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)]
22struct Hold<T>(T);
23
24pub fn identity<T>(x: T) -> T { x }
25
26fn dowhatever() { () }
27
28pub 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