// Part of the Carbon Language project, under the Apache License v2.0 with LLVM // Exceptions. See /LICENSE for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // // NOAUTOUPDATE package ExplorerTest api; base class A { virtual fn Foo[self: Self]() {} } class B { extend base: A; // CHECK:STDERR: COMPILATION ERROR: fail_override_virtual_with_non_virtual.carbon:[[@LINE+1]]: Error declaring `Foo`: method is declared virtual in base class, use `impl` to override it. fn Foo[self: Self]() {} } fn Main() -> i32 { return 0; }