Re: [boost] [optional] Reference assignment

From: Joel de Guzman (joel_at_[hidden])
Date: 2003-11-05 08:51:22

Joel de Guzman <joel_at_[hidden]> wrote:
> Brian McNamara <lorgon_at_[hidden]> wrote:

>> Is this:
>> 
>>>     match<int&> m; // unitialized
>>>     m.value(3); // initializes m
>> 
>> also supposed to be legal?  I am guessing no, (for the same reason that
>> you can't say "int& x;") but I am not sure.
> 
> No, that's not legal.

Let me clarify a bit:

    match<int&> m; // unitialized

is legal. But:

    match<int&> m; // unitialized
    m.value(3); // initializes m

Is illegal (asserts logic error, if that happens).

--
Joel de Guzman
http://www.boost-consulting.com
http://spirit.sf.net