** | |
| 115 * InstantiatorGeneratorVisitor compiles a template. This class compiles a tree | |
| 116 * containing [InterpolatedNode]s into a function that will create a copy of the | |
| 117 * tree with the interpolated nodes substituted with provided values. | |
| 118 */ | |
| 119 class InstantiatorGeneratorVisitor implements NodeVisitor<Instantiator> { | |
| 120 | |
| 121 final bool forceCopy; | |
| 122 | |
| 123 InterpolatedNodeAnalysis analysis = new InterpolatedNodeAnalysis(); | |
| 124 | |
| 125 /** | |
| 126 * The entire tree is cloned if [forceCopy] is true. | |
| 127 */ | |
| 128 InstantiatorGeneratorVisitor(this.forceCopy); | |
| 129 | |
| 130 Instantiator compile(Node node) { | |
| 131 analysis.visit(node); | |
| 132 Instantiator result = visit(node); | |
| 133 return result; | |
| 134 } | |
| 135 | |
| 136 static error(String message) { | |
| 137 throw message; | |
| 138 } | |
| 139 | |
| 140 static Instantiator same(Node node) => (arguments) => node; | |
| 141 static Node makeNull(arguments) => null; | |
| 142 | |
| 143 Instantiator visit(Node node) { | |
| 144 if (forceCopy || analysis.containsInterpolatedNodes(node)) { | |
| 145 return node.accept(this); | |
| 146 } | |
| 147 return same(node); | |
| 148 } | |
| 149 | |
| 150 Instantiator visitNullable(Node node) { | |
| 151 if (node == null) return makeNull; | |
| 152 return visit(node); | |
| 153 } | |
| 154 | |
| 155 Instantiator visitSplayable(Node node) { | |
| 156 // TODO(sra): Process immediate [InterpolatedNode]s, permitting splaying. | |
| 157 return visit(node); | |
| 158 } | |
| 159 | |
| 160 Instantiator visitNode(Node node) { | |
| 161 throw 'Unimplemented InstantiatorGeneratorVisitor for $node'; | |
| 162 } | |
| 163 | |
| 164 static RegExp identiferRE = new RegExp(r'^[A-Za-z_$][A-Za-z_$0-9]*$'); | |
| 165 | |
| 166 static Expression convertStringToVariableUse(String value) { | |
| 167 assert(identiferRE.hasMatch(value)); | |
| 168 return new VariableUse(value); | |
| 169 } | |
| 170 | |
| 171 Instantiator visitInterpolatedExpression(InterpolatedExpression node) { | |
| 172 int position = node.name; | |
| 173 return (arguments) { | |
| 174 var value = arguments[position]; | |
| 175 if (value is Expression) return value; | |
| 176 if (value is String) return convertStringToVariableUse(value);; | |
| 177 error('Interpolated value #$position is not an Expression: $value'); | |
| 178 }; | |
| 179 } | |
| 180 | |
| 181 Instantiator visitSplayableExpression(Node node) { | |
| 182 if (node is InterpolatedExpression) { | |
| 183 int position = node.name; | |
| 184 return (arguments) { | |
| 185 var value = arguments[position]; | |
| 186 Expression toExpression(item) { | |
| 187 if (item is Expression) return item; | |
| 188 if (item is String) return convertStringToVariableUse(item); | |
| 189 return error('Interpolated value #$position is not ' | |
| 190 'an Expression or List of Expressions: $value'); | |
| 191 } | |
| 192 if (value is Iterable) return value.map(toExpression); | |
| 193 return toExpression(value); | |
| 194 }; | |
| 195 } | |
| 196 return visit(node); | |
| 197 } | |
| 198 | |
| 199 Instantiator visitInterpolatedLiteral(InterpolatedLiteral node) { | |
| 200 int position = node.name; | |
| 201 return (arguments) { | |
| 202 var value = arguments[position]; | |
| 203 if (value is Literal) return value; | |
| 204 error('Interpolated value #$position is not a Literal: $value'); | |
| 205 }; | |
| 206 } | |
| 207 | |
| 208 Instantiator visitInterpolatedParameter(InterpolatedParameter node) { | |
| 209 int position = node.name; | |
| 210 return (arguments) { | |
| 211 var value = arguments[position]; | |
| 212 | |
| 213 Parameter toParameter(item) { | |
| 214 if (item is Parameter) return item; | |
| 215 if (item is String) return new Parameter(item); | |
| 216 return error('Interpolated value #$position is not a Parameter or ' | |
| 217 'List of Parameters: $value'); | |
| 218 } | |
| 219 if (value is Iterable) return value.map(toParameter); | |
| 220 return toParameter(value); | |
| 221 }; | |
| 222 } | |
| 223 | |
| 224 Instantiator visitInterpolatedSelector(InterpolatedSelector node) { | |
| 225 // A selector is an expression, as in `a[selector]`. | |
| 226 // A String argument converted into a LiteralString, so `a.#` with argument | |
| 227 // 'foo' generates `a["foo"]` which prints as `a.foo`. | |
| 228 int position = node.name; | |
| 229 return (arguments) { | |
| 230 var value = arguments[position]; | |
| 231 if (value is Expression) return value; | |
| 232 if (value is String) return new LiteralString('"$value"'); | |
| 233 error('Interpolated value #$position is not a selector: $value'); | |
| 234 }; | |
| 235 } | |
| 236 | |
| 237 Instantiator visitInterpolatedStatement(InterpolatedStatement node) { | |
| 238 int position = node.name; | |
| 239 return (arguments) { | |
| 240 var value = arguments[position]; | |
| 241 if (value is Node) return value.toStatement(); | |
| 242 error('Interpolated value #$position is not a Statement: $value'); | |
| 243 }; | |
| 244 } | |
| 245 | |
| 246 Instantiator visitSplayableStatement(Node node) { | |
| 247 if (node is InterpolatedStatement) { | |
| 248 int position = node.name; | |
| 249 return (arguments) { | |
| 250 var value = arguments[position]; | |
| 251 Statement toStatement(item) { | |
| 252 if (item is Statement) return item; | |
| 253 if (item is Expression) return item.toStatement();; | |
| 254 return error('Interpolated value #$position is not ' | |
| 255 'a Statement or List of Statements: $value'); | |
| 256 } | |
| 257 if (value is Iterable) return value.map(toStatement); | |
| 258 return toStatement(value); | |
| 259 }; | |
| 260 } | |
| 261 return visit(node); | |
| 262 } | |
| 263 | |
| 264 Instantiator visitProgram(Program node) { | |
| 265 List instantiators = node.body.map(visitSplayableStatement).toList(); | |
| 266 return (arguments) { | |
| 267 List<Statement> statements = <Statement>[]; | |
| 268 void add(node) { | |
| 269 if (node is EmptyStatement) return; | |
| 270 if (node is Iterable) { | |
| 271 statements.addAll(node); | |
| 272 } else { | |
| 273 statements.add(node.toStatement()); | |
| 274 } | |
| 275 } | |
| 276 for (Instantiator instantiator in instantiators) { | |
| 277 add(instantiator(arguments)); | |
| 278 } | |
| 279 return new Program(statements); | |
| 280 }; | |
| 281 } | |
| 282 | |
| 283 Instantiator visitBlock(Block node) { | |
| 284 List instantiators = node.statements.map(visitSplayableStatement).toList(); | |
| 285 return (arguments) { | |
| 286 List<Statement> statements = <Statement>[]; | |
| 287 void add(node) { | |
| 288 if (node is EmptyStatement) return; | |
| 289 if (node is Iterable) { | |
| 290 statements.addAll(node); | |
| 291 } else if (node is Block) { | |
| 292 statements.addAll(node.statements); | |
| 293 } else { | |
| 294 statements.add(node.toStatement()); | |
| 295 } | |
| 296 } | |
| 297 for (Instantiator instantiator in instantiators) { | |
| 298 add(instantiator(arguments)); | |
| 299 } | |
| 300 return new Block(statements); | |
| 301 }; | |
| 302 } | |
| 303 | |
| 304 Instantiator visitExpressionStatement(ExpressionStatement node) { | |
| 305 Instantiator buildExpression = visit(node.expression); | |
| 306 return (arguments) { | |
| 307 return buildExpression(arguments).toStatement(); | |
| 308 }; | |
| 309 } | |
| 310 | |
| 311 Instantiator visitEmptyStatement(EmptyStatement node) => | |
| 312 (arguments) => new EmptyStatement(); | |
| 313 | |
| 314 Instantiator visitIf(If node) { | |
| 315 if (node.condition is InterpolatedExpression) { | |
| 316 return visitIfConditionalCompilation(node); | |
| 317 } else { | |
| 318 return visitIfNormal(node); | |
| 319 } | |
| 320 } | |
| 321 | |
| 322 Instantiator visitIfConditionalCompilation(If node) { | |
| 323 // Special version of visitInterpolatedExpression that permits bools. | |
| 324 compileCondition(InterpolatedExpression node) { | |
| 325 int position = node.name; | |
| 326 return (arguments) { | |
| 327 var value = arguments[position]; | |
| 328 if (value is bool) return value; | |
| 329 if (value is Expression) return value; | |
| 330 if (value is String) return convertStringToVariableUse(value);; | |
| 331 error('Interpolated value #$position is not an Expression: $value'); | |
| 332 }; | |
| 333 } | |
| 334 var makeCondition = compileCondition(node.condition); | |
| 335 Instantiator makeThen = visit(node.then); | |
| 336 Instantiator makeOtherwise = visit(node.otherwise); | |
| 337 return (arguments) { | |
| 338 var condition = makeCondition(arguments); | |
| 339 if (condition is bool) { | |
| 340 if (condition == true) { | |
| 341 return makeThen(arguments); | |
| 342 } else { | |
| 343 return makeOtherwise(arguments); | |
| 344 } | |
| 345 } | |
| 346 return new If( | |
| 347 condition, | |
| 348 makeThen(arguments), | |
| 349 makeOtherwise(arguments)); | |
| 350 }; | |
| 351 } | |
| 352 | |
| 353 Instantiator visitIfNormal(If node) { | |
| 354 Instantiator makeCondition = visit(node.condition); | |
| 355 Instantiator makeThen = visit(node.then); | |
| 356 Instantiator makeOtherwise = visit(node.otherwise); | |
| 357 return (arguments) { | |
| 358 return new If( | |
| 359 makeCondition(arguments), | |
| 360 makeThen(arguments), | |
| 361 makeOtherwise(arguments)); | |
| 362 }; | |
| 363 } | |
| 364 | |
| 365 Instantiator visitFor(For node) { | |
| 366 Instantiator makeInit = visitNullable(node.init); | |
| 367 Instantiator makeCondition = visitNullable(node.condition); | |
| 368 Instantiator makeUpdate = visitNullable(node.update); | |
| 369 Instantiator makeBody = visit(node.body); | |
| 370 return (arguments) { | |
| 371 return new For( | |
| 372 makeInit(arguments), makeCondition(arguments), makeUpdate(arguments), | |
| 373 makeBody(arguments)); | |
| 374 }; | |
| 375 } | |
| 376 | |
| 377 Instantiator visitForIn(ForIn node) { | |
| 378 Instantiator makeLeftHandSide = visit(node.leftHandSide); | |
| 379 Instantiator makeObject = visit(node.object); | |
| 380 Instantiator makeBody = visit(node.body); | |
| 381 return (arguments) { | |
| 382 return new ForIn( | |
| 383 makeLeftHandSide(arguments), | |
| 384 makeObject(arguments), | |
| 385 makeBody(arguments)); | |
| 386 }; | |
| 387 } | |
| 388 | |
| 389 TODO(String name) { | |
| 390 throw new UnimplementedError('$this.$name'); | |
| 391 } | |
| 392 | |
| 393 Instantiator visitWhile(While node) => TODO('visitWhile'); | |
| 394 Instantiator visitDo(Do node) => TODO('visitDo'); | |
| 395 | |
| 396 Instantiator visitContinue(Continue node) => | |
| 397 (arguments) => new Continue(node.targetLabel); | |
| 398 | |
| 399 Instantiator visitBreak(Break node) => | |
| 400 (arguments) => new Break(node.targetLabel); | |
| 401 | |
| 402 Instantiator visitReturn(Return node) { | |
| 403 Instantiator makeExpression = visitNullable(node.value); | |
| 404 return (arguments) => new Return(makeExpression(arguments)); | |
| 405 } | |
| 406 | |
| 407 Instantiator visitThrow(Throw node) { | |
| 408 Instantiator makeExpression = visit(node.expression); | |
| 409 return (arguments) => new Throw(makeExpression(arguments)); | |
| 410 } | |
| 411 | |
| 412 | |
| 413 Instantiator visitTry(Try node) { | |
| 414 Instantiator makeBody = visit(node.body); | |
| 415 Instantiator makeCatch = visitNullable(node.catchPart); | |
| 416 Instantiator makeFinally = visitNullable(node.finallyPart); | |
| 417 return (arguments) => new Try( | |
| 418 makeBody(arguments), makeCatch(arguments), makeFinally(arguments)); | |
| 419 } | |
| 420 | |
| 421 Instantiator visitCatch(Catch node) { | |
| 422 Instantiator makeDeclaration = visit(node.declaration); | |
| 423 Instantiator makeBody = visit(node.body); | |
| 424 return (arguments) => new Catch( | |
| 425 makeDeclaration(arguments), makeBody(arguments)); | |
| 426 } | |
| 427 | |
| 428 Instantiator visitSwitch(Switch node) => TODO('visitSwitch'); | |
| 429 Instantiator visitCase(Case node) => TODO('visitCase'); | |
| 430 Instantiator visitDefault(Default node) => TODO('visitDefault'); | |
| 431 | |
| 432 Instantiator visitFunctionDeclaration(FunctionDeclaration node) { | |
| 433 Instantiator makeName = visit(node.name); | |
| 434 Instantiator makeFunction = visit(node.function); | |
| 435 return (arguments) => | |
| 436 new FunctionDeclaration(makeName(arguments), makeFunction(arguments)); | |
| 437 } | |
| 438 | |
| 439 Instantiator visitLabeledStatement(LabeledStatement node) => | |
| 440 TODO('visitLabeledStatement'); | |
| 441 Instantiator visitLiteralStatement(LiteralStatement node) => | |
| 442 TODO('visitLiteralStatement'); | |
| 443 Instantiator visitBlob(Blob node) => | |
| 444 TODO('visitBlob'); | |
| 445 Instantiator visitLiteralExpression(LiteralExpression node) => | |
| 446 TODO('visitLiteralExpression'); | |
| 447 | |
| 448 Instantiator visitVariableDeclarationList(VariableDeclarationList node) { | |
| 449 List<Instantiator> declarationMakers = | |
| 450 node.declarations.map(visit).toList(); | |
| 451 return (arguments) { | |
| 452 List<VariableInitialization> declarations = <VariableInitialization>[]; | |
| 453 for (Instantiator instantiator in declarationMakers) { | |
| 454 var result = instantiator(arguments); | |
| 455 declarations.add(result); | |
| 456 } | |
| 457 return new VariableDeclarationList(declarations); | |
| 458 }; | |
| 459 } | |
| 460 | |
| 461 Instantiator visitAssignment(Assignment node) { | |
| 462 Instantiator makeLeftHandSide = visit(node.leftHandSide); | |
| 463 String op = node.op; | |
| 464 Instantiator makeValue = visitNullable(node.value); | |
| 465 return (arguments) { | |
| 466 return new Assignment.compound( | |
| 467 makeLeftHandSide(arguments), | |
| 468 op, | |
| 469 makeValue(arguments)); | |
| 470 }; | |
| 471 } | |
| 472 | |
| 473 Instantiator visitVariableInitialization(VariableInitialization node) { | |
| 474 Instantiator makeDeclaration = visit(node.declaration); | |
| 475 Instantiator makeValue = visitNullable(node.value); | |
| 476 return (arguments) { | |
| 477 return new VariableInitialization( | |
| 478 makeDeclaration(arguments), makeValue(arguments)); | |
| 479 }; | |
| 480 } | |
| 481 | |
| 482 Instantiator visitConditional(Conditional cond) { | |
| 483 Instantiator makeCondition = visit(cond.condition); | |
| 484 Instantiator makeThen = visit(cond.then); | |
| 485 Instantiator makeOtherwise = visit(cond.otherwise); | |
| 486 return (arguments) => new Conditional( | |
| 487 makeCondition(arguments), | |
| 488 makeThen(arguments), | |
| 489 makeOtherwise(arguments)); | |
| 490 } | |
| 491 | |
| 492 Instantiator visitNew(New node) => | |
| 493 handleCallOrNew(node, (target, arguments) => new New(target, arguments)); | |
| 494 | |
| 495 Instantiator visitCall(Call node) => | |
| 496 handleCallOrNew(node, (target, arguments) => new Call(target, arguments)); | |
| 497 | |
| 498 Instantiator handleCallOrNew(Call node, finish(target, arguments)) { | |
| 499 Instantiator makeTarget = visit(node.target); | |
| 500 Iterable<Instantiator> argumentMakers = | |
| 501 node.arguments.map(visitSplayableExpression).toList(); | |
| 502 | |
| 503 // TODO(sra): Avoid copying call arguments if no interpolation or forced | |
| 504 // copying. | |
| 505 return (arguments) { | |
| 506 Node target = makeTarget(arguments); | |
| 507 List<Expression> callArguments = <Expression>[]; | |
| 508 for (Instantiator instantiator in argumentMakers) { | |
| 509 var result = instantiator(arguments); | |
| 510 if (result is Iterable) { | |
| 511 callArguments.addAll(result); | |
| 512 } else { | |
| 513 callArguments.add(result); | |
| 514 } | |
| 515 } | |
| 516 return finish(target, callArguments.toList(growable: false)); | |
| 517 }; | |
| 518 } | |
| 519 | |
| 520 Instantiator visitBinary(Binary node) { | |
| 521 Instantiator makeLeft = visit(node.left); | |
| 522 Instantiator makeRight = visit(node.right); | |
| 523 String op = node.op; | |
| 524 return (arguments) => | |
| 525 new Binary(op, makeLeft(arguments), makeRight(arguments)); | |
| 526 } | |
| 527 | |
| 528 Instantiator visitPrefix(Prefix node) { | |
| 529 Instantiator makeOperand = visit(node.argument); | |
| 530 String op = node.op; | |
| 531 return (arguments) => new Prefix(op, makeOperand(arguments)); | |
| 532 } | |
| 533 | |
| 534 Instantiator visitPostfix(Postfix node) { | |
| 535 Instantiator makeOperand = visit(node.argument); | |
| 536 String op = node.op; | |
| 537 return (arguments) => new Postfix(op, makeOperand(arguments)); | |
| 538 } | |
| 539 | |
| 540 Instantiator visitVariableUse(VariableUse node) => | |
| 541 (arguments) => new VariableUse(node.name); | |
| 542 | |
| 543 Instantiator visitThis(This node) => (arguments) => new This(); | |
| 544 | |
| 545 Instantiator visitVariableDeclaration(VariableDeclaration node) => | |
| 546 (arguments) => new VariableDeclaration(node.name); | |
| 547 | |
| 548 Instantiator visitParameter(Parameter node) => | |
| 549 (arguments) => new Parameter(node.name); | |
| 550 | |
| 551 Instantiator visitAccess(PropertyAccess node) { | |
| 552 Instantiator makeReceiver = visit(node.receiver); | |
| 553 Instantiator makeSelector = visit(node.selector); | |
| 554 return (arguments) => | |
| 555 new PropertyAccess(makeReceiver(arguments), makeSelector(arguments)); | |
| 556 } | |
| 557 | |
| 558 Instantiator visitNamedFunction(NamedFunction node) { | |
| 559 Instantiator makeDeclaration = visit(node.name); | |
| 560 Instantiator makeFunction = visit(node.function); | |
| 561 return (arguments) => | |
| 562 new NamedFunction(makeDeclaration(arguments), makeFunction(arguments)); | |
| 563 } | |
| 564 | |
| 565 Instantiator visitFun(Fun node) { | |
| 566 List<Instantiator> paramMakers = node.params.map(visitSplayable).toList(); | |
| 567 Instantiator makeBody = visit(node.body); | |
| 568 // TODO(sra): Avoid copying params if no interpolation or forced copying. | |
| 569 return (arguments) { | |
| 570 List<Parameter> params = <Parameter>[]; | |
| 571 for (Instantiator instantiator in paramMakers) { | |
| 572 var result = instantiator(arguments); | |
| 573 if (result is Iterable) { | |
| 574 params.addAll(result); | |
| 575 } else { | |
| 576 params.add(result); | |
| 577 } | |
| 578 } | |
| 579 Statement body = makeBody(arguments); | |
| 580 return new Fun(params, body); | |
| 581 }; | |
| 582 } | |
| 583 | |
| 584 Instantiator visitLiteralBool(LiteralBool node) => | |
| 585 (arguments) => new LiteralBool(node.value); | |
| 586 | |
| 587 Instantiator visitLiteralString(LiteralString node) => | |
| 588 (arguments) => new LiteralString(node.value); | |
| 589 | |
| 590 Instantiator visitLiteralNumber(LiteralNumber node) => | |
| 591 (arguments) => new LiteralNumber(node.value); | |
| 592 | |
| 593 Instantiator visitLiteralNull(LiteralNull node) => | |
| 594 (arguments) => new LiteralNull(); | |
| 595 | |
| 596 Instantiator visitArrayInitializer(ArrayInitializer node) { | |
| 597 // Assume array has no missing elements. | |
| 598 // TODO(sra): Implement splicing? | |
| 599 List<Instantiator> elementMakers = node.elements | |
| 600 .map((ArrayElement element) => visit(element.value)) | |
| 601 .toList(); | |
| 602 return (arguments) { | |
| 603 List<ArrayElement> elements = <ArrayElement>[]; | |
| 604 void add(Expression value) { | |
| 605 elements.add(new ArrayElement(elements.length, value)); | |
| 606 } | |
| 607 for (Instantiator instantiator in elementMakers) { | |
| 608 var result = instantiator(arguments); | |
| 609 add(result); | |
| 610 } | |
| 611 return new ArrayInitializer(elements.length, elements); | |
| 612 }; | |
| 613 } | |
| 614 | |
| 615 Instantiator visitArrayElement(ArrayElement node) { | |
| 616 throw 'Should not get here'; // Handled in visitArrayInitializer. | |
| 617 } | |
| 618 | |
| 619 Instantiator visitObjectInitializer(ObjectInitializer node) { | |
| 620 List<Instantiator> propertyMakers = | |
| 621 node.properties.map(visitSplayable).toList(); | |
| 622 bool isOneLiner = node.isOneLiner; | |
| 623 return (arguments) { | |
| 624 List<Property> properties = <Property>[]; | |
| 625 for (Instantiator instantiator in propertyMakers) { | |
| 626 var result = instantiator(arguments); | |
| 627 if (result is Iterable) { | |
| 628 properties.addAll(result); | |
| 629 } else { | |
| 630 properties.add(result); | |
| 631 } | |
| 632 } | |
| 633 return new ObjectInitializer(properties, isOneLiner: isOneLiner); | |
| 634 }; | |
| 635 } | |
| 636 | |
| 637 Instantiator visitProperty(Property node) { | |
| 638 Instantiator makeName = visit(node.name); | |
| 639 Instantiator makeValue = visit(node.value); | |
| 640 return (arguments) { | |
| 641 return new Property(makeName(arguments), makeValue(arguments)); | |
| 642 }; | |
| 643 } | |
| 644 | |
| 645 Instantiator visitRegExpLiteral(RegExpLiteral node) => | |
| 646 (arguments) => new RegExpLiteral(node.pattern); | |
| 647 | |
| 648 Instantiator visitComment(Comment node) => TODO('visitComment'); | |
| 649 } | |
| 650 | |
| 651 /** | |
| 652 * InterpolatedNodeAnalysis extract [InterpolatedNode]s from AST. | |
| 653 */ | |
| 654 class InterpolatedNodeAnalysis extends BaseVisitor { | |
| 655 final Set<Node> containsInterpolatedNode = new Set<Node>(); | |
| 656 final List<InterpolatedNode> interpolatedNodes = <InterpolatedNode>[]; | |
| 657 int count = 0; | |
| 658 | |
| 659 InterpolatedNodeAnalysis(); | |
| 660 | |
| 661 bool containsInterpolatedNodes(Node node) => | |
| 662 containsInterpolatedNode.contains(node); | |
| 663 | |
| 664 void visit(Node node) { | |
| 665 node.accept(this); | |
| 666 } | |
| 667 | |
| 668 void visitNode(Node node) { | |
| 669 int before = count; | |
| 670 node.visitChildren(this); | |
| 671 if (count != before) containsInterpolatedNode.add(node); | |
| 672 return null; | |
| 673 } | |
| 674 | |
| 675 visitInterpolatedNode(InterpolatedNode node) { | |
| 676 interpolatedNodes.add(node); | |
| 677 containsInterpolatedNode.add(node); | |
| 678 ++count; | |
| 679 } | |
| 680 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 692513002:
Remove old dart2js code. (Closed)
Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart