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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_ast; | |
| 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 | |
| 14 Template lookupExpressionTemplate(String source) { | |
| 15 return expressionTemplates[source]; | |
| 16 } | |
| 17 | |
| 18 Template defineExpressionTemplate(String source, Node ast) { | |
| 19 Template template = | |
| 20 new Template(source, ast, isExpression: true, forceCopy: false); | |
| 21 expressionTemplates[source] = template; | |
| 22 return template; | |
| 23 } | |
| 24 | |
| 25 Template lookupStatementTemplate(String source) { | |
| 26 return statementTemplates[source]; | |
| 27 } | |
| 28 | |
| 29 Template defineStatementTemplate(String source, Node ast) { | |
| 30 Template template = | |
| 31 new Template(source, ast, isExpression: false, forceCopy: false); | |
| 32 statementTemplates[source] = template; | |
| 33 return template; | |
| 34 } | |
| 35 } | |
| 36 | |
| 37 /** | |
| 38 * A Template is created with JavaScript AST containing placeholders (interface | |
| 39 * InterpolatedNode). The [instantiate] method creates an AST that looks like | |
| 40 * the original with the placeholders replaced by the arguments to | |
| 41 * [instantiate]. | |
| 42 */ | |
| 43 class Template { | |
| 44 final String source; | |
| 45 final bool isExpression; | |
| 46 final bool forceCopy; | |
| 47 final Node ast; | |
| 48 | |
| 49 Instantiator instantiator; | |
| 50 | |
| 51 int positionalArgumentCount = -1; | |
| 52 | |
| 53 // Null, unless there are named holes. | |
| 54 List<String> holeNames; | |
| 55 bool get isPositional => holeNames == null; | |
| 56 | |
| 57 Template(this.source, this.ast, | |
| 58 {this.isExpression: true, this.forceCopy: false}) { | |
| 59 _compile(); | |
| 60 } | |
| 61 | |
| 62 Template.withExpressionResult(this.ast) | |
| 63 : source = null, isExpression = true, forceCopy = false { | |
| 64 assert(ast is Expression); | |
| 65 assert(_checkNoPlaceholders()); | |
| 66 positionalArgumentCount = 0; | |
| 67 instantiator = (arguments) => ast; | |
| 68 } | |
| 69 | |
| 70 Template.withStatementResult(this.ast) | |
| 71 : source = null, isExpression = false, forceCopy = false { | |
| 72 assert(ast is Statement); | |
| 73 assert(_checkNoPlaceholders()); | |
| 74 positionalArgumentCount = 0; | |
| 75 instantiator = (arguments) => ast; | |
| 76 } | |
| 77 | |
| 78 bool _checkNoPlaceholders() { | |
| 79 InstantiatorGeneratorVisitor generator = | |
| 80 new InstantiatorGeneratorVisitor(false); | |
| 81 generator.compile(ast); | |
| 82 return generator.analysis.count == 0; | |
| 83 } | |
| 84 | |
| 85 void _compile() { | |
| 86 InstantiatorGeneratorVisitor generator = | |
| 87 new InstantiatorGeneratorVisitor(forceCopy); | |
| 88 instantiator = generator.compile(ast); | |
| 89 positionalArgumentCount = generator.analysis.count; | |
| 90 Set<String> names = generator.analysis.holeNames; | |
| 91 holeNames = names.toList(growable:false); | |
| 92 } | |
| 93 | |
| 94 /// Instantiates the template with the given [arguments]. | |
| 95 /// | |
| 96 /// This method fills in the holes with the given arguments. The [arguments] | |
| 97 /// must be either a [List] or a [Map]. | |
| 98 Node instantiate(var arguments) { | |
| 99 if (arguments is List) { | |
| 100 if (arguments.length != positionalArgumentCount) { | |
| 101 throw 'Wrong number of template arguments, given ${arguments.length}, ' | |
| 102 'expected $positionalArgumentCount'; | |
| 103 } | |
| 104 return instantiator(arguments); | |
| 105 } | |
| 106 assert(arguments is Map); | |
| 107 if (holeNames.length < arguments.length) { | |
| 108 // This search is in O(n), but we only do it in case of an error, and the | |
| 109 // number of holes should be quite limited. | |
| 110 String unusedNames = | |
| 111 arguments.keys.where((name) => !holeNames.contains(name)).join(", "); | |
| 112 throw "Template arguments has unused mappings: $unusedNames"; | |
| 113 } | |
| 114 if (!holeNames.every((String name) => arguments.containsKey(name))) { | |
| 115 String notFound = | |
| 116 holeNames.where((name) => !arguments.containsKey(name)).join(", "); | |
| 117 throw "Template arguments is missing mappings for: $notFound"; | |
| 118 } | |
| 119 return instantiator(arguments); | |
| 120 } | |
| 121 } | |
| 122 | |
| 123 /** | |
| 124 * An Instantiator is a Function that generates a JS AST tree or List of | |
| 125 * trees. [arguments] is a List for positional templates, or Map for | |
| 126 * named templates. | |
| 127 */ | |
| 128 typedef Node Instantiator(var arguments); | |
| 129 | |
| 130 | |
| 131 /** | |
| 132 * InstantiatorGeneratorVisitor compiles a template. This class compiles a tree | |
| 133 * containing [InterpolatedNode]s into a function that will create a copy of the | |
| 134 * tree with the interpolated nodes substituted with provided values. | |
| 135 */ | |
| 136 class InstantiatorGeneratorVisitor implements NodeVisitor<Instantiator> { | |
| 137 | |
| 138 final bool forceCopy; | |
| 139 | |
| 140 InterpolatedNodeAnalysis analysis = new InterpolatedNodeAnalysis(); | |
| 141 | |
| 142 /** | |
| 143 * The entire tree is cloned if [forceCopy] is true. | |
| 144 */ | |
| 145 InstantiatorGeneratorVisitor(this.forceCopy); | |
| 146 | |
| 147 Instantiator compile(Node node) { | |
| 148 analysis.visit(node); | |
| 149 Instantiator result = visit(node); | |
| 150 return result; | |
| 151 } | |
| 152 | |
| 153 static error(String message) { | |
| 154 throw message; | |
| 155 } | |
| 156 | |
| 157 static Instantiator same(Node node) => (arguments) => node; | |
| 158 static Node makeNull(arguments) => null; | |
| 159 | |
| 160 Instantiator visit(Node node) { | |
| 161 if (forceCopy || analysis.containsInterpolatedNodes(node)) { | |
| 162 return node.accept(this); | |
| 163 } | |
| 164 return same(node); | |
| 165 } | |
| 166 | |
| 167 Instantiator visitNullable(Node node) { | |
| 168 if (node == null) return makeNull; | |
| 169 return visit(node); | |
| 170 } | |
| 171 | |
| 172 Instantiator visitSplayable(Node node) { | |
| 173 // TODO(sra): Process immediate [InterpolatedNode]s, permitting splaying. | |
| 174 return visit(node); | |
| 175 } | |
| 176 | |
| 177 Instantiator visitNode(Node node) { | |
| 178 throw 'Unimplemented InstantiatorGeneratorVisitor for $node'; | |
| 179 } | |
| 180 | |
| 181 static RegExp identiferRE = new RegExp(r'^[A-Za-z_$][A-Za-z_$0-9]*$'); | |
| 182 | |
| 183 static Expression convertStringToVariableUse(String value) { | |
| 184 assert(identiferRE.hasMatch(value)); | |
| 185 return new VariableUse(value); | |
| 186 } | |
| 187 | |
| 188 Instantiator visitInterpolatedExpression(InterpolatedExpression node) { | |
| 189 var nameOrPosition = node.nameOrPosition; | |
| 190 return (arguments) { | |
| 191 var value = arguments[nameOrPosition]; | |
| 192 if (value is Expression) return value; | |
| 193 if (value is String) return convertStringToVariableUse(value); | |
| 194 error('Interpolated value #$nameOrPosition is not an Expression: $value'); | |
| 195 }; | |
| 196 } | |
| 197 | |
| 198 Instantiator visitSplayableExpression(Node node) { | |
| 199 if (node is InterpolatedExpression) { | |
| 200 var nameOrPosition = node.nameOrPosition; | |
| 201 return (arguments) { | |
| 202 var value = arguments[nameOrPosition]; | |
| 203 Expression toExpression(item) { | |
| 204 if (item is Expression) return item; | |
| 205 if (item is String) return convertStringToVariableUse(item); | |
| 206 return error('Interpolated value #$nameOrPosition is not ' | |
| 207 'an Expression or List of Expressions: $value'); | |
| 208 } | |
| 209 if (value is Iterable) return value.map(toExpression); | |
| 210 return toExpression(value); | |
| 211 }; | |
| 212 } | |
| 213 return visit(node); | |
| 214 } | |
| 215 | |
| 216 Instantiator visitInterpolatedLiteral(InterpolatedLiteral node) { | |
| 217 var nameOrPosition = node.nameOrPosition; | |
| 218 return (arguments) { | |
| 219 var value = arguments[nameOrPosition]; | |
| 220 if (value is Literal) return value; | |
| 221 error('Interpolated value #$nameOrPosition is not a Literal: $value'); | |
| 222 }; | |
| 223 } | |
| 224 | |
| 225 Instantiator visitInterpolatedParameter(InterpolatedParameter node) { | |
| 226 var nameOrPosition = node.nameOrPosition; | |
| 227 return (arguments) { | |
| 228 var value = arguments[nameOrPosition]; | |
| 229 | |
| 230 Parameter toParameter(item) { | |
| 231 if (item is Parameter) return item; | |
| 232 if (item is String) return new Parameter(item); | |
| 233 return error('Interpolated value #$nameOrPosition is not a Parameter or' | |
| 234 ' List of Parameters: $value'); | |
| 235 } | |
| 236 if (value is Iterable) return value.map(toParameter); | |
| 237 return toParameter(value); | |
| 238 }; | |
| 239 } | |
| 240 | |
| 241 Instantiator visitInterpolatedSelector(InterpolatedSelector node) { | |
| 242 // A selector is an expression, as in `a[selector]`. | |
| 243 // A String argument converted into a LiteralString, so `a.#` with argument | |
| 244 // 'foo' generates `a["foo"]` which prints as `a.foo`. | |
| 245 var nameOrPosition = node.nameOrPosition; | |
| 246 return (arguments) { | |
| 247 var value = arguments[nameOrPosition]; | |
| 248 if (value is Expression) return value; | |
| 249 if (value is String) return new LiteralString('"$value"'); | |
| 250 error('Interpolated value #$nameOrPosition is not a selector: $value'); | |
| 251 }; | |
| 252 } | |
| 253 | |
| 254 Instantiator visitInterpolatedStatement(InterpolatedStatement node) { | |
| 255 var nameOrPosition = node.nameOrPosition; | |
| 256 return (arguments) { | |
| 257 var value = arguments[nameOrPosition]; | |
| 258 if (value is Node) return value.toStatement(); | |
| 259 error('Interpolated value #$nameOrPosition is not a Statement: $value'); | |
| 260 }; | |
| 261 } | |
| 262 | |
| 263 Instantiator visitSplayableStatement(Node node) { | |
| 264 if (node is InterpolatedStatement) { | |
| 265 var nameOrPosition = node.nameOrPosition; | |
| 266 return (arguments) { | |
| 267 var value = arguments[nameOrPosition]; | |
| 268 Statement toStatement(item) { | |
| 269 if (item is Statement) return item; | |
| 270 if (item is Expression) return item.toStatement();; | |
| 271 return error('Interpolated value #$nameOrPosition is not ' | |
| 272 'a Statement or List of Statements: $value'); | |
| 273 } | |
| 274 if (value is Iterable) return value.map(toStatement); | |
| 275 return toStatement(value); | |
| 276 }; | |
| 277 } | |
| 278 return visit(node); | |
| 279 } | |
| 280 | |
| 281 Instantiator visitProgram(Program node) { | |
| 282 List instantiators = node.body.map(visitSplayableStatement).toList(); | |
| 283 return (arguments) { | |
| 284 List<Statement> statements = <Statement>[]; | |
| 285 void add(node) { | |
| 286 if (node is EmptyStatement) return; | |
| 287 if (node is Iterable) { | |
| 288 statements.addAll(node); | |
| 289 } else { | |
| 290 statements.add(node.toStatement()); | |
| 291 } | |
| 292 } | |
| 293 for (Instantiator instantiator in instantiators) { | |
| 294 add(instantiator(arguments)); | |
| 295 } | |
| 296 return new Program(statements); | |
| 297 }; | |
| 298 } | |
| 299 | |
| 300 Instantiator visitBlock(Block node) { | |
| 301 List instantiators = node.statements.map(visitSplayableStatement).toList(); | |
| 302 return (arguments) { | |
| 303 List<Statement> statements = <Statement>[]; | |
| 304 void add(node) { | |
| 305 if (node is EmptyStatement) return; | |
| 306 if (node is Iterable) { | |
| 307 statements.addAll(node); | |
| 308 } else if (node is Block) { | |
| 309 statements.addAll(node.statements); | |
| 310 } else { | |
| 311 statements.add(node.toStatement()); | |
| 312 } | |
| 313 } | |
| 314 for (Instantiator instantiator in instantiators) { | |
| 315 add(instantiator(arguments)); | |
| 316 } | |
| 317 return new Block(statements); | |
| 318 }; | |
| 319 } | |
| 320 | |
| 321 Instantiator visitExpressionStatement(ExpressionStatement node) { | |
| 322 Instantiator buildExpression = visit(node.expression); | |
| 323 return (arguments) { | |
| 324 return buildExpression(arguments).toStatement(); | |
| 325 }; | |
| 326 } | |
| 327 | |
| 328 Instantiator visitEmptyStatement(EmptyStatement node) => | |
| 329 (arguments) => new EmptyStatement(); | |
| 330 | |
| 331 Instantiator visitIf(If node) { | |
| 332 if (node.condition is InterpolatedExpression) { | |
| 333 return visitIfConditionalCompilation(node); | |
| 334 } else { | |
| 335 return visitIfNormal(node); | |
| 336 } | |
| 337 } | |
| 338 | |
| 339 Instantiator visitIfConditionalCompilation(If node) { | |
| 340 // Special version of visitInterpolatedExpression that permits bools. | |
| 341 compileCondition(InterpolatedExpression node) { | |
| 342 var nameOrPosition = node.nameOrPosition; | |
| 343 return (arguments) { | |
| 344 var value = arguments[nameOrPosition]; | |
| 345 if (value is bool) return value; | |
| 346 if (value is Expression) return value; | |
| 347 if (value is String) return convertStringToVariableUse(value);; | |
| 348 error('Interpolated value #$nameOrPosition ' | |
| 349 'is not an Expression: $value'); | |
| 350 }; | |
| 351 } | |
| 352 var makeCondition = compileCondition(node.condition); | |
| 353 Instantiator makeThen = visit(node.then); | |
| 354 Instantiator makeOtherwise = visit(node.otherwise); | |
| 355 return (arguments) { | |
| 356 var condition = makeCondition(arguments); | |
| 357 if (condition is bool) { | |
| 358 if (condition == true) { | |
| 359 return makeThen(arguments); | |
| 360 } else { | |
| 361 return makeOtherwise(arguments); | |
| 362 } | |
| 363 } | |
| 364 return new If( | |
| 365 condition, | |
| 366 makeThen(arguments), | |
| 367 makeOtherwise(arguments)); | |
| 368 }; | |
| 369 } | |
| 370 | |
| 371 Instantiator visitIfNormal(If node) { | |
| 372 Instantiator makeCondition = visit(node.condition); | |
| 373 Instantiator makeThen = visit(node.then); | |
| 374 Instantiator makeOtherwise = visit(node.otherwise); | |
| 375 return (arguments) { | |
| 376 return new If( | |
| 377 makeCondition(arguments), | |
| 378 makeThen(arguments), | |
| 379 makeOtherwise(arguments)); | |
| 380 }; | |
| 381 } | |
| 382 | |
| 383 Instantiator visitFor(For node) { | |
| 384 Instantiator makeInit = visitNullable(node.init); | |
| 385 Instantiator makeCondition = visitNullable(node.condition); | |
| 386 Instantiator makeUpdate = visitNullable(node.update); | |
| 387 Instantiator makeBody = visit(node.body); | |
| 388 return (arguments) { | |
| 389 return new For( | |
| 390 makeInit(arguments), makeCondition(arguments), makeUpdate(arguments), | |
| 391 makeBody(arguments)); | |
| 392 }; | |
| 393 } | |
| 394 | |
| 395 Instantiator visitForIn(ForIn node) { | |
| 396 Instantiator makeLeftHandSide = visit(node.leftHandSide); | |
| 397 Instantiator makeObject = visit(node.object); | |
| 398 Instantiator makeBody = visit(node.body); | |
| 399 return (arguments) { | |
| 400 return new ForIn( | |
| 401 makeLeftHandSide(arguments), | |
| 402 makeObject(arguments), | |
| 403 makeBody(arguments)); | |
| 404 }; | |
| 405 } | |
| 406 | |
| 407 TODO(String name) { | |
| 408 throw new UnimplementedError('$this.$name'); | |
| 409 } | |
| 410 | |
| 411 Instantiator visitWhile(While node) { | |
| 412 Instantiator makeCondition = visit(node.condition); | |
| 413 Instantiator makeBody = visit(node.body); | |
| 414 return (arguments) { | |
| 415 return new While(makeCondition(arguments), makeBody(arguments)); | |
| 416 }; | |
| 417 } | |
| 418 | |
| 419 Instantiator visitDo(Do node) { | |
| 420 Instantiator makeBody = visit(node.body); | |
| 421 Instantiator makeCondition = visit(node.condition); | |
| 422 return (arguments) { | |
| 423 return new Do(makeBody(arguments), makeCondition(arguments)); | |
| 424 }; | |
| 425 } | |
| 426 | |
| 427 Instantiator visitContinue(Continue node) => | |
| 428 (arguments) => new Continue(node.targetLabel); | |
| 429 | |
| 430 Instantiator visitBreak(Break node) => | |
| 431 (arguments) => new Break(node.targetLabel); | |
| 432 | |
| 433 Instantiator visitReturn(Return node) { | |
| 434 Instantiator makeExpression = visitNullable(node.value); | |
| 435 return (arguments) => new Return(makeExpression(arguments)); | |
| 436 } | |
| 437 | |
| 438 Instantiator visitDartYield(DartYield node) { | |
| 439 Instantiator makeExpression = visit(node.expression); | |
| 440 return (arguments) => new DartYield(makeExpression(arguments), node.hasStar)
; | |
| 441 } | |
| 442 | |
| 443 Instantiator visitThrow(Throw node) { | |
| 444 Instantiator makeExpression = visit(node.expression); | |
| 445 return (arguments) => new Throw(makeExpression(arguments)); | |
| 446 } | |
| 447 | |
| 448 Instantiator visitTry(Try node) { | |
| 449 Instantiator makeBody = visit(node.body); | |
| 450 Instantiator makeCatch = visitNullable(node.catchPart); | |
| 451 Instantiator makeFinally = visitNullable(node.finallyPart); | |
| 452 return (arguments) => new Try( | |
| 453 makeBody(arguments), makeCatch(arguments), makeFinally(arguments)); | |
| 454 } | |
| 455 | |
| 456 Instantiator visitCatch(Catch node) { | |
| 457 Instantiator makeDeclaration = visit(node.declaration); | |
| 458 Instantiator makeBody = visit(node.body); | |
| 459 return (arguments) => new Catch( | |
| 460 makeDeclaration(arguments), makeBody(arguments)); | |
| 461 } | |
| 462 | |
| 463 Instantiator visitSwitch(Switch node) { | |
| 464 Instantiator makeKey = visit(node.key); | |
| 465 Iterable<Instantiator> makeCases = node.cases.map(visit); | |
| 466 return (arguments) { | |
| 467 return new Switch(makeKey(arguments), | |
| 468 makeCases.map((Instantiator makeCase) => makeCase(arguments)) | |
| 469 .toList()); | |
| 470 }; | |
| 471 } | |
| 472 | |
| 473 Instantiator visitCase(Case node) { | |
| 474 Instantiator makeExpression = visit(node.expression); | |
| 475 Instantiator makeBody = visit(node.body); | |
| 476 return (arguments) { | |
| 477 return new Case(makeExpression(arguments), makeBody(arguments)); | |
| 478 }; | |
| 479 } | |
| 480 | |
| 481 Instantiator visitDefault(Default node) { | |
| 482 Instantiator makeBody = visit(node.body); | |
| 483 return (arguments) { | |
| 484 return new Default(makeBody(arguments)); | |
| 485 }; | |
| 486 } | |
| 487 | |
| 488 Instantiator visitFunctionDeclaration(FunctionDeclaration node) { | |
| 489 Instantiator makeName = visit(node.name); | |
| 490 Instantiator makeFunction = visit(node.function); | |
| 491 return (arguments) => | |
| 492 new FunctionDeclaration(makeName(arguments), makeFunction(arguments)); | |
| 493 } | |
| 494 | |
| 495 Instantiator visitLabeledStatement(LabeledStatement node) { | |
| 496 Instantiator makeBody = visit(node.body); | |
| 497 return (arguments) => new LabeledStatement(node.label, makeBody(arguments)); | |
| 498 } | |
| 499 | |
| 500 Instantiator visitLiteralStatement(LiteralStatement node) => | |
| 501 TODO('visitLiteralStatement'); | |
| 502 Instantiator visitLiteralExpression(LiteralExpression node) => | |
| 503 TODO('visitLiteralExpression'); | |
| 504 | |
| 505 Instantiator visitVariableDeclarationList(VariableDeclarationList node) { | |
| 506 List<Instantiator> declarationMakers = | |
| 507 node.declarations.map(visit).toList(); | |
| 508 return (arguments) { | |
| 509 List<VariableInitialization> declarations = <VariableInitialization>[]; | |
| 510 for (Instantiator instantiator in declarationMakers) { | |
| 511 var result = instantiator(arguments); | |
| 512 declarations.add(result); | |
| 513 } | |
| 514 return new VariableDeclarationList(declarations); | |
| 515 }; | |
| 516 } | |
| 517 | |
| 518 Instantiator visitAssignment(Assignment node) { | |
| 519 Instantiator makeLeftHandSide = visit(node.leftHandSide); | |
| 520 String op = node.op; | |
| 521 Instantiator makeValue = visitNullable(node.value); | |
| 522 return (arguments) { | |
| 523 return new Assignment.compound( | |
| 524 makeLeftHandSide(arguments), | |
| 525 op, | |
| 526 makeValue(arguments)); | |
| 527 }; | |
| 528 } | |
| 529 | |
| 530 Instantiator visitVariableInitialization(VariableInitialization node) { | |
| 531 Instantiator makeDeclaration = visit(node.declaration); | |
| 532 Instantiator makeValue = visitNullable(node.value); | |
| 533 return (arguments) { | |
| 534 return new VariableInitialization( | |
| 535 makeDeclaration(arguments), makeValue(arguments)); | |
| 536 }; | |
| 537 } | |
| 538 | |
| 539 Instantiator visitConditional(Conditional cond) { | |
| 540 Instantiator makeCondition = visit(cond.condition); | |
| 541 Instantiator makeThen = visit(cond.then); | |
| 542 Instantiator makeOtherwise = visit(cond.otherwise); | |
| 543 return (arguments) => new Conditional( | |
| 544 makeCondition(arguments), | |
| 545 makeThen(arguments), | |
| 546 makeOtherwise(arguments)); | |
| 547 } | |
| 548 | |
| 549 Instantiator visitNew(New node) => | |
| 550 handleCallOrNew(node, (target, arguments) => new New(target, arguments)); | |
| 551 | |
| 552 Instantiator visitCall(Call node) => | |
| 553 handleCallOrNew(node, (target, arguments) => new Call(target, arguments)); | |
| 554 | |
| 555 Instantiator handleCallOrNew(Call node, finish(target, arguments)) { | |
| 556 Instantiator makeTarget = visit(node.target); | |
| 557 Iterable<Instantiator> argumentMakers = | |
| 558 node.arguments.map(visitSplayableExpression).toList(); | |
| 559 | |
| 560 // TODO(sra): Avoid copying call arguments if no interpolation or forced | |
| 561 // copying. | |
| 562 return (arguments) { | |
| 563 Node target = makeTarget(arguments); | |
| 564 List<Expression> callArguments = <Expression>[]; | |
| 565 for (Instantiator instantiator in argumentMakers) { | |
| 566 var result = instantiator(arguments); | |
| 567 if (result is Iterable) { | |
| 568 callArguments.addAll(result); | |
| 569 } else { | |
| 570 callArguments.add(result); | |
| 571 } | |
| 572 } | |
| 573 return finish(target, callArguments.toList(growable: false)); | |
| 574 }; | |
| 575 } | |
| 576 | |
| 577 Instantiator visitBinary(Binary node) { | |
| 578 Instantiator makeLeft = visit(node.left); | |
| 579 Instantiator makeRight = visit(node.right); | |
| 580 String op = node.op; | |
| 581 return (arguments) => | |
| 582 new Binary(op, makeLeft(arguments), makeRight(arguments)); | |
| 583 } | |
| 584 | |
| 585 Instantiator visitPrefix(Prefix node) { | |
| 586 Instantiator makeOperand = visit(node.argument); | |
| 587 String op = node.op; | |
| 588 return (arguments) => new Prefix(op, makeOperand(arguments)); | |
| 589 } | |
| 590 | |
| 591 Instantiator visitPostfix(Postfix node) { | |
| 592 Instantiator makeOperand = visit(node.argument); | |
| 593 String op = node.op; | |
| 594 return (arguments) => new Postfix(op, makeOperand(arguments)); | |
| 595 } | |
| 596 | |
| 597 Instantiator visitVariableUse(VariableUse node) => | |
| 598 (arguments) => new VariableUse(node.name); | |
| 599 | |
| 600 Instantiator visitThis(This node) => (arguments) => new This(); | |
| 601 | |
| 602 Instantiator visitVariableDeclaration(VariableDeclaration node) => | |
| 603 (arguments) => new VariableDeclaration(node.name); | |
| 604 | |
| 605 Instantiator visitParameter(Parameter node) => | |
| 606 (arguments) => new Parameter(node.name); | |
| 607 | |
| 608 Instantiator visitAccess(PropertyAccess node) { | |
| 609 Instantiator makeReceiver = visit(node.receiver); | |
| 610 Instantiator makeSelector = visit(node.selector); | |
| 611 return (arguments) => | |
| 612 new PropertyAccess(makeReceiver(arguments), makeSelector(arguments)); | |
| 613 } | |
| 614 | |
| 615 Instantiator visitNamedFunction(NamedFunction node) { | |
| 616 Instantiator makeDeclaration = visit(node.name); | |
| 617 Instantiator makeFunction = visit(node.function); | |
| 618 return (arguments) => | |
| 619 new NamedFunction(makeDeclaration(arguments), makeFunction(arguments)); | |
| 620 } | |
| 621 | |
| 622 Instantiator visitFun(Fun node) { | |
| 623 List<Instantiator> paramMakers = node.params.map(visitSplayable).toList(); | |
| 624 Instantiator makeBody = visit(node.body); | |
| 625 // TODO(sra): Avoid copying params if no interpolation or forced copying. | |
| 626 return (arguments) { | |
| 627 List<Parameter> params = <Parameter>[]; | |
| 628 for (Instantiator instantiator in paramMakers) { | |
| 629 var result = instantiator(arguments); | |
| 630 if (result is Iterable) { | |
| 631 params.addAll(result); | |
| 632 } else { | |
| 633 params.add(result); | |
| 634 } | |
| 635 } | |
| 636 Statement body = makeBody(arguments); | |
| 637 return new Fun(params, body); | |
| 638 }; | |
| 639 } | |
| 640 | |
| 641 Instantiator visitLiteralBool(LiteralBool node) => | |
| 642 (arguments) => new LiteralBool(node.value); | |
| 643 | |
| 644 Instantiator visitLiteralString(LiteralString node) => | |
| 645 (arguments) => new LiteralString(node.value); | |
| 646 | |
| 647 Instantiator visitLiteralNumber(LiteralNumber node) => | |
| 648 (arguments) => new LiteralNumber(node.value); | |
| 649 | |
| 650 Instantiator visitLiteralNull(LiteralNull node) => | |
| 651 (arguments) => new LiteralNull(); | |
| 652 | |
| 653 Instantiator visitArrayInitializer(ArrayInitializer node) { | |
| 654 // TODO(sra): Implement splicing? | |
| 655 List<Instantiator> elementMakers = node.elements | |
| 656 .map(visit) | |
| 657 .toList(growable: false); | |
| 658 return (arguments) { | |
| 659 List<Expression> elements = elementMakers | |
| 660 .map((Instantiator instantiator) => instantiator(arguments)) | |
| 661 .toList(growable: false); | |
| 662 return new ArrayInitializer(elements); | |
| 663 }; | |
| 664 } | |
| 665 | |
| 666 Instantiator visitArrayHole(ArrayHole node) { | |
| 667 return (arguments) => new ArrayHole(); | |
| 668 } | |
| 669 | |
| 670 Instantiator visitObjectInitializer(ObjectInitializer node) { | |
| 671 List<Instantiator> propertyMakers = | |
| 672 node.properties.map(visitSplayable).toList(); | |
| 673 bool isOneLiner = node.isOneLiner; | |
| 674 return (arguments) { | |
| 675 List<Property> properties = <Property>[]; | |
| 676 for (Instantiator instantiator in propertyMakers) { | |
| 677 var result = instantiator(arguments); | |
| 678 if (result is Iterable) { | |
| 679 properties.addAll(result); | |
| 680 } else { | |
| 681 properties.add(result); | |
| 682 } | |
| 683 } | |
| 684 return new ObjectInitializer(properties, isOneLiner: isOneLiner); | |
| 685 }; | |
| 686 } | |
| 687 | |
| 688 Instantiator visitProperty(Property node) { | |
| 689 Instantiator makeName = visit(node.name); | |
| 690 Instantiator makeValue = visit(node.value); | |
| 691 return (arguments) { | |
| 692 return new Property(makeName(arguments), makeValue(arguments)); | |
| 693 }; | |
| 694 } | |
| 695 | |
| 696 Instantiator visitRegExpLiteral(RegExpLiteral node) => | |
| 697 (arguments) => new RegExpLiteral(node.pattern); | |
| 698 | |
| 699 Instantiator visitComment(Comment node) => TODO('visitComment'); | |
| 700 | |
| 701 Instantiator visitAwait(Await node) { | |
| 702 Instantiator makeExpression = visit(node.expression); | |
| 703 return (arguments) { | |
| 704 return new Await(makeExpression(arguments)); | |
| 705 }; | |
| 706 } | |
| 707 } | |
| 708 | |
| 709 /** | |
| 710 * InterpolatedNodeAnalysis determines which AST trees contain | |
| 711 * [InterpolatedNode]s, and the names of the named interpolated nodes. | |
| 712 */ | |
| 713 class InterpolatedNodeAnalysis extends BaseVisitor { | |
| 714 final Set<Node> containsInterpolatedNode = new Set<Node>(); | |
| 715 final Set<String> holeNames = new Set<String>(); | |
| 716 int count = 0; | |
| 717 | |
| 718 InterpolatedNodeAnalysis(); | |
| 719 | |
| 720 bool containsInterpolatedNodes(Node node) => | |
| 721 containsInterpolatedNode.contains(node); | |
| 722 | |
| 723 void visit(Node node) { | |
| 724 node.accept(this); | |
| 725 } | |
| 726 | |
| 727 void visitNode(Node node) { | |
| 728 int before = count; | |
| 729 node.visitChildren(this); | |
| 730 if (count != before) containsInterpolatedNode.add(node); | |
| 731 return null; | |
| 732 } | |
| 733 | |
| 734 visitInterpolatedNode(InterpolatedNode node) { | |
| 735 containsInterpolatedNode.add(node); | |
| 736 if (node.isNamed) holeNames.add(node.nameOrPosition); | |
| 737 ++count; | |
| 738 } | |
| 739 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 931953002:
Move js_ast library to its own package under pkg (Closed)
Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart