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Diffstat (limited to 'src/doc/tutorial.md')
| -rw-r--r-- | src/doc/tutorial.md | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/src/doc/tutorial.md b/src/doc/tutorial.md index e0f0bbd6c9f..4c90e564b58 100644 --- a/src/doc/tutorial.md +++ b/src/doc/tutorial.md @@ -1470,7 +1470,7 @@ Now we can call `compute_distance()` in various ways: # let on_the_stack : Point = Point { x: 3.0, y: 4.0 }; # let on_the_heap : Box<Point> = box Point { x: 7.0, y: 9.0 }; # fn compute_distance(p1: &Point, p2: &Point) -> f64 { 0.0 } -compute_distance(&on_the_stack, on_the_heap); +compute_distance(&on_the_stack, &*on_the_heap); ~~~ Here the `&` operator is used to take the address of the variable @@ -1480,11 +1480,9 @@ reference. We also call this _borrowing_ the local variable `on_the_stack`, because we are creating an alias: that is, another route to the same data. -In the case of `owned_box`, however, no -explicit action is necessary. The compiler will automatically convert -a box `box point` to a reference like -`&point`. This is another form of borrowing; in this case, the -contents of the owned box are being lent out. +Likewise, in the case of `owned_box`, +the `&` operator is used in conjunction with the `*` operator +to take a reference to the contents of the box. Whenever a value is borrowed, there are some limitations on what you can do with the original. For example, if the contents of a variable |