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| 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, 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 library dart2js.typechecker; | 5 library dart2js.typechecker; |
| 6 | 6 |
| 7 import 'common/names.dart' show Identifiers; | 7 import 'common/names.dart' show Identifiers; |
| 8 import 'common/resolution.dart' show Resolution; | 8 import 'common/resolution.dart' show Resolution; |
| 9 import 'common/tasks.dart' show CompilerTask; | 9 import 'common/tasks.dart' show CompilerTask; |
| 10 import 'common.dart'; | 10 import 'common.dart'; |
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| 1769 if (type.isVoid) { | 1769 if (type.isVoid) { |
| 1770 reportTypeWarning(node.type, MessageKind.VOID_VARIABLE); | 1770 reportTypeWarning(node.type, MessageKind.VOID_VARIABLE); |
| 1771 type = const DynamicType(); | 1771 type = const DynamicType(); |
| 1772 } | 1772 } |
| 1773 return type; | 1773 return type; |
| 1774 } | 1774 } |
| 1775 | 1775 |
| 1776 void analyzeVariableInitializer( | 1776 void analyzeVariableInitializer( |
| 1777 Spannable spannable, DartType declaredType, Node initializer) { | 1777 Spannable spannable, DartType declaredType, Node initializer) { |
| 1778 if (initializer == null) return; | 1778 if (initializer == null) return; |
| 1779 | 1779 |
| 1780 DartType expressionType = analyzeNonVoid(initializer); | 1780 DartType expressionType = analyzeNonVoid(initializer); |
| 1781 checkAssignable(spannable, expressionType, declaredType); | 1781 checkAssignable(spannable, expressionType, declaredType); |
| 1782 } | 1782 } |
| 1783 | 1783 |
| 1784 DartType visitVariableDefinitions(VariableDefinitions node) { | 1784 DartType visitVariableDefinitions(VariableDefinitions node) { |
| 1785 DartType type = analyzeVariableTypeAnnotation(node); | 1785 DartType type = analyzeVariableTypeAnnotation(node); |
| 1786 for (Link<Node> link = node.definitions.nodes; | 1786 for (Link<Node> link = node.definitions.nodes; |
| 1787 !link.isEmpty; | 1787 !link.isEmpty; |
| 1788 link = link.tail) { | 1788 link = link.tail) { |
| 1789 Node definition = link.head; | 1789 Node definition = link.head; |
| 1790 invariant(definition, definition is Identifier || definition is SendSet, | 1790 invariant(definition, definition is Identifier || definition is SendSet, |
| 1791 message: 'expected identifier or initialization'); | 1791 message: 'expected identifier or initialization'); |
| 1792 if (definition is SendSet) { | 1792 if (definition is SendSet) { |
| 1793 SendSet initialization = definition; | 1793 SendSet initialization = definition; |
| 1794 analyzeVariableInitializer( | 1794 analyzeVariableInitializer(initialization.assignmentOperator, type, |
| 1795 initialization.assignmentOperator, | |
| 1796 type, | |
| 1797 initialization.arguments.head); | 1795 initialization.arguments.head); |
| 1798 // TODO(sigmund): explore inferring a type for `var` using the RHS (like | 1796 // TODO(sigmund): explore inferring a type for `var` using the RHS (like |
| 1799 // DDC does), for example: | 1797 // DDC does), for example: |
| 1800 // if (node.type == null && node.modifiers.isVar && | 1798 // if (node.type == null && node.modifiers.isVar && |
| 1801 // !initializer.isDynamic) { | 1799 // !initializer.isDynamic) { |
| 1802 // var variable = elements[definition]; | 1800 // var variable = elements[definition]; |
| 1803 // if (variable != null) { | 1801 // if (variable != null) { |
| 1804 // var typePromotion = new TypePromotion( | 1802 // var typePromotion = new TypePromotion( |
| 1805 // node, variable, initializer); | 1803 // node, variable, initializer); |
| 1806 // registerKnownTypePromotion(typePromotion); | 1804 // registerKnownTypePromotion(typePromotion); |
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| 2049 | 2047 |
| 2050 visitTypedef(Typedef node) { | 2048 visitTypedef(Typedef node) { |
| 2051 // Do not typecheck [Typedef] nodes. | 2049 // Do not typecheck [Typedef] nodes. |
| 2052 } | 2050 } |
| 2053 | 2051 |
| 2054 visitNode(Node node) { | 2052 visitNode(Node node) { |
| 2055 reporter.internalError(node, | 2053 reporter.internalError(node, |
| 2056 'Unexpected node ${node.getObjectDescription()} in the type checker.'); | 2054 'Unexpected node ${node.getObjectDescription()} in the type checker.'); |
| 2057 } | 2055 } |
| 2058 } | 2056 } |
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