forked from mirrors/gecko-dev
e4d9bac157
New versions have shrink_to_fit(). This also explicitly requests the "std" feature, because otherwise autocfg fails to pass the panic=abort flag to rustc and it chokes. Depends on D96130 Differential Revision: https://phabricator.services.mozilla.com/D96131
53 lines
1 KiB
Rust
53 lines
1 KiB
Rust
use indexmap::indexmap;
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use indexmap::Equivalent;
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use std::hash::Hash;
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#[derive(Debug, Hash)]
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pub struct Pair<A, B>(pub A, pub B);
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impl<A, B, C, D> PartialEq<(A, B)> for Pair<C, D>
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where
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C: PartialEq<A>,
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D: PartialEq<B>,
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{
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fn eq(&self, rhs: &(A, B)) -> bool {
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self.0 == rhs.0 && self.1 == rhs.1
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}
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}
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impl<A, B, X> Equivalent<X> for Pair<A, B>
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where
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Pair<A, B>: PartialEq<X>,
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A: Hash + Eq,
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B: Hash + Eq,
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{
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fn equivalent(&self, other: &X) -> bool {
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*self == *other
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}
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}
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#[test]
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fn test_lookup() {
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let s = String::from;
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let map = indexmap! {
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(s("a"), s("b")) => 1,
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(s("a"), s("x")) => 2,
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};
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assert!(map.contains_key(&Pair("a", "b")));
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assert!(!map.contains_key(&Pair("b", "a")));
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}
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#[test]
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fn test_string_str() {
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let s = String::from;
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let mut map = indexmap! {
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s("a") => 1, s("b") => 2,
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s("x") => 3, s("y") => 4,
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};
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assert!(map.contains_key("a"));
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assert!(!map.contains_key("z"));
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assert_eq!(map.swap_remove("b"), Some(2));
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}
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