dart / co19 / refs/heads/nnbd / . / LanguageFeatures / Subtyping / dynamic / generated / positional_function_types_fail_global_variable_fail_A04_t01.dart

/* | |

* Copyright (c) 2018, the Dart project authors. Please see the AUTHORS file | |

* for details. All rights reserved. Use of this source code is governed by a | |

* BSD-style license that can be found in the LICENSE file. | |

*/ | |

/** | |

* @assertion A type T0 is a subtype of a type T1 (written T0 <: T1) when: | |

* Positional Function Types: T0 is U0 Function<X0 extends B00, ... , | |

* Xk extends B0k>(V0 x0, ..., Vn xn, [Vn+1 xn+1, ..., Vm xm]) | |

* | |

* and T1 is U1 Function<Y0 extends B10, ..., Yk extends B1k>(S0 y0, ..., | |

* Sp yp, [Sp+1 yp+1, ..., Sq yq]) | |

* and p >= n | |

* and m >= q | |

* and Si[Z0/Y0, ..., Zk/Yk] <: Vi[Z0/X0, ..., Zk/Xk] for i in 0...q | |

* and U0[Z0/X0, ..., Zk/Xk] <: U1[Z0/Y0, ..., Zk/Yk] | |

* and B0i[Z0/X0, ..., Zk/Xk] === B1i[Z0/Y0, ..., Zk/Yk] for i in 0...k | |

* where the Zi are fresh type variables with bounds B0i[Z0/X0, ..., Zk/Xk] | |

* @description Check that if p > n and m < q then T0 is not a subtype of T1 | |

* @author sgrekhov@unipro.ru | |

*/ | |

/** | |

* @description Check that if type T0 is not a subtype of a type T1, then | |

* instance of T0 cannot be be assigned to the to global variable of type T1 | |

* @author sgrekhov@unipro.ru | |

*/ | |

/* | |

* This test is generated from positional_function_types_fail_A04.dart and | |

* global_variable_fail_x01.dart. | |

* Don't modify it. If you want to change this file, change one of the files | |

* above and then run generator.dart to regenerate the tests. | |

*/ | |

import '../../utils/common.dart'; | |

import '../../../../Utils/expect.dart'; | |

// SharedOptions=--enable-experiment=non-nullable | |

class U0 extends U1 {} | |

class U1 {} | |

class V0 {} | |

class V1 {} | |

class V2 {} | |

class V3 {} | |

class S0 extends V0 {} | |

class S1 extends V1 {} | |

class S2 extends V2 {} | |

class S3 extends V3 {} | |

typedef T0 = U0 Function(V0 x0, V1 x1, [V2? x2]); | |

typedef T1 = U1 Function(S0 y0, S1 y1, S2 y2, [S3? y3]); | |

U0 t0Func(V0 x0, V1 x1, [V2? x2]) => new U0(); | |

U1 t1Func(S0 y0, S1 y1, S2 y2, [S3? y3]) => new U1(); | |

T0 t0Instance = t0Func; | |

T1 t1Instance = t1Func; | |

const t1Default = t1Func; | |

class GlobalVariableTest { | |

GlobalVariableTest() { | |

t1Instance = forgetType(t0Instance); | |

} | |

GlobalVariableTest.valid() {} | |

foo() { | |

t1Instance = forgetType(t0Instance); | |

} | |

static test() { | |

t1Instance = forgetType(t0Instance); | |

} | |

} | |

main() { | |

bar () { | |

t1Instance = forgetType(t0Instance); | |

} | |

Expect.throws(() { | |

t1Instance = forgetType(t0Instance); | |

}, (e) => e is TypeError); | |

Expect.throws(() { | |

bar(); | |

}, (e) => e is TypeError); | |

Expect.throws(() { | |

new GlobalVariableTest(); | |

}, (e) => e is TypeError); | |

Expect.throws(() { | |

new GlobalVariableTest.valid().foo(); | |

}, (e) => e is TypeError); | |

Expect.throws(() { | |

GlobalVariableTest.test(); | |

}, (e) => e is TypeError); | |

} |