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5779815f89
Add PartialEq impls for Vec <-> slice This is a follow-up to #71660 and rust-lang/rfcs#2917 to add two more missing vec/slice PartialEq impls: ``` impl<A, B> PartialEq<[B]> for Vec<A> where A: PartialEq<B> { .. } impl<A, B> PartialEq<Vec<B>> for [A] where A: PartialEq<B> { .. } ``` Since this is insta-stable, it should go through the `@rust-lang/libs` FCP process. Note that I used version 1.47.0 for the `stable` attribute because I assume this will not merge before the 1.46.0 branch is cut next week.
1915 lines
50 KiB
Rust
1915 lines
50 KiB
Rust
use std::borrow::Cow;
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use std::cell::Cell;
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use std::collections::TryReserveError::*;
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use std::fmt::Debug;
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use std::iter::InPlaceIterable;
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use std::mem::size_of;
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use std::ops::Bound::*;
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use std::panic::{catch_unwind, AssertUnwindSafe};
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use std::rc::Rc;
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use std::vec::{Drain, IntoIter};
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struct DropCounter<'a> {
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count: &'a mut u32,
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}
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impl Drop for DropCounter<'_> {
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fn drop(&mut self) {
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*self.count += 1;
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}
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}
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#[test]
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fn test_small_vec_struct() {
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assert_eq!(size_of::<Vec<u8>>(), size_of::<usize>() * 3);
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}
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#[test]
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fn test_double_drop() {
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struct TwoVec<T> {
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x: Vec<T>,
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y: Vec<T>,
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}
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let (mut count_x, mut count_y) = (0, 0);
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{
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let mut tv = TwoVec { x: Vec::new(), y: Vec::new() };
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tv.x.push(DropCounter { count: &mut count_x });
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tv.y.push(DropCounter { count: &mut count_y });
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// If Vec had a drop flag, here is where it would be zeroed.
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// Instead, it should rely on its internal state to prevent
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// doing anything significant when dropped multiple times.
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drop(tv.x);
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// Here tv goes out of scope, tv.y should be dropped, but not tv.x.
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}
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assert_eq!(count_x, 1);
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assert_eq!(count_y, 1);
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}
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#[test]
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fn test_reserve() {
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let mut v = Vec::new();
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assert_eq!(v.capacity(), 0);
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v.reserve(2);
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assert!(v.capacity() >= 2);
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for i in 0..16 {
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v.push(i);
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}
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assert!(v.capacity() >= 16);
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v.reserve(16);
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assert!(v.capacity() >= 32);
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v.push(16);
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v.reserve(16);
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assert!(v.capacity() >= 33)
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}
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#[test]
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fn test_zst_capacity() {
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assert_eq!(Vec::<()>::new().capacity(), usize::MAX);
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}
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#[test]
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fn test_indexing() {
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let v: Vec<isize> = vec![10, 20];
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assert_eq!(v[0], 10);
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assert_eq!(v[1], 20);
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let mut x: usize = 0;
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assert_eq!(v[x], 10);
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assert_eq!(v[x + 1], 20);
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x = x + 1;
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assert_eq!(v[x], 20);
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assert_eq!(v[x - 1], 10);
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}
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#[test]
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fn test_debug_fmt() {
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let vec1: Vec<isize> = vec![];
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assert_eq!("[]", format!("{:?}", vec1));
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let vec2 = vec![0, 1];
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assert_eq!("[0, 1]", format!("{:?}", vec2));
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let slice: &[isize] = &[4, 5];
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assert_eq!("[4, 5]", format!("{:?}", slice));
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}
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#[test]
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fn test_push() {
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let mut v = vec![];
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v.push(1);
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assert_eq!(v, [1]);
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v.push(2);
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assert_eq!(v, [1, 2]);
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v.push(3);
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assert_eq!(v, [1, 2, 3]);
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}
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#[test]
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fn test_extend() {
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let mut v = Vec::new();
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let mut w = Vec::new();
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v.extend(w.clone());
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assert_eq!(v, &[]);
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v.extend(0..3);
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for i in 0..3 {
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w.push(i)
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}
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assert_eq!(v, w);
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v.extend(3..10);
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for i in 3..10 {
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w.push(i)
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}
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assert_eq!(v, w);
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v.extend(w.clone()); // specializes to `append`
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assert!(v.iter().eq(w.iter().chain(w.iter())));
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// Zero sized types
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#[derive(PartialEq, Debug)]
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struct Foo;
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let mut a = Vec::new();
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let b = vec![Foo, Foo];
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a.extend(b);
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assert_eq!(a, &[Foo, Foo]);
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// Double drop
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let mut count_x = 0;
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{
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let mut x = Vec::new();
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let y = vec![DropCounter { count: &mut count_x }];
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x.extend(y);
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}
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assert_eq!(count_x, 1);
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}
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#[test]
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fn test_extend_from_slice() {
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let a: Vec<isize> = vec![1, 2, 3, 4, 5];
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let b: Vec<isize> = vec![6, 7, 8, 9, 0];
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let mut v: Vec<isize> = a;
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v.extend_from_slice(&b);
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assert_eq!(v, [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]);
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}
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#[test]
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fn test_extend_ref() {
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let mut v = vec![1, 2];
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v.extend(&[3, 4, 5]);
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assert_eq!(v.len(), 5);
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assert_eq!(v, [1, 2, 3, 4, 5]);
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let w = vec![6, 7];
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v.extend(&w);
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assert_eq!(v.len(), 7);
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assert_eq!(v, [1, 2, 3, 4, 5, 6, 7]);
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}
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#[test]
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fn test_slice_from_ref() {
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let values = vec![1, 2, 3, 4, 5];
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let slice = &values[1..3];
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assert_eq!(slice, [2, 3]);
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}
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#[test]
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fn test_slice_from_mut() {
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let mut values = vec![1, 2, 3, 4, 5];
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{
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let slice = &mut values[2..];
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assert!(slice == [3, 4, 5]);
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for p in slice {
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*p += 2;
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}
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}
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assert!(values == [1, 2, 5, 6, 7]);
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}
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#[test]
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fn test_slice_to_mut() {
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let mut values = vec![1, 2, 3, 4, 5];
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{
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let slice = &mut values[..2];
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assert!(slice == [1, 2]);
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for p in slice {
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*p += 1;
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}
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}
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assert!(values == [2, 3, 3, 4, 5]);
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}
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#[test]
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fn test_split_at_mut() {
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let mut values = vec![1, 2, 3, 4, 5];
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{
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let (left, right) = values.split_at_mut(2);
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{
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let left: &[_] = left;
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assert!(&left[..left.len()] == &[1, 2]);
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}
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for p in left {
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*p += 1;
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}
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{
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let right: &[_] = right;
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assert!(&right[..right.len()] == &[3, 4, 5]);
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}
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for p in right {
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*p += 2;
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}
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}
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assert_eq!(values, [2, 3, 5, 6, 7]);
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}
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#[test]
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fn test_clone() {
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let v: Vec<i32> = vec![];
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let w = vec![1, 2, 3];
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assert_eq!(v, v.clone());
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let z = w.clone();
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assert_eq!(w, z);
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// they should be disjoint in memory.
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assert!(w.as_ptr() != z.as_ptr())
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}
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#[test]
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fn test_clone_from() {
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let mut v = vec![];
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let three: Vec<Box<_>> = vec![box 1, box 2, box 3];
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let two: Vec<Box<_>> = vec![box 4, box 5];
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// zero, long
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v.clone_from(&three);
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assert_eq!(v, three);
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// equal
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v.clone_from(&three);
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assert_eq!(v, three);
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// long, short
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v.clone_from(&two);
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assert_eq!(v, two);
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// short, long
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v.clone_from(&three);
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assert_eq!(v, three)
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}
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#[test]
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fn test_retain() {
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let mut vec = vec![1, 2, 3, 4];
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vec.retain(|&x| x % 2 == 0);
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assert_eq!(vec, [2, 4]);
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}
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#[test]
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fn test_dedup() {
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fn case(a: Vec<i32>, b: Vec<i32>) {
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let mut v = a;
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v.dedup();
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assert_eq!(v, b);
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}
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case(vec![], vec![]);
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case(vec![1], vec![1]);
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case(vec![1, 1], vec![1]);
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case(vec![1, 2, 3], vec![1, 2, 3]);
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case(vec![1, 1, 2, 3], vec![1, 2, 3]);
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case(vec![1, 2, 2, 3], vec![1, 2, 3]);
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case(vec![1, 2, 3, 3], vec![1, 2, 3]);
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case(vec![1, 1, 2, 2, 2, 3, 3], vec![1, 2, 3]);
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}
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#[test]
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fn test_dedup_by_key() {
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fn case(a: Vec<i32>, b: Vec<i32>) {
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let mut v = a;
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v.dedup_by_key(|i| *i / 10);
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assert_eq!(v, b);
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}
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case(vec![], vec![]);
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case(vec![10], vec![10]);
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case(vec![10, 11], vec![10]);
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case(vec![10, 20, 30], vec![10, 20, 30]);
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case(vec![10, 11, 20, 30], vec![10, 20, 30]);
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case(vec![10, 20, 21, 30], vec![10, 20, 30]);
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case(vec![10, 20, 30, 31], vec![10, 20, 30]);
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case(vec![10, 11, 20, 21, 22, 30, 31], vec![10, 20, 30]);
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}
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#[test]
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fn test_dedup_by() {
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let mut vec = vec!["foo", "bar", "Bar", "baz", "bar"];
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vec.dedup_by(|a, b| a.eq_ignore_ascii_case(b));
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assert_eq!(vec, ["foo", "bar", "baz", "bar"]);
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let mut vec = vec![("foo", 1), ("foo", 2), ("bar", 3), ("bar", 4), ("bar", 5)];
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vec.dedup_by(|a, b| {
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a.0 == b.0 && {
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b.1 += a.1;
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true
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}
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});
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assert_eq!(vec, [("foo", 3), ("bar", 12)]);
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}
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#[test]
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fn test_dedup_unique() {
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let mut v0: Vec<Box<_>> = vec![box 1, box 1, box 2, box 3];
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v0.dedup();
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let mut v1: Vec<Box<_>> = vec![box 1, box 2, box 2, box 3];
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v1.dedup();
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let mut v2: Vec<Box<_>> = vec![box 1, box 2, box 3, box 3];
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v2.dedup();
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// If the boxed pointers were leaked or otherwise misused, valgrind
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// and/or rt should raise errors.
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}
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#[test]
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fn zero_sized_values() {
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let mut v = Vec::new();
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assert_eq!(v.len(), 0);
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v.push(());
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assert_eq!(v.len(), 1);
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v.push(());
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assert_eq!(v.len(), 2);
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assert_eq!(v.pop(), Some(()));
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assert_eq!(v.pop(), Some(()));
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assert_eq!(v.pop(), None);
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assert_eq!(v.iter().count(), 0);
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v.push(());
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assert_eq!(v.iter().count(), 1);
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v.push(());
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assert_eq!(v.iter().count(), 2);
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for &() in &v {}
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assert_eq!(v.iter_mut().count(), 2);
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v.push(());
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assert_eq!(v.iter_mut().count(), 3);
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v.push(());
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assert_eq!(v.iter_mut().count(), 4);
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for &mut () in &mut v {}
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unsafe {
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v.set_len(0);
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}
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assert_eq!(v.iter_mut().count(), 0);
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}
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#[test]
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fn test_partition() {
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assert_eq!(vec![].into_iter().partition(|x: &i32| *x < 3), (vec![], vec![]));
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assert_eq!(vec![1, 2, 3].into_iter().partition(|x| *x < 4), (vec![1, 2, 3], vec![]));
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assert_eq!(vec![1, 2, 3].into_iter().partition(|x| *x < 2), (vec![1], vec![2, 3]));
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assert_eq!(vec![1, 2, 3].into_iter().partition(|x| *x < 0), (vec![], vec![1, 2, 3]));
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}
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#[test]
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fn test_zip_unzip() {
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let z1 = vec![(1, 4), (2, 5), (3, 6)];
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let (left, right): (Vec<_>, Vec<_>) = z1.iter().cloned().unzip();
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assert_eq!((1, 4), (left[0], right[0]));
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assert_eq!((2, 5), (left[1], right[1]));
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assert_eq!((3, 6), (left[2], right[2]));
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}
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#[test]
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fn test_cmp() {
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let x: &[isize] = &[1, 2, 3, 4, 5];
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let cmp: &[isize] = &[1, 2, 3, 4, 5];
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assert_eq!(&x[..], cmp);
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let cmp: &[isize] = &[3, 4, 5];
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assert_eq!(&x[2..], cmp);
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let cmp: &[isize] = &[1, 2, 3];
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assert_eq!(&x[..3], cmp);
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let cmp: &[isize] = &[2, 3, 4];
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assert_eq!(&x[1..4], cmp);
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let x: Vec<isize> = vec![1, 2, 3, 4, 5];
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let cmp: &[isize] = &[1, 2, 3, 4, 5];
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assert_eq!(&x[..], cmp);
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let cmp: &[isize] = &[3, 4, 5];
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assert_eq!(&x[2..], cmp);
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let cmp: &[isize] = &[1, 2, 3];
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assert_eq!(&x[..3], cmp);
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let cmp: &[isize] = &[2, 3, 4];
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assert_eq!(&x[1..4], cmp);
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}
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#[test]
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fn test_vec_truncate_drop() {
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static mut DROPS: u32 = 0;
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struct Elem(i32);
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impl Drop for Elem {
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fn drop(&mut self) {
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unsafe {
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DROPS += 1;
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}
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}
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}
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let mut v = vec![Elem(1), Elem(2), Elem(3), Elem(4), Elem(5)];
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assert_eq!(unsafe { DROPS }, 0);
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v.truncate(3);
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assert_eq!(unsafe { DROPS }, 2);
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v.truncate(0);
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assert_eq!(unsafe { DROPS }, 5);
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}
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#[test]
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#[should_panic]
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fn test_vec_truncate_fail() {
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struct BadElem(i32);
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impl Drop for BadElem {
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fn drop(&mut self) {
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let BadElem(ref mut x) = *self;
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if *x == 0xbadbeef {
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panic!("BadElem panic: 0xbadbeef")
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}
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}
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}
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let mut v = vec![BadElem(1), BadElem(2), BadElem(0xbadbeef), BadElem(4)];
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v.truncate(0);
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}
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#[test]
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fn test_index() {
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let vec = vec![1, 2, 3];
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assert!(vec[1] == 2);
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}
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#[test]
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#[should_panic]
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fn test_index_out_of_bounds() {
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let vec = vec![1, 2, 3];
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let _ = vec[3];
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}
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#[test]
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#[should_panic]
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fn test_slice_out_of_bounds_1() {
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let x = vec![1, 2, 3, 4, 5];
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&x[!0..];
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}
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#[test]
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#[should_panic]
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fn test_slice_out_of_bounds_2() {
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let x = vec![1, 2, 3, 4, 5];
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&x[..6];
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}
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#[test]
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#[should_panic]
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fn test_slice_out_of_bounds_3() {
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let x = vec![1, 2, 3, 4, 5];
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&x[!0..4];
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}
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#[test]
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#[should_panic]
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fn test_slice_out_of_bounds_4() {
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let x = vec![1, 2, 3, 4, 5];
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&x[1..6];
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}
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#[test]
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#[should_panic]
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fn test_slice_out_of_bounds_5() {
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let x = vec![1, 2, 3, 4, 5];
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&x[3..2];
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}
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#[test]
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#[should_panic]
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fn test_swap_remove_empty() {
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let mut vec = Vec::<i32>::new();
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vec.swap_remove(0);
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}
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|
#[test]
|
|
fn test_move_items() {
|
|
let vec = vec![1, 2, 3];
|
|
let mut vec2 = vec![];
|
|
for i in vec {
|
|
vec2.push(i);
|
|
}
|
|
assert_eq!(vec2, [1, 2, 3]);
|
|
}
|
|
|
|
#[test]
|
|
fn test_move_items_reverse() {
|
|
let vec = vec![1, 2, 3];
|
|
let mut vec2 = vec![];
|
|
for i in vec.into_iter().rev() {
|
|
vec2.push(i);
|
|
}
|
|
assert_eq!(vec2, [3, 2, 1]);
|
|
}
|
|
|
|
#[test]
|
|
fn test_move_items_zero_sized() {
|
|
let vec = vec![(), (), ()];
|
|
let mut vec2 = vec![];
|
|
for i in vec {
|
|
vec2.push(i);
|
|
}
|
|
assert_eq!(vec2, [(), (), ()]);
|
|
}
|
|
|
|
#[test]
|
|
fn test_drain_items() {
|
|
let mut vec = vec![1, 2, 3];
|
|
let mut vec2 = vec![];
|
|
for i in vec.drain(..) {
|
|
vec2.push(i);
|
|
}
|
|
assert_eq!(vec, []);
|
|
assert_eq!(vec2, [1, 2, 3]);
|
|
}
|
|
|
|
#[test]
|
|
fn test_drain_items_reverse() {
|
|
let mut vec = vec![1, 2, 3];
|
|
let mut vec2 = vec![];
|
|
for i in vec.drain(..).rev() {
|
|
vec2.push(i);
|
|
}
|
|
assert_eq!(vec, []);
|
|
assert_eq!(vec2, [3, 2, 1]);
|
|
}
|
|
|
|
#[test]
|
|
fn test_drain_items_zero_sized() {
|
|
let mut vec = vec![(), (), ()];
|
|
let mut vec2 = vec![];
|
|
for i in vec.drain(..) {
|
|
vec2.push(i);
|
|
}
|
|
assert_eq!(vec, []);
|
|
assert_eq!(vec2, [(), (), ()]);
|
|
}
|
|
|
|
#[test]
|
|
#[should_panic]
|
|
fn test_drain_out_of_bounds() {
|
|
let mut v = vec![1, 2, 3, 4, 5];
|
|
v.drain(5..6);
|
|
}
|
|
|
|
#[test]
|
|
fn test_drain_range() {
|
|
let mut v = vec![1, 2, 3, 4, 5];
|
|
for _ in v.drain(4..) {}
|
|
assert_eq!(v, &[1, 2, 3, 4]);
|
|
|
|
let mut v: Vec<_> = (1..6).map(|x| x.to_string()).collect();
|
|
for _ in v.drain(1..4) {}
|
|
assert_eq!(v, &[1.to_string(), 5.to_string()]);
|
|
|
|
let mut v: Vec<_> = (1..6).map(|x| x.to_string()).collect();
|
|
for _ in v.drain(1..4).rev() {}
|
|
assert_eq!(v, &[1.to_string(), 5.to_string()]);
|
|
|
|
let mut v: Vec<_> = vec![(); 5];
|
|
for _ in v.drain(1..4).rev() {}
|
|
assert_eq!(v, &[(), ()]);
|
|
}
|
|
|
|
#[test]
|
|
fn test_drain_inclusive_range() {
|
|
let mut v = vec!['a', 'b', 'c', 'd', 'e'];
|
|
for _ in v.drain(1..=3) {}
|
|
assert_eq!(v, &['a', 'e']);
|
|
|
|
let mut v: Vec<_> = (0..=5).map(|x| x.to_string()).collect();
|
|
for _ in v.drain(1..=5) {}
|
|
assert_eq!(v, &["0".to_string()]);
|
|
|
|
let mut v: Vec<String> = (0..=5).map(|x| x.to_string()).collect();
|
|
for _ in v.drain(0..=5) {}
|
|
assert_eq!(v, Vec::<String>::new());
|
|
|
|
let mut v: Vec<_> = (0..=5).map(|x| x.to_string()).collect();
|
|
for _ in v.drain(0..=3) {}
|
|
assert_eq!(v, &["4".to_string(), "5".to_string()]);
|
|
|
|
let mut v: Vec<_> = (0..=1).map(|x| x.to_string()).collect();
|
|
for _ in v.drain(..=0) {}
|
|
assert_eq!(v, &["1".to_string()]);
|
|
}
|
|
|
|
#[test]
|
|
fn test_drain_max_vec_size() {
|
|
let mut v = Vec::<()>::with_capacity(usize::MAX);
|
|
unsafe {
|
|
v.set_len(usize::MAX);
|
|
}
|
|
for _ in v.drain(usize::MAX - 1..) {}
|
|
assert_eq!(v.len(), usize::MAX - 1);
|
|
|
|
let mut v = Vec::<()>::with_capacity(usize::MAX);
|
|
unsafe {
|
|
v.set_len(usize::MAX);
|
|
}
|
|
for _ in v.drain(usize::MAX - 1..=usize::MAX - 1) {}
|
|
assert_eq!(v.len(), usize::MAX - 1);
|
|
}
|
|
|
|
#[test]
|
|
#[should_panic]
|
|
fn test_drain_index_overflow() {
|
|
let mut v = Vec::<()>::with_capacity(usize::MAX);
|
|
unsafe {
|
|
v.set_len(usize::MAX);
|
|
}
|
|
v.drain(0..=usize::MAX);
|
|
}
|
|
|
|
#[test]
|
|
#[should_panic]
|
|
fn test_drain_inclusive_out_of_bounds() {
|
|
let mut v = vec![1, 2, 3, 4, 5];
|
|
v.drain(5..=5);
|
|
}
|
|
|
|
#[test]
|
|
#[should_panic]
|
|
fn test_drain_start_overflow() {
|
|
let mut v = vec![1, 2, 3];
|
|
v.drain((Excluded(usize::MAX), Included(0)));
|
|
}
|
|
|
|
#[test]
|
|
#[should_panic]
|
|
fn test_drain_end_overflow() {
|
|
let mut v = vec![1, 2, 3];
|
|
v.drain((Included(0), Included(usize::MAX)));
|
|
}
|
|
|
|
#[test]
|
|
fn test_drain_leak() {
|
|
static mut DROPS: i32 = 0;
|
|
|
|
#[derive(Debug, PartialEq)]
|
|
struct D(u32, bool);
|
|
|
|
impl Drop for D {
|
|
fn drop(&mut self) {
|
|
unsafe {
|
|
DROPS += 1;
|
|
}
|
|
|
|
if self.1 {
|
|
panic!("panic in `drop`");
|
|
}
|
|
}
|
|
}
|
|
|
|
let mut v = vec![
|
|
D(0, false),
|
|
D(1, false),
|
|
D(2, false),
|
|
D(3, false),
|
|
D(4, true),
|
|
D(5, false),
|
|
D(6, false),
|
|
];
|
|
|
|
catch_unwind(AssertUnwindSafe(|| {
|
|
v.drain(2..=5);
|
|
}))
|
|
.ok();
|
|
|
|
assert_eq!(unsafe { DROPS }, 4);
|
|
assert_eq!(v, vec![D(0, false), D(1, false), D(6, false),]);
|
|
}
|
|
|
|
#[test]
|
|
fn test_splice() {
|
|
let mut v = vec![1, 2, 3, 4, 5];
|
|
let a = [10, 11, 12];
|
|
v.splice(2..4, a.iter().cloned());
|
|
assert_eq!(v, &[1, 2, 10, 11, 12, 5]);
|
|
v.splice(1..3, Some(20));
|
|
assert_eq!(v, &[1, 20, 11, 12, 5]);
|
|
}
|
|
|
|
#[test]
|
|
fn test_splice_inclusive_range() {
|
|
let mut v = vec![1, 2, 3, 4, 5];
|
|
let a = [10, 11, 12];
|
|
let t1: Vec<_> = v.splice(2..=3, a.iter().cloned()).collect();
|
|
assert_eq!(v, &[1, 2, 10, 11, 12, 5]);
|
|
assert_eq!(t1, &[3, 4]);
|
|
let t2: Vec<_> = v.splice(1..=2, Some(20)).collect();
|
|
assert_eq!(v, &[1, 20, 11, 12, 5]);
|
|
assert_eq!(t2, &[2, 10]);
|
|
}
|
|
|
|
#[test]
|
|
#[should_panic]
|
|
fn test_splice_out_of_bounds() {
|
|
let mut v = vec![1, 2, 3, 4, 5];
|
|
let a = [10, 11, 12];
|
|
v.splice(5..6, a.iter().cloned());
|
|
}
|
|
|
|
#[test]
|
|
#[should_panic]
|
|
fn test_splice_inclusive_out_of_bounds() {
|
|
let mut v = vec![1, 2, 3, 4, 5];
|
|
let a = [10, 11, 12];
|
|
v.splice(5..=5, a.iter().cloned());
|
|
}
|
|
|
|
#[test]
|
|
fn test_splice_items_zero_sized() {
|
|
let mut vec = vec![(), (), ()];
|
|
let vec2 = vec![];
|
|
let t: Vec<_> = vec.splice(1..2, vec2.iter().cloned()).collect();
|
|
assert_eq!(vec, &[(), ()]);
|
|
assert_eq!(t, &[()]);
|
|
}
|
|
|
|
#[test]
|
|
fn test_splice_unbounded() {
|
|
let mut vec = vec![1, 2, 3, 4, 5];
|
|
let t: Vec<_> = vec.splice(.., None).collect();
|
|
assert_eq!(vec, &[]);
|
|
assert_eq!(t, &[1, 2, 3, 4, 5]);
|
|
}
|
|
|
|
#[test]
|
|
fn test_splice_forget() {
|
|
let mut v = vec![1, 2, 3, 4, 5];
|
|
let a = [10, 11, 12];
|
|
std::mem::forget(v.splice(2..4, a.iter().cloned()));
|
|
assert_eq!(v, &[1, 2]);
|
|
}
|
|
|
|
#[test]
|
|
fn test_into_boxed_slice() {
|
|
let xs = vec![1, 2, 3];
|
|
let ys = xs.into_boxed_slice();
|
|
assert_eq!(&*ys, [1, 2, 3]);
|
|
}
|
|
|
|
#[test]
|
|
fn test_append() {
|
|
let mut vec = vec![1, 2, 3];
|
|
let mut vec2 = vec![4, 5, 6];
|
|
vec.append(&mut vec2);
|
|
assert_eq!(vec, [1, 2, 3, 4, 5, 6]);
|
|
assert_eq!(vec2, []);
|
|
}
|
|
|
|
#[test]
|
|
fn test_split_off() {
|
|
let mut vec = vec![1, 2, 3, 4, 5, 6];
|
|
let orig_capacity = vec.capacity();
|
|
let vec2 = vec.split_off(4);
|
|
assert_eq!(vec, [1, 2, 3, 4]);
|
|
assert_eq!(vec2, [5, 6]);
|
|
assert_eq!(vec.capacity(), orig_capacity);
|
|
}
|
|
|
|
#[test]
|
|
fn test_split_off_take_all() {
|
|
let mut vec = vec![1, 2, 3, 4, 5, 6];
|
|
let orig_ptr = vec.as_ptr();
|
|
let orig_capacity = vec.capacity();
|
|
let vec2 = vec.split_off(0);
|
|
assert_eq!(vec, []);
|
|
assert_eq!(vec2, [1, 2, 3, 4, 5, 6]);
|
|
assert_eq!(vec.capacity(), orig_capacity);
|
|
assert_eq!(vec2.as_ptr(), orig_ptr);
|
|
}
|
|
|
|
#[test]
|
|
fn test_into_iter_as_slice() {
|
|
let vec = vec!['a', 'b', 'c'];
|
|
let mut into_iter = vec.into_iter();
|
|
assert_eq!(into_iter.as_slice(), &['a', 'b', 'c']);
|
|
let _ = into_iter.next().unwrap();
|
|
assert_eq!(into_iter.as_slice(), &['b', 'c']);
|
|
let _ = into_iter.next().unwrap();
|
|
let _ = into_iter.next().unwrap();
|
|
assert_eq!(into_iter.as_slice(), &[]);
|
|
}
|
|
|
|
#[test]
|
|
fn test_into_iter_as_mut_slice() {
|
|
let vec = vec!['a', 'b', 'c'];
|
|
let mut into_iter = vec.into_iter();
|
|
assert_eq!(into_iter.as_slice(), &['a', 'b', 'c']);
|
|
into_iter.as_mut_slice()[0] = 'x';
|
|
into_iter.as_mut_slice()[1] = 'y';
|
|
assert_eq!(into_iter.next().unwrap(), 'x');
|
|
assert_eq!(into_iter.as_slice(), &['y', 'c']);
|
|
}
|
|
|
|
#[test]
|
|
fn test_into_iter_debug() {
|
|
let vec = vec!['a', 'b', 'c'];
|
|
let into_iter = vec.into_iter();
|
|
let debug = format!("{:?}", into_iter);
|
|
assert_eq!(debug, "IntoIter(['a', 'b', 'c'])");
|
|
}
|
|
|
|
#[test]
|
|
fn test_into_iter_count() {
|
|
assert_eq!(vec![1, 2, 3].into_iter().count(), 3);
|
|
}
|
|
|
|
#[test]
|
|
fn test_into_iter_clone() {
|
|
fn iter_equal<I: Iterator<Item = i32>>(it: I, slice: &[i32]) {
|
|
let v: Vec<i32> = it.collect();
|
|
assert_eq!(&v[..], slice);
|
|
}
|
|
let mut it = vec![1, 2, 3].into_iter();
|
|
iter_equal(it.clone(), &[1, 2, 3]);
|
|
assert_eq!(it.next(), Some(1));
|
|
let mut it = it.rev();
|
|
iter_equal(it.clone(), &[3, 2]);
|
|
assert_eq!(it.next(), Some(3));
|
|
iter_equal(it.clone(), &[2]);
|
|
assert_eq!(it.next(), Some(2));
|
|
iter_equal(it.clone(), &[]);
|
|
assert_eq!(it.next(), None);
|
|
}
|
|
|
|
#[test]
|
|
fn test_into_iter_leak() {
|
|
static mut DROPS: i32 = 0;
|
|
|
|
struct D(bool);
|
|
|
|
impl Drop for D {
|
|
fn drop(&mut self) {
|
|
unsafe {
|
|
DROPS += 1;
|
|
}
|
|
|
|
if self.0 {
|
|
panic!("panic in `drop`");
|
|
}
|
|
}
|
|
}
|
|
|
|
let v = vec![D(false), D(true), D(false)];
|
|
|
|
catch_unwind(move || drop(v.into_iter())).ok();
|
|
|
|
assert_eq!(unsafe { DROPS }, 3);
|
|
}
|
|
|
|
#[test]
|
|
fn test_from_iter_specialization() {
|
|
let src: Vec<usize> = vec![0usize; 1];
|
|
let srcptr = src.as_ptr();
|
|
let sink = src.into_iter().collect::<Vec<_>>();
|
|
let sinkptr = sink.as_ptr();
|
|
assert_eq!(srcptr, sinkptr);
|
|
}
|
|
|
|
#[test]
|
|
fn test_from_iter_partially_drained_in_place_specialization() {
|
|
let src: Vec<usize> = vec![0usize; 10];
|
|
let srcptr = src.as_ptr();
|
|
let mut iter = src.into_iter();
|
|
iter.next();
|
|
iter.next();
|
|
let sink = iter.collect::<Vec<_>>();
|
|
let sinkptr = sink.as_ptr();
|
|
assert_eq!(srcptr, sinkptr);
|
|
}
|
|
|
|
#[test]
|
|
fn test_from_iter_specialization_with_iterator_adapters() {
|
|
fn assert_in_place_trait<T: InPlaceIterable>(_: &T) {};
|
|
let src: Vec<usize> = vec![0usize; 256];
|
|
let srcptr = src.as_ptr();
|
|
let iter = src
|
|
.into_iter()
|
|
.enumerate()
|
|
.map(|i| i.0 + i.1)
|
|
.zip(std::iter::repeat(1usize))
|
|
.map(|(a, b)| a + b)
|
|
.map_while(Option::Some)
|
|
.peekable()
|
|
.skip(1)
|
|
.map(|e| std::num::NonZeroUsize::new(e));
|
|
assert_in_place_trait(&iter);
|
|
let sink = iter.collect::<Vec<_>>();
|
|
let sinkptr = sink.as_ptr();
|
|
assert_eq!(srcptr, sinkptr as *const usize);
|
|
}
|
|
|
|
#[test]
|
|
fn test_from_iter_specialization_head_tail_drop() {
|
|
let drop_count: Vec<_> = (0..=2).map(|_| Rc::new(())).collect();
|
|
let src: Vec<_> = drop_count.iter().cloned().collect();
|
|
let srcptr = src.as_ptr();
|
|
let iter = src.into_iter();
|
|
let sink: Vec<_> = iter.skip(1).take(1).collect();
|
|
let sinkptr = sink.as_ptr();
|
|
assert_eq!(srcptr, sinkptr, "specialization was applied");
|
|
assert_eq!(Rc::strong_count(&drop_count[0]), 1, "front was dropped");
|
|
assert_eq!(Rc::strong_count(&drop_count[1]), 2, "one element was collected");
|
|
assert_eq!(Rc::strong_count(&drop_count[2]), 1, "tail was dropped");
|
|
assert_eq!(sink.len(), 1);
|
|
}
|
|
|
|
#[test]
|
|
fn test_from_iter_specialization_panic_drop() {
|
|
let drop_count: Vec<_> = (0..=2).map(|_| Rc::new(())).collect();
|
|
let src: Vec<_> = drop_count.iter().cloned().collect();
|
|
let iter = src.into_iter();
|
|
|
|
let _ = std::panic::catch_unwind(AssertUnwindSafe(|| {
|
|
let _ = iter
|
|
.enumerate()
|
|
.filter_map(|(i, e)| {
|
|
if i == 1 {
|
|
std::panic!("aborting iteration");
|
|
}
|
|
Some(e)
|
|
})
|
|
.collect::<Vec<_>>();
|
|
}));
|
|
|
|
assert!(
|
|
drop_count.iter().map(Rc::strong_count).all(|count| count == 1),
|
|
"all items were dropped once"
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn test_cow_from() {
|
|
let borrowed: &[_] = &["borrowed", "(slice)"];
|
|
let owned = vec!["owned", "(vec)"];
|
|
match (Cow::from(owned.clone()), Cow::from(borrowed)) {
|
|
(Cow::Owned(o), Cow::Borrowed(b)) => assert!(o == owned && b == borrowed),
|
|
_ => panic!("invalid `Cow::from`"),
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_from_cow() {
|
|
let borrowed: &[_] = &["borrowed", "(slice)"];
|
|
let owned = vec!["owned", "(vec)"];
|
|
assert_eq!(Vec::from(Cow::Borrowed(borrowed)), vec!["borrowed", "(slice)"]);
|
|
assert_eq!(Vec::from(Cow::Owned(owned)), vec!["owned", "(vec)"]);
|
|
}
|
|
|
|
#[allow(dead_code)]
|
|
fn assert_covariance() {
|
|
fn drain<'new>(d: Drain<'static, &'static str>) -> Drain<'new, &'new str> {
|
|
d
|
|
}
|
|
fn into_iter<'new>(i: IntoIter<&'static str>) -> IntoIter<&'new str> {
|
|
i
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn from_into_inner() {
|
|
let vec = vec![1, 2, 3];
|
|
let ptr = vec.as_ptr();
|
|
let vec = vec.into_iter().collect::<Vec<_>>();
|
|
assert_eq!(vec, [1, 2, 3]);
|
|
assert_eq!(vec.as_ptr(), ptr);
|
|
|
|
let ptr = &vec[1] as *const _;
|
|
let mut it = vec.into_iter();
|
|
it.next().unwrap();
|
|
let vec = it.collect::<Vec<_>>();
|
|
assert_eq!(vec, [2, 3]);
|
|
assert!(ptr != vec.as_ptr());
|
|
}
|
|
|
|
#[test]
|
|
fn overaligned_allocations() {
|
|
#[repr(align(256))]
|
|
struct Foo(usize);
|
|
let mut v = vec![Foo(273)];
|
|
for i in 0..0x1000 {
|
|
v.reserve_exact(i);
|
|
assert!(v[0].0 == 273);
|
|
assert!(v.as_ptr() as usize & 0xff == 0);
|
|
v.shrink_to_fit();
|
|
assert!(v[0].0 == 273);
|
|
assert!(v.as_ptr() as usize & 0xff == 0);
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn drain_filter_empty() {
|
|
let mut vec: Vec<i32> = vec![];
|
|
|
|
{
|
|
let mut iter = vec.drain_filter(|_| true);
|
|
assert_eq!(iter.size_hint(), (0, Some(0)));
|
|
assert_eq!(iter.next(), None);
|
|
assert_eq!(iter.size_hint(), (0, Some(0)));
|
|
assert_eq!(iter.next(), None);
|
|
assert_eq!(iter.size_hint(), (0, Some(0)));
|
|
}
|
|
assert_eq!(vec.len(), 0);
|
|
assert_eq!(vec, vec![]);
|
|
}
|
|
|
|
#[test]
|
|
fn drain_filter_zst() {
|
|
let mut vec = vec![(), (), (), (), ()];
|
|
let initial_len = vec.len();
|
|
let mut count = 0;
|
|
{
|
|
let mut iter = vec.drain_filter(|_| true);
|
|
assert_eq!(iter.size_hint(), (0, Some(initial_len)));
|
|
while let Some(_) = iter.next() {
|
|
count += 1;
|
|
assert_eq!(iter.size_hint(), (0, Some(initial_len - count)));
|
|
}
|
|
assert_eq!(iter.size_hint(), (0, Some(0)));
|
|
assert_eq!(iter.next(), None);
|
|
assert_eq!(iter.size_hint(), (0, Some(0)));
|
|
}
|
|
|
|
assert_eq!(count, initial_len);
|
|
assert_eq!(vec.len(), 0);
|
|
assert_eq!(vec, vec![]);
|
|
}
|
|
|
|
#[test]
|
|
fn drain_filter_false() {
|
|
let mut vec = vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
|
|
|
|
let initial_len = vec.len();
|
|
let mut count = 0;
|
|
{
|
|
let mut iter = vec.drain_filter(|_| false);
|
|
assert_eq!(iter.size_hint(), (0, Some(initial_len)));
|
|
for _ in iter.by_ref() {
|
|
count += 1;
|
|
}
|
|
assert_eq!(iter.size_hint(), (0, Some(0)));
|
|
assert_eq!(iter.next(), None);
|
|
assert_eq!(iter.size_hint(), (0, Some(0)));
|
|
}
|
|
|
|
assert_eq!(count, 0);
|
|
assert_eq!(vec.len(), initial_len);
|
|
assert_eq!(vec, vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
|
|
}
|
|
|
|
#[test]
|
|
fn drain_filter_true() {
|
|
let mut vec = vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
|
|
|
|
let initial_len = vec.len();
|
|
let mut count = 0;
|
|
{
|
|
let mut iter = vec.drain_filter(|_| true);
|
|
assert_eq!(iter.size_hint(), (0, Some(initial_len)));
|
|
while let Some(_) = iter.next() {
|
|
count += 1;
|
|
assert_eq!(iter.size_hint(), (0, Some(initial_len - count)));
|
|
}
|
|
assert_eq!(iter.size_hint(), (0, Some(0)));
|
|
assert_eq!(iter.next(), None);
|
|
assert_eq!(iter.size_hint(), (0, Some(0)));
|
|
}
|
|
|
|
assert_eq!(count, initial_len);
|
|
assert_eq!(vec.len(), 0);
|
|
assert_eq!(vec, vec![]);
|
|
}
|
|
|
|
#[test]
|
|
fn drain_filter_complex() {
|
|
{
|
|
// [+xxx++++++xxxxx++++x+x++]
|
|
let mut vec = vec![
|
|
1, 2, 4, 6, 7, 9, 11, 13, 15, 17, 18, 20, 22, 24, 26, 27, 29, 31, 33, 34, 35, 36, 37,
|
|
39,
|
|
];
|
|
|
|
let removed = vec.drain_filter(|x| *x % 2 == 0).collect::<Vec<_>>();
|
|
assert_eq!(removed.len(), 10);
|
|
assert_eq!(removed, vec![2, 4, 6, 18, 20, 22, 24, 26, 34, 36]);
|
|
|
|
assert_eq!(vec.len(), 14);
|
|
assert_eq!(vec, vec![1, 7, 9, 11, 13, 15, 17, 27, 29, 31, 33, 35, 37, 39]);
|
|
}
|
|
|
|
{
|
|
// [xxx++++++xxxxx++++x+x++]
|
|
let mut vec = vec![
|
|
2, 4, 6, 7, 9, 11, 13, 15, 17, 18, 20, 22, 24, 26, 27, 29, 31, 33, 34, 35, 36, 37, 39,
|
|
];
|
|
|
|
let removed = vec.drain_filter(|x| *x % 2 == 0).collect::<Vec<_>>();
|
|
assert_eq!(removed.len(), 10);
|
|
assert_eq!(removed, vec![2, 4, 6, 18, 20, 22, 24, 26, 34, 36]);
|
|
|
|
assert_eq!(vec.len(), 13);
|
|
assert_eq!(vec, vec![7, 9, 11, 13, 15, 17, 27, 29, 31, 33, 35, 37, 39]);
|
|
}
|
|
|
|
{
|
|
// [xxx++++++xxxxx++++x+x]
|
|
let mut vec =
|
|
vec![2, 4, 6, 7, 9, 11, 13, 15, 17, 18, 20, 22, 24, 26, 27, 29, 31, 33, 34, 35, 36];
|
|
|
|
let removed = vec.drain_filter(|x| *x % 2 == 0).collect::<Vec<_>>();
|
|
assert_eq!(removed.len(), 10);
|
|
assert_eq!(removed, vec![2, 4, 6, 18, 20, 22, 24, 26, 34, 36]);
|
|
|
|
assert_eq!(vec.len(), 11);
|
|
assert_eq!(vec, vec![7, 9, 11, 13, 15, 17, 27, 29, 31, 33, 35]);
|
|
}
|
|
|
|
{
|
|
// [xxxxxxxxxx+++++++++++]
|
|
let mut vec = vec![2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 1, 3, 5, 7, 9, 11, 13, 15, 17, 19];
|
|
|
|
let removed = vec.drain_filter(|x| *x % 2 == 0).collect::<Vec<_>>();
|
|
assert_eq!(removed.len(), 10);
|
|
assert_eq!(removed, vec![2, 4, 6, 8, 10, 12, 14, 16, 18, 20]);
|
|
|
|
assert_eq!(vec.len(), 10);
|
|
assert_eq!(vec, vec![1, 3, 5, 7, 9, 11, 13, 15, 17, 19]);
|
|
}
|
|
|
|
{
|
|
// [+++++++++++xxxxxxxxxx]
|
|
let mut vec = vec![1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20];
|
|
|
|
let removed = vec.drain_filter(|x| *x % 2 == 0).collect::<Vec<_>>();
|
|
assert_eq!(removed.len(), 10);
|
|
assert_eq!(removed, vec![2, 4, 6, 8, 10, 12, 14, 16, 18, 20]);
|
|
|
|
assert_eq!(vec.len(), 10);
|
|
assert_eq!(vec, vec![1, 3, 5, 7, 9, 11, 13, 15, 17, 19]);
|
|
}
|
|
}
|
|
|
|
// FIXME: re-enable emscripten once it can unwind again
|
|
#[test]
|
|
#[cfg(not(target_os = "emscripten"))]
|
|
fn drain_filter_consumed_panic() {
|
|
use std::rc::Rc;
|
|
use std::sync::Mutex;
|
|
|
|
struct Check {
|
|
index: usize,
|
|
drop_counts: Rc<Mutex<Vec<usize>>>,
|
|
};
|
|
|
|
impl Drop for Check {
|
|
fn drop(&mut self) {
|
|
self.drop_counts.lock().unwrap()[self.index] += 1;
|
|
println!("drop: {}", self.index);
|
|
}
|
|
}
|
|
|
|
let check_count = 10;
|
|
let drop_counts = Rc::new(Mutex::new(vec![0_usize; check_count]));
|
|
let mut data: Vec<Check> = (0..check_count)
|
|
.map(|index| Check { index, drop_counts: Rc::clone(&drop_counts) })
|
|
.collect();
|
|
|
|
let _ = std::panic::catch_unwind(move || {
|
|
let filter = |c: &mut Check| {
|
|
if c.index == 2 {
|
|
panic!("panic at index: {}", c.index);
|
|
}
|
|
// Verify that if the filter could panic again on another element
|
|
// that it would not cause a double panic and all elements of the
|
|
// vec would still be dropped exactly once.
|
|
if c.index == 4 {
|
|
panic!("panic at index: {}", c.index);
|
|
}
|
|
c.index < 6
|
|
};
|
|
let drain = data.drain_filter(filter);
|
|
|
|
// NOTE: The DrainFilter is explicitly consumed
|
|
drain.for_each(drop);
|
|
});
|
|
|
|
let drop_counts = drop_counts.lock().unwrap();
|
|
assert_eq!(check_count, drop_counts.len());
|
|
|
|
for (index, count) in drop_counts.iter().cloned().enumerate() {
|
|
assert_eq!(1, count, "unexpected drop count at index: {} (count: {})", index, count);
|
|
}
|
|
}
|
|
|
|
// FIXME: Re-enable emscripten once it can catch panics
|
|
#[test]
|
|
#[cfg(not(target_os = "emscripten"))]
|
|
fn drain_filter_unconsumed_panic() {
|
|
use std::rc::Rc;
|
|
use std::sync::Mutex;
|
|
|
|
struct Check {
|
|
index: usize,
|
|
drop_counts: Rc<Mutex<Vec<usize>>>,
|
|
};
|
|
|
|
impl Drop for Check {
|
|
fn drop(&mut self) {
|
|
self.drop_counts.lock().unwrap()[self.index] += 1;
|
|
println!("drop: {}", self.index);
|
|
}
|
|
}
|
|
|
|
let check_count = 10;
|
|
let drop_counts = Rc::new(Mutex::new(vec![0_usize; check_count]));
|
|
let mut data: Vec<Check> = (0..check_count)
|
|
.map(|index| Check { index, drop_counts: Rc::clone(&drop_counts) })
|
|
.collect();
|
|
|
|
let _ = std::panic::catch_unwind(move || {
|
|
let filter = |c: &mut Check| {
|
|
if c.index == 2 {
|
|
panic!("panic at index: {}", c.index);
|
|
}
|
|
// Verify that if the filter could panic again on another element
|
|
// that it would not cause a double panic and all elements of the
|
|
// vec would still be dropped exactly once.
|
|
if c.index == 4 {
|
|
panic!("panic at index: {}", c.index);
|
|
}
|
|
c.index < 6
|
|
};
|
|
let _drain = data.drain_filter(filter);
|
|
|
|
// NOTE: The DrainFilter is dropped without being consumed
|
|
});
|
|
|
|
let drop_counts = drop_counts.lock().unwrap();
|
|
assert_eq!(check_count, drop_counts.len());
|
|
|
|
for (index, count) in drop_counts.iter().cloned().enumerate() {
|
|
assert_eq!(1, count, "unexpected drop count at index: {} (count: {})", index, count);
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn drain_filter_unconsumed() {
|
|
let mut vec = vec![1, 2, 3, 4];
|
|
let drain = vec.drain_filter(|&mut x| x % 2 != 0);
|
|
drop(drain);
|
|
assert_eq!(vec, [2, 4]);
|
|
}
|
|
|
|
#[test]
|
|
fn test_reserve_exact() {
|
|
// This is all the same as test_reserve
|
|
|
|
let mut v = Vec::new();
|
|
assert_eq!(v.capacity(), 0);
|
|
|
|
v.reserve_exact(2);
|
|
assert!(v.capacity() >= 2);
|
|
|
|
for i in 0..16 {
|
|
v.push(i);
|
|
}
|
|
|
|
assert!(v.capacity() >= 16);
|
|
v.reserve_exact(16);
|
|
assert!(v.capacity() >= 32);
|
|
|
|
v.push(16);
|
|
|
|
v.reserve_exact(16);
|
|
assert!(v.capacity() >= 33)
|
|
}
|
|
|
|
#[test]
|
|
#[cfg_attr(miri, ignore)] // Miri does not support signalling OOM
|
|
#[cfg_attr(target_os = "android", ignore)] // Android used in CI has a broken dlmalloc
|
|
fn test_try_reserve() {
|
|
// These are the interesting cases:
|
|
// * exactly isize::MAX should never trigger a CapacityOverflow (can be OOM)
|
|
// * > isize::MAX should always fail
|
|
// * On 16/32-bit should CapacityOverflow
|
|
// * On 64-bit should OOM
|
|
// * overflow may trigger when adding `len` to `cap` (in number of elements)
|
|
// * overflow may trigger when multiplying `new_cap` by size_of::<T> (to get bytes)
|
|
|
|
const MAX_CAP: usize = isize::MAX as usize;
|
|
const MAX_USIZE: usize = usize::MAX;
|
|
|
|
// On 16/32-bit, we check that allocations don't exceed isize::MAX,
|
|
// on 64-bit, we assume the OS will give an OOM for such a ridiculous size.
|
|
// Any platform that succeeds for these requests is technically broken with
|
|
// ptr::offset because LLVM is the worst.
|
|
let guards_against_isize = usize::BITS < 64;
|
|
|
|
{
|
|
// Note: basic stuff is checked by test_reserve
|
|
let mut empty_bytes: Vec<u8> = Vec::new();
|
|
|
|
// Check isize::MAX doesn't count as an overflow
|
|
if let Err(CapacityOverflow) = empty_bytes.try_reserve(MAX_CAP) {
|
|
panic!("isize::MAX shouldn't trigger an overflow!");
|
|
}
|
|
// Play it again, frank! (just to be sure)
|
|
if let Err(CapacityOverflow) = empty_bytes.try_reserve(MAX_CAP) {
|
|
panic!("isize::MAX shouldn't trigger an overflow!");
|
|
}
|
|
|
|
if guards_against_isize {
|
|
// Check isize::MAX + 1 does count as overflow
|
|
if let Err(CapacityOverflow) = empty_bytes.try_reserve(MAX_CAP + 1) {
|
|
} else {
|
|
panic!("isize::MAX + 1 should trigger an overflow!")
|
|
}
|
|
|
|
// Check usize::MAX does count as overflow
|
|
if let Err(CapacityOverflow) = empty_bytes.try_reserve(MAX_USIZE) {
|
|
} else {
|
|
panic!("usize::MAX should trigger an overflow!")
|
|
}
|
|
} else {
|
|
// Check isize::MAX + 1 is an OOM
|
|
if let Err(AllocError { .. }) = empty_bytes.try_reserve(MAX_CAP + 1) {
|
|
} else {
|
|
panic!("isize::MAX + 1 should trigger an OOM!")
|
|
}
|
|
|
|
// Check usize::MAX is an OOM
|
|
if let Err(AllocError { .. }) = empty_bytes.try_reserve(MAX_USIZE) {
|
|
} else {
|
|
panic!("usize::MAX should trigger an OOM!")
|
|
}
|
|
}
|
|
}
|
|
|
|
{
|
|
// Same basic idea, but with non-zero len
|
|
let mut ten_bytes: Vec<u8> = vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
|
|
|
|
if let Err(CapacityOverflow) = ten_bytes.try_reserve(MAX_CAP - 10) {
|
|
panic!("isize::MAX shouldn't trigger an overflow!");
|
|
}
|
|
if let Err(CapacityOverflow) = ten_bytes.try_reserve(MAX_CAP - 10) {
|
|
panic!("isize::MAX shouldn't trigger an overflow!");
|
|
}
|
|
if guards_against_isize {
|
|
if let Err(CapacityOverflow) = ten_bytes.try_reserve(MAX_CAP - 9) {
|
|
} else {
|
|
panic!("isize::MAX + 1 should trigger an overflow!");
|
|
}
|
|
} else {
|
|
if let Err(AllocError { .. }) = ten_bytes.try_reserve(MAX_CAP - 9) {
|
|
} else {
|
|
panic!("isize::MAX + 1 should trigger an OOM!")
|
|
}
|
|
}
|
|
// Should always overflow in the add-to-len
|
|
if let Err(CapacityOverflow) = ten_bytes.try_reserve(MAX_USIZE) {
|
|
} else {
|
|
panic!("usize::MAX should trigger an overflow!")
|
|
}
|
|
}
|
|
|
|
{
|
|
// Same basic idea, but with interesting type size
|
|
let mut ten_u32s: Vec<u32> = vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
|
|
|
|
if let Err(CapacityOverflow) = ten_u32s.try_reserve(MAX_CAP / 4 - 10) {
|
|
panic!("isize::MAX shouldn't trigger an overflow!");
|
|
}
|
|
if let Err(CapacityOverflow) = ten_u32s.try_reserve(MAX_CAP / 4 - 10) {
|
|
panic!("isize::MAX shouldn't trigger an overflow!");
|
|
}
|
|
if guards_against_isize {
|
|
if let Err(CapacityOverflow) = ten_u32s.try_reserve(MAX_CAP / 4 - 9) {
|
|
} else {
|
|
panic!("isize::MAX + 1 should trigger an overflow!");
|
|
}
|
|
} else {
|
|
if let Err(AllocError { .. }) = ten_u32s.try_reserve(MAX_CAP / 4 - 9) {
|
|
} else {
|
|
panic!("isize::MAX + 1 should trigger an OOM!")
|
|
}
|
|
}
|
|
// Should fail in the mul-by-size
|
|
if let Err(CapacityOverflow) = ten_u32s.try_reserve(MAX_USIZE - 20) {
|
|
} else {
|
|
panic!("usize::MAX should trigger an overflow!");
|
|
}
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
#[cfg_attr(miri, ignore)] // Miri does not support signalling OOM
|
|
#[cfg_attr(target_os = "android", ignore)] // Android used in CI has a broken dlmalloc
|
|
fn test_try_reserve_exact() {
|
|
// This is exactly the same as test_try_reserve with the method changed.
|
|
// See that test for comments.
|
|
|
|
const MAX_CAP: usize = isize::MAX as usize;
|
|
const MAX_USIZE: usize = usize::MAX;
|
|
|
|
let guards_against_isize = size_of::<usize>() < 8;
|
|
|
|
{
|
|
let mut empty_bytes: Vec<u8> = Vec::new();
|
|
|
|
if let Err(CapacityOverflow) = empty_bytes.try_reserve_exact(MAX_CAP) {
|
|
panic!("isize::MAX shouldn't trigger an overflow!");
|
|
}
|
|
if let Err(CapacityOverflow) = empty_bytes.try_reserve_exact(MAX_CAP) {
|
|
panic!("isize::MAX shouldn't trigger an overflow!");
|
|
}
|
|
|
|
if guards_against_isize {
|
|
if let Err(CapacityOverflow) = empty_bytes.try_reserve_exact(MAX_CAP + 1) {
|
|
} else {
|
|
panic!("isize::MAX + 1 should trigger an overflow!")
|
|
}
|
|
|
|
if let Err(CapacityOverflow) = empty_bytes.try_reserve_exact(MAX_USIZE) {
|
|
} else {
|
|
panic!("usize::MAX should trigger an overflow!")
|
|
}
|
|
} else {
|
|
if let Err(AllocError { .. }) = empty_bytes.try_reserve_exact(MAX_CAP + 1) {
|
|
} else {
|
|
panic!("isize::MAX + 1 should trigger an OOM!")
|
|
}
|
|
|
|
if let Err(AllocError { .. }) = empty_bytes.try_reserve_exact(MAX_USIZE) {
|
|
} else {
|
|
panic!("usize::MAX should trigger an OOM!")
|
|
}
|
|
}
|
|
}
|
|
|
|
{
|
|
let mut ten_bytes: Vec<u8> = vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
|
|
|
|
if let Err(CapacityOverflow) = ten_bytes.try_reserve_exact(MAX_CAP - 10) {
|
|
panic!("isize::MAX shouldn't trigger an overflow!");
|
|
}
|
|
if let Err(CapacityOverflow) = ten_bytes.try_reserve_exact(MAX_CAP - 10) {
|
|
panic!("isize::MAX shouldn't trigger an overflow!");
|
|
}
|
|
if guards_against_isize {
|
|
if let Err(CapacityOverflow) = ten_bytes.try_reserve_exact(MAX_CAP - 9) {
|
|
} else {
|
|
panic!("isize::MAX + 1 should trigger an overflow!");
|
|
}
|
|
} else {
|
|
if let Err(AllocError { .. }) = ten_bytes.try_reserve_exact(MAX_CAP - 9) {
|
|
} else {
|
|
panic!("isize::MAX + 1 should trigger an OOM!")
|
|
}
|
|
}
|
|
if let Err(CapacityOverflow) = ten_bytes.try_reserve_exact(MAX_USIZE) {
|
|
} else {
|
|
panic!("usize::MAX should trigger an overflow!")
|
|
}
|
|
}
|
|
|
|
{
|
|
let mut ten_u32s: Vec<u32> = vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
|
|
|
|
if let Err(CapacityOverflow) = ten_u32s.try_reserve_exact(MAX_CAP / 4 - 10) {
|
|
panic!("isize::MAX shouldn't trigger an overflow!");
|
|
}
|
|
if let Err(CapacityOverflow) = ten_u32s.try_reserve_exact(MAX_CAP / 4 - 10) {
|
|
panic!("isize::MAX shouldn't trigger an overflow!");
|
|
}
|
|
if guards_against_isize {
|
|
if let Err(CapacityOverflow) = ten_u32s.try_reserve_exact(MAX_CAP / 4 - 9) {
|
|
} else {
|
|
panic!("isize::MAX + 1 should trigger an overflow!");
|
|
}
|
|
} else {
|
|
if let Err(AllocError { .. }) = ten_u32s.try_reserve_exact(MAX_CAP / 4 - 9) {
|
|
} else {
|
|
panic!("isize::MAX + 1 should trigger an OOM!")
|
|
}
|
|
}
|
|
if let Err(CapacityOverflow) = ten_u32s.try_reserve_exact(MAX_USIZE - 20) {
|
|
} else {
|
|
panic!("usize::MAX should trigger an overflow!")
|
|
}
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_stable_pointers() {
|
|
/// Pull an element from the iterator, then drop it.
|
|
/// Useful to cover both the `next` and `drop` paths of an iterator.
|
|
fn next_then_drop<I: Iterator>(mut i: I) {
|
|
i.next().unwrap();
|
|
drop(i);
|
|
}
|
|
|
|
// Test that, if we reserved enough space, adding and removing elements does not
|
|
// invalidate references into the vector (such as `v0`). This test also
|
|
// runs in Miri, which would detect such problems.
|
|
// Note that this test does *not* constitute a stable guarantee that all these functions do not
|
|
// reallocate! Only what is explicitly documented at
|
|
// <https://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#guarantees> is stably guaranteed.
|
|
let mut v = Vec::with_capacity(128);
|
|
v.push(13);
|
|
|
|
// Laundering the lifetime -- we take care that `v` does not reallocate, so that's okay.
|
|
let v0 = &mut v[0];
|
|
let v0 = unsafe { &mut *(v0 as *mut _) };
|
|
// Now do a bunch of things and occasionally use `v0` again to assert it is still valid.
|
|
|
|
// Pushing/inserting and popping/removing
|
|
v.push(1);
|
|
v.push(2);
|
|
v.insert(1, 1);
|
|
assert_eq!(*v0, 13);
|
|
v.remove(1);
|
|
v.pop().unwrap();
|
|
assert_eq!(*v0, 13);
|
|
v.push(1);
|
|
v.swap_remove(1);
|
|
assert_eq!(v.len(), 2);
|
|
v.swap_remove(1); // swap_remove the last element
|
|
assert_eq!(*v0, 13);
|
|
|
|
// Appending
|
|
v.append(&mut vec![27, 19]);
|
|
assert_eq!(*v0, 13);
|
|
|
|
// Extending
|
|
v.extend_from_slice(&[1, 2]);
|
|
v.extend(&[1, 2]); // `slice::Iter` (with `T: Copy`) specialization
|
|
v.extend(vec![2, 3]); // `vec::IntoIter` specialization
|
|
v.extend(std::iter::once(3)); // `TrustedLen` specialization
|
|
v.extend(std::iter::empty::<i32>()); // `TrustedLen` specialization with empty iterator
|
|
v.extend(std::iter::once(3).filter(|_| true)); // base case
|
|
v.extend(std::iter::once(&3)); // `cloned` specialization
|
|
assert_eq!(*v0, 13);
|
|
|
|
// Truncation
|
|
v.truncate(2);
|
|
assert_eq!(*v0, 13);
|
|
|
|
// Resizing
|
|
v.resize_with(v.len() + 10, || 42);
|
|
assert_eq!(*v0, 13);
|
|
v.resize_with(2, || panic!());
|
|
assert_eq!(*v0, 13);
|
|
|
|
// No-op reservation
|
|
v.reserve(32);
|
|
v.reserve_exact(32);
|
|
assert_eq!(*v0, 13);
|
|
|
|
// Partial draining
|
|
v.resize_with(10, || 42);
|
|
next_then_drop(v.drain(5..));
|
|
assert_eq!(*v0, 13);
|
|
|
|
// Splicing
|
|
v.resize_with(10, || 42);
|
|
next_then_drop(v.splice(5.., vec![1, 2, 3, 4, 5])); // empty tail after range
|
|
assert_eq!(*v0, 13);
|
|
next_then_drop(v.splice(5..8, vec![1])); // replacement is smaller than original range
|
|
assert_eq!(*v0, 13);
|
|
next_then_drop(v.splice(5..6, vec![1; 10].into_iter().filter(|_| true))); // lower bound not exact
|
|
assert_eq!(*v0, 13);
|
|
|
|
// Smoke test that would fire even outside Miri if an actual relocation happened.
|
|
*v0 -= 13;
|
|
assert_eq!(v[0], 0);
|
|
}
|
|
|
|
// https://github.com/rust-lang/rust/pull/49496 introduced specialization based on:
|
|
//
|
|
// ```
|
|
// unsafe impl<T: ?Sized> IsZero for *mut T {
|
|
// fn is_zero(&self) -> bool {
|
|
// (*self).is_null()
|
|
// }
|
|
// }
|
|
// ```
|
|
//
|
|
// … to call `RawVec::with_capacity_zeroed` for creating `Vec<*mut T>`,
|
|
// which is incorrect for fat pointers since `<*mut T>::is_null` only looks at the data component.
|
|
// That is, a fat pointer can be “null” without being made entirely of zero bits.
|
|
#[test]
|
|
fn vec_macro_repeating_null_raw_fat_pointer() {
|
|
let raw_dyn = &mut (|| ()) as &mut dyn Fn() as *mut dyn Fn();
|
|
let vtable = dbg!(ptr_metadata(raw_dyn));
|
|
let null_raw_dyn = ptr_from_raw_parts(std::ptr::null_mut(), vtable);
|
|
assert!(null_raw_dyn.is_null());
|
|
|
|
let vec = vec![null_raw_dyn; 1];
|
|
dbg!(ptr_metadata(vec[0]));
|
|
assert!(vec[0] == null_raw_dyn);
|
|
|
|
// Polyfill for https://github.com/rust-lang/rfcs/pull/2580
|
|
|
|
fn ptr_metadata(ptr: *mut dyn Fn()) -> *mut () {
|
|
unsafe { std::mem::transmute::<*mut dyn Fn(), DynRepr>(ptr).vtable }
|
|
}
|
|
|
|
fn ptr_from_raw_parts(data: *mut (), vtable: *mut ()) -> *mut dyn Fn() {
|
|
unsafe { std::mem::transmute::<DynRepr, *mut dyn Fn()>(DynRepr { data, vtable }) }
|
|
}
|
|
|
|
#[repr(C)]
|
|
struct DynRepr {
|
|
data: *mut (),
|
|
vtable: *mut (),
|
|
}
|
|
}
|
|
|
|
// This test will likely fail if you change the capacities used in
|
|
// `RawVec::grow_amortized`.
|
|
#[test]
|
|
fn test_push_growth_strategy() {
|
|
// If the element size is 1, we jump from 0 to 8, then double.
|
|
{
|
|
let mut v1: Vec<u8> = vec![];
|
|
assert_eq!(v1.capacity(), 0);
|
|
|
|
for _ in 0..8 {
|
|
v1.push(0);
|
|
assert_eq!(v1.capacity(), 8);
|
|
}
|
|
|
|
for _ in 8..16 {
|
|
v1.push(0);
|
|
assert_eq!(v1.capacity(), 16);
|
|
}
|
|
|
|
for _ in 16..32 {
|
|
v1.push(0);
|
|
assert_eq!(v1.capacity(), 32);
|
|
}
|
|
|
|
for _ in 32..64 {
|
|
v1.push(0);
|
|
assert_eq!(v1.capacity(), 64);
|
|
}
|
|
}
|
|
|
|
// If the element size is 2..=1024, we jump from 0 to 4, then double.
|
|
{
|
|
let mut v2: Vec<u16> = vec![];
|
|
let mut v1024: Vec<[u8; 1024]> = vec![];
|
|
assert_eq!(v2.capacity(), 0);
|
|
assert_eq!(v1024.capacity(), 0);
|
|
|
|
for _ in 0..4 {
|
|
v2.push(0);
|
|
v1024.push([0; 1024]);
|
|
assert_eq!(v2.capacity(), 4);
|
|
assert_eq!(v1024.capacity(), 4);
|
|
}
|
|
|
|
for _ in 4..8 {
|
|
v2.push(0);
|
|
v1024.push([0; 1024]);
|
|
assert_eq!(v2.capacity(), 8);
|
|
assert_eq!(v1024.capacity(), 8);
|
|
}
|
|
|
|
for _ in 8..16 {
|
|
v2.push(0);
|
|
v1024.push([0; 1024]);
|
|
assert_eq!(v2.capacity(), 16);
|
|
assert_eq!(v1024.capacity(), 16);
|
|
}
|
|
|
|
for _ in 16..32 {
|
|
v2.push(0);
|
|
v1024.push([0; 1024]);
|
|
assert_eq!(v2.capacity(), 32);
|
|
assert_eq!(v1024.capacity(), 32);
|
|
}
|
|
|
|
for _ in 32..64 {
|
|
v2.push(0);
|
|
v1024.push([0; 1024]);
|
|
assert_eq!(v2.capacity(), 64);
|
|
assert_eq!(v1024.capacity(), 64);
|
|
}
|
|
}
|
|
|
|
// If the element size is > 1024, we jump from 0 to 1, then double.
|
|
{
|
|
let mut v1025: Vec<[u8; 1025]> = vec![];
|
|
assert_eq!(v1025.capacity(), 0);
|
|
|
|
for _ in 0..1 {
|
|
v1025.push([0; 1025]);
|
|
assert_eq!(v1025.capacity(), 1);
|
|
}
|
|
|
|
for _ in 1..2 {
|
|
v1025.push([0; 1025]);
|
|
assert_eq!(v1025.capacity(), 2);
|
|
}
|
|
|
|
for _ in 2..4 {
|
|
v1025.push([0; 1025]);
|
|
assert_eq!(v1025.capacity(), 4);
|
|
}
|
|
|
|
for _ in 4..8 {
|
|
v1025.push([0; 1025]);
|
|
assert_eq!(v1025.capacity(), 8);
|
|
}
|
|
|
|
for _ in 8..16 {
|
|
v1025.push([0; 1025]);
|
|
assert_eq!(v1025.capacity(), 16);
|
|
}
|
|
|
|
for _ in 16..32 {
|
|
v1025.push([0; 1025]);
|
|
assert_eq!(v1025.capacity(), 32);
|
|
}
|
|
|
|
for _ in 32..64 {
|
|
v1025.push([0; 1025]);
|
|
assert_eq!(v1025.capacity(), 64);
|
|
}
|
|
}
|
|
}
|
|
|
|
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:expr, $a3:expr; $b2:expr, $b3: expr) => {
|
|
assert!($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);
|
|
assert_partial_eq_valid!(vec2,vec3; arrayref2[..],arrayref3[..]);
|
|
}
|
|
|
|
#[test]
|
|
fn test_vec_cycle() {
|
|
#[derive(Debug)]
|
|
struct C<'a> {
|
|
v: Vec<Cell<Option<&'a C<'a>>>>,
|
|
}
|
|
|
|
impl<'a> C<'a> {
|
|
fn new() -> C<'a> {
|
|
C { v: Vec::new() }
|
|
}
|
|
}
|
|
|
|
let mut c1 = C::new();
|
|
let mut c2 = C::new();
|
|
let mut c3 = C::new();
|
|
|
|
// Push
|
|
c1.v.push(Cell::new(None));
|
|
c1.v.push(Cell::new(None));
|
|
|
|
c2.v.push(Cell::new(None));
|
|
c2.v.push(Cell::new(None));
|
|
|
|
c3.v.push(Cell::new(None));
|
|
c3.v.push(Cell::new(None));
|
|
|
|
// Set
|
|
c1.v[0].set(Some(&c2));
|
|
c1.v[1].set(Some(&c3));
|
|
|
|
c2.v[0].set(Some(&c2));
|
|
c2.v[1].set(Some(&c3));
|
|
|
|
c3.v[0].set(Some(&c1));
|
|
c3.v[1].set(Some(&c2));
|
|
}
|
|
|
|
#[test]
|
|
fn test_vec_cycle_wrapped() {
|
|
struct Refs<'a> {
|
|
v: Vec<Cell<Option<&'a C<'a>>>>,
|
|
}
|
|
|
|
struct C<'a> {
|
|
refs: Refs<'a>,
|
|
}
|
|
|
|
impl<'a> Refs<'a> {
|
|
fn new() -> Refs<'a> {
|
|
Refs { v: Vec::new() }
|
|
}
|
|
}
|
|
|
|
impl<'a> C<'a> {
|
|
fn new() -> C<'a> {
|
|
C { refs: Refs::new() }
|
|
}
|
|
}
|
|
|
|
let mut c1 = C::new();
|
|
let mut c2 = C::new();
|
|
let mut c3 = C::new();
|
|
|
|
c1.refs.v.push(Cell::new(None));
|
|
c1.refs.v.push(Cell::new(None));
|
|
c2.refs.v.push(Cell::new(None));
|
|
c2.refs.v.push(Cell::new(None));
|
|
c3.refs.v.push(Cell::new(None));
|
|
c3.refs.v.push(Cell::new(None));
|
|
|
|
c1.refs.v[0].set(Some(&c2));
|
|
c1.refs.v[1].set(Some(&c3));
|
|
c2.refs.v[0].set(Some(&c2));
|
|
c2.refs.v[1].set(Some(&c3));
|
|
c3.refs.v[0].set(Some(&c1));
|
|
c3.refs.v[1].set(Some(&c2));
|
|
}
|