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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: * Named Function Types: T0 is U0 Function * (T0 x0, ..., Tn xn, {Tn+1 xn+1, ..., Tm xm}) * * and T1 is U1 Function(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 {yn+1, ... , yq} is not subsetof {xn+1, ... , xm}, * then T0 is not a subtype of T1 * @author sgrekhov@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 named_function_types_fail_A11.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 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 extends V2 {} 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? y3}); // y3 is not x3 U0 t0Func(V0 x0, V1 x1, {V2? x2, V3? x3, V4? x4}) => new U0(); U1 t1Func(S0 y0, S1 y1, {S2? x2, S3? 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 //# <-- NotGenericFunctionType Expect.throws(() {new ReturnValueGen().testMethod();}, (e) => e is TypeError); Expect.throws(() {new ReturnValueGen().testGetter;}, (e) => e is TypeError); //# --> }