88 lines
2.0 KiB
Rust
88 lines
2.0 KiB
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// Test the mechanism for warning about possible missing `self` declarations.
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// ignore-tidy-linelength
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trait CtxtFn {
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fn f8(self, _: usize) -> usize;
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fn f9(_: usize) -> usize;
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}
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trait OtherTrait {
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fn f9(_: usize) -> usize;
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}
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// Note: this trait is not implemented, but we can't really tell
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// whether or not an impl would match anyhow without a self
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// declaration to match against, so we wind up prisizeing it as a
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// candidate. This seems not unreasonable -- perhaps the user meant to
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// implement it, after all.
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trait UnusedTrait {
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fn f9(_: usize) -> usize;
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}
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impl CtxtFn for usize {
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fn f8(self, i: usize) -> usize {
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i * 4
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}
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fn f9(i: usize) -> usize {
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i * 4
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}
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}
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impl OtherTrait for usize {
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fn f9(i: usize) -> usize {
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i * 8
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}
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}
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struct Myisize(isize);
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impl Myisize {
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fn fff(i: isize) -> isize {
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i
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}
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}
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trait ManyImplTrait {
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fn is_str() -> bool {
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false
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}
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}
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impl ManyImplTrait for String {
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fn is_str() -> bool {
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true
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}
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}
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impl ManyImplTrait for usize {}
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impl ManyImplTrait for isize {}
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impl ManyImplTrait for char {}
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impl ManyImplTrait for Myisize {}
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fn no_param_bound(u: usize, m: Myisize) -> usize {
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u.f8(42) + u.f9(342) + m.fff(42)
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//~^ ERROR no method named `f9` found for type `usize` in the current scope
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//~| ERROR no method named `fff` found for type `Myisize` in the current scope
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}
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fn param_bound<T: ManyImplTrait>(t: T) -> bool {
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t.is_str()
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//~^ ERROR no method named `is_str` found for type `T` in the current scope
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}
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fn main() {
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}
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