tests/language_2/field/decl_missing_var_type_test.dart

// Copyright (c) 2012, 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.
// Dart test program for constructors and initializers.

// @dart = 2.9

// Exercises issue 2997, missing var or type on field declarations should
// generate a compile-time error.

class A {
  _this;
//^^^^^
// [analyzer] SYNTACTIC_ERROR.MISSING_CONST_FINAL_VAR_OR_TYPE
// [cfe] Variables must be declared using the keywords 'const', 'final', 'var' or a type name.
  A(x) : this._this = x;
}

main() {
  new A(0);
}