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rust-clippy/tests/ui/clear_with_drain.rs
2023-08-11 14:02:28 +00:00

357 lines
9.3 KiB
Rust

#![allow(unused)]
#![warn(clippy::clear_with_drain)]
use std::collections::{BinaryHeap, HashMap, HashSet, VecDeque};
fn vec_range() {
// Do not lint because iterator is assigned
let mut v = vec![1, 2, 3];
let iter = v.drain(0..v.len());
// Do not lint because iterator is used
let mut v = vec![1, 2, 3];
let n = v.drain(0..v.len()).count();
// Do not lint because iterator is assigned and used
let mut v = vec![1, 2, 3];
let iter = v.drain(usize::MIN..v.len());
let n = iter.count();
// Do lint
let mut v = vec![1, 2, 3];
v.drain(0..v.len());
// Do lint
let mut v = vec![1, 2, 3];
v.drain(usize::MIN..v.len());
}
fn vec_range_from() {
// Do not lint because iterator is assigned
let mut v = vec![1, 2, 3];
let iter = v.drain(0..);
// Do not lint because iterator is assigned and used
let mut v = vec![1, 2, 3];
let mut iter = v.drain(0..);
let next = iter.next();
// Do not lint because iterator is used
let mut v = vec![1, 2, 3];
let next = v.drain(usize::MIN..).next();
// Do lint
let mut v = vec![1, 2, 3];
v.drain(0..);
// Do lint
let mut v = vec![1, 2, 3];
v.drain(usize::MIN..);
}
fn vec_range_full() {
// Do not lint because iterator is assigned
let mut v = vec![1, 2, 3];
let iter = v.drain(..);
// Do not lint because iterator is used
let mut v = vec![1, 2, 3];
for x in v.drain(..) {
let y = format!("x = {x}");
}
// Do lint
let mut v = vec![1, 2, 3];
v.drain(..);
}
fn vec_range_to() {
// Do not lint because iterator is assigned
let mut v = vec![1, 2, 3];
let iter = v.drain(..v.len());
// Do not lint because iterator is assigned and used
let mut v = vec![1, 2, 3];
let iter = v.drain(..v.len());
for x in iter {
let y = format!("x = {x}");
}
// Do lint
let mut v = vec![1, 2, 3];
v.drain(..v.len());
}
fn vec_partial_drains() {
// Do not lint any of these because the ranges are not full
let mut v = vec![1, 2, 3];
v.drain(1..);
let mut v = vec![1, 2, 3];
v.drain(1..).max();
let mut v = vec![1, 2, 3];
v.drain(..v.len() - 1);
let mut v = vec![1, 2, 3];
v.drain(..v.len() - 1).min();
let mut v = vec![1, 2, 3];
v.drain(1..v.len() - 1);
let mut v = vec![1, 2, 3];
let w: Vec<i8> = v.drain(1..v.len() - 1).collect();
}
fn vec_deque_range() {
// Do not lint because iterator is assigned
let mut deque = VecDeque::from([1, 2, 3]);
let iter = deque.drain(0..deque.len());
// Do not lint because iterator is used
let mut deque = VecDeque::from([1, 2, 3]);
let n = deque.drain(0..deque.len()).count();
// Do not lint because iterator is assigned and used
let mut deque = VecDeque::from([1, 2, 3]);
let iter = deque.drain(usize::MIN..deque.len());
let n = iter.count();
// Do lint
let mut deque = VecDeque::from([1, 2, 3]);
deque.drain(0..deque.len());
// Do lint
let mut deque = VecDeque::from([1, 2, 3]);
deque.drain(usize::MIN..deque.len());
}
fn vec_deque_range_from() {
// Do not lint because iterator is assigned
let mut deque = VecDeque::from([1, 2, 3]);
let iter = deque.drain(0..);
// Do not lint because iterator is assigned and used
let mut deque = VecDeque::from([1, 2, 3]);
let mut iter = deque.drain(0..);
let next = iter.next();
// Do not lint because iterator is used
let mut deque = VecDeque::from([1, 2, 3]);
let next = deque.drain(usize::MIN..).next();
// Do lint
let mut deque = VecDeque::from([1, 2, 3]);
deque.drain(0..);
// Do lint
let mut deque = VecDeque::from([1, 2, 3]);
deque.drain(usize::MIN..);
}
fn vec_deque_range_full() {
// Do not lint because iterator is assigned
let mut deque = VecDeque::from([1, 2, 3]);
let iter = deque.drain(..);
// Do not lint because iterator is used
let mut deque = VecDeque::from([1, 2, 3]);
for x in deque.drain(..) {
let y = format!("x = {x}");
}
// Do lint
let mut deque = VecDeque::from([1, 2, 3]);
deque.drain(..);
}
fn vec_deque_range_to() {
// Do not lint because iterator is assigned
let mut deque = VecDeque::from([1, 2, 3]);
let iter = deque.drain(..deque.len());
// Do not lint because iterator is assigned and used
let mut deque = VecDeque::from([1, 2, 3]);
let iter = deque.drain(..deque.len());
for x in iter {
let y = format!("x = {x}");
}
// Do lint
let mut deque = VecDeque::from([1, 2, 3]);
deque.drain(..deque.len());
}
fn vec_deque_partial_drains() {
// Do not lint any of these because the ranges are not full
let mut deque = VecDeque::from([1, 2, 3]);
deque.drain(1..);
let mut deque = VecDeque::from([1, 2, 3]);
deque.drain(1..).max();
let mut deque = VecDeque::from([1, 2, 3]);
deque.drain(..deque.len() - 1);
let mut deque = VecDeque::from([1, 2, 3]);
deque.drain(..deque.len() - 1).min();
let mut deque = VecDeque::from([1, 2, 3]);
deque.drain(1..deque.len() - 1);
let mut deque = VecDeque::from([1, 2, 3]);
let w: Vec<i8> = deque.drain(1..deque.len() - 1).collect();
}
fn string_range() {
// Do not lint because iterator is assigned
let mut s = String::from("Hello, world!");
let iter = s.drain(0..s.len());
// Do not lint because iterator is used
let mut s = String::from("Hello, world!");
let n = s.drain(0..s.len()).count();
// Do not lint because iterator is assigned and used
let mut s = String::from("Hello, world!");
let iter = s.drain(usize::MIN..s.len());
let n = iter.count();
// Do lint
let mut s = String::from("Hello, world!");
s.drain(0..s.len());
// Do lint
let mut s = String::from("Hello, world!");
s.drain(usize::MIN..s.len());
}
fn string_range_from() {
// Do not lint because iterator is assigned
let mut s = String::from("Hello, world!");
let iter = s.drain(0..);
// Do not lint because iterator is assigned and used
let mut s = String::from("Hello, world!");
let mut iter = s.drain(0..);
let next = iter.next();
// Do not lint because iterator is used
let mut s = String::from("Hello, world!");
let next = s.drain(usize::MIN..).next();
// Do lint
let mut s = String::from("Hello, world!");
s.drain(0..);
// Do lint
let mut s = String::from("Hello, world!");
s.drain(usize::MIN..);
}
fn string_range_full() {
// Do not lint because iterator is assigned
let mut s = String::from("Hello, world!");
let iter = s.drain(..);
// Do not lint because iterator is used
let mut s = String::from("Hello, world!");
for x in s.drain(..) {
let y = format!("x = {x}");
}
// Do lint
let mut s = String::from("Hello, world!");
s.drain(..);
}
fn string_range_to() {
// Do not lint because iterator is assigned
let mut s = String::from("Hello, world!");
let iter = s.drain(..s.len());
// Do not lint because iterator is assigned and used
let mut s = String::from("Hello, world!");
let iter = s.drain(..s.len());
for x in iter {
let y = format!("x = {x}");
}
// Do lint
let mut s = String::from("Hello, world!");
s.drain(..s.len());
}
fn string_partial_drains() {
// Do not lint any of these because the ranges are not full
let mut s = String::from("Hello, world!");
s.drain(1..);
let mut s = String::from("Hello, world!");
s.drain(1..).max();
let mut s = String::from("Hello, world!");
s.drain(..s.len() - 1);
let mut s = String::from("Hello, world!");
s.drain(..s.len() - 1).min();
let mut s = String::from("Hello, world!");
s.drain(1..s.len() - 1);
let mut s = String::from("Hello, world!");
let w: String = s.drain(1..s.len() - 1).collect();
}
fn hash_set() {
// Do not lint because iterator is assigned
let mut set = HashSet::from([1, 2, 3]);
let iter = set.drain();
// Do not lint because iterator is assigned and used
let mut set = HashSet::from([1, 2, 3]);
let mut iter = set.drain();
let next = iter.next();
// Do not lint because iterator is used
let mut set = HashSet::from([1, 2, 3]);
let next = set.drain().next();
// Do lint
let mut set = HashSet::from([1, 2, 3]);
set.drain();
}
fn hash_map() {
// Do not lint because iterator is assigned
let mut map = HashMap::from([(1, "a"), (2, "b")]);
let iter = map.drain();
// Do not lint because iterator is assigned and used
let mut map = HashMap::from([(1, "a"), (2, "b")]);
let mut iter = map.drain();
let next = iter.next();
// Do not lint because iterator is used
let mut map = HashMap::from([(1, "a"), (2, "b")]);
let next = map.drain().next();
// Do lint
let mut map = HashMap::from([(1, "a"), (2, "b")]);
map.drain();
}
fn binary_heap() {
// Do not lint because iterator is assigned
let mut heap = BinaryHeap::from([1, 2]);
let iter = heap.drain();
// Do not lint because iterator is assigned and used
let mut heap = BinaryHeap::from([1, 2]);
let mut iter = heap.drain();
let next = iter.next();
// Do not lint because iterator is used
let mut heap = BinaryHeap::from([1, 2]);
let next = heap.drain().next();
// Do lint
let mut heap = BinaryHeap::from([1, 2]);
heap.drain();
}
fn main() {}