rust/tests/ui/zero_sized_btreemap_values.rs

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#![warn(clippy::zero_sized_map_values)]
use std::collections::BTreeMap;
const CONST_OK: Option<BTreeMap<String, usize>> = None;
const CONST_NOT_OK: Option<BTreeMap<String, ()>> = None;
static STATIC_OK: Option<BTreeMap<String, usize>> = None;
static STATIC_NOT_OK: Option<BTreeMap<String, ()>> = None;
type OkMap = BTreeMap<String, usize>;
type NotOkMap = BTreeMap<String, ()>;
enum TestEnum {
Ok(BTreeMap<String, usize>),
NotOk(BTreeMap<String, ()>),
}
struct Test {
ok: BTreeMap<String, usize>,
not_ok: BTreeMap<String, ()>,
also_not_ok: Vec<BTreeMap<usize, ()>>,
}
trait TestTrait {
type Output;
fn produce_output() -> Self::Output;
fn weird_map(&self, map: BTreeMap<usize, ()>);
}
impl Test {
fn ok(&self) -> BTreeMap<String, usize> {
todo!()
}
fn not_ok(&self) -> BTreeMap<String, ()> {
todo!()
}
}
impl TestTrait for Test {
type Output = BTreeMap<String, ()>;
fn produce_output() -> Self::Output {
todo!();
}
fn weird_map(&self, map: BTreeMap<usize, ()>) {
todo!();
}
}
fn test(map: BTreeMap<String, ()>, key: &str) -> BTreeMap<String, ()> {
todo!();
}
fn test2(map: BTreeMap<String, usize>, key: &str) -> BTreeMap<String, usize> {
todo!();
}
fn main() {
let _: BTreeMap<String, ()> = BTreeMap::new();
let _: BTreeMap<String, usize> = BTreeMap::new();
let _: BTreeMap<_, _> = std::iter::empty::<(String, ())>().collect();
}