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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 * @author sgrekhov@unipro.ru */ // 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? y2, S3? y3]); U0 t0Func(V0 x0, V1 x1, [V2? x2, V3? x3, V4? x4]) => new U0(); U1 t1Func(S0 y0, [S1? y1, S2? y2, S3? y3]) => new U1(); T0 t0Instance = t0Func; T1 t1Instance = t1Func; const t1Default = t1Func; //# @T0 = T0 //# @T1 = T1