summaryrefslogtreecommitdiffstats
path: root/src/tools/clippy/tests/ui/unnecessary_iter_cloned.rs
blob: d3d59c4c70f5cf32b6c088951d78155897a37052 (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
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
#![allow(unused_assignments)]
#![warn(clippy::unnecessary_to_owned)]

#[allow(dead_code)]
#[derive(Clone, Copy)]
enum FileType {
    Account,
    PrivateKey,
    Certificate,
}

fn main() {
    let path = std::path::Path::new("x");

    let _ = check_files(&[(FileType::Account, path)]);
    let _ = check_files_vec(vec![(FileType::Account, path)]);

    // negative tests
    let _ = check_files_ref(&[(FileType::Account, path)]);
    let _ = check_files_mut(&[(FileType::Account, path)]);
    let _ = check_files_ref_mut(&[(FileType::Account, path)]);
    let _ = check_files_self_and_arg(&[(FileType::Account, path)]);
    let _ = check_files_mut_path_buf(&[(FileType::Account, std::path::PathBuf::new())]);
}

// `check_files` and its variants are based on:
// https://github.com/breard-r/acmed/blob/1f0dcc32aadbc5e52de6d23b9703554c0f925113/acmed/src/storage.rs#L262
fn check_files(files: &[(FileType, &std::path::Path)]) -> bool {
    for (t, path) in files.iter().copied() {
        let other = match get_file_path(&t) {
            Ok(p) => p,
            Err(_) => {
                return false;
            },
        };
        if !path.is_file() || !other.is_file() {
            return false;
        }
    }
    true
}

fn check_files_vec(files: Vec<(FileType, &std::path::Path)>) -> bool {
    for (t, path) in files.iter().copied() {
        let other = match get_file_path(&t) {
            Ok(p) => p,
            Err(_) => {
                return false;
            },
        };
        if !path.is_file() || !other.is_file() {
            return false;
        }
    }
    true
}

fn check_files_ref(files: &[(FileType, &std::path::Path)]) -> bool {
    for (ref t, path) in files.iter().copied() {
        let other = match get_file_path(t) {
            Ok(p) => p,
            Err(_) => {
                return false;
            },
        };
        if !path.is_file() || !other.is_file() {
            return false;
        }
    }
    true
}

#[allow(unused_assignments)]
fn check_files_mut(files: &[(FileType, &std::path::Path)]) -> bool {
    for (mut t, path) in files.iter().copied() {
        t = FileType::PrivateKey;
        let other = match get_file_path(&t) {
            Ok(p) => p,
            Err(_) => {
                return false;
            },
        };
        if !path.is_file() || !other.is_file() {
            return false;
        }
    }
    true
}

fn check_files_ref_mut(files: &[(FileType, &std::path::Path)]) -> bool {
    for (ref mut t, path) in files.iter().copied() {
        *t = FileType::PrivateKey;
        let other = match get_file_path(t) {
            Ok(p) => p,
            Err(_) => {
                return false;
            },
        };
        if !path.is_file() || !other.is_file() {
            return false;
        }
    }
    true
}

fn check_files_self_and_arg(files: &[(FileType, &std::path::Path)]) -> bool {
    for (t, path) in files.iter().copied() {
        let other = match get_file_path(&t) {
            Ok(p) => p,
            Err(_) => {
                return false;
            },
        };
        if !path.join(path).is_file() || !other.is_file() {
            return false;
        }
    }
    true
}

#[allow(unused_assignments)]
fn check_files_mut_path_buf(files: &[(FileType, std::path::PathBuf)]) -> bool {
    for (mut t, path) in files.iter().cloned() {
        t = FileType::PrivateKey;
        let other = match get_file_path(&t) {
            Ok(p) => p,
            Err(_) => {
                return false;
            },
        };
        if !path.is_file() || !other.is_file() {
            return false;
        }
    }
    true
}

fn get_file_path(_file_type: &FileType) -> Result<std::path::PathBuf, std::io::Error> {
    Ok(std::path::PathBuf::new())
}