Possible enhancement: Concise return statements

[Jacob Carlborg]

On 2011-08-15 22:57, Andrei Alexandrescu wrote:
> On 8/15/11 2:19 PM, Jacob Carlborg wrote:
>> On 2011-08-15 21:00, Walter Bright wrote:
>>> On 8/15/2011 3:54 AM, Timon Gehr wrote:
>>>> 'When the last ExpressionStatement in a function body is missing the
>>>> ';', it is
>>>> implicitly returned.'
>>>
>>> This has been proposed several times before, it was also proposed for
>>> C++0x. The difficulty is it makes having a ; or not substantially alter
>>> the semantics. The history of these languages is that the presence or
>>> absence of ; can be hard to spot, as in:
>>>
>>> for (int i = 0; i < 10; i++);
>>> ... do this ...
>>>
>>> which has cost at least one expert developer I know an entire afternoon
>>> staring at it convinced there was a compiler bug because his loop
>>> executed only once.
>>>
>>> (And this is why D disallows this syntax.)
>>
>> Can't we always automatically return the last expression, even if it
>> ends with a semicolon?
>
> Then two semicolons mean return void :o).
>
> Andrei

Make two semicolons a syntax error.

-- 
/Jacob Carlborg