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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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