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trpl: small edits to pointers.md examples #21373

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merged 2 commits into from
Jan 23, 2015
Merged

trpl: small edits to pointers.md examples #21373

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4347cbb
Error message fixes and removed explicit returns in example code
angst7 Jan 18, 2015
9293607
quick formatting fix
angst7 Jan 18, 2015
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8 changes: 4 additions & 4 deletions src/doc/trpl/pointers.md
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Original file line number Diff line number Diff line change
Expand Up @@ -87,7 +87,7 @@ println!("{}", x + z);
This gives us an error:

```text
hello.rs:6:24: 6:25 error: mismatched types: expected `i32` but found `&i32` (expected i32 but found &-ptr)
hello.rs:6:24: 6:25 error: mismatched types: expected `_`, found `&_` (expected integral variable, found &-ptr)
hello.rs:6 println!("{}", x + z);
^
```
Expand Down Expand Up @@ -305,7 +305,7 @@ References are immutable by default:
let x = 5;
let y = &x;

*y = 5; // error: cannot assign to immutable dereference of `&`-pointer `*y`
*y = 5; // error: cannot assign to immutable borrowed content `*y`
```

They can be made mutable with `mut`, but only if its referent is also mutable.
Expand Down Expand Up @@ -668,7 +668,7 @@ struct BigStruct {
}

fn foo(x: Box<BigStruct>) -> Box<BigStruct> {
return Box::new(*x);
Box::new(*x)
}

fn main() {
Expand Down Expand Up @@ -696,7 +696,7 @@ struct BigStruct {
}

fn foo(x: Box<BigStruct>) -> BigStruct {
return *x;
*x
}

fn main() {
Expand Down