blob: 59c0baf8718aae16755f769719e0c6823ca4afb9 (
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
|
// run-rustfix
#![warn(clippy::box_default)]
#[derive(Default)]
struct ImplementsDefault;
struct OwnDefault;
impl OwnDefault {
fn default() -> Self {
Self
}
}
macro_rules! outer {
($e: expr) => {
$e
};
}
fn main() {
let _string: Box<String> = Box::default();
let _byte = Box::<u8>::default();
let _vec = Box::<Vec<u8>>::default();
let _impl = Box::<ImplementsDefault>::default();
let _impl2 = Box::<ImplementsDefault>::default();
let _impl3: Box<ImplementsDefault> = Box::default();
let _own = Box::new(OwnDefault::default()); // should not lint
let _in_macro = outer!(Box::<String>::default());
let _string_default = outer!(Box::<String>::default());
let _vec2: Box<Vec<ImplementsDefault>> = Box::default();
let _vec3: Box<Vec<bool>> = Box::default();
let _vec4: Box<_> = Box::<Vec<bool>>::default();
let _more = ret_ty_fn();
call_ty_fn(Box::default());
issue_10381();
}
fn ret_ty_fn() -> Box<bool> {
Box::<bool>::default()
}
#[allow(clippy::boxed_local)]
fn call_ty_fn(_b: Box<u8>) {
issue_9621_dyn_trait();
}
use std::io::{Read, Result};
impl Read for ImplementsDefault {
fn read(&mut self, _: &mut [u8]) -> Result<usize> {
Ok(0)
}
}
fn issue_9621_dyn_trait() {
let _: Box<dyn Read> = Box::<ImplementsDefault>::default();
issue_10089();
}
fn issue_10089() {
let _closure = || {
#[derive(Default)]
struct WeirdPathed;
let _ = Box::<WeirdPathed>::default();
};
}
fn issue_10381() {
#[derive(Default)]
pub struct Foo {}
pub trait Bar {}
impl Bar for Foo {}
fn maybe_get_bar(i: u32) -> Option<Box<dyn Bar>> {
if i % 2 == 0 {
Some(Box::<Foo>::default())
} else {
None
}
}
assert!(maybe_get_bar(2).is_some());
}
|
