87 lines
1.6 KiB
Rust
87 lines
1.6 KiB
Rust
#![feature(tool_lints)]
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#![allow(unused, clippy::many_single_char_names)]
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#![warn(clippy::ptr_arg)]
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use std::borrow::Cow;
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fn do_vec(x: &Vec<i64>) {
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//Nothing here
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}
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fn do_vec_mut(x: &mut Vec<i64>) { // no error here
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//Nothing here
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}
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fn do_str(x: &String) {
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//Nothing here either
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}
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fn do_str_mut(x: &mut String) { // no error here
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//Nothing here either
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}
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fn main() {
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}
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trait Foo {
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type Item;
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fn do_vec(x: &Vec<i64>);
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fn do_item(x: &Self::Item);
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}
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struct Bar;
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// no error, in trait impl (#425)
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impl Foo for Bar {
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type Item = Vec<u8>;
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fn do_vec(x: &Vec<i64>) {}
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fn do_item(x: &Vec<u8>) {}
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}
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fn cloned(x: &Vec<u8>) -> Vec<u8> {
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let e = x.clone();
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let f = e.clone(); // OK
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let g = x;
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let h = g.clone(); // Alas, we cannot reliably detect this without following data.
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let i = (e).clone();
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x.clone()
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}
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fn str_cloned(x: &String) -> String {
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let a = x.clone();
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let b = x.clone();
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let c = b.clone();
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let d = a.clone()
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.clone()
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.clone();
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x.clone()
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}
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fn false_positive_capacity(x: &Vec<u8>, y: &String) {
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let a = x.capacity();
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let b = y.clone();
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let c = y.as_str();
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}
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fn false_positive_capacity_too(x: &String) -> String {
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if x.capacity() > 1024 { panic!("Too large!"); }
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x.clone()
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}
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#[allow(dead_code)]
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fn test_cow_with_ref(c: &Cow<[i32]>) {
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}
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#[allow(dead_code)]
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fn test_cow(c: Cow<[i32]>) {
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let _c = c;
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}
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trait Foo2 {
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fn do_string(&self);
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}
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// no error for &self references where self is of type String (#2293)
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impl Foo2 for String { fn do_string(&self) {} }
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