fn_graph 0.18.0

Runs interdependent logic concurrently, starting each function when predecessors have completed.
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
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142

#[cfg(not(feature = "fn_meta"))]
use core::any::TypeId;

#[cfg(not(feature = "fn_meta"))]
use crate::{DataAccess, DataAccessDyn, TypeIds};

/// Read access to `T`.
#[cfg(not(feature = "resman"))]
#[derive(Debug)]
pub struct R<'read, T>(&'read T);

#[cfg(not(feature = "resman"))]
impl<'read, T> R<'read, T> {
    /// Returns a new `R` wrapper.
    pub fn new(t: &'read T) -> Self {
        Self(t)
    }
}

/// Read access to `T`.
#[cfg(feature = "resman")]
pub type R<'read, T> = resman::Ref<'read, T>;

#[cfg(not(feature = "resman"))]
impl<T> std::ops::Deref for R<'_, T> {
    type Target = T;

    fn deref(&self) -> &T {
        self.0
    }
}

#[cfg(not(feature = "fn_meta"))]
impl<T> DataAccess for R<'_, T>
where
    T: 'static,
{
    fn borrows() -> TypeIds {
        let mut type_ids = TypeIds::new();
        type_ids.push(TypeId::of::<T>());
        type_ids
    }

    fn borrow_muts() -> TypeIds {
        TypeIds::new()
    }
}

#[cfg(not(feature = "fn_meta"))]
impl<T> DataAccessDyn for R<'_, T>
where
    T: 'static,
{
    fn borrows(&self) -> TypeIds {
        let mut type_ids = TypeIds::new();
        type_ids.push(TypeId::of::<T>());
        type_ids
    }

    fn borrow_muts(&self) -> TypeIds {
        TypeIds::new()
    }
}

/// Borrows data from `Resources`.
#[cfg(feature = "resman")]
impl<'borrow, T> crate::DataBorrow<'borrow> for R<'borrow, T>
where
    T: std::fmt::Debug + Send + Sync + 'static,
{
    fn borrow(resources: &'borrow resman::Resources) -> Self {
        resources.borrow::<T>()
    }
}

#[cfg(all(not(feature = "resman"), not(feature = "fn_meta")))]
#[cfg(test)]
mod tests {
    use std::any::TypeId;

    use super::R;
    use crate::{DataAccess, DataAccessDyn};

    #[test]
    fn unit() {
        assert_eq!(
            [TypeId::of::<u32>()] as [TypeId; 1],
            <R<'_, u32> as DataAccess>::borrows().as_slice()
        );
        assert_eq!(
            [] as [TypeId; 0],
            <R<'_, u32> as DataAccess>::borrow_muts().as_slice()
        );
        assert_eq!(
            [TypeId::of::<u32>()] as [TypeId; 1],
            R(&1u32).borrows().as_slice()
        );
        assert_eq!([] as [TypeId; 0], R(&1u32).borrow_muts().as_slice());
    }

    #[test]
    fn debug() {
        let r = R::<'_, u32>(&1);

        assert_eq!("R(1)", format!("{r:?}"));
    }

    #[test]
    fn deref() {
        let n = 1u32;
        let r = R::<'_, u32>::new(&n);

        assert_eq!(1, *r);
    }
}

#[cfg(feature = "resman")]
#[cfg(test)]
mod tests {
    use resman::Resources;

    use super::R;
    use crate::DataBorrow;

    #[test]
    fn unit() {
        let mut resources = Resources::new();
        resources.insert(1u32);

        assert_eq!(1, *R::<'_, u32>::borrow(&resources));
    }

    #[test]
    fn debug() {
        let mut resources = Resources::new();
        resources.insert(1u32);

        let r = R::<'_, u32>::borrow(&resources);

        assert_eq!("Ref { inner: 1 }", format!("{r:?}"));
    }
}