rust-clippy/tests/ui/implicit_hasher.rs

86 lines
2.2 KiB
Rust

#![allow(unused)]
use std::collections::{HashMap, HashSet};
use std::cmp::Eq;
use std::hash::{Hash, BuildHasher};
pub trait Foo<T>: Sized {
fn make() -> (Self, Self);
}
impl<K: Hash + Eq, V> Foo<i8> for HashMap<K, V> {
fn make() -> (Self, Self) {
// OK, don't suggest to modify these
let _: HashMap<i32, i32> = HashMap::new();
let _: HashSet<i32> = HashSet::new();
(HashMap::new(), HashMap::with_capacity(10))
}
}
impl<K: Hash + Eq, V> Foo<i8> for (HashMap<K, V>,) {
fn make() -> (Self, Self) {
((HashMap::new(),), (HashMap::with_capacity(10),))
}
}
impl Foo<i16> for HashMap<String, String> {
fn make() -> (Self, Self) {
(HashMap::new(), HashMap::with_capacity(10))
}
}
impl<K: Hash + Eq, V, S: BuildHasher + Default> Foo<i32> for HashMap<K, V, S> {
fn make() -> (Self, Self) {
(HashMap::default(), HashMap::with_capacity_and_hasher(10, Default::default()))
}
}
impl<S: BuildHasher + Default> Foo<i64> for HashMap<String, String, S> {
fn make() -> (Self, Self) {
(HashMap::default(), HashMap::with_capacity_and_hasher(10, Default::default()))
}
}
impl<T: Hash + Eq> Foo<i8> for HashSet<T> {
fn make() -> (Self, Self) {
(HashSet::new(), HashSet::with_capacity(10))
}
}
impl Foo<i16> for HashSet<String> {
fn make() -> (Self, Self) {
(HashSet::new(), HashSet::with_capacity(10))
}
}
impl<T: Hash + Eq, S: BuildHasher + Default> Foo<i32> for HashSet<T, S> {
fn make() -> (Self, Self) {
(HashSet::default(), HashSet::with_capacity_and_hasher(10, Default::default()))
}
}
impl<S: BuildHasher + Default> Foo<i64> for HashSet<String, S> {
fn make() -> (Self, Self) {
(HashSet::default(), HashSet::with_capacity_and_hasher(10, Default::default()))
}
}
pub fn foo(_map: &mut HashMap<i32, i32>, _set: &mut HashSet<i32>) {
}
macro_rules! gen {
(impl) => {
impl<K: Hash + Eq, V> Foo<u8> for HashMap<K, V> {
fn make() -> (Self, Self) {
(HashMap::new(), HashMap::with_capacity(10))
}
}
};
(fn $name:ident) => {
pub fn $name(_map: &mut HashMap<i32, i32>, _set: &mut HashSet<i32>) {
}
}
}
gen!(impl);
gen!(fn bar);
fn main() {}