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
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
//! Dependency history.
use std::any::type_name;
use std::collections::HashSet;
use std::fmt::{Debug, Display};
const BOLD_MODE: &str = "\x1b[1m";
const RESET_BOLD_MODE: &str = "\x1b[22m";
/// Dependency history.
///
/// Used by the implementations of [`Injectable`] and [`AsyncInjectable`] generated by
/// the [`injectable`] macro to prevent circular dependencies when the `prevent-circular`
/// crate feature is enabled.
///
/// [`Injectable`]: crate::interfaces::injectable::Injectable
/// [`AsyncInjectable`]: crate::interfaces::async_injectable::AsyncInjectable
/// [`injectable`]: crate::injectable
#[derive(Clone, Debug, Default)]
pub struct DependencyHistory
{
inner: Vec<&'static str>,
}
impl DependencyHistory
{
/// Returns a new `DependencyHistory`.
#[must_use]
pub const fn new() -> Self
{
Self { inner: Vec::new() }
}
}
#[cfg_attr(test, mockall::automock)]
impl DependencyHistory
{
/// Adds a dependency to the history.
pub fn push<Dependency: 'static + ?Sized>(&mut self)
{
self.inner.push(type_name::<Dependency>());
}
/// Returns whether or not a dependency is present in the history.
#[allow(clippy::must_use_candidate)]
pub fn contains<Dependency: 'static + ?Sized>(&self) -> bool
{
self.inner.contains(&type_name::<Dependency>())
}
}
impl Display for DependencyHistory
{
fn fmt(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result
{
let mut found_items = HashSet::new();
let opt_dupe_item = self.inner.iter().find(|item| {
if found_items.contains(item) {
return true;
}
found_items.insert(*item);
false
});
for (index, item) in self.inner.iter().enumerate() {
let mut item_is_dupe = false;
if let Some(dupe_item) = opt_dupe_item {
if *item == *dupe_item {
formatter
.write_fmt(format_args!("{BOLD_MODE}{item}{RESET_BOLD_MODE}"))?;
item_is_dupe = true;
}
}
if !item_is_dupe {
formatter.write_str(item)?;
}
if index != self.inner.len() - 1 {
formatter.write_str(" -> ")?;
}
}
if opt_dupe_item.is_some() {
formatter.write_str(" -> ...")?;
}
Ok(())
}
}
#[cfg(test)]
mod tests
{
use super::*;
use crate::test_utils::subjects;
#[test]
fn can_push()
{
let mut dependency_history = DependencyHistory::new();
dependency_history.push::<dyn subjects::INumber>();
assert!(dependency_history
.inner
.contains(&type_name::<dyn subjects::INumber>()));
}
#[test]
fn contains_works()
{
let mut dependency_history = DependencyHistory::new();
dependency_history
.inner
.push(type_name::<dyn subjects::IUserManager>());
assert!(dependency_history.contains::<dyn subjects::IUserManager>());
assert!(!dependency_history.contains::<dyn subjects::INumber>());
}
#[test]
fn display_works()
{
trait Ninja {}
trait Katana {}
trait Blade {}
let mut dependency_history = DependencyHistory::new();
dependency_history.inner.push(type_name::<dyn Ninja>());
dependency_history.inner.push(type_name::<dyn Katana>());
dependency_history.inner.push(type_name::<dyn Blade>());
assert_eq!(
dependency_history.to_string(),
format!(
"{} -> {} -> {}",
type_name::<dyn Ninja>(),
type_name::<dyn Katana>(),
type_name::<dyn Blade>()
)
);
dependency_history.inner.push(type_name::<dyn Katana>());
assert_eq!(
dependency_history.to_string(),
format!(
concat!(
"{} -> {bold_mode}{}{reset_bold_mode} -> {} -> ",
"{bold_mode}{}{reset_bold_mode} -> ...",
),
type_name::<dyn Ninja>(),
type_name::<dyn Katana>(),
type_name::<dyn Blade>(),
type_name::<dyn Katana>(),
bold_mode = BOLD_MODE,
reset_bold_mode = RESET_BOLD_MODE
)
);
}
}
|
