LanguageFeatures/nnbd/const_evaluation_A09_t02.dart

// Copyright (c) 2021, 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 CONST_CANONICAL_TYPE(R Function<X extends B>(S)) = F*
///   where F = R1 Function<X extends B1>(S1)
///   and R1 = CONST_CANONICAL_TYPE(R)
///   and B1 = CONST_CANONICAL_TYPE(B)
///   and S1 = CONST_CANONICAL_TYPE(S)
/// Note, this generalizes to arbitrary number of type and term parameters.
///
/// @description Checks that
/// `CONST_CANONICAL_TYPE(R Function<X extends B>(S)) = F*`
/// @author iarkh@unipro.ru

import "../../Utils/expect.dart";
import "const_evaluation_lib.dart";

typedef FUNC = int Function<X extends String>(double);

int testme<X extends String>(double d) => throw "Should not reach here";

const c = C<FUNC?>(testme);
const c1 = C<FUNC?>(null);

dynamic d = null;
Never n = throw "Should not reach here";
dynamic d1 = 1;

void test1() => c1.test(testme);
void test2() => c1.test(null);
void test3() => c1.test(d);
void test4() => c1.test(n);
void test5() => c1.test(d1);

main() {
  test1();
  test2();
  test3();
  Expect.throws(() => test4());
  Expect.throws(() => test5());
}