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impl PartialEq<Vec<B>> for &[A], &mut [A]

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Solomon Ucko 2020-04-28 22:40:18 -04:00 committed by David Tolnay
parent 63b441aafb
commit fc60282dae
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2 changed files with 59 additions and 0 deletions
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54
src/liballoc/tests/vec.rs
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@ -1,5 +1,6 @@
use std::borrow::Cow;
use std::collections::TryReserveError::*;
use std::fmt::Debug;
use std::mem::size_of;
use std::panic::{catch_unwind, AssertUnwindSafe};
use std::vec::{Drain, IntoIter};
@ -1588,3 +1589,56 @@ fn test_push_growth_strategy() {
}
}
}
macro_rules! generate_assert_eq_vec_and_prim {
($name:ident<$B:ident>($type:ty)) => {
fn $name<A: PartialEq<$B> + Debug, $B: Debug>(a: Vec<A>, b: $type) {
assert!(a == b);
assert_eq!(a, b);
}
};
}
generate_assert_eq_vec_and_prim! { assert_eq_vec_and_slice <B>(&[B]) }
generate_assert_eq_vec_and_prim! { assert_eq_vec_and_array_3<B>([B; 3]) }
#[test]
fn partialeq_vec_and_prim() {
assert_eq_vec_and_slice(vec![1, 2, 3], &[1, 2, 3]);
assert_eq_vec_and_array_3(vec![1, 2, 3], [1, 2, 3]);
}
macro_rules! assert_partial_eq_valid {
($a2:ident, $a3:ident; $b2:ident, $b3: ident) => {
assert!($a2 == $b2);
assert!($a2 != $b3);
assert!($a3 != $b2);
assert!($a3 == $b3);
assert_eq!($a2, $b2);
assert_ne!($a2, $b3);
assert_ne!($a3, $b2);
assert_eq!($a3, $b3);
};
}
#[test]
fn partialeq_vec_full() {
let vec2: Vec<_> = vec![1, 2];
let vec3: Vec<_> = vec![1, 2, 3];
let slice2: &[_] = &[1, 2];
let slice3: &[_] = &[1, 2, 3];
let slicemut2: &[_] = &mut [1, 2];
let slicemut3: &[_] = &mut [1, 2, 3];
let array2: [_; 2] = [1, 2];
let array3: [_; 3] = [1, 2, 3];
let arrayref2: &[_; 2] = &[1, 2];
let arrayref3: &[_; 3] = &[1, 2, 3];
assert_partial_eq_valid!(vec2,vec3; vec2,vec3);
assert_partial_eq_valid!(vec2,vec3; slice2,slice3);
assert_partial_eq_valid!(vec2,vec3; slicemut2,slicemut3);
assert_partial_eq_valid!(slice2,slice3; vec2,vec3);
assert_partial_eq_valid!(slicemut2,slicemut3; vec2,vec3);
assert_partial_eq_valid!(vec2,vec3; array2,array3);
assert_partial_eq_valid!(vec2,vec3; arrayref2,arrayref3);
}

5
src/liballoc/vec.rs
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@ -2362,6 +2362,8 @@ macro_rules! __impl_slice_eq1 {
__impl_slice_eq1! { [] Vec<A>, Vec<B>, }
__impl_slice_eq1! { [] Vec<A>, &[B], }
__impl_slice_eq1! { [] Vec<A>, &mut [B], }
__impl_slice_eq1! { [] &[A], Vec<B>, }
__impl_slice_eq1! { [] &mut [A], Vec<B>, }
__impl_slice_eq1! { [] Cow<'_, [A]>, Vec<B>, A: Clone }
__impl_slice_eq1! { [] Cow<'_, [A]>, &[B], A: Clone }
__impl_slice_eq1! { [] Cow<'_, [A]>, &mut [B], A: Clone }
@ -2371,6 +2373,9 @@ __impl_slice_eq1! { [const N: usize] Vec<A>, &[B; N], [B; N]: LengthAtMost32 }
// NOTE: some less important impls are omitted to reduce code bloat
// FIXME(Centril): Reconsider this?
//__impl_slice_eq1! { [const N: usize] Vec<A>, &mut [B; N], [B; N]: LengthAtMost32 }
//__impl_slice_eq1! { [const N: usize] [A; N], Vec<B>, [A; N]: LengthAtMost32 }
//__impl_slice_eq1! { [const N: usize] &[A; N], Vec<B>, [A; N]: LengthAtMost32 }
//__impl_slice_eq1! { [const N: usize] &mut [A; N], Vec<B>, [A; N]: LengthAtMost32 }
//__impl_slice_eq1! { [const N: usize] Cow<'a, [A]>, [B; N], [B; N]: LengthAtMost32 }
//__impl_slice_eq1! { [const N: usize] Cow<'a, [A]>, &[B; N], [B; N]: LengthAtMost32 }
//__impl_slice_eq1! { [const N: usize] Cow<'a, [A]>, &mut [B; N], [B; N]: LengthAtMost32 }