dart / co19 / refs/heads/nnbd / . / LanguageFeatures / Subtyping / dynamic / generated / named_function_types_fail_local_variable_fail_A31_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: | |

* Named Function Types: T0 is U0 Function<X0 extends B00, ..., Xk extends B0k> | |

* (T0 x0, ..., Tn xn, {Tn+1 xn+1, ..., Tm xm}) | |

* | |

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

* {Sn+1 yn+1, ..., Sq yq}) | |

* and {yn+1, ... , yq} subsetof {xn+1, ... , xm} | |

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

* and Si[Z0/Y0, ..., Zk/Yk] <: Tj[Z0/X0, ..., Zk/Xk] for i in n+1...q, yj = xi | |

* 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 there is i in n+1...q such that | |

* Si[Z0/Y0, ..., Zk/Yk] is not subtype of Tj[Z0/X0, ..., Zk/Xk], 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 local variable of type T1 | |

* @author sgrekhov@unipro.ru | |

*/ | |

/* | |

* This test is generated from named_function_types_fail_A31.dart and | |

* local_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 V4 {} | |

class S0 extends V0 {} | |

class S1 extends V1 {} | |

class S2 {} | |

class S3 extends V3 {} | |

typedef T0 = U0 Function(V0 x0, V1 x1, {V2? x2, V3? x3, V4? x4}); | |

typedef T1 = U1 Function(S0 y0, S1 y1, {S2? x2, S3? x3}); // S2 is not subtype of V1 | |

U0 t0Func(V0 x0, V1 x1, {V2? x2, V3? x3, V4? x4}) => new U0(); | |

U1 t1Func(S0 y0, S1 y1, {S2? x2, S3? x3}) => new U1(); | |

T0 t0Instance = t0Func; | |

T1 t1Instance = t1Func; | |

const t1Default = t1Func; | |

class LocalVariableTest { | |

LocalVariableTest() { | |

T1 t1 = forgetType(t0Instance); | |

} | |

LocalVariableTest.valid() {} | |

static staticTest() { | |

T1 t1 = forgetType(t0Instance); | |

} | |

test() { | |

T1 t1 = forgetType(t0Instance); | |

} | |

} | |

main() { | |

bar () { | |

T1 t1 = forgetType(t0Instance); | |

} | |

Expect.throws(() { | |

T1 t1 = forgetType(t0Instance); | |

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

Expect.throws(() { | |

bar(); | |

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

Expect.throws(() { | |

new LocalVariableTest(); | |

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

Expect.throws(() { | |

new LocalVariableTest.valid().test(); | |

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

Expect.throws(() { | |

LocalVariableTest.staticTest(); | |

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

} |