1 // Copyright (C) 2016-2023 Free Software Foundation, Inc. 2 3 // This program is free software; you can redistribute it and/or modify 4 // it under the terms of the GNU General Public License as published by 5 // the Free Software Foundation; either version 3 of the License, or 6 // (at your option) any later version. 7 // 8 // This program is distributed in the hope that it will be useful, 9 // but WITHOUT ANY WARRANTY; without even the implied warranty of 10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 // GNU General Public License for more details. 12 // 13 // You should have received a copy of the GNU General Public License 14 // along with this program. If not, see <http://www.gnu.org/licenses/>. 15 16 #![allow(dead_code)] 17 #![allow(unused_variables)] 18 #![allow(unused_assignments)] 19 20 21 #[derive(Clone, Copy)] 22 struct Hold<T>(T); 23 24 pub fn identity<T>(x: T) -> T { x } 25 26 fn dowhatever() { () } 27 28 pub fn main() { 29 let a = identity(23u32); 30 let b = identity(23.0f64); 31 32 let d = identity::<u32>(7); 33 34 let e = Hold(7); 35 let f = Hold::<u8>(7); 36 37 let g = identity(e); 38 39 let h = Hold(e); 40 let i = identity(h); 41 42 let z = (); // set breakpoint here 43 dowhatever() 44 } 45