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 /* * 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(V0 x0, ..., Vn xn, [Vn+1 xn+1, ..., Vm xm]) * * and T1 is U1 Function(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. * Test generic types. * @author sgrekhov@unipro.ru * @author ngl@unipro.ru */ /** * @description Check that if type T0 not a subtype of a type T1, then instance * of T0 cannot be be used as a return value of type T1 * @author sgrekhov@unipro.ru */ /* * This test is generated from positional_function_types_fail_A08.dart and * return_value_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 A {} class C extends A {} class U0 extends U1 {} class U1 {} class B0 {} class B1 {} 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, int> Function( V0 x0, [V1? x1]); typedef T1 = U1 Function( S0, int> y0, S1, int> y1, [S2, int>? y2, S3, int>? y3]); U0, int> t0Func( V0 x0,[V1? x1]) => new U0, int>(); U1 t1Func( S0, int> y0, S1, int> y1, [S2, int>? y2, S3, int>? y3]) => new U1(); T0 t0Instance = t0Func; T1 t1Instance = t1Func; const t1Default = t1Func; T1 returnValueFunc() => forgetType(t0Instance); class ReturnValueTest { static T1 staticTestMethod() => forgetType(t0Instance); T1 testMethod() => forgetType(t0Instance); T1 get testGetter => forgetType(t0Instance); } class ReturnValueGen { X testMethod() => forgetType(t0Instance); X get testGetter => forgetType(t0Instance); } main() { T1 returnValueLocalFunc() => forgetType(t0Instance); Expect.throws(() {returnValueFunc();}, (e) => e is TypeError); Expect.throws(() {returnValueLocalFunc();}, (e) => e is TypeError); Expect.throws(() {ReturnValueTest.staticTestMethod();}, (e) => e is TypeError); Expect.throws(() {new ReturnValueTest().testMethod();}, (e) => e is TypeError); Expect.throws(() {new ReturnValueTest().testGetter;}, (e) => e is TypeError); // Test type parameters }