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clarfiy reference with regards to the value of block expressions #22307

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Feb 16, 2015
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clarfiy reference with regards to the value of block expressions #22307

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16 changes: 13 additions & 3 deletions src/doc/reference.md
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Expand Up @@ -2701,9 +2701,19 @@ items can bring new names into scopes and declared items are in scope for only
the block itself.

A block will execute each statement sequentially, and then execute the
expression (if given). If the final expression is omitted, the type and return
value of the block are `()`, but if it is provided, the type and return value
of the block are that of the expression itself.
expression (if given). If the block ends in a statement, its value is `()`:

```
let x: () = { println!("Hello."); };
```

If it ends in an expression, its value and type are that of the expression:

```
let x: i32 = { println!("Hello."); 5 };

assert_eq!(5, x);
```

### Method-call expressions

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