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-rw-r--r--compiler/rustc_data_structures/src/owning_ref/tests.rs711
1 files changed, 0 insertions, 711 deletions
diff --git a/compiler/rustc_data_structures/src/owning_ref/tests.rs b/compiler/rustc_data_structures/src/owning_ref/tests.rs
deleted file mode 100644
index a9b187c4c..000000000
--- a/compiler/rustc_data_structures/src/owning_ref/tests.rs
+++ /dev/null
@@ -1,711 +0,0 @@
-// FIXME: owning_ref is not sound under stacked borrows. Preferably, get rid of it.
-#[cfg(not(miri))]
-mod owning_ref {
- use super::super::OwningRef;
- use super::super::{BoxRef, Erased, ErasedBoxRef, RcRef};
- use std::cmp::Ordering;
- use std::collections::hash_map::DefaultHasher;
- use std::collections::HashMap;
- use std::hash::{Hash, Hasher};
- use std::rc::Rc;
-
- #[derive(Debug, PartialEq)]
- struct Example(u32, String, [u8; 3]);
- fn example() -> Example {
- Example(42, "hello world".to_string(), [1, 2, 3])
- }
-
- #[test]
- fn new_deref() {
- let or: OwningRef<Box<()>, ()> = OwningRef::new(Box::new(()));
- assert_eq!(&*or, &());
- }
-
- #[test]
- fn into() {
- let or: OwningRef<Box<()>, ()> = Box::new(()).into();
- assert_eq!(&*or, &());
- }
-
- #[test]
- fn map_offset_ref() {
- let or: BoxRef<Example> = Box::new(example()).into();
- let or: BoxRef<_, u32> = or.map(|x| &x.0);
- assert_eq!(&*or, &42);
-
- let or: BoxRef<Example> = Box::new(example()).into();
- let or: BoxRef<_, u8> = or.map(|x| &x.2[1]);
- assert_eq!(&*or, &2);
- }
-
- #[test]
- fn map_heap_ref() {
- let or: BoxRef<Example> = Box::new(example()).into();
- let or: BoxRef<_, str> = or.map(|x| &x.1[..5]);
- assert_eq!(&*or, "hello");
- }
-
- #[test]
- fn map_static_ref() {
- let or: BoxRef<()> = Box::new(()).into();
- let or: BoxRef<_, str> = or.map(|_| "hello");
- assert_eq!(&*or, "hello");
- }
-
- #[test]
- fn map_chained() {
- let or: BoxRef<String> = Box::new(example().1).into();
- let or: BoxRef<_, str> = or.map(|x| &x[1..5]);
- let or: BoxRef<_, str> = or.map(|x| &x[..2]);
- assert_eq!(&*or, "el");
- }
-
- #[test]
- fn map_chained_inference() {
- let or = BoxRef::new(Box::new(example().1)).map(|x| &x[..5]).map(|x| &x[1..3]);
- assert_eq!(&*or, "el");
- }
-
- #[test]
- fn owner() {
- let or: BoxRef<String> = Box::new(example().1).into();
- let or = or.map(|x| &x[..5]);
- assert_eq!(&*or, "hello");
- assert_eq!(&**or.owner(), "hello world");
- }
-
- #[test]
- fn into_inner() {
- let or: BoxRef<String> = Box::new(example().1).into();
- let or = or.map(|x| &x[..5]);
- assert_eq!(&*or, "hello");
- let s = *or.into_inner();
- assert_eq!(&s, "hello world");
- }
-
- #[test]
- fn fmt_debug() {
- let or: BoxRef<String> = Box::new(example().1).into();
- let or = or.map(|x| &x[..5]);
- let s = format!("{:?}", or);
- assert_eq!(&s, "OwningRef { owner: \"hello world\", reference: \"hello\" }");
- }
-
- #[test]
- fn erased_owner() {
- let o1: BoxRef<Example, str> = BoxRef::new(Box::new(example())).map(|x| &x.1[..]);
-
- let o2: BoxRef<String, str> = BoxRef::new(Box::new(example().1)).map(|x| &x[..]);
-
- let os: Vec<ErasedBoxRef<str>> = vec![o1.erase_owner(), o2.erase_owner()];
- assert!(os.iter().all(|e| &e[..] == "hello world"));
- }
-
- #[test]
- fn raii_locks() {
- use super::super::{MutexGuardRef, RwLockReadGuardRef, RwLockWriteGuardRef};
- use super::super::{RefMutRef, RefRef};
- use std::cell::RefCell;
- use std::sync::{Mutex, RwLock};
-
- {
- let a = RefCell::new(1);
- let a = {
- let a = RefRef::new(a.borrow());
- assert_eq!(*a, 1);
- a
- };
- assert_eq!(*a, 1);
- drop(a);
- }
- {
- let a = RefCell::new(1);
- let a = {
- let a = RefMutRef::new(a.borrow_mut());
- assert_eq!(*a, 1);
- a
- };
- assert_eq!(*a, 1);
- drop(a);
- }
- {
- let a = Mutex::new(1);
- let a = {
- let a = MutexGuardRef::new(a.lock().unwrap());
- assert_eq!(*a, 1);
- a
- };
- assert_eq!(*a, 1);
- drop(a);
- }
- {
- let a = RwLock::new(1);
- let a = {
- let a = RwLockReadGuardRef::new(a.read().unwrap());
- assert_eq!(*a, 1);
- a
- };
- assert_eq!(*a, 1);
- drop(a);
- }
- {
- let a = RwLock::new(1);
- let a = {
- let a = RwLockWriteGuardRef::new(a.write().unwrap());
- assert_eq!(*a, 1);
- a
- };
- assert_eq!(*a, 1);
- drop(a);
- }
- }
-
- #[test]
- fn eq() {
- let or1: BoxRef<[u8]> = BoxRef::new(vec![1, 2, 3].into_boxed_slice());
- let or2: BoxRef<[u8]> = BoxRef::new(vec![1, 2, 3].into_boxed_slice());
- assert_eq!(or1.eq(&or2), true);
- }
-
- #[test]
- fn cmp() {
- let or1: BoxRef<[u8]> = BoxRef::new(vec![1, 2, 3].into_boxed_slice());
- let or2: BoxRef<[u8]> = BoxRef::new(vec![4, 5, 6].into_boxed_slice());
- assert_eq!(or1.cmp(&or2), Ordering::Less);
- }
-
- #[test]
- fn partial_cmp() {
- let or1: BoxRef<[u8]> = BoxRef::new(vec![4, 5, 6].into_boxed_slice());
- let or2: BoxRef<[u8]> = BoxRef::new(vec![1, 2, 3].into_boxed_slice());
- assert_eq!(or1.partial_cmp(&or2), Some(Ordering::Greater));
- }
-
- #[test]
- fn hash() {
- let mut h1 = DefaultHasher::new();
- let mut h2 = DefaultHasher::new();
-
- let or1: BoxRef<[u8]> = BoxRef::new(vec![1, 2, 3].into_boxed_slice());
- let or2: BoxRef<[u8]> = BoxRef::new(vec![1, 2, 3].into_boxed_slice());
-
- or1.hash(&mut h1);
- or2.hash(&mut h2);
-
- assert_eq!(h1.finish(), h2.finish());
- }
-
- #[test]
- fn borrow() {
- let mut hash = HashMap::new();
- let key = RcRef::<String>::new(Rc::new("foo-bar".to_string())).map(|s| &s[..]);
-
- hash.insert(key.clone().map(|s| &s[..3]), 42);
- hash.insert(key.clone().map(|s| &s[4..]), 23);
-
- assert_eq!(hash.get("foo"), Some(&42));
- assert_eq!(hash.get("bar"), Some(&23));
- }
-
- #[test]
- fn total_erase() {
- let a: OwningRef<Vec<u8>, [u8]> = OwningRef::new(vec![]).map(|x| &x[..]);
- let b: OwningRef<Box<[u8]>, [u8]> =
- OwningRef::new(vec![].into_boxed_slice()).map(|x| &x[..]);
-
- let c: OwningRef<Rc<Vec<u8>>, [u8]> = unsafe { a.map_owner(Rc::new) };
- let d: OwningRef<Rc<Box<[u8]>>, [u8]> = unsafe { b.map_owner(Rc::new) };
-
- let e: OwningRef<Rc<dyn Erased>, [u8]> = c.erase_owner();
- let f: OwningRef<Rc<dyn Erased>, [u8]> = d.erase_owner();
-
- let _g = e.clone();
- let _h = f.clone();
- }
-
- #[test]
- fn total_erase_box() {
- let a: OwningRef<Vec<u8>, [u8]> = OwningRef::new(vec![]).map(|x| &x[..]);
- let b: OwningRef<Box<[u8]>, [u8]> =
- OwningRef::new(vec![].into_boxed_slice()).map(|x| &x[..]);
-
- let c: OwningRef<Box<Vec<u8>>, [u8]> = a.map_owner_box();
- let d: OwningRef<Box<Box<[u8]>>, [u8]> = b.map_owner_box();
-
- let _e: OwningRef<Box<dyn Erased>, [u8]> = c.erase_owner();
- let _f: OwningRef<Box<dyn Erased>, [u8]> = d.erase_owner();
- }
-
- #[test]
- fn try_map1() {
- use std::any::Any;
-
- let x = Box::new(123_i32);
- let y: Box<dyn Any> = x;
-
- assert!(OwningRef::new(y).try_map(|x| x.downcast_ref::<i32>().ok_or(())).is_ok());
- }
-
- #[test]
- fn try_map2() {
- use std::any::Any;
-
- let x = Box::new(123_i32);
- let y: Box<dyn Any> = x;
-
- assert!(!OwningRef::new(y).try_map(|x| x.downcast_ref::<i32>().ok_or(())).is_err());
- }
-}
-
-mod owning_handle {
- use super::super::OwningHandle;
- use super::super::RcRef;
- use std::cell::RefCell;
- use std::rc::Rc;
- use std::sync::Arc;
- use std::sync::RwLock;
-
- #[test]
- fn owning_handle() {
- use std::cell::RefCell;
- let cell = Rc::new(RefCell::new(2));
- let cell_ref = RcRef::new(cell);
- let mut handle =
- OwningHandle::new_with_fn(cell_ref, |x| unsafe { x.as_ref() }.unwrap().borrow_mut());
- assert_eq!(*handle, 2);
- *handle = 3;
- assert_eq!(*handle, 3);
- }
-
- #[test]
- fn try_owning_handle_ok() {
- use std::cell::RefCell;
- let cell = Rc::new(RefCell::new(2));
- let cell_ref = RcRef::new(cell);
- let mut handle = OwningHandle::try_new::<_, ()>(cell_ref, |x| {
- Ok(unsafe { x.as_ref() }.unwrap().borrow_mut())
- })
- .unwrap();
- assert_eq!(*handle, 2);
- *handle = 3;
- assert_eq!(*handle, 3);
- }
-
- #[test]
- fn try_owning_handle_err() {
- use std::cell::RefCell;
- let cell = Rc::new(RefCell::new(2));
- let cell_ref = RcRef::new(cell);
- let handle = OwningHandle::try_new::<_, ()>(cell_ref, |x| {
- if false {
- return Ok(unsafe { x.as_ref() }.unwrap().borrow_mut());
- }
- Err(())
- });
- assert!(handle.is_err());
- }
-
- #[test]
- fn nested() {
- use std::cell::RefCell;
- use std::sync::{Arc, RwLock};
-
- let result = {
- let complex = Rc::new(RefCell::new(Arc::new(RwLock::new("someString"))));
- let curr = RcRef::new(complex);
- let curr =
- OwningHandle::new_with_fn(curr, |x| unsafe { x.as_ref() }.unwrap().borrow_mut());
- let mut curr = OwningHandle::new_with_fn(curr, |x| {
- unsafe { x.as_ref() }.unwrap().try_write().unwrap()
- });
- assert_eq!(*curr, "someString");
- *curr = "someOtherString";
- curr
- };
- assert_eq!(*result, "someOtherString");
- }
-
- #[test]
- fn owning_handle_safe() {
- use std::cell::RefCell;
- let cell = Rc::new(RefCell::new(2));
- let cell_ref = RcRef::new(cell);
- let handle = OwningHandle::new(cell_ref);
- assert_eq!(*handle, 2);
- }
-
- #[test]
- fn owning_handle_mut_safe() {
- use std::cell::RefCell;
- let cell = Rc::new(RefCell::new(2));
- let cell_ref = RcRef::new(cell);
- let mut handle = OwningHandle::new_mut(cell_ref);
- assert_eq!(*handle, 2);
- *handle = 3;
- assert_eq!(*handle, 3);
- }
-
- #[test]
- fn owning_handle_safe_2() {
- let result = {
- let complex = Rc::new(RefCell::new(Arc::new(RwLock::new("someString"))));
- let curr = RcRef::new(complex);
- let curr =
- OwningHandle::new_with_fn(curr, |x| unsafe { x.as_ref() }.unwrap().borrow_mut());
- let mut curr = OwningHandle::new_with_fn(curr, |x| {
- unsafe { x.as_ref() }.unwrap().try_write().unwrap()
- });
- assert_eq!(*curr, "someString");
- *curr = "someOtherString";
- curr
- };
- assert_eq!(*result, "someOtherString");
- }
-}
-
-// FIXME: owning_ref is not sound under stacked borrows. Preferably, get rid of it.
-#[cfg(not(miri))]
-mod owning_ref_mut {
- use super::super::BoxRef;
- use super::super::{BoxRefMut, Erased, ErasedBoxRefMut, OwningRefMut};
- use std::cmp::Ordering;
- use std::collections::hash_map::DefaultHasher;
- use std::collections::HashMap;
- use std::hash::{Hash, Hasher};
-
- #[derive(Debug, PartialEq)]
- struct Example(u32, String, [u8; 3]);
- fn example() -> Example {
- Example(42, "hello world".to_string(), [1, 2, 3])
- }
-
- #[test]
- fn new_deref() {
- let or: OwningRefMut<Box<()>, ()> = OwningRefMut::new(Box::new(()));
- assert_eq!(&*or, &());
- }
-
- #[test]
- fn new_deref_mut() {
- let mut or: OwningRefMut<Box<()>, ()> = OwningRefMut::new(Box::new(()));
- assert_eq!(&mut *or, &mut ());
- }
-
- #[test]
- fn mutate() {
- let mut or: OwningRefMut<Box<usize>, usize> = OwningRefMut::new(Box::new(0));
- assert_eq!(&*or, &0);
- *or = 1;
- assert_eq!(&*or, &1);
- }
-
- #[test]
- fn into() {
- let or: OwningRefMut<Box<()>, ()> = Box::new(()).into();
- assert_eq!(&*or, &());
- }
-
- #[test]
- fn map_offset_ref() {
- let or: BoxRefMut<Example> = Box::new(example()).into();
- let or: BoxRef<_, u32> = or.map(|x| &mut x.0);
- assert_eq!(&*or, &42);
-
- let or: BoxRefMut<Example> = Box::new(example()).into();
- let or: BoxRef<_, u8> = or.map(|x| &mut x.2[1]);
- assert_eq!(&*or, &2);
- }
-
- #[test]
- fn map_heap_ref() {
- let or: BoxRefMut<Example> = Box::new(example()).into();
- let or: BoxRef<_, str> = or.map(|x| &mut x.1[..5]);
- assert_eq!(&*or, "hello");
- }
-
- #[test]
- fn map_static_ref() {
- let or: BoxRefMut<()> = Box::new(()).into();
- let or: BoxRef<_, str> = or.map(|_| "hello");
- assert_eq!(&*or, "hello");
- }
-
- #[test]
- fn map_mut_offset_ref() {
- let or: BoxRefMut<Example> = Box::new(example()).into();
- let or: BoxRefMut<_, u32> = or.map_mut(|x| &mut x.0);
- assert_eq!(&*or, &42);
-
- let or: BoxRefMut<Example> = Box::new(example()).into();
- let or: BoxRefMut<_, u8> = or.map_mut(|x| &mut x.2[1]);
- assert_eq!(&*or, &2);
- }
-
- #[test]
- fn map_mut_heap_ref() {
- let or: BoxRefMut<Example> = Box::new(example()).into();
- let or: BoxRefMut<_, str> = or.map_mut(|x| &mut x.1[..5]);
- assert_eq!(&*or, "hello");
- }
-
- #[test]
- fn map_mut_static_ref() {
- static mut MUT_S: [u8; 5] = *b"hello";
-
- let mut_s: &'static mut [u8] = unsafe { &mut MUT_S };
-
- let or: BoxRefMut<()> = Box::new(()).into();
- let or: BoxRefMut<_, [u8]> = or.map_mut(move |_| mut_s);
- assert_eq!(&*or, b"hello");
- }
-
- #[test]
- fn map_mut_chained() {
- let or: BoxRefMut<String> = Box::new(example().1).into();
- let or: BoxRefMut<_, str> = or.map_mut(|x| &mut x[1..5]);
- let or: BoxRefMut<_, str> = or.map_mut(|x| &mut x[..2]);
- assert_eq!(&*or, "el");
- }
-
- #[test]
- fn map_chained_inference() {
- let or = BoxRefMut::new(Box::new(example().1))
- .map_mut(|x| &mut x[..5])
- .map_mut(|x| &mut x[1..3]);
- assert_eq!(&*or, "el");
- }
-
- #[test]
- fn try_map_mut() {
- let or: BoxRefMut<String> = Box::new(example().1).into();
- let or: Result<BoxRefMut<_, str>, ()> = or.try_map_mut(|x| Ok(&mut x[1..5]));
- assert_eq!(&*or.unwrap(), "ello");
-
- let or: BoxRefMut<String> = Box::new(example().1).into();
- let or: Result<BoxRefMut<_, str>, ()> = or.try_map_mut(|_| Err(()));
- assert!(or.is_err());
- }
-
- #[test]
- fn owner() {
- let or: BoxRefMut<String> = Box::new(example().1).into();
- let or = or.map_mut(|x| &mut x[..5]);
- assert_eq!(&*or, "hello");
- assert_eq!(&**or.owner(), "hello world");
- }
-
- #[test]
- fn into_inner() {
- let or: BoxRefMut<String> = Box::new(example().1).into();
- let or = or.map_mut(|x| &mut x[..5]);
- assert_eq!(&*or, "hello");
- let s = *or.into_inner();
- assert_eq!(&s, "hello world");
- }
-
- #[test]
- fn fmt_debug() {
- let or: BoxRefMut<String> = Box::new(example().1).into();
- let or = or.map_mut(|x| &mut x[..5]);
- let s = format!("{:?}", or);
- assert_eq!(&s, "OwningRefMut { owner: \"hello world\", reference: \"hello\" }");
- }
-
- #[test]
- fn erased_owner() {
- let o1: BoxRefMut<Example, str> =
- BoxRefMut::new(Box::new(example())).map_mut(|x| &mut x.1[..]);
-
- let o2: BoxRefMut<String, str> =
- BoxRefMut::new(Box::new(example().1)).map_mut(|x| &mut x[..]);
-
- let os: Vec<ErasedBoxRefMut<str>> = vec![o1.erase_owner(), o2.erase_owner()];
- assert!(os.iter().all(|e| &e[..] == "hello world"));
- }
-
- #[test]
- fn raii_locks() {
- use super::super::RefMutRefMut;
- use super::super::{MutexGuardRefMut, RwLockWriteGuardRefMut};
- use std::cell::RefCell;
- use std::sync::{Mutex, RwLock};
-
- {
- let a = RefCell::new(1);
- let a = {
- let a = RefMutRefMut::new(a.borrow_mut());
- assert_eq!(*a, 1);
- a
- };
- assert_eq!(*a, 1);
- drop(a);
- }
- {
- let a = Mutex::new(1);
- let a = {
- let a = MutexGuardRefMut::new(a.lock().unwrap());
- assert_eq!(*a, 1);
- a
- };
- assert_eq!(*a, 1);
- drop(a);
- }
- {
- let a = RwLock::new(1);
- let a = {
- let a = RwLockWriteGuardRefMut::new(a.write().unwrap());
- assert_eq!(*a, 1);
- a
- };
- assert_eq!(*a, 1);
- drop(a);
- }
- }
-
- #[test]
- fn eq() {
- let or1: BoxRefMut<[u8]> = BoxRefMut::new(vec![1, 2, 3].into_boxed_slice());
- let or2: BoxRefMut<[u8]> = BoxRefMut::new(vec![1, 2, 3].into_boxed_slice());
- assert_eq!(or1.eq(&or2), true);
- }
-
- #[test]
- fn cmp() {
- let or1: BoxRefMut<[u8]> = BoxRefMut::new(vec![1, 2, 3].into_boxed_slice());
- let or2: BoxRefMut<[u8]> = BoxRefMut::new(vec![4, 5, 6].into_boxed_slice());
- assert_eq!(or1.cmp(&or2), Ordering::Less);
- }
-
- #[test]
- fn partial_cmp() {
- let or1: BoxRefMut<[u8]> = BoxRefMut::new(vec![4, 5, 6].into_boxed_slice());
- let or2: BoxRefMut<[u8]> = BoxRefMut::new(vec![1, 2, 3].into_boxed_slice());
- assert_eq!(or1.partial_cmp(&or2), Some(Ordering::Greater));
- }
-
- #[test]
- fn hash() {
- let mut h1 = DefaultHasher::new();
- let mut h2 = DefaultHasher::new();
-
- let or1: BoxRefMut<[u8]> = BoxRefMut::new(vec![1, 2, 3].into_boxed_slice());
- let or2: BoxRefMut<[u8]> = BoxRefMut::new(vec![1, 2, 3].into_boxed_slice());
-
- or1.hash(&mut h1);
- or2.hash(&mut h2);
-
- assert_eq!(h1.finish(), h2.finish());
- }
-
- #[test]
- fn borrow() {
- let mut hash = HashMap::new();
- let key1 = BoxRefMut::<String>::new(Box::new("foo".to_string())).map(|s| &s[..]);
- let key2 = BoxRefMut::<String>::new(Box::new("bar".to_string())).map(|s| &s[..]);
-
- hash.insert(key1, 42);
- hash.insert(key2, 23);
-
- assert_eq!(hash.get("foo"), Some(&42));
- assert_eq!(hash.get("bar"), Some(&23));
- }
-
- #[test]
- fn total_erase() {
- let a: OwningRefMut<Vec<u8>, [u8]> = OwningRefMut::new(vec![]).map_mut(|x| &mut x[..]);
- let b: OwningRefMut<Box<[u8]>, [u8]> =
- OwningRefMut::new(vec![].into_boxed_slice()).map_mut(|x| &mut x[..]);
-
- let c: OwningRefMut<Box<Vec<u8>>, [u8]> = unsafe { a.map_owner(Box::new) };
- let d: OwningRefMut<Box<Box<[u8]>>, [u8]> = unsafe { b.map_owner(Box::new) };
-
- let _e: OwningRefMut<Box<dyn Erased>, [u8]> = c.erase_owner();
- let _f: OwningRefMut<Box<dyn Erased>, [u8]> = d.erase_owner();
- }
-
- #[test]
- fn total_erase_box() {
- let a: OwningRefMut<Vec<u8>, [u8]> = OwningRefMut::new(vec![]).map_mut(|x| &mut x[..]);
- let b: OwningRefMut<Box<[u8]>, [u8]> =
- OwningRefMut::new(vec![].into_boxed_slice()).map_mut(|x| &mut x[..]);
-
- let c: OwningRefMut<Box<Vec<u8>>, [u8]> = a.map_owner_box();
- let d: OwningRefMut<Box<Box<[u8]>>, [u8]> = b.map_owner_box();
-
- let _e: OwningRefMut<Box<dyn Erased>, [u8]> = c.erase_owner();
- let _f: OwningRefMut<Box<dyn Erased>, [u8]> = d.erase_owner();
- }
-
- #[test]
- fn try_map1() {
- use std::any::Any;
-
- let x = Box::new(123_i32);
- let y: Box<dyn Any> = x;
-
- assert!(OwningRefMut::new(y).try_map_mut(|x| x.downcast_mut::<i32>().ok_or(())).is_ok());
- }
-
- #[test]
- fn try_map2() {
- use std::any::Any;
-
- let x = Box::new(123_i32);
- let y: Box<dyn Any> = x;
-
- assert!(!OwningRefMut::new(y).try_map_mut(|x| x.downcast_mut::<i32>().ok_or(())).is_err());
- }
-
- #[test]
- fn try_map3() {
- use std::any::Any;
-
- let x = Box::new(123_i32);
- let y: Box<dyn Any> = x;
-
- assert!(OwningRefMut::new(y).try_map(|x| x.downcast_ref::<i32>().ok_or(())).is_ok());
- }
-
- #[test]
- fn try_map4() {
- use std::any::Any;
-
- let x = Box::new(123_i32);
- let y: Box<dyn Any> = x;
-
- assert!(!OwningRefMut::new(y).try_map(|x| x.downcast_ref::<i32>().ok_or(())).is_err());
- }
-
- #[test]
- fn into_owning_ref() {
- use super::super::BoxRef;
-
- let or: BoxRefMut<()> = Box::new(()).into();
- let or: BoxRef<()> = or.into();
- assert_eq!(&*or, &());
- }
-
- struct Foo {
- u: u32,
- }
- struct Bar {
- f: Foo,
- }
-
- #[test]
- fn ref_mut() {
- use std::cell::RefCell;
-
- let a = RefCell::new(Bar { f: Foo { u: 42 } });
- let mut b = OwningRefMut::new(a.borrow_mut());
- assert_eq!(b.f.u, 42);
- b.f.u = 43;
- let mut c = b.map_mut(|x| &mut x.f);
- assert_eq!(c.u, 43);
- c.u = 44;
- let mut d = c.map_mut(|x| &mut x.u);
- assert_eq!(*d, 44);
- *d = 45;
- assert_eq!(*d, 45);
- }
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-25 06:49:12 +0000