docs: Use String in Rc::into_raw examples

src/liballoc/rc.rs

@@ -375,9 +375,9 @@ impl<T: ?Sized> Rc<T> {
     /// ```
     /// use std::rc::Rc;
     ///
-    /// let x = Rc::new(10);
+    /// let x = Rc::new("hello".to_owned());
     /// let x_ptr = Rc::into_raw(x);
-    /// assert_eq!(unsafe { *x_ptr }, 10);
+    /// assert_eq!(unsafe { &*x_ptr }, "hello");
     /// ```
     #[stable(feature = "rc_raw", since = "1.17.0")]
     pub fn into_raw(this: Self) -> *const T {
@@ -401,13 +401,13 @@ impl<T: ?Sized> Rc<T> {
     /// ```
     /// use std::rc::Rc;
     ///
-    /// let x = Rc::new(10);
+    /// let x = Rc::new("hello".to_owned());
     /// let x_ptr = Rc::into_raw(x);
     ///
     /// unsafe {
     ///     // Convert back to an `Rc` to prevent leak.
     ///     let x = Rc::from_raw(x_ptr);
-    ///     assert_eq!(*x, 10);
+    ///     assert_eq!(&*x, "hello");
     ///
     ///     // Further calls to `Rc::from_raw(x_ptr)` would be memory unsafe.
     /// }
@@ -437,10 +437,10 @@ impl<T: ?Sized> Rc<T> {
     ///
     /// use std::rc::Rc;
     ///
-    /// let x = Rc::new(10);
+    /// let x = Rc::new("hello".to_owned());
     /// let ptr = Rc::into_raw_non_null(x);
-    /// let deref = unsafe { *ptr.as_ref() };
-    /// assert_eq!(deref, 10);
+    /// let deref = unsafe { ptr.as_ref() };
+    /// assert_eq!(deref, "hello");
     /// ```
     #[unstable(feature = "rc_into_raw_non_null", issue = "47336")]
     #[inline]
@@ -1274,17 +1274,17 @@ impl<T> Weak<T> {
     /// use std::rc::{Rc, Weak};
     /// use std::ptr;
     ///
-    /// let strong = Rc::new(42);
+    /// let strong = Rc::new("hello".to_owned());
     /// let weak = Rc::downgrade(&strong);
     /// // Both point to the same object
     /// assert!(ptr::eq(&*strong, Weak::as_raw(&weak)));
     /// // The strong here keeps it alive, so we can still access the object.
-    /// assert_eq!(42, unsafe { *Weak::as_raw(&weak) });
+    /// assert_eq!("hello", unsafe { &*Weak::as_raw(&weak) });
     ///
     /// drop(strong);
     /// // But not any more. We can do Weak::as_raw(&weak), but accessing the pointer would lead to
     /// // undefined behaviour.
-    /// // assert_eq!(42, unsafe { *Weak::as_raw(&weak) });
+    /// // assert_eq!("hello", unsafe { &*Weak::as_raw(&weak) });
     /// ```
     ///
     /// [`null`]: ../../std/ptr/fn.null.html
@@ -1319,12 +1319,12 @@ impl<T> Weak<T> {
     ///
     /// use std::rc::{Rc, Weak};
     ///
-    /// let strong = Rc::new(42);
+    /// let strong = Rc::new("hello".to_owned());
     /// let weak = Rc::downgrade(&strong);
     /// let raw = Weak::into_raw(weak);
     ///
     /// assert_eq!(1, Rc::weak_count(&strong));
-    /// assert_eq!(42, unsafe { *raw });
+    /// assert_eq!("hello", unsafe { &*raw });
     ///
     /// drop(unsafe { Weak::from_raw(raw) });
     /// assert_eq!(0, Rc::weak_count(&strong));
@@ -1360,14 +1360,14 @@ impl<T> Weak<T> {
     ///
     /// use std::rc::{Rc, Weak};
     ///
-    /// let strong = Rc::new(42);
+    /// let strong = Rc::new("hello".to_owned());
     ///
     /// let raw_1 = Weak::into_raw(Rc::downgrade(&strong));
     /// let raw_2 = Weak::into_raw(Rc::downgrade(&strong));
     ///
     /// assert_eq!(2, Rc::weak_count(&strong));
     ///
-    /// assert_eq!(42, *Weak::upgrade(&unsafe { Weak::from_raw(raw_1) }).unwrap());
+    /// assert_eq!("hello", &*Weak::upgrade(&unsafe { Weak::from_raw(raw_1) }).unwrap());
     /// assert_eq!(1, Rc::weak_count(&strong));
     ///
     /// drop(strong);

src/liballoc/sync.rs

@@ -356,9 +356,9 @@ impl<T: ?Sized> Arc<T> {
     /// ```
     /// use std::sync::Arc;
     ///
-    /// let x = Arc::new(10);
+    /// let x = Arc::new("hello".to_owned());
     /// let x_ptr = Arc::into_raw(x);
-    /// assert_eq!(unsafe { *x_ptr }, 10);
+    /// assert_eq!(unsafe { &*x_ptr }, "hello");
     /// ```
     #[stable(feature = "rc_raw", since = "1.17.0")]
     pub fn into_raw(this: Self) -> *const T {
@@ -382,13 +382,13 @@ impl<T: ?Sized> Arc<T> {
     /// ```
     /// use std::sync::Arc;
     ///
-    /// let x = Arc::new(10);
+    /// let x = Arc::new("hello".to_owned());
     /// let x_ptr = Arc::into_raw(x);
     ///
     /// unsafe {
     ///     // Convert back to an `Arc` to prevent leak.
     ///     let x = Arc::from_raw(x_ptr);
-    ///     assert_eq!(*x, 10);
+    ///     assert_eq!(&*x, "hello");
     ///
     ///     // Further calls to `Arc::from_raw(x_ptr)` would be memory unsafe.
     /// }
@@ -418,10 +418,10 @@ impl<T: ?Sized> Arc<T> {
     ///
     /// use std::sync::Arc;
     ///
-    /// let x = Arc::new(10);
+    /// let x = Arc::new("hello".to_owned());
     /// let ptr = Arc::into_raw_non_null(x);
-    /// let deref = unsafe { *ptr.as_ref() };
-    /// assert_eq!(deref, 10);
+    /// let deref = unsafe { ptr.as_ref() };
+    /// assert_eq!(deref, "hello");
     /// ```
     #[unstable(feature = "rc_into_raw_non_null", issue = "47336")]
     #[inline]
@@ -1083,17 +1083,17 @@ impl<T> Weak<T> {
     /// use std::sync::{Arc, Weak};
     /// use std::ptr;
     ///
-    /// let strong = Arc::new(42);
+    /// let strong = Arc::new("hello".to_owned());
     /// let weak = Arc::downgrade(&strong);
     /// // Both point to the same object
     /// assert!(ptr::eq(&*strong, Weak::as_raw(&weak)));
     /// // The strong here keeps it alive, so we can still access the object.
-    /// assert_eq!(42, unsafe { *Weak::as_raw(&weak) });
+    /// assert_eq!("hello", unsafe { &*Weak::as_raw(&weak) });
     ///
     /// drop(strong);
     /// // But not any more. We can do Weak::as_raw(&weak), but accessing the pointer would lead to
     /// // undefined behaviour.
-    /// // assert_eq!(42, unsafe { *Weak::as_raw(&weak) });
+    /// // assert_eq!("hello", unsafe { &*Weak::as_raw(&weak) });
     /// ```
     ///
     /// [`null`]: ../../std/ptr/fn.null.html
@@ -1128,12 +1128,12 @@ impl<T> Weak<T> {
     ///
     /// use std::sync::{Arc, Weak};
     ///
-    /// let strong = Arc::new(42);
+    /// let strong = Arc::new("hello".to_owned());
     /// let weak = Arc::downgrade(&strong);
     /// let raw = Weak::into_raw(weak);
     ///
     /// assert_eq!(1, Arc::weak_count(&strong));
-    /// assert_eq!(42, unsafe { *raw });
+    /// assert_eq!("hello", unsafe { &*raw });
     ///
     /// drop(unsafe { Weak::from_raw(raw) });
     /// assert_eq!(0, Arc::weak_count(&strong));
@@ -1170,14 +1170,14 @@ impl<T> Weak<T> {
     ///
     /// use std::sync::{Arc, Weak};
     ///
-    /// let strong = Arc::new(42);
+    /// let strong = Arc::new("hello".to_owned());
     ///
     /// let raw_1 = Weak::into_raw(Arc::downgrade(&strong));
     /// let raw_2 = Weak::into_raw(Arc::downgrade(&strong));
     ///
     /// assert_eq!(2, Arc::weak_count(&strong));
     ///
-    /// assert_eq!(42, *Weak::upgrade(&unsafe { Weak::from_raw(raw_1) }).unwrap());
+    /// assert_eq!("hello", &*Weak::upgrade(&unsafe { Weak::from_raw(raw_1) }).unwrap());
     /// assert_eq!(1, Arc::weak_count(&strong));
     ///
     /// drop(strong);