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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 | |
| 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 int positionalArgumentCount = -1; | |
| 51 // TODO(sra): Named arguments. | |
| 52 | |
| 53 Template(this.source, this.ast, | |
| 54 {this.isExpression: true, this.forceCopy: false}) { | |
| 55 _compile(); | |
| 56 } | |
| 57 | |
| 58 Template.withExpressionResult(this.ast) | |
| 59 : source = null, isExpression = true, forceCopy = false { | |
| 60 assert(ast is Expression); | |
| 61 assert(_checkNoPlaceholders()); | |
| 62 positionalArgumentCount = 0; | |
| 63 instantiator = (arguments) => ast; | |
| 64 } | |
| 65 | |
| 66 Template.withStatementResult(this.ast) | |
| 67 : source = null, isExpression = false, forceCopy = false { | |
| 68 assert(ast is Statement); | |
| 69 assert(_checkNoPlaceholders()); | |
| 70 positionalArgumentCount = 0; | |
| 71 instantiator = (arguments) => ast; | |
| 72 } | |
| 73 | |
| 74 bool _checkNoPlaceholders() { | |
| 75 InstantiatorGeneratorVisitor generator = | |
| 76 new InstantiatorGeneratorVisitor(false); | |
| 77 generator.compile(ast); | |
| 78 return generator.analysis.count == 0; | |
| 79 } | |
| 80 | |
| 81 void _compile() { | |
| 82 InstantiatorGeneratorVisitor generator = | |
| 83 new InstantiatorGeneratorVisitor(forceCopy); | |
| 84 instantiator = generator.compile(ast); | |
| 85 positionalArgumentCount = generator.analysis.count; | |
| 86 } | |
| 87 | |
| 88 Node instantiate(List arguments) { | |
| 89 if (arguments is List) { | |
| 90 if (arguments.length != positionalArgumentCount) { | |
| 91 throw 'Wrong number of template arguments, given ${arguments.length}, ' | |
| 92 'expected $positionalArgumentCount'; | |
| 93 } | |
| 94 return instantiator(arguments); | |
| 95 } | |
| 96 // TODO(sra): Add named placeholders and a Map of arguments. | |
| 97 throw new UnimplementedError('Template arguments must be a list'); | |
| 98 } | |
| 99 } | |
| 100 | |
| 101 /** | |
| 102 * An Instantiator is a Function that generates a JS AST tree or List of | |
| 103 * trees. [arguments] is a List for positional templates, or (TODO) Map for | |
| 104 * named templates. | |
| 105 */ | |
| 106 typedef Node Instantiator(var arguments); | |
| 107 | |
| 108 | |
| 109 /** | |
| 110 * InstantiatorGeneratorVisitor compiles a template. This class compiles a tree | |
| 111 * containing [InterpolatedNode]s into a function that will create a copy of the | |
| 112 * tree with the interpolated nodes substituted with provided values. | |
| 113 */ | |
| 114 class InstantiatorGeneratorVisitor implements NodeVisitor<Instantiator> { | |
| 115 | |
| 116 final bool forceCopy; | |
| 117 | |
| 118 InterpolatedNodeAnalysis analysis = new InterpolatedNodeAnalysis(); | |
| 119 | |
| 120 /** | |
| 121 * The entire tree is cloned if [forceCopy] is true. | |
| 122 */ | |
| 123 InstantiatorGeneratorVisitor(this.forceCopy); | |
| 124 | |
| 125 Instantiator compile(Node node) { | |
| 126 analysis.visit(node); | |
| 127 Instantiator result = visit(node); | |
| 128 return result; | |
| 129 } | |
| 130 | |
| 131 static error(String message) { | |
| 132 throw message; | |
| 133 } | |
| 134 | |
| 135 static Instantiator same(Node node) => (arguments) => node; | |
| 136 static Node makeNull(arguments) => null; | |
| 137 | |
| 138 Instantiator visit(Node node) { | |
| 139 if (forceCopy || analysis.containsInterpolatedNodes(node)) { | |
| 140 return node.accept(this); | |
| 141 } | |
| 142 return same(node); | |
| 143 } | |
| 144 | |
| 145 Instantiator visitNullable(Node node) { | |
| 146 if (node == null) return makeNull; | |
| 147 return visit(node); | |
| 148 } | |
| 149 | |
| 150 Instantiator visitSplayable(Node node) { | |
| 151 // TODO(sra): Process immediate [InterpolatedNode]s, permitting splaying. | |
| 152 return visit(node); | |
| 153 } | |
| 154 | |
| 155 Instantiator visitNode(Node node) { | |
| 156 throw 'Unimplemented InstantiatorGeneratorVisitor for $node'; | |
| 157 } | |
| 158 | |
| 159 static RegExp identiferRE = new RegExp(r'^[A-Za-z_$][A-Za-z_$0-9]*$'); | |
| 160 | |
| 161 static Expression convertStringToVariableUse(String value) { | |
| 162 assert(identiferRE.hasMatch(value)); | |
| 163 return new VariableUse(value); | |
| 164 } | |
| 165 | |
| 166 Instantiator visitInterpolatedExpression(InterpolatedExpression node) { | |
| 167 int position = node.name; | |
| 168 return (arguments) { | |
| 169 var value = arguments[position]; | |
| 170 if (value is Expression) return value; | |
| 171 if (value is String) return convertStringToVariableUse(value);; | |
| 172 error('Interpolated value #$position is not an Expression: $value'); | |
| 173 }; | |
| 174 } | |
| 175 | |
| 176 Instantiator visitSplayableExpression(Node node) { | |
| 177 if (node is InterpolatedExpression) { | |
| 178 int position = node.name; | |
| 179 return (arguments) { | |
| 180 var value = arguments[position]; | |
| 181 Expression toExpression(item) { | |
| 182 if (item is Expression) return item; | |
| 183 if (item is String) return convertStringToVariableUse(item); | |
| 184 error('Interpolated value #$position is not ' | |
| 185 'an Expression or List of Expressions: $value'); | |
| 186 } | |
| 187 if (value is Iterable) return value.map(toExpression); | |
| 188 return toExpression(value); | |
| 189 }; | |
| 190 } | |
| 191 return visit(node); | |
| 192 } | |
| 193 | |
| 194 Instantiator visitInterpolatedLiteral(InterpolatedLiteral node) { | |
| 195 int position = node.name; | |
| 196 return (arguments) { | |
| 197 var value = arguments[position]; | |
| 198 if (value is Literal) return value; | |
| 199 error('Interpolated value #$position is not a Literal: ' | |
| 200 '$value (${value.runtimeType})'); | |
| 201 }; | |
| 202 } | |
| 203 | |
| 204 Instantiator visitInterpolatedParameter(InterpolatedParameter node) { | |
| 205 int position = node.name; | |
| 206 return (arguments) { | |
| 207 var value = arguments[position]; | |
| 208 | |
| 209 Parameter toParameter(item) { | |
| 210 if (item is Parameter) return item; | |
| 211 if (item is String) return new Parameter(item); | |
| 212 error('Interpolated value #$position is not a Parameter or ' | |
| 213 'List of Parameters: $value (a ${value.runtimeType})'); | |
| 214 } | |
| 215 if (value is Iterable) return value.map(toParameter); | |
| 216 return toParameter(value); | |
| 217 }; | |
| 218 } | |
| 219 | |
| 220 Instantiator visitInterpolatedSelector(InterpolatedSelector node) { | |
| 221 // A selector is an expression, as in `a[selector]`. | |
| 222 // A String argument converted into a LiteralString, so `a.#` with argument | |
| 223 // 'foo' generates `a["foo"]` which prints as `a.foo`. | |
| 224 int position = node.name; | |
| 225 return (arguments) { | |
| 226 var value = arguments[position]; | |
| 227 if (value is Expression) return value; | |
| 228 if (value is String) return new LiteralString('"$value"'); | |
| 229 error('Interpolated value #$position is not a selector: $value'); | |
| 230 }; | |
| 231 } | |
| 232 | |
| 233 Instantiator visitInterpolatedStatement(InterpolatedStatement node) { | |
| 234 int position = node.name; | |
| 235 return (arguments) { | |
| 236 var value = arguments[position]; | |
| 237 if (value is Node) return value.toStatement(); | |
| 238 error('Interpolated value #$position is not a Statement: $value'); | |
| 239 }; | |
| 240 } | |
| 241 | |
| 242 Instantiator visitSplayableStatement(Node node) { | |
| 243 if (node is InterpolatedStatement) { | |
| 244 int position = node.name; | |
| 245 return (arguments) { | |
| 246 var value = arguments[position]; | |
| 247 Statement toStatement(item) { | |
| 248 if (item is Statement) return item; | |
| 249 if (item is Expression) return item.toStatement();; | |
| 250 error('Interpolated value #$position is not ' | |
| 251 'a Statement or List of Statements: $value'); | |
| 252 } | |
| 253 if (value is Iterable) return value.map(toStatement); | |
| 254 return toStatement(value); | |
| 255 }; | |
| 256 } | |
| 257 return visit(node); | |
| 258 } | |
| 259 | |
| 260 Instantiator visitProgram(Program node) { | |
| 261 List instantiators = node.body.map(visitSplayableStatement).toList(); | |
| 262 return (arguments) { | |
| 263 List<Statement> statements = <Statement>[]; | |
| 264 void add(node) { | |
| 265 if (node is EmptyStatement) return; | |
| 266 if (node is Iterable) { | |
| 267 statements.addAll(node); | |
| 268 } else { | |
| 269 statements.add(node.toStatement()); | |
| 270 } | |
| 271 } | |
| 272 for (Instantiator instantiator in instantiators) { | |
| 273 add(instantiator(arguments)); | |
| 274 } | |
| 275 return new Program(statements); | |
| 276 }; | |
| 277 } | |
| 278 | |
| 279 Instantiator visitBlock(Block node) { | |
| 280 List instantiators = node.statements.map(visitSplayableStatement).toList(); | |
| 281 return (arguments) { | |
| 282 List<Statement> statements = <Statement>[]; | |
| 283 void add(node) { | |
| 284 if (node is EmptyStatement) return; | |
| 285 if (node is Iterable) { | |
| 286 statements.addAll(node); | |
| 287 } else if (node is Block) { | |
| 288 statements.addAll(node.statements); | |
| 289 } else { | |
| 290 statements.add(node.toStatement()); | |
| 291 } | |
| 292 } | |
| 293 for (Instantiator instantiator in instantiators) { | |
| 294 add(instantiator(arguments)); | |
| 295 } | |
| 296 return new Block(statements); | |
| 297 }; | |
| 298 } | |
| 299 | |
| 300 Instantiator visitExpressionStatement(ExpressionStatement node) { | |
| 301 Instantiator buildExpression = visit(node.expression); | |
| 302 return (arguments) { | |
| 303 return buildExpression(arguments).toStatement(); | |
| 304 }; | |
| 305 } | |
| 306 | |
| 307 Instantiator visitEmptyStatement(EmptyStatement node) => | |
| 308 (arguments) => new EmptyStatement(); | |
| 309 | |
| 310 Instantiator visitIf(If node) { | |
| 311 if (node.condition is InterpolatedExpression) { | |
| 312 return visitIfConditionalCompilation(node); | |
| 313 } else { | |
| 314 return visitIfNormal(node); | |
| 315 } | |
| 316 } | |
| 317 | |
| 318 Instantiator visitIfConditionalCompilation(If node) { | |
| 319 // Special version of visitInterpolatedExpression that permits bools. | |
| 320 compileCondition(InterpolatedExpression node) { | |
| 321 int position = node.name; | |
| 322 return (arguments) { | |
| 323 var value = arguments[position]; | |
| 324 if (value is bool) return value; | |
| 325 if (value is Expression) return value; | |
| 326 if (value is String) return convertStringToVariableUse(value);; | |
| 327 error('Interpolated value #$position is not an Expression: $value'); | |
| 328 }; | |
| 329 } | |
| 330 var makeCondition = compileCondition(node.condition); | |
| 331 Instantiator makeThen = visit(node.then); | |
| 332 Instantiator makeOtherwise = visit(node.otherwise); | |
| 333 return (arguments) { | |
| 334 var condition = makeCondition(arguments); | |
| 335 if (condition is bool) { | |
| 336 if (condition == true) { | |
| 337 return makeThen(arguments); | |
| 338 } else { | |
| 339 return makeOtherwise(arguments); | |
| 340 } | |
| 341 } | |
| 342 return new If( | |
| 343 condition, | |
| 344 makeThen(arguments), | |
| 345 makeOtherwise(arguments)); | |
| 346 }; | |
| 347 } | |
| 348 | |
| 349 Instantiator visitIfNormal(If node) { | |
| 350 Instantiator makeCondition = visit(node.condition); | |
| 351 Instantiator makeThen = visit(node.then); | |
| 352 Instantiator makeOtherwise = visit(node.otherwise); | |
| 353 return (arguments) { | |
| 354 return new If( | |
| 355 makeCondition(arguments), | |
| 356 makeThen(arguments), | |
| 357 makeOtherwise(arguments)); | |
| 358 }; | |
| 359 } | |
| 360 | |
| 361 Instantiator visitFor(For node) { | |
| 362 Instantiator makeInit = visitNullable(node.init); | |
| 363 Instantiator makeCondition = visitNullable(node.condition); | |
| 364 Instantiator makeUpdate = visitNullable(node.update); | |
| 365 Instantiator makeBody = visit(node.body); | |
| 366 return (arguments) { | |
| 367 return new For( | |
| 368 makeInit(arguments), makeCondition(arguments), makeUpdate(arguments), | |
| 369 makeBody(arguments)); | |
| 370 }; | |
| 371 } | |
| 372 | |
| 373 Instantiator visitForIn(ForIn node) { | |
| 374 Instantiator makeLeftHandSide = visit(node.leftHandSide); | |
| 375 Instantiator makeObject = visit(node.object); | |
| 376 Instantiator makeBody = visit(node.body); | |
| 377 return (arguments) { | |
| 378 return new ForIn( | |
| 379 makeLeftHandSide(arguments), | |
| 380 makeObject(arguments), | |
| 381 makeBody(arguments)); | |
| 382 }; | |
| 383 } | |
| 384 | |
| 385 TODO(String name) { | |
| 386 throw new UnimplementedError('${this.runtimeType}.$name'); | |
| 387 } | |
| 388 | |
| 389 Instantiator visitWhile(While node) => TODO('visitWhile'); | |
| 390 Instantiator visitDo(Do node) => TODO('visitDo'); | |
| 391 | |
| 392 Instantiator visitContinue(Continue node) => | |
| 393 (arguments) => new Continue(node.targetLabel); | |
| 394 | |
| 395 Instantiator visitBreak(Break node) => | |
| 396 (arguments) => new Break(node.targetLabel); | |
| 397 | |
| 398 Instantiator visitReturn(Return node) { | |
| 399 Instantiator makeExpression = visitNullable(node.value); | |
| 400 return (arguments) => new Return(makeExpression(arguments)); | |
| 401 } | |
| 402 | |
| 403 Instantiator visitThrow(Throw node) { | |
| 404 Instantiator makeExpression = visit(node.expression); | |
| 405 return (arguments) => new Throw(makeExpression(arguments)); | |
| 406 } | |
| 407 | |
| 408 | |
| 409 Instantiator visitTry(Try node) { | |
| 410 Instantiator makeBody = visit(node.body); | |
| 411 Instantiator makeCatch = visitNullable(node.catchPart); | |
| 412 Instantiator makeFinally = visitNullable(node.finallyPart); | |
| 413 return (arguments) => new Try( | |
| 414 makeBody(arguments), makeCatch(arguments), makeFinally(arguments)); | |
| 415 } | |
| 416 | |
| 417 Instantiator visitCatch(Catch node) { | |
| 418 Instantiator makeDeclaration = visit(node.declaration); | |
| 419 Instantiator makeBody = visit(node.body); | |
| 420 return (arguments) => new Catch( | |
| 421 makeDeclaration(arguments), makeBody(arguments)); | |
| 422 } | |
| 423 | |
| 424 Instantiator visitSwitch(Switch node) => TODO('visitSwitch'); | |
| 425 Instantiator visitCase(Case node) => TODO('visitCase'); | |
| 426 Instantiator visitDefault(Default node) => TODO('visitDefault'); | |
| 427 | |
| 428 Instantiator visitFunctionDeclaration(FunctionDeclaration node) { | |
| 429 Instantiator makeName = visit(node.name); | |
| 430 Instantiator makeFunction = visit(node.function); | |
| 431 return (arguments) => | |
| 432 new FunctionDeclaration(makeName(arguments), makeFunction(arguments)); | |
| 433 } | |
| 434 | |
| 435 Instantiator visitLabeledStatement(LabeledStatement node) => | |
| 436 TODO('visitLabeledStatement'); | |
| 437 Instantiator visitLiteralStatement(LiteralStatement node) => | |
| 438 TODO('visitLiteralStatement'); | |
| 439 Instantiator visitBlob(Blob node) => | |
| 440 TODO('visitBlob'); | |
| 441 Instantiator visitLiteralExpression(LiteralExpression node) => | |
| 442 TODO('visitLiteralExpression'); | |
| 443 | |
| 444 Instantiator visitVariableDeclarationList(VariableDeclarationList node) { | |
| 445 List<Instantiator> declarationMakers = | |
| 446 node.declarations.map(visit).toList(); | |
| 447 return (arguments) { | |
| 448 List<VariableInitialization> declarations = <VariableInitialization>[]; | |
| 449 for (Instantiator instantiator in declarationMakers) { | |
| 450 var result = instantiator(arguments); | |
| 451 declarations.add(result); | |
| 452 } | |
| 453 return new VariableDeclarationList(declarations); | |
| 454 }; | |
| 455 } | |
| 456 | |
| 457 Instantiator visitSequence(Sequence node) => TODO('visitSequence'); | |
| 458 | |
| 459 Instantiator visitAssignment(Assignment node) { | |
| 460 Instantiator makeLeftHandSide = visit(node.leftHandSide); | |
| 461 Instantiator makeCompoundTarget = visitNullable(node.compoundTarget); | |
| 462 Instantiator makeValue = visitNullable(node.value); | |
| 463 return (arguments) { | |
| 464 return new Assignment._internal( | |
| 465 makeLeftHandSide(arguments), | |
| 466 makeCompoundTarget(arguments), | |
| 467 makeValue(arguments)); | |
| 468 }; | |
| 469 } | |
| 470 | |
| 471 Instantiator visitVariableInitialization(VariableInitialization node) { | |
| 472 Instantiator makeDeclaration = visit(node.declaration); | |
| 473 Instantiator makeValue = visitNullable(node.value); | |
| 474 return (arguments) { | |
| 475 return new VariableInitialization( | |
| 476 makeDeclaration(arguments), makeValue(arguments)); | |
| 477 }; | |
| 478 } | |
| 479 | |
| 480 Instantiator visitConditional(Conditional cond) { | |
| 481 Instantiator makeCondition = visit(cond.condition); | |
| 482 Instantiator makeThen = visit(cond.then); | |
| 483 Instantiator makeOtherwise = visit(cond.otherwise); | |
| 484 return (arguments) => new Conditional( | |
| 485 makeCondition(arguments), | |
| 486 makeThen(arguments), | |
| 487 makeOtherwise(arguments)); | |
| 488 } | |
| 489 | |
| 490 Instantiator visitNew(New node) => | |
| 491 handleCallOrNew(node, (target, arguments) => new New(target, arguments)); | |
| 492 | |
| 493 Instantiator visitCall(Call node) => | |
| 494 handleCallOrNew(node, (target, arguments) => new Call(target, arguments)); | |
| 495 | |
| 496 Instantiator handleCallOrNew(Call node, finish(target, arguments)) { | |
| 497 Instantiator makeTarget = visit(node.target); | |
| 498 Iterable<Instantiator> argumentMakers = | |
| 499 node.arguments.map(visitSplayableExpression).toList(); | |
| 500 | |
| 501 return (arguments) { | |
| 502 Node target = makeTarget(arguments); | |
| 503 List<Expression> callArguments = <Expression>[]; | |
| 504 for (Instantiator instantiator in argumentMakers) { | |
| 505 var result = instantiator(arguments); | |
| 506 if (result is Iterable) { | |
| 507 callArguments.addAll(result); | |
| 508 } else { | |
| 509 callArguments.add(result); | |
| 510 } | |
| 511 } | |
| 512 return finish(target, callArguments); | |
| 513 }; | |
| 514 } | |
| 515 | |
| 516 Instantiator visitBinary(Binary node) { | |
| 517 Instantiator makeLeft = visit(node.left); | |
| 518 Instantiator makeRight = visit(node.right); | |
| 519 String op = node.op; | |
| 520 return (arguments) => | |
| 521 new Binary(op, makeLeft(arguments), makeRight(arguments)); | |
| 522 } | |
| 523 | |
| 524 Instantiator visitPrefix(Prefix node) { | |
| 525 Instantiator makeOperand = visit(node.argument); | |
| 526 String op = node.op; | |
| 527 return (arguments) => new Prefix(op, makeOperand(arguments)); | |
| 528 } | |
| 529 | |
| 530 Instantiator visitPostfix(Postfix node) { | |
| 531 Instantiator makeOperand = visit(node.argument); | |
| 532 String op = node.op; | |
| 533 return (arguments) => new Postfix(op, makeOperand(arguments)); | |
| 534 } | |
| 535 | |
| 536 Instantiator visitVariableUse(VariableUse node) => | |
| 537 (arguments) => new VariableUse(node.name); | |
| 538 | |
| 539 Instantiator visitThis(This node) => (arguments) => new This(); | |
| 540 | |
| 541 Instantiator visitVariableDeclaration(VariableDeclaration node) => | |
| 542 (arguments) => new VariableDeclaration(node.name); | |
| 543 | |
| 544 Instantiator visitParameter(Parameter node) => | |
| 545 (arguments) => new Parameter(node.name); | |
| 546 | |
| 547 Instantiator visitAccess(PropertyAccess node) { | |
| 548 Instantiator makeReceiver = visit(node.receiver); | |
| 549 Instantiator makeSelector = visit(node.selector); | |
| 550 return (arguments) => | |
| 551 new PropertyAccess(makeReceiver(arguments), makeSelector(arguments)); | |
| 552 } | |
| 553 | |
| 554 Instantiator visitNamedFunction(NamedFunction node) { | |
| 555 Instantiator makeDeclaration = visit(node.name); | |
| 556 Instantiator makeFunction = visit(node.function); | |
| 557 return (arguments) => | |
| 558 new NamedFunction(makeDeclaration(arguments), makeFunction(arguments)); | |
| 559 } | |
| 560 | |
| 561 Instantiator visitFun(Fun node) { | |
| 562 List<Instantiator> paramMakers = node.params.map(visitSplayable).toList(); | |
| 563 Instantiator makeBody = visit(node.body); | |
| 564 // TODO(sra): Avoid copying params if no interpolation or forced copying. | |
| 565 return (arguments) { | |
| 566 List<Parameter> params = <Parameter>[]; | |
| 567 for (Instantiator instantiator in paramMakers) { | |
| 568 var result = instantiator(arguments); | |
| 569 if (result is Iterable) { | |
| 570 params.addAll(result); | |
| 571 } else { | |
| 572 params.add(result); | |
| 573 } | |
| 574 } | |
| 575 Statement body = makeBody(arguments); | |
| 576 return new Fun(params, body); | |
| 577 }; | |
| 578 } | |
| 579 | |
| 580 Instantiator visitLiteralBool(LiteralBool node) => | |
| 581 (arguments) => new LiteralBool(node.value); | |
| 582 | |
| 583 Instantiator visitLiteralString(LiteralString node) => | |
| 584 (arguments) => new LiteralString(node.value); | |
| 585 | |
| 586 Instantiator visitLiteralNumber(LiteralNumber node) => | |
| 587 (arguments) => new LiteralNumber(node.value); | |
| 588 | |
| 589 Instantiator visitLiteralNull(LiteralNull node) => | |
| 590 (arguments) => new LiteralNull(); | |
| 591 | |
| 592 Instantiator visitArrayInitializer(ArrayInitializer node) { | |
| 593 // Assume array has no missing elements. | |
| 594 // TODO(sra): Splicing? | |
| 595 List<Instantiator> elementMakers = node.elements | |
| 596 .map((ArrayElement element) => visit(element.value)) | |
| 597 .toList(); | |
| 598 return (arguments) { | |
| 599 List<ArrayElement> elements = <ArrayElement>[]; | |
| 600 void add(Expression value) { | |
| 601 elements.add(new ArrayElement(elements.length, value)); | |
| 602 } | |
| 603 for (Instantiator instantiator in elementMakers) { | |
| 604 var result = instantiator(arguments); | |
| 605 add(result); | |
| 606 } | |
| 607 return new ArrayInitializer(elements.length, elements); | |
| 608 }; | |
| 609 } | |
| 610 | |
| 611 Instantiator visitArrayElement(ArrayElement node) { | |
| 612 throw 'Should not get here'; // Handled in visitArrayInitializer. | |
| 613 } | |
| 614 | |
| 615 Instantiator visitObjectInitializer(ObjectInitializer node) { | |
| 616 List<Instantiator> propertyMakers = | |
| 617 node.properties.map(visitSplayable).toList(); | |
| 618 bool isOneLiner = node.isOneLiner; | |
| 619 return (arguments) { | |
| 620 List<Property> properties = <Property>[]; | |
| 621 for (Instantiator instantiator in propertyMakers) { | |
| 622 var result = instantiator(arguments); | |
| 623 if (result is Iterable) { | |
| 624 properties.addAll(result); | |
| 625 } else { | |
| 626 properties.add(result); | |
| 627 } | |
| 628 } | |
| 629 return new ObjectInitializer(properties, isOneLiner: isOneLiner); | |
| 630 }; | |
| 631 } | |
| 632 | |
| 633 Instantiator visitProperty(Property node) { | |
| 634 Instantiator makeName = visit(node.name); | |
| 635 Instantiator makeValue = visit(node.value); | |
| 636 return (arguments) { | |
| 637 return new Property(makeName(arguments), makeValue(arguments)); | |
| 638 }; | |
| 639 } | |
| 640 | |
| 641 Instantiator visitRegExpLiteral(RegExpLiteral node) => | |
| 642 (arguments) => new RegExpLiteral(node.pattern); | |
| 643 | |
| 644 Instantiator visitComment(Comment node) => TODO('visitComment'); | |
| 645 } | |
| 646 | |
| 647 /** | |
| 648 * InterpolatedNodeAnalysis extract [InterpolatedNode]s from AST. | |
| 649 */ | |
| 650 class InterpolatedNodeAnalysis extends BaseVisitor { | |
| 651 final Set<Node> containsInterpolatedNode = new Set<Node>(); | |
| 652 final List<InterpolatedNode> interpolatedNodes = <InterpolatedNode>[]; | |
| 653 int count = 0; | |
| 654 | |
| 655 InterpolatedNodeAnalysis(); | |
| 656 | |
| 657 bool containsInterpolatedNodes(Node node) => | |
| 658 containsInterpolatedNode.contains(node); | |
| 659 | |
| 660 void visit(Node node) { | |
| 661 node.accept(this); | |
| 662 } | |
| 663 | |
| 664 void visitNode(Node node) { | |
| 665 int before = count; | |
| 666 node.visitChildren(this); | |
| 667 if (count != before) containsInterpolatedNode.add(node); | |
| 668 return null; | |
| 669 } | |
| 670 | |
| 671 visitInterpolatedNode(InterpolatedNode node) { | |
| 672 interpolatedNodes.add(node); | |
| 673 containsInterpolatedNode.add(node); | |
| 674 ++count; | |
| 675 } | |
| 676 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 246633006:
Revert "JS templates" (Closed)
Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart