blob: fe60d929759ba8eff87cc691df8f89d345ea78d1 (
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
|
#![warn(clippy::unnecessary_box_returns)]
trait Bar {
// lint
fn baz(&self) -> Box<usize>;
}
pub struct Foo {}
impl Bar for Foo {
// don't lint: this is a problem with the trait, not the implementation
fn baz(&self) -> Box<usize> {
Box::new(42)
}
}
impl Foo {
fn baz(&self) -> Box<usize> {
// lint
Box::new(13)
}
}
// lint
fn bxed_usize() -> Box<usize> {
Box::new(5)
}
// lint
fn _bxed_foo() -> Box<Foo> {
Box::new(Foo {})
}
// don't lint: this is exported
pub fn bxed_foo() -> Box<Foo> {
Box::new(Foo {})
}
// don't lint: str is unsized
fn bxed_str() -> Box<str> {
"Hello, world!".to_string().into_boxed_str()
}
// don't lint: function contains the word, "box"
fn boxed_usize() -> Box<usize> {
Box::new(7)
}
// don't lint: this has an unspecified return type
fn default() {}
// don't lint: this doesn't return a Box
fn string() -> String {
String::from("Hello, world")
}
fn main() {
// don't lint: this is a closure
let a = || -> Box<usize> { Box::new(5) };
}
|
