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1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
4 //
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
10
11 // Test the mechanism for warning about possible missing `self` declarations.
12 // ignore-tidy-linelength
13
14 trait CtxtFn {
15 fn f8(self, usize) -> usize;
16 fn f9(usize) -> usize; //~ NOTE candidate
17 }
18
19 trait OtherTrait {
20 fn f9(usize) -> usize; //~ NOTE candidate
21 }
22
23 // Note: this trait is not implemented, but we can't really tell
24 // whether or not an impl would match anyhow without a self
25 // declaration to match against, so we wind up prisizeing it as a
26 // candidate. This seems not unreasonable -- perhaps the user meant to
27 // implement it, after all.
28 trait UnusedTrait {
29 fn f9(usize) -> usize; //~ NOTE candidate
30 }
31
32 impl CtxtFn for usize {
33 fn f8(self, i: usize) -> usize {
34 i * 4
35 }
36
37 fn f9(i: usize) -> usize {
38 i * 4
39 }
40 }
41
42 impl OtherTrait for usize {
43 fn f9(i: usize) -> usize {
44 i * 8
45 }
46 }
47
48 struct Myisize(isize);
49
50 impl Myisize {
51 fn fff(i: isize) -> isize { //~ NOTE candidate
52 i
53 }
54 }
55
56 trait ManyImplTrait {
57 fn is_str() -> bool { //~ NOTE candidate
58 false
59 }
60 }
61
62 impl ManyImplTrait for String {
63 fn is_str() -> bool {
64 true
65 }
66 }
67
68 impl ManyImplTrait for usize {}
69 impl ManyImplTrait for isize {}
70 impl ManyImplTrait for char {}
71 impl ManyImplTrait for Myisize {}
72
73 fn no_param_bound(u: usize, m: Myisize) -> usize {
74 u.f8(42) + u.f9(342) + m.fff(42)
75 //~^ ERROR no method named `f9` found for type `usize` in the current scope
76 //~^^ NOTE found the following associated functions; to be used as methods, functions must have a `self` parameter
77 //~^^^ ERROR no method named `fff` found for type `Myisize` in the current scope
78 //~^^^^ NOTE found the following associated functions; to be used as methods, functions must have a `self` parameter
79 }
80
81 fn param_bound<T: ManyImplTrait>(t: T) -> bool {
82 t.is_str()
83 //~^ ERROR no method named `is_str` found for type `T` in the current scope
84 //~^^ NOTE found the following associated functions; to be used as methods, functions must have a `self` parameter
85 }
86
87 fn main() {
88 }