jlrs 0.23.0

jlrs provides bindings to the Julia C API that enable Julia code to be called from Rust and more.
Documentation 
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
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115

mod util;
#[cfg(feature = "local-rt")]
mod tests {
    use std::panic::{AssertUnwindSafe, catch_unwind};

    use jlrs::{catch::catch_exceptions, prelude::*, weak_handle_unchecked};

    use super::util::JULIA;

    fn call0_exception_is_caught() {
        JULIA.with(|handle| {
            handle.borrow_mut().with_stack(|mut stack| {
                stack.scope(|mut frame| unsafe {
                    let func = Module::main(&frame)
                        .submodule(&frame, "JlrsTests")
                        .unwrap()
                        .as_managed()
                        .global(&frame, "throws_exception")
                        .unwrap()
                        .as_managed();

                    let mut f = || func.call_unchecked(&mut frame, []);

                    let mut exc = false;
                    let res = catch_exceptions(&mut f, |_e| {
                        exc = true;
                    });
                    assert!(exc);
                    assert!(res.is_err());
                });
            });
        });
    }

    unsafe fn throwing_inner(func: Value) {
        unsafe {
            let f2 = || {
                let handle = weak_handle_unchecked!();
                func.call_unchecked(&handle, []);
                assert!(false);
            };

            let _ = catch_exceptions(f2, |e| {
                e.rethrow();
            });

            assert!(false);
        }
    }

    unsafe fn catching_outer(func: Value) {
        unsafe {
            let f2 = || {
                throwing_inner(func);
                assert!(false);
            };

            let mut exc = false;
            let _ = catch_exceptions(f2, |_e| {
                exc = true;
            });

            assert!(exc);
        }
    }

    fn rethrow_exception() {
        JULIA.with(|handle| {
            handle.borrow_mut().with_stack(|mut stack| {
                stack.scope(|frame| unsafe {
                    let func = Module::main(&frame)
                        .submodule(&frame, "JlrsTests")
                        .unwrap()
                        .as_managed()
                        .global(&frame, "throws_exception")
                        .unwrap()
                        .as_managed();

                    catching_outer(func);
                });
            });
        });
    }

    fn catch_panic() {
        JULIA.with(|handle| {
            handle.borrow_mut().local_scope::<_, 1>(|frame| unsafe {
                let s1 = *jlrs::util::pgcstack();

                let res = catch_unwind(AssertUnwindSafe(|| {
                    let _ = catch_exceptions(
                        || {
                            frame.local_scope::<_, 1>(|_| {
                                panic!("Expected panic");
                            })
                        },
                        |_| (),
                    );
                }));

                assert!(res.is_err(), "Didn't panic");
                let s2 = *jlrs::util::pgcstack();
                // let s2_prev = (&**s2).prev.get();
                assert_eq!(s1, s2, "GC corruption");
            })
        });
    }

    #[test]
    fn call_exception_tests() {
        call0_exception_is_caught();
        rethrow_exception();
        catch_panic();
    }
}