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| 1 // Copyright (c) 2013, 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 // Test least upper bound through type checking of conditionals. |
| 6 |
| 7 class A { |
| 8 var a; |
| 9 } |
| 10 class B { |
| 11 var b; |
| 12 } |
| 13 class C extends B { |
| 14 var c; |
| 15 } |
| 16 class D extends B { |
| 17 var d; |
| 18 } |
| 19 |
| 20 class E<T> { |
| 21 T e; |
| 22 |
| 23 E(this.e); |
| 24 } |
| 25 class F<T> extends E<T> { |
| 26 T f; |
| 27 |
| 28 F(T f) : this.f = f, super(f); |
| 29 } |
| 30 |
| 31 void main() { |
| 32 testAB(new A(), new B()); |
| 33 testBC(new C(), new C()); |
| 34 testCD(new C(), new D()); |
| 35 testEE(new F<C>(new C()), new F<C>(new C())); |
| 36 testEF(new F<C>(new C()), new F<C>(new C())); |
| 37 } |
| 38 |
| 39 void testAB(A a, B b) { |
| 40 A r1 = true ? a : b; /// 01: ok |
| 41 B r2 = false ? a : b; /// 02: ok |
| 42 (true ? a : b).a = 0; /// 03: static type warning |
| 43 (false ? a : b).b = 0; /// 04: static type warning |
| 44 var c = new C(); |
| 45 (true ? a : c).a = 0; /// 05: ok |
| 46 (false ? c : b).b = 0; /// 06: ok |
| 47 } |
| 48 |
| 49 void testBC(B b, C c) { |
| 50 B r1 = true ? b : c; /// 07: ok |
| 51 C r2 = false ? b : c; /// 08: ok |
| 52 (true ? b : c).b = 0; /// 09: ok |
| 53 (false ? b : c).c = 0; /// 10: static type warning |
| 54 var a = null; |
| 55 (true ? b : a).b = 0; /// 11: ok |
| 56 (false ? a : b).c = 0; /// 12: ok |
| 57 (true ? c : a).b = 0; /// 13: ok |
| 58 (false ? a : c).c = 0; /// 14: ok |
| 59 } |
| 60 |
| 61 void testCD(C c, D d) { |
| 62 C r1 = true ? c : d; /// 15: ok |
| 63 D r2 = false ? c : d; /// 16: ok |
| 64 (true ? c : d).b = 0; /// 17: ok |
| 65 (false ? c : d).b = 0; /// 18: ok |
| 66 (true ? c : d).c = 0; /// 19: static type warning |
| 67 (false ? c : d).d = 0; /// 20: static type warning |
| 68 } |
| 69 |
| 70 void testEE(E<B> e, E<C> f) { |
| 71 // The least upper bound of E<B> and E<C> is Object since the supertypes are |
| 72 // {E<B>, Object} for E<B> and |
| 73 // {E<C>, Object} for E<C> and |
| 74 // Object is the most specific type in the intersection of the supertypes. |
| 75 E<B> r1 = true ? e : f; /// 21: ok |
| 76 F<C> r2 = false ? e : f; /// 22: ok |
| 77 try { |
| 78 A r3 = true ? e : f; /// 23: ok |
| 79 B r4 = false ? e : f; /// 24: ok |
| 80 } catch (e) { |
| 81 // Type error in checked mode. |
| 82 } |
| 83 (true ? e : f).e = null; /// 25: static type warning |
| 84 (false ? e : f).e = null; /// 26: static type warning |
| 85 } |
| 86 |
| 87 void testEF(E<B> e, F<C> f) { |
| 88 // The least upper bound of E<B> and F<C> is Object since the supertypes are |
| 89 // {E<B>, Object} for E<B> and |
| 90 // {F<C>, E<C>, Object} for F<C> and |
| 91 // Object is the most specific type in the intersection of the supertypes. |
| 92 E<B> r1 = true ? e : f; /// 27: ok |
| 93 F<C> r2 = false ? e : f; /// 28: ok |
| 94 try { |
| 95 A r3 = true ? e : f; /// 29: ok |
| 96 B r4 = false ? e : f; /// 30: ok |
| 97 } catch (e) { |
| 98 // Type error in checked mode. |
| 99 } |
| 100 var r5; |
| 101 r5 = (true ? e : f).e; /// 31: static type warning |
| 102 r5 = (false ? e : f).f; /// 32: static type warning |
| 103 } |
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