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Commit | Line | Data |
---|---|---|
b7449926 | 1 | // run-pass |
a2a8927a | 2 | // needs-unwind |
abe05a73 | 3 | |
cc61c64b XL |
4 | #![feature(fn_traits)] |
5 | #![feature(never_type)] | |
6 | ||
7 | use std::panic; | |
8 | ||
9 | fn foo(x: u32, y: u32) -> u32 { x/y } | |
10 | fn foo_diverges() -> ! { panic!() } | |
11 | ||
12 | fn test_fn_ptr<T>(mut t: T) | |
13 | where T: Fn(u32, u32) -> u32, | |
14 | { | |
15 | let as_fn = <T as Fn<(u32, u32)>>::call; | |
16 | assert_eq!(as_fn(&t, (9, 3)), 3); | |
17 | let as_fn_mut = <T as FnMut<(u32, u32)>>::call_mut; | |
18 | assert_eq!(as_fn_mut(&mut t, (18, 3)), 6); | |
19 | let as_fn_once = <T as FnOnce<(u32, u32)>>::call_once; | |
20 | assert_eq!(as_fn_once(t, (24, 3)), 8); | |
21 | } | |
22 | ||
23 | fn assert_panics<F>(f: F) where F: FnOnce() { | |
24 | let f = panic::AssertUnwindSafe(f); | |
25 | let result = panic::catch_unwind(move || { | |
26 | f.0() | |
27 | }); | |
28 | if let Ok(..) = result { | |
29 | panic!("diverging function returned"); | |
30 | } | |
31 | } | |
32 | ||
33 | fn test_fn_ptr_panic<T>(mut t: T) | |
34 | where T: Fn() -> ! | |
35 | { | |
36 | let as_fn = <T as Fn<()>>::call; | |
37 | assert_panics(|| as_fn(&t, ())); | |
38 | let as_fn_mut = <T as FnMut<()>>::call_mut; | |
39 | assert_panics(|| as_fn_mut(&mut t, ())); | |
40 | let as_fn_once = <T as FnOnce<()>>::call_once; | |
41 | assert_panics(|| as_fn_once(t, ())); | |
42 | } | |
43 | ||
44 | fn main() { | |
45 | test_fn_ptr(foo); | |
46 | test_fn_ptr(foo as fn(u32, u32) -> u32); | |
47 | test_fn_ptr_panic(foo_diverges); | |
48 | test_fn_ptr_panic(foo_diverges as fn() -> !); | |
49 | } |