The Right Approach to Exceptions

[Robert Jacques]

On Mon, 20 Feb 2012 21:08:07 -0600, H. S. Teoh <hsteoh at quickfur.ath.cx> wrote:

> On Mon, Feb 20, 2012 at 08:41:47PM -0600, Andrei Alexandrescu wrote:
>> On 2/20/12 8:33 PM, Robert Jacques wrote:
>> >Variant e = new MyException();
>> >writeln( e.filename, e.line, e.column);
>> >
>> >Aren't __traits and opDispatch fun?
>>
>> I thought the same, but was afraid to bring the nuclear bomb out :o).
> [...]
>
> Mmm... but *this* nuclear bomb, I like. :-)
>
>
> T

It gets better, you can also create prototype objects:

     Variant p1 = Tuple!(real,"x",real,"y")(1,2);

     Variant p2;                        // An unitialized Variants attemps to convert
     p2.x = 1;                          // itself to Variant[string] on assignment
     p2.__reflect("y",Variant(2) );
     p2["opBinary!+"]  = (Variant a, real b   ){return b;  }; // Create an 'operator'
     p2["opBinary!+"] ~= (Variant a, Variant b){return a.x;}; // overload set

     assert( (p2 + 4) == 4 && (p2 + p1) == 1);