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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 // Dart test for a function type test that cannot be eliminated at compile time. | 4 // Dart test for a function type test that cannot be eliminated at compile time. |
5 | 5 |
6 isCheckedMode() { | 6 isCheckedMode() { |
7 try { | 7 try { |
8 var i = 1; | 8 var i = 1; |
9 String s = i; | 9 String s = i; |
10 return false; | 10 return false; |
11 } catch(var e) { | 11 } catch (e) { |
12 return true; | 12 return true; |
13 } | 13 } |
14 } | 14 } |
15 | 15 |
16 typedef FList(List l); | 16 typedef FList(List l); |
17 typedef FListInt(List<int> l); | 17 typedef FListInt(List<int> l); |
18 | 18 |
19 FList f() { | 19 FList f() { |
20 return (List<String> l) => null; // Type of function is a subtype of FList. | 20 return (List<String> l) => null; // Type of function is a subtype of FList. |
21 } | 21 } |
22 | 22 |
23 main() { | 23 main() { |
24 bool got_type_error = false; | 24 bool got_type_error = false; |
25 try { | 25 try { |
26 // Static result type of f(), i.e. FList, is a subtype of FListInt. | 26 // Static result type of f(), i.e. FList, is a subtype of FListInt. |
27 // However, run time type of returned function is not a subtype of FListInt. | 27 // However, run time type of returned function is not a subtype of FListInt. |
28 // Run time type check should not be eliminated. | 28 // Run time type check should not be eliminated. |
29 FListInt fli = f(); | 29 FListInt fli = f(); |
30 } catch (TypeError error) { | 30 } on TypeError catch (error) { |
31 got_type_error = true; | 31 got_type_error = true; |
32 } | 32 } |
33 // Type error expected in checked mode only. | 33 // Type error expected in checked mode only. |
34 Expect.isTrue(got_type_error == isCheckedMode()); | 34 Expect.isTrue(got_type_error == isCheckedMode()); |
35 } | 35 } |
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