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
|
// Test for issue 81576
// Remove generic arguments if no method is found for all possible generic argument
use std::marker::PhantomData;
struct Wrapper2<'a, T, const C: usize> {
x: &'a T,
}
impl<'a, const C: usize> Wrapper2<'a, i8, C> {
fn method(&self) {}
}
impl<'a, const C: usize> Wrapper2<'a, i16, C> {
fn method(&self) {}
}
impl<'a, const C: usize> Wrapper2<'a, i32, C> {
fn method(&self) {}
}
struct Wrapper<T>(T);
impl Wrapper<i8> {
fn method(&self) {}
}
impl Wrapper<i16> {
fn method(&self) {}
}
impl Wrapper<i32> {
fn method(&self) {}
}
impl Wrapper<i64> {
fn method(&self) {}
}
impl Wrapper<u8> {
fn method(&self) {}
}
impl Wrapper<u16> {
fn method(&self) {}
}
struct Point<T> {
x: T,
y: T,
}
impl Point<f64> {
fn distance(&self) -> f64 {
self.x.hypot(self.y)
}
}
struct Other;
impl Other {
fn other(&self) {}
}
struct Struct<T> {
_phatom: PhantomData<T>,
}
impl<T> Default for Struct<T> {
fn default() -> Self {
Self { _phatom: PhantomData }
}
}
impl<T: Clone + Copy + PartialEq + Eq + PartialOrd + Ord> Struct<T> {
fn method(&self) {}
}
fn main() {
let point_f64 = Point { x: 1_f64, y: 1_f64 };
let d = point_f64.distance();
let point_i32 = Point { x: 1_i32, y: 1_i32 };
let d = point_i32.distance();
//~^ ERROR no method named `distance` found for struct `Point<i32>
let d = point_i32.other();
//~^ ERROR no method named `other` found for struct `Point
let v = vec![1, 2, 3];
v.iter().map(Box::new(|x| x * x) as Box<dyn Fn(&i32) -> i32>).extend(std::iter::once(100));
//~^ ERROR no method named `extend` found for struct `Map
let wrapper = Wrapper(true);
wrapper.method();
//~^ ERROR no method named `method` found for struct `Wrapper<bool>
wrapper.other();
//~^ ERROR no method named `other` found for struct `Wrapper
let boolean = true;
let wrapper = Wrapper2::<'_, _, 3> { x: &boolean };
wrapper.method();
//~^ ERROR no method named `method` found for struct `Wrapper2<'_, bool, 3>
wrapper.other();
//~^ ERROR no method named `other` found for struct `Wrapper2
let a = vec![1, 2, 3];
a.not_found();
//~^ ERROR no method named `not_found` found for struct `Vec
let s = Struct::<f64>::default();
s.method();
//~^ ERROR the method `method` exists for struct `Struct<f64>`, but its trait bounds were not satisfied
}
|
