| // Copyright 2014 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| /// This function can be used to call a const constructor in such a way as to |
| /// create a new instance rather than creating the common const instance. |
| /// |
| /// ```dart |
| /// class A { |
| /// const A(this.i); |
| /// final int? i; |
| /// } |
| /// |
| /// void main () { |
| /// // prevent prefer_const_constructors lint |
| /// A(nonconst(null)); |
| /// |
| /// // prevent prefer_const_declarations lint |
| /// final int? $null = nonconst(null); |
| /// final A a = nonconst(const A(null)); |
| /// } |
| /// ``` |
| T nonconst<T>(T t) => t; |
