rust/tests/ui/set_contains_or_insert.rs

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#![allow(unused)]
#![allow(clippy::nonminimal_bool)]
#![allow(clippy::needless_borrow)]
#![warn(clippy::set_contains_or_insert)]
use std::collections::HashSet;
fn main() {
should_warn_cases();
should_not_warn_cases();
}
fn should_warn_cases() {
let mut set = HashSet::new();
let value = 5;
if !set.contains(&value) {
set.insert(value);
println!("Just a comment");
}
if set.contains(&value) {
set.insert(value);
println!("Just a comment");
}
if !set.contains(&value) {
set.insert(value);
}
if !!set.contains(&value) {
set.insert(value);
println!("Just a comment");
}
if (&set).contains(&value) {
set.insert(value);
}
let borrow_value = &6;
if !set.contains(borrow_value) {
set.insert(*borrow_value);
}
let borrow_set = &mut set;
if !borrow_set.contains(&value) {
borrow_set.insert(value);
}
}
fn should_not_warn_cases() {
let mut set = HashSet::new();
let value = 5;
let another_value = 6;
if !set.contains(&value) {
set.insert(another_value);
}
if !set.contains(&value) {
println!("Just a comment");
}
if simply_true() {
set.insert(value);
}
if !set.contains(&value) {
set.replace(value); //it is not insert
println!("Just a comment");
}
if set.contains(&value) {
println!("value is already in set");
} else {
set.insert(value);
}
}
fn simply_true() -> bool {
true
}