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