edits

Author: RalfJung

src/expressions.md

@@ -156,7 +156,7 @@ The following contexts are *place expression* contexts:
 
 * The left operand of an [assignment][assign] or [compound assignment]
   expression.
-* The operand of a unary [borrow] or [dereference][deref] operator.
+* The operand of a unary [borrow], [address-of][addr-of], or [dereference][deref] operator.
 * The operand of a field expression.
 * The indexed operand of an array indexing expression.
 * The operand of any [implicit borrow].
@@ -293,6 +293,7 @@ They are never allowed before:
 
 [assign]:               expressions/operator-expr.md#assignment-expressions
 [borrow]:               expressions/operator-expr.md#borrow-operators
+[addr-of]:              expressions/operator-expr.md#raw-address-of-operators
 [comparison]:           expressions/operator-expr.md#comparison-operators
 [compound assignment]:  expressions/operator-expr.md#compound-assignment-expressions
 [deref]:                expressions/operator-expr.md#the-dereference-operator

src/expressions/operator-expr.md

@@ -73,7 +73,7 @@ let a = & & & & mut 10;
 ### Raw address-of operators
 
 Related to the borrow operators are the *raw address-of operators*, which do not have first-class syntax, but are exposed via the macros `ptr::addr_of!(expr)` and `ptr::addr_of_mut!(expr)`.
-Like with `&`/`&mut`, the expression is evaluated in place expression context.
+Like with `&`/`&mut`, the expression `expr` is evaluated in place expression context.
 The difference is that `&`/`&mut` create *references* of type `&T`/`&mut T`, while `ptr::addr_of!(expr)` creates a (const) raw pointer of type `*const T` and `ptr::addr_of_mut!(expr)` creates a mutable raw pointer of type `*mut T`.
 
 The raw address-of operators must be used whenever the place expression could evaluate to a place that is not properly aligned or does not store a valid value as determined by its type.