blob: 7493dba4928b0bff6918dddd6856abee1ecd2878 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
// Check various forms of dynamic closure calls
//@ revisions: cfi kcfi
// FIXME(#122848) Remove only-linux once OSX CFI binaries work
//@ only-linux
//@ ignore-backends: gcc
//@ [cfi] needs-sanitizer-cfi
//@ [kcfi] needs-sanitizer-kcfi
//@ compile-flags: -C target-feature=-crt-static -C unsafe-allow-abi-mismatch=sanitizer
//@ [cfi] compile-flags: -C codegen-units=1 -C lto -C prefer-dynamic=off -C opt-level=0
//@ [cfi] compile-flags: -Z sanitizer=cfi
//@ [kcfi] compile-flags: -Z sanitizer=kcfi
//@ [kcfi] compile-flags: -C panic=abort -Z panic-abort-tests -C prefer-dynamic=off
//@ compile-flags: --test
//@ run-pass
#![feature(fn_traits)]
#![feature(unboxed_closures)]
fn foo<'a, T>() -> Box<dyn Fn(&'a T) -> &'a T> {
Box::new(|x| x)
}
#[test]
fn dyn_fn_with_params() {
let x = 3;
let f = foo();
f(&x);
// FIXME remove once drops are working.
std::mem::forget(f);
}
#[test]
fn call_fn_trait() {
let f: &dyn Fn() = &(|| {}) as _;
f.call(());
}
#[test]
fn fn_ptr_cast() {
let f: &fn() = &((|| ()) as _);
f();
}
fn use_fnmut<F: FnMut()>(mut f: F) {
f()
}
#[test]
fn fn_to_fnmut() {
let f: &dyn Fn() = &(|| {}) as _;
use_fnmut(f);
}
fn hrtb_helper(f: &dyn for<'a> Fn(&'a usize)) {
f(&10)
}
#[test]
fn hrtb_fn() {
hrtb_helper((&|x: &usize| println!("{}", *x)) as _)
}
#[test]
fn fnonce() {
let f: Box<dyn FnOnce()> = Box::new(|| {}) as _;
f();
}
fn use_closure<C>(call: extern "rust-call" fn(&C, ()) -> i32, f: &C) -> i32 {
call(f, ())
}
#[test]
fn closure_addr_taken() {
let x = 3i32;
let f = || x;
let call = Fn::<()>::call;
use_closure(call, &f);
}
fn use_closure_once<C>(call: extern "rust-call" fn(C, ()) -> i32, f: C) -> i32 {
call(f, ())
}
#[test]
fn closure_once_addr_taken() {
let g = || 3;
let call2 = FnOnce::<()>::call_once;
use_closure_once(call2, g);
}
|
