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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.
54a0048b 12// ignore-tidy-linelength
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13
14trait CtxtFn {
15 fn f8(self, usize) -> usize;
16 fn f9(usize) -> usize; //~ NOTE candidate
17}
18
9346a6ac 19trait OtherTrait {
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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.
9346a6ac 28trait UnusedTrait {
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29 fn f9(usize) -> usize; //~ NOTE candidate
30}
31
32impl CtxtFn for usize {
33 fn f8(self, i: usize) -> usize {
c34b1796 34 i * 4
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35 }
36
37 fn f9(i: usize) -> usize {
c34b1796 38 i * 4
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39 }
40}
41
42impl OtherTrait for usize {
43 fn f9(i: usize) -> usize {
c34b1796 44 i * 8
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45 }
46}
47
48struct Myisize(isize);
49
50impl Myisize {
51 fn fff(i: isize) -> isize { //~ NOTE candidate
52 i
53 }
54}
55
9346a6ac 56trait ManyImplTrait {
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57 fn is_str() -> bool { //~ NOTE candidate
58 false
59 }
60}
61
62impl ManyImplTrait for String {
63 fn is_str() -> bool {
64 true
65 }
66}
67
68impl ManyImplTrait for usize {}
69impl ManyImplTrait for isize {}
70impl ManyImplTrait for char {}
71impl ManyImplTrait for Myisize {}
72
73fn no_param_bound(u: usize, m: Myisize) -> usize {
74 u.f8(42) + u.f9(342) + m.fff(42)
d9579d0f 75 //~^ ERROR no method named `f9` found for type `usize` in the current scope
54a0048b 76 //~^^ NOTE found the following associated functions; to be used as methods, functions must have a `self` parameter
d9579d0f 77 //~^^^ ERROR no method named `fff` found for type `Myisize` in the current scope
54a0048b 78 //~^^^^ NOTE found the following associated functions; to be used as methods, functions must have a `self` parameter
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79}
80
81fn param_bound<T: ManyImplTrait>(t: T) -> bool {
82 t.is_str()
d9579d0f 83 //~^ ERROR no method named `is_str` found for type `T` in the current scope
54a0048b 84 //~^^ NOTE found the following associated functions; to be used as methods, functions must have a `self` parameter
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85}
86
87fn main() {
88}