LanguageFeatures/nnbd/weak/const_type_var_elimination_A01_t01.dart

// Copyright (c) 2020, 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 If performing inference on a const value of a generic class
/// results in inferred type arguments to the generic class which contain free
/// type variables from an enclosing generic class or method, the free type
/// variables shall be eliminated by taking the least closure of the inferred
/// type with respect to the free type variables.
///
///   class G<T> {
///    void foo() {
///    const List<T> c = <T>[]; // Error
///    const List<T> d = [];    // The list literal is inferred as <Never>[]
///    }
///   }
///
/// @description Check that [const List<T>] variable of a generic class [G<T>]
/// is eliminated into [List<Never>].
///
/// @Issue 40977
/// @author iarkh@unipro.ru

// Requirements=nnbd-weak

class G<T> {
  void foo() {
    const List<T> l1 = [];
  }
}

main() {
  G().foo();
}