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1 // Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 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. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 import 'dart:collection' show HashSet; | 5 import 'dart:collection' show HashSet; |
| 6 |
6 import 'package:analyzer/dart/ast/ast.dart' show Identifier; | 7 import 'package:analyzer/dart/ast/ast.dart' show Identifier; |
7 import 'package:analyzer/dart/element/element.dart'; | 8 import 'package:analyzer/dart/element/element.dart'; |
| 9 |
8 import 'extension_types.dart'; | 10 import 'extension_types.dart'; |
9 | 11 |
10 /// We use a storage slot for fields that override or can be overridden by | 12 class PropertyOverrideResult { |
11 /// getter/setter pairs. | 13 final bool foundGetter; |
12 HashSet<FieldElement> findFieldsNeedingStorage( | 14 final bool foundSetter; |
13 Iterable<CompilationUnitElement> units, ExtensionTypeSet extensionTypes) { | 15 |
14 var overrides = new HashSet<FieldElement>(); | 16 PropertyOverrideResult(this.foundGetter, this.foundSetter); |
15 for (var unit in units) { | 17 } |
16 for (var cls in unit.types) { | 18 |
17 var superclasses = getSuperclasses(cls); | 19 PropertyOverrideResult checkForPropertyOverride(FieldElement field, |
18 for (var field in cls.fields) { | 20 List<ClassElement> superclasses, ExtensionTypeSet extensionTypes) { |
19 if (!field.isSynthetic && !overrides.contains(field)) { | 21 bool foundGetter = false; |
20 checkForPropertyOverride( | 22 bool foundSetter = false; |
21 field, superclasses, overrides, extensionTypes); | 23 |
22 } | 24 for (var superclass in superclasses) { |
23 } | 25 // Stop if we reach a native type. |
24 } | 26 if (extensionTypes.contains(superclass)) break; |
| 27 |
| 28 var superprop = getProperty(superclass, field.library, field.name); |
| 29 if (superprop == null) continue; |
| 30 |
| 31 var getter = superprop.getter; |
| 32 bool hasGetter = getter != null && !getter.isAbstract; |
| 33 if (hasGetter) foundGetter = true; |
| 34 |
| 35 var setter = superprop.setter; |
| 36 bool hasSetter = setter != null && !setter.isAbstract; |
| 37 if (hasSetter) foundSetter = true; |
| 38 |
| 39 // Stop if this is an abstract getter/setter |
| 40 // TODO(jmesserly): why were we doing this? |
| 41 if (!hasGetter && !hasSetter) break; |
25 } | 42 } |
26 | 43 |
27 return overrides; | 44 return new PropertyOverrideResult(foundGetter, foundSetter); |
28 } | |
29 | |
30 void checkForPropertyOverride( | |
31 FieldElement field, | |
32 List<ClassElement> superclasses, | |
33 HashSet<FieldElement> overrides, | |
34 ExtensionTypeSet extensionTypes) { | |
35 assert(!field.isSynthetic); | |
36 | |
37 var library = field.library; | |
38 | |
39 bool found = false; | |
40 for (var superclass in superclasses) { | |
41 var superprop = getProperty(superclass, library, field.name); | |
42 if (superprop != null) { | |
43 // If we find an abstract getter/setter pair, stop the search. | |
44 var getter = superprop.getter; | |
45 var setter = superprop.setter; | |
46 if (!extensionTypes.contains(superclass) && | |
47 (getter == null || getter.isAbstract) && | |
48 (setter == null || setter.isAbstract)) { | |
49 break; | |
50 } | |
51 | |
52 found = true; | |
53 // Record that the super property is overridden. | |
54 if (superprop.library == library) overrides.add(superprop); | |
55 } | |
56 } | |
57 | |
58 // If this we found a super property, then this property overrides it. | |
59 if (found) overrides.add(field); | |
60 } | 45 } |
61 | 46 |
62 FieldElement getProperty( | 47 FieldElement getProperty( |
63 ClassElement cls, LibraryElement fromLibrary, String name) { | 48 ClassElement cls, LibraryElement fromLibrary, String name) { |
64 // Properties from a different library are not accessible. | 49 // Properties from a different library are not accessible. |
65 if (Identifier.isPrivateName(name) && cls.library != fromLibrary) { | 50 if (Identifier.isPrivateName(name) && cls.library != fromLibrary) { |
66 return null; | 51 return null; |
67 } | 52 } |
68 for (var accessor in cls.accessors) { | 53 for (var accessor in cls.accessors) { |
69 var prop = accessor.variable; | 54 var prop = accessor.variable; |
(...skipping 11 matching lines...) Expand all Loading... |
81 if (mixin != null) result.add(mixin); | 66 if (mixin != null) result.add(mixin); |
82 } | 67 } |
83 var supertype = cls.supertype; | 68 var supertype = cls.supertype; |
84 if (supertype == null) break; | 69 if (supertype == null) break; |
85 | 70 |
86 cls = supertype.element; | 71 cls = supertype.element; |
87 result.add(cls); | 72 result.add(cls); |
88 } | 73 } |
89 return result; | 74 return result; |
90 } | 75 } |
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