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
|
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// Test the mechanism for warning about possible missing `self` declarations.
trait CtxtFn {
fn f8(self, usize) -> usize;
fn f9(usize) -> usize; //~ NOTE candidate
}
trait OtherTrait {
fn f9(usize) -> usize; //~ NOTE candidate
}
// Note: this trait is not implemented, but we can't really tell
// whether or not an impl would match anyhow without a self
// declaration to match against, so we wind up prisizeing it as a
// candidate. This seems not unreasonable -- perhaps the user meant to
// implement it, after all.
trait UnusedTrait {
fn f9(usize) -> usize; //~ NOTE candidate
}
impl CtxtFn for usize {
fn f8(self, i: usize) -> usize {
i * 4_usize
}
fn f9(i: usize) -> usize {
i * 4_usize
}
}
impl OtherTrait for usize {
fn f9(i: usize) -> usize {
i * 8_usize
}
}
struct Myisize(isize);
impl Myisize {
fn fff(i: isize) -> isize { //~ NOTE candidate
i
}
}
trait ManyImplTrait {
fn is_str() -> bool { //~ NOTE candidate
false
}
}
impl ManyImplTrait for String {
fn is_str() -> bool {
true
}
}
impl ManyImplTrait for usize {}
impl ManyImplTrait for isize {}
impl ManyImplTrait for char {}
impl ManyImplTrait for Myisize {}
fn no_param_bound(u: usize, m: Myisize) -> usize {
u.f8(42) + u.f9(342) + m.fff(42)
//~^ ERROR type `usize` does not implement any method in scope named `f9`
//~^^ NOTE found defined static methods, maybe a `self` is missing?
//~^^^ ERROR type `Myisize` does not implement any method in scope named `fff`
//~^^^^ NOTE found defined static methods, maybe a `self` is missing?
}
fn param_bound<T: ManyImplTrait>(t: T) -> bool {
t.is_str()
//~^ ERROR type `T` does not implement any method in scope named `is_str`
//~^^ NOTE found defined static methods, maybe a `self` is missing?
}
fn main() {
}
|
