try and fail to make the mobile style prettier

[rust-101.git] / src / part04.rs

diff --git a/src/part04.rs b/src/part04.rs
index 754ba625c9227453b145ddbfabf041ab8c1701ed..dc116ee3ab54b505b632d298a861fcbfe9beed74 100644 (file)
--- a/src/part04.rs
+++ b/src/part04.rs
@@ -50,9 +50,9 @@ fn ownership_demo() {
 //@ we wanted! Can't we somehow give `vec_min` access to the vector, while retaining ownership of it?
 //@ 
 //@ Rust calls this *a reference* the vector, and it considers references as *borrowing* ownership. This
 //@ we wanted! Can't we somehow give `vec_min` access to the vector, while retaining ownership of it?
 //@ 
 //@ Rust calls this *a reference* the vector, and it considers references as *borrowing* ownership. This

-//@ works a bit like borrowing does in the real world: If you borrow a book to your friend, your friend
+//@ works a bit like borrowing does in the real world: If your friend borrows a book from you, your friend

 //@ can have it and work on it (and you can't!) as long as the book is still borrowed. Your friend could
 //@ can have it and work on it (and you can't!) as long as the book is still borrowed. Your friend could

-//@ even borrow the book to someone else. Eventually however, your friend has to give the book back to you,
+//@ even lend the book to someone else. Eventually however, your friend has to give the book back to you,

 //@ at which point you again have full control.
 //@ 
 //@ Rust distinguishes between two kinds of references. First of all, there's the *shared* reference.
 //@ at which point you again have full control.
 //@ 
 //@ Rust distinguishes between two kinds of references. First of all, there's the *shared* reference.


@@ -88,7 +88,7 @@ fn shared_ref_demo() {
     vec_min(&v);
     println!("The first element is: {}", *first);
 }
     vec_min(&v);
     println!("The first element is: {}", *first);
 }

-//@ What's going on here? First, `&` is how you borrow ownership to someone - this operator creates a shared reference.
+//@ What's going on here? First, `&` is how you lend ownership to someone - this operator creates a shared reference.

 //@ `shared_ref_demo` creates three shared references to `v`:
 //@ The reference `first` begins in the 2nd line of the function and lasts all the way to the end. The other two
 //@ references, created for calling `vec_min`, only last for the duration of that respective call.
 //@ `shared_ref_demo` creates three shared references to `v`:
 //@ The reference `first` begins in the 2nd line of the function and lasts all the way to the end. The other two
 //@ references, created for calling `vec_min`, only last for the duration of that respective call.


@@ -98,13 +98,13 @@ fn shared_ref_demo() {
 //@ that was created before calling `vec_min` remains valid.
 
 // ## Unique, mutable references
 //@ that was created before calling `vec_min` remains valid.
 
 // ## Unique, mutable references

-//@ There is a second way to borrow something, a second kind of reference: The *unique reference*. This is a reference that comes with the promise that
-//@ nobody else has *any kind of access* to the referee - there is no aliasing. As a consequence, it is always safe to mutate data through
-//@ an unique reference, which is why they are usually called *mutable references*.
+//@ There is a second way to borrow something, a second kind of reference: The *mutable reference*. This is a reference that comes with the promise
+//@ that nobody else has *any kind of access* to the referee - in contrast to shared references, there is no aliasing with mutable references. It is thus always safe to perform mutation through such a reference.
+//@ Because there cannot be another reference to the same data, we could also call it a *unique* reference, but that is not their official name.

 
 //@ As an example, consider a function which increments every element of a vector by 1.
 //@ The type `&mut Vec<i32>` is the type of mutable references to `vec<i32>`. Because the reference is
 
 //@ As an example, consider a function which increments every element of a vector by 1.
 //@ The type `&mut Vec<i32>` is the type of mutable references to `vec<i32>`. Because the reference is

-//@ mutable, we can use a mutable iterator, providing mutable (unique) references to the elements.
+//@ mutable, we can use a mutable iterator, providing mutable references to the elements.

 fn vec_inc(v: &mut Vec<i32>) {
     for e in v.iter_mut() {
         *e += 1;
 fn vec_inc(v: &mut Vec<i32>) {
     for e in v.iter_mut() {
         *e += 1;