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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 /// Library to generate code that can initialize the `StaticConfiguration` in | |
| 6 /// `package:smoke/static.dart`. | |
| 7 /// | |
| 8 /// This library doesn't have any specific logic to extract information from | |
| 9 /// Dart source code. To extract code using the analyzer, take a look at the | |
| 10 /// `smoke.codegen.recorder` library. | |
| 11 library smoke.codegen.generator; | |
| 12 | |
| 13 import 'dart:collection' show SplayTreeMap, SplayTreeSet; | |
| 14 | |
| 15 import 'package:smoke/src/common.dart' show compareLists, compareMaps; | |
| 16 | |
| 17 /// Collects the necessary information and generates code to initialize a | |
| 18 /// `StaticConfiguration`. After setting up the generator by calling | |
| 19 /// [addGetter], [addSetter], [addSymbol], and [addDeclaration], you can | |
| 20 /// retrieve the generated code using the following three methods: | |
| 21 /// | |
| 22 /// * [writeImports] writes a list of imports directives, | |
| 23 /// * [writeTopLevelDeclarations] writes additional declarations used to | |
| 24 /// represent mixin classes by name in the generated code. | |
| 25 /// * [writeStaticConfiguration] writes the actual code that allocates the | |
| 26 /// static configuration. | |
| 27 /// | |
| 28 /// You'd need to include all three in your generated code, since the | |
| 29 /// initialization code refers to symbols that are only available from the | |
| 30 /// generated imports or the generated top-level declarations. | |
| 31 class SmokeCodeGenerator { | |
| 32 // Note: we use SplayTreeSet/Map here and below to keep generated code sorted. | |
| 33 /// Names used as getters via smoke. | |
| 34 final Set<String> _getters = new SplayTreeSet(); | |
| 35 | |
| 36 /// Names used as setters via smoke. | |
| 37 final Set<String> _setters = new SplayTreeSet(); | |
| 38 | |
| 39 /// Subclass relations needed to run smoke queries. | |
| 40 final Map<TypeIdentifier, TypeIdentifier> _parents = new SplayTreeMap(); | |
| 41 | |
| 42 /// Declarations requested via `smoke.getDeclaration or `smoke.query`. | |
| 43 final Map<TypeIdentifier, Map<String, _DeclarationCode>> _declarations = | |
| 44 new SplayTreeMap(); | |
| 45 | |
| 46 /// Static methods used on each type. | |
| 47 final Map<TypeIdentifier, Set<String>> _staticMethods = new SplayTreeMap(); | |
| 48 | |
| 49 /// Names that are used both as strings and symbols. | |
| 50 final Set<String> _names = new SplayTreeSet(); | |
| 51 | |
| 52 /// Prefixes associated with imported libraries. | |
| 53 final Map<String, String> _libraryPrefix = {}; | |
| 54 | |
| 55 /// Register that [name] is used as a getter in the code. | |
| 56 void addGetter(String name) { | |
| 57 _getters.add(name); | |
| 58 } | |
| 59 | |
| 60 /// Register that [name] is used as a setter in the code. | |
| 61 void addSetter(String name) { | |
| 62 _setters.add(name); | |
| 63 } | |
| 64 | |
| 65 /// Register that [name] might be needed as a symbol. | |
| 66 void addSymbol(String name) { | |
| 67 _names.add(name); | |
| 68 } | |
| 69 | |
| 70 /// Register that `cls.name` is used as a static method in the code. | |
| 71 void addStaticMethod(TypeIdentifier cls, String name) { | |
| 72 var methods = | |
| 73 _staticMethods.putIfAbsent(cls, () => new SplayTreeSet<String>()); | |
| 74 _addLibrary(cls.importUrl); | |
| 75 methods.add(name); | |
| 76 } | |
| 77 | |
| 78 int _mixins = 0; | |
| 79 | |
| 80 /// Creates a new type to represent a mixin. Use [comment] to help users | |
| 81 /// figure out what mixin is being represented. | |
| 82 TypeIdentifier createMixinType([String comment = '']) => | |
| 83 new TypeIdentifier(null, '_M${_mixins++}', comment); | |
| 84 | |
| 85 /// Register that we care to know that [child] extends [parent]. | |
| 86 void addParent(TypeIdentifier child, TypeIdentifier parent) { | |
| 87 var existing = _parents[child]; | |
| 88 if (existing != null) { | |
| 89 if (existing == parent) return; | |
| 90 throw new StateError('$child already has a different parent associated' | |
| 91 '($existing instead of $parent)'); | |
| 92 } | |
| 93 _addLibrary(child.importUrl); | |
| 94 _addLibrary(parent.importUrl); | |
| 95 _parents[child] = parent; | |
| 96 } | |
| 97 | |
| 98 /// Register a declaration of a field, property, or method. Note that one and | |
| 99 /// only one of [isField], [isMethod], or [isProperty] should be set at a | |
| 100 /// given time. | |
| 101 void addDeclaration(TypeIdentifier cls, String name, TypeIdentifier type, | |
| 102 {bool isField: false, bool isProperty: false, bool isMethod: false, | |
| 103 bool isFinal: false, bool isStatic: false, | |
| 104 List<ConstExpression> annotations: const []}) { | |
| 105 final count = (isField ? 1 : 0) + (isProperty ? 1 : 0) + (isMethod ? 1 : 0); | |
| 106 if (count != 1) { | |
| 107 throw new ArgumentError('Declaration must be one (and only one) of the ' | |
| 108 'following: a field, a property, or a method.'); | |
| 109 } | |
| 110 var kind = isField ? 'FIELD' : isProperty ? 'PROPERTY' : 'METHOD'; | |
| 111 _declarations.putIfAbsent( | |
| 112 cls, () => new SplayTreeMap<String, _DeclarationCode>()); | |
| 113 _addLibrary(cls.importUrl); | |
| 114 var map = _declarations[cls]; | |
| 115 | |
| 116 for (var exp in annotations) { | |
| 117 for (var lib in exp.librariesUsed) { | |
| 118 _addLibrary(lib); | |
| 119 } | |
| 120 } | |
| 121 | |
| 122 _addLibrary(type.importUrl); | |
| 123 var decl = | |
| 124 new _DeclarationCode(name, type, kind, isFinal, isStatic, annotations); | |
| 125 if (map.containsKey(name) && map[name] != decl) { | |
| 126 throw new StateError('$type.$name already has a different declaration' | |
| 127 ' (${map[name]} instead of $decl).'); | |
| 128 } | |
| 129 map[name] = decl; | |
| 130 } | |
| 131 | |
| 132 /// Register that we might try to read declarations of [type], even if no | |
| 133 /// declaration exists. This informs the smoke system that querying for a | |
| 134 /// member in this class might be intentional and not an error. | |
| 135 void addEmptyDeclaration(TypeIdentifier type) { | |
| 136 _addLibrary(type.importUrl); | |
| 137 _declarations.putIfAbsent( | |
| 138 type, () => new SplayTreeMap<String, _DeclarationCode>()); | |
| 139 } | |
| 140 | |
| 141 /// Writes to [buffer] a line for each import that is needed by the generated | |
| 142 /// code. The code added by [writeStaticConfiguration] depends on these | |
| 143 /// imports. | |
| 144 void writeImports(StringBuffer buffer) { | |
| 145 DEFAULT_IMPORTS.forEach((i) => buffer.writeln(i)); | |
| 146 _libraryPrefix.forEach((url, prefix) { | |
| 147 buffer.writeln("import '$url' as $prefix;"); | |
| 148 }); | |
| 149 } | |
| 150 | |
| 151 /// Writes to [buffer] top-level declarations that are used by the code | |
| 152 /// generated in [writeStaticConfiguration]. These are typically declarations | |
| 153 /// of empty classes that are then used as placeholders for mixin | |
| 154 /// superclasses. | |
| 155 void writeTopLevelDeclarations(StringBuffer buffer) { | |
| 156 var types = new Set() | |
| 157 ..addAll(_parents.keys) | |
| 158 ..addAll(_parents.values) | |
| 159 ..addAll(_declarations.keys) | |
| 160 ..addAll(_declarations.values.expand((m) => m.values.map((d) => d.type))) | |
| 161 ..removeWhere((t) => t.importUrl != null); | |
| 162 for (var type in types) { | |
| 163 buffer.write('abstract class ${type.name} {}'); | |
| 164 if (type.comment != null) buffer.write(' // ${type.comment}'); | |
| 165 buffer.writeln(); | |
| 166 } | |
| 167 } | |
| 168 | |
| 169 /// Appends to [buffer] code that will create smoke's static configuration. | |
| 170 /// For example, the code might be of the form: | |
| 171 /// | |
| 172 /// new StaticConfiguration( | |
| 173 /// getters: { | |
| 174 /// #i: (o) => o.i, | |
| 175 /// ... | |
| 176 /// names: { | |
| 177 /// #i: "i", | |
| 178 /// }) | |
| 179 /// | |
| 180 /// Callers of this code can assign this expression to a variable, and should | |
| 181 /// generate code that invokes `useGeneratedCode`. | |
| 182 /// | |
| 183 /// The optional [indent] argument is used for formatting purposes. All | |
| 184 /// entries in each map (getters, setters, names, declarations, parents) are | |
| 185 /// sorted alphabetically. | |
| 186 /// | |
| 187 /// **Note**: this code assumes that imports from [writeImports] and top-level | |
| 188 /// declarations from [writeTopLevelDeclarations] are included in the same | |
| 189 /// library where this code will live. | |
| 190 void writeStaticConfiguration(StringBuffer buffer, [int indent = 2]) { | |
| 191 final spaces = ' ' * (indent + 4); | |
| 192 var args = {}; | |
| 193 | |
| 194 if (_getters.isNotEmpty) { | |
| 195 args['getters'] = _getters.map((n) => '${_symbol(n)}: (o) => o.$n'); | |
| 196 } | |
| 197 if (_setters.isNotEmpty) { | |
| 198 args['setters'] = | |
| 199 _setters.map((n) => '${_symbol(n)}: (o, v) { o.$n = v; }'); | |
| 200 } | |
| 201 | |
| 202 if (_parents.isNotEmpty) { | |
| 203 var parentsMap = []; | |
| 204 _parents.forEach((child, parent) { | |
| 205 var parent = _parents[child]; | |
| 206 parentsMap.add('${child.asCode(_libraryPrefix)}: ' | |
| 207 '${parent.asCode(_libraryPrefix)}'); | |
| 208 }); | |
| 209 args['parents'] = parentsMap; | |
| 210 } | |
| 211 | |
| 212 if (_declarations.isNotEmpty) { | |
| 213 var declarations = []; | |
| 214 _declarations.forEach((type, members) { | |
| 215 final sb = new StringBuffer() | |
| 216 ..write(type.asCode(_libraryPrefix)) | |
| 217 ..write(': '); | |
| 218 if (members.isEmpty) { | |
| 219 sb.write('{}'); | |
| 220 } else { | |
| 221 sb.write('{\n'); | |
| 222 members.forEach((name, decl) { | |
| 223 var decl = members[name].asCode(_libraryPrefix); | |
| 224 sb.write('${spaces} ${_symbol(name)}: $decl,\n'); | |
| 225 }); | |
| 226 sb.write('${spaces} }'); | |
| 227 } | |
| 228 declarations.add(sb.toString()); | |
| 229 }); | |
| 230 args['declarations'] = declarations; | |
| 231 } | |
| 232 | |
| 233 if (_staticMethods.isNotEmpty) { | |
| 234 var methods = []; | |
| 235 _staticMethods.forEach((type, members) { | |
| 236 var className = type.asCode(_libraryPrefix); | |
| 237 final sb = new StringBuffer() | |
| 238 ..write(className) | |
| 239 ..write(': '); | |
| 240 if (members.isEmpty) { | |
| 241 sb.write('{}'); | |
| 242 } else { | |
| 243 sb.write('{\n'); | |
| 244 for (var name in members) { | |
| 245 sb.write('${spaces} ${_symbol(name)}: $className.$name,\n'); | |
| 246 } | |
| 247 sb.write('${spaces} }'); | |
| 248 } | |
| 249 methods.add(sb.toString()); | |
| 250 }); | |
| 251 args['staticMethods'] = methods; | |
| 252 } | |
| 253 | |
| 254 if (_names.isNotEmpty) { | |
| 255 args['names'] = _names.map((n) => "${_symbol(n)}: r'$n'"); | |
| 256 } | |
| 257 | |
| 258 buffer | |
| 259 ..writeln('new StaticConfiguration(') | |
| 260 ..write('${spaces}checkedMode: false'); | |
| 261 | |
| 262 args.forEach((name, mapContents) { | |
| 263 buffer.writeln(','); | |
| 264 // TODO(sigmund): use const map when Type can be keys (dartbug.com/17123) | |
| 265 buffer.writeln('${spaces}$name: {'); | |
| 266 for (var entry in mapContents) { | |
| 267 buffer.writeln('${spaces} $entry,'); | |
| 268 } | |
| 269 buffer.write('${spaces}}'); | |
| 270 }); | |
| 271 buffer.write(')'); | |
| 272 } | |
| 273 | |
| 274 /// Adds a library that needs to be imported. | |
| 275 void _addLibrary(String url) { | |
| 276 if (url == null || url == 'dart:core') return; | |
| 277 _libraryPrefix.putIfAbsent(url, () => 'smoke_${_libraryPrefix.length}'); | |
| 278 } | |
| 279 } | |
| 280 | |
| 281 /// Information used to generate code that allocates a `Declaration` object. | |
| 282 class _DeclarationCode extends ConstExpression { | |
| 283 final String name; | |
| 284 final TypeIdentifier type; | |
| 285 final String kind; | |
| 286 final bool isFinal; | |
| 287 final bool isStatic; | |
| 288 final List<ConstExpression> annotations; | |
| 289 | |
| 290 _DeclarationCode(this.name, this.type, this.kind, this.isFinal, this.isStatic, | |
| 291 this.annotations); | |
| 292 | |
| 293 List<String> get librariesUsed => [] | |
| 294 ..addAll(type.librariesUsed) | |
| 295 ..addAll(annotations.expand((a) => a.librariesUsed)); | |
| 296 | |
| 297 String asCode(Map<String, String> libraryPrefixes) { | |
| 298 var sb = new StringBuffer(); | |
| 299 sb.write('const Declaration(${_symbol(name)}, ' | |
| 300 '${type.asCode(libraryPrefixes)}'); | |
| 301 if (kind != 'FIELD') sb.write(', kind: $kind'); | |
| 302 if (isFinal) sb.write(', isFinal: true'); | |
| 303 if (isStatic) sb.write(', isStatic: true'); | |
| 304 if (annotations != null && annotations.isNotEmpty) { | |
| 305 sb.write(', annotations: const ['); | |
| 306 bool first = true; | |
| 307 for (var e in annotations) { | |
| 308 if (!first) sb.write(', '); | |
| 309 first = false; | |
| 310 sb.write(e.asCode(libraryPrefixes)); | |
| 311 } | |
| 312 sb.write(']'); | |
| 313 } | |
| 314 sb.write(')'); | |
| 315 return sb.toString(); | |
| 316 } | |
| 317 | |
| 318 String toString() => | |
| 319 '(decl: $type.$name - $kind, $isFinal, $isStatic, $annotations)'; | |
| 320 operator ==(other) => other is _DeclarationCode && | |
| 321 name == other.name && | |
| 322 type == other.type && | |
| 323 kind == other.kind && | |
| 324 isFinal == other.isFinal && | |
| 325 isStatic == other.isStatic && | |
| 326 compareLists(annotations, other.annotations); | |
| 327 int get hashCode => name.hashCode + (31 * type.hashCode); | |
| 328 } | |
| 329 | |
| 330 /// A constant expression that can be used as an annotation. | |
| 331 abstract class ConstExpression { | |
| 332 | |
| 333 /// Returns the library URLs that needs to be imported for this | |
| 334 /// [ConstExpression] to be a valid annotation. | |
| 335 List<String> get librariesUsed; | |
| 336 | |
| 337 /// Return a string representation of the code in this expression. | |
| 338 /// [libraryPrefixes] describes what prefix has been associated with each | |
| 339 /// import url mentioned in [libraryUsed]. | |
| 340 String asCode(Map<String, String> libraryPrefixes); | |
| 341 | |
| 342 ConstExpression(); | |
| 343 | |
| 344 /// Create a string expression of the form `'string'`, where [string] is | |
| 345 /// normalized so we can correctly wrap it in single quotes. | |
| 346 factory ConstExpression.string(String string) { | |
| 347 var value = string.replaceAll(r'\', r'\\').replaceAll(r"'", r"\'"); | |
| 348 return new CodeAsConstExpression("'$value'"); | |
| 349 } | |
| 350 | |
| 351 /// Create an expression of the form `prefix.variable_name`. | |
| 352 factory ConstExpression.identifier(String importUrl, String name) => | |
| 353 new TopLevelIdentifier(importUrl, name); | |
| 354 | |
| 355 /// Create an expression of the form `prefix.Constructor(v1, v2, p3: v3)`. | |
| 356 factory ConstExpression.constructor(String importUrl, String name, | |
| 357 List<ConstExpression> positionalArgs, | |
| 358 Map<String, ConstExpression> namedArgs) => | |
| 359 new ConstructorExpression(importUrl, name, positionalArgs, namedArgs); | |
| 360 } | |
| 361 | |
| 362 /// A constant expression written as a String. Used when the code is self | |
| 363 /// contained and it doesn't depend on any imported libraries. | |
| 364 class CodeAsConstExpression extends ConstExpression { | |
| 365 String code; | |
| 366 List<String> get librariesUsed => const []; | |
| 367 | |
| 368 CodeAsConstExpression(this.code); | |
| 369 | |
| 370 String asCode(Map<String, String> libraryPrefixes) => code; | |
| 371 | |
| 372 String toString() => '(code: $code)'; | |
| 373 operator ==(other) => other is CodeAsConstExpression && code == other.code; | |
| 374 int get hashCode => code.hashCode; | |
| 375 } | |
| 376 | |
| 377 /// Describes a reference to some symbol that is exported from a library. This | |
| 378 /// is typically used to refer to a type or a top-level variable from that | |
| 379 /// library. | |
| 380 class TopLevelIdentifier extends ConstExpression { | |
| 381 final String importUrl; | |
| 382 final String name; | |
| 383 TopLevelIdentifier(this.importUrl, this.name); | |
| 384 | |
| 385 List<String> get librariesUsed => [importUrl]; | |
| 386 String asCode(Map<String, String> libraryPrefixes) { | |
| 387 if (importUrl == 'dart:core' || importUrl == null) { | |
| 388 // TODO(jmesserly): analyzer doesn't consider `dynamic` to be a constant, | |
| 389 // so use Object as a workaround: | |
| 390 // https://code.google.com/p/dart/issues/detail?id=22989 | |
| 391 return name == 'dynamic' ? 'Object' : name; | |
| 392 } | |
| 393 return '${libraryPrefixes[importUrl]}.$name'; | |
| 394 } | |
| 395 | |
| 396 String toString() => '(identifier: $importUrl, $name)'; | |
| 397 operator ==(other) => other is TopLevelIdentifier && | |
| 398 name == other.name && | |
| 399 importUrl == other.importUrl; | |
| 400 int get hashCode => 31 * importUrl.hashCode + name.hashCode; | |
| 401 } | |
| 402 | |
| 403 /// Represents an expression that invokes a const constructor. | |
| 404 class ConstructorExpression extends ConstExpression { | |
| 405 final String importUrl; | |
| 406 final String name; | |
| 407 final List<ConstExpression> positionalArgs; | |
| 408 final Map<String, ConstExpression> namedArgs; | |
| 409 ConstructorExpression( | |
| 410 this.importUrl, this.name, this.positionalArgs, this.namedArgs); | |
| 411 | |
| 412 List<String> get librariesUsed => [importUrl] | |
| 413 ..addAll(positionalArgs.expand((e) => e.librariesUsed)) | |
| 414 ..addAll(namedArgs.values.expand((e) => e.librariesUsed)); | |
| 415 | |
| 416 String asCode(Map<String, String> libraryPrefixes) { | |
| 417 var sb = new StringBuffer(); | |
| 418 sb.write('const '); | |
| 419 if (importUrl != 'dart:core' && importUrl != null) { | |
| 420 sb.write('${libraryPrefixes[importUrl]}.'); | |
| 421 } | |
| 422 sb.write('$name('); | |
| 423 bool first = true; | |
| 424 for (var e in positionalArgs) { | |
| 425 if (!first) sb.write(', '); | |
| 426 first = false; | |
| 427 sb.write(e.asCode(libraryPrefixes)); | |
| 428 } | |
| 429 namedArgs.forEach((name, value) { | |
| 430 if (!first) sb.write(', '); | |
| 431 first = false; | |
| 432 sb.write('$name: '); | |
| 433 sb.write(value.asCode(libraryPrefixes)); | |
| 434 }); | |
| 435 sb.write(')'); | |
| 436 return sb.toString(); | |
| 437 } | |
| 438 | |
| 439 String toString() => '(ctor: $importUrl, $name, $positionalArgs, $namedArgs)'; | |
| 440 operator ==(other) => other is ConstructorExpression && | |
| 441 name == other.name && | |
| 442 importUrl == other.importUrl && | |
| 443 compareLists(positionalArgs, other.positionalArgs) && | |
| 444 compareMaps(namedArgs, other.namedArgs); | |
| 445 int get hashCode => 31 * importUrl.hashCode + name.hashCode; | |
| 446 } | |
| 447 | |
| 448 /// Describes a type identifier, with the library URL where the type is defined. | |
| 449 // TODO(sigmund): consider adding support for imprecise TypeIdentifiers, which | |
| 450 // may be used by tools that want to generate code without using the analyzer | |
| 451 // (they can syntactically tell the type comes from one of N imports). | |
| 452 class TypeIdentifier extends TopLevelIdentifier | |
| 453 implements Comparable<TypeIdentifier> { | |
| 454 final String comment; | |
| 455 TypeIdentifier(importUrl, typeName, [this.comment]) | |
| 456 : super(importUrl, typeName); | |
| 457 | |
| 458 // We implement [Comparable] to sort out entries in the generated code. | |
| 459 int compareTo(TypeIdentifier other) { | |
| 460 if (importUrl == null && other.importUrl != null) return 1; | |
| 461 if (importUrl != null && other.importUrl == null) return -1; | |
| 462 var c1 = importUrl == null ? 0 : importUrl.compareTo(other.importUrl); | |
| 463 return c1 != 0 ? c1 : name.compareTo(other.name); | |
| 464 } | |
| 465 | |
| 466 String toString() => '(type-identifier: $importUrl, $name, $comment)'; | |
| 467 bool operator ==(other) => other is TypeIdentifier && | |
| 468 importUrl == other.importUrl && | |
| 469 name == other.name && | |
| 470 comment == other.comment; | |
| 471 int get hashCode => super.hashCode; | |
| 472 } | |
| 473 | |
| 474 /// Default set of imports added by [SmokeCodeGenerator]. | |
| 475 const DEFAULT_IMPORTS = const [ | |
| 476 "import 'package:smoke/smoke.dart' show Declaration, PROPERTY, METHOD;", | |
| 477 "import 'package:smoke/static.dart' show " | |
| 478 "useGeneratedCode, StaticConfiguration;", | |
| 479 ]; | |
| 480 | |
| 481 _symbol(String name) { | |
| 482 if (!_publicSymbolPattern.hasMatch(name)) { | |
| 483 throw new StateError('invalid symbol name: "$name"'); | |
| 484 } | |
| 485 return _literalSymbolPattern.hasMatch(name) | |
| 486 ? '#$name' | |
| 487 : "const Symbol('$name')"; | |
| 488 } | |
| 489 | |
| 490 // TODO(sigmund): is this included in some library we can import? I derived the | |
| 491 // definitions below from sdk/lib/internal/symbol.dart. | |
| 492 | |
| 493 /// Reserved words in Dart. | |
| 494 const String _reservedWordRE = | |
| 495 r'(?:assert|break|c(?:a(?:se|tch)|lass|on(?:st|tinue))|d(?:efault|o)|' | |
| 496 r'e(?:lse|num|xtends)|f(?:alse|inal(?:ly)?|or)|i[fns]|n(?:ew|ull)|' | |
| 497 r'ret(?:hrow|urn)|s(?:uper|witch)|t(?:h(?:is|row)|r(?:ue|y))|' | |
| 498 r'v(?:ar|oid)|w(?:hile|ith))'; | |
| 499 | |
| 500 /// Public identifier: a valid identifier (not a reserved word) that doesn't | |
| 501 /// start with '_'. | |
| 502 const String _publicIdentifierRE = | |
| 503 r'(?!' '$_reservedWordRE' r'\b(?!\$))[a-zA-Z$][\w$]*'; | |
| 504 | |
| 505 /// Pattern that matches operators only. | |
| 506 final RegExp _literalSymbolPattern = | |
| 507 new RegExp('^(?:$_publicIdentifierRE(?:\$|[.](?!\$)))+?\$'); | |
| 508 | |
| 509 /// Operator names allowed as symbols. The name of the oeprators is the same as | |
| 510 /// the operator itself except for unary minus, where the name is "unary-". | |
| 511 const String _operatorRE = | |
| 512 r'(?:[\-+*/%&|^]|\[\]=?|==|~/?|<[<=]?|>[>=]?|unary-)'; | |
| 513 | |
| 514 /// Pattern that matches public symbols. | |
| 515 final RegExp _publicSymbolPattern = new RegExp( | |
| 516 '^(?:$_operatorRE\$|$_publicIdentifierRE(?:=?\$|[.](?!\$)))+?\$'); | |
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Chromium Code Reviews
Issue 1400473008:
Roll Observatory packages and add a roll script (Closed)
Base URL: git@github.com:dart-lang/observatory_pub_packages.git@master