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