aarti_pl Wrote:
> Andrei Alexandrescu pisze:
> > We're trying to make that work. D is due for an operator overhaul.
> >
> > Andrei
>
> Is there any chance that we get possibility to overload "raw operators",
> like in C++? I think that they may coexist with currently defined
> operator overloads with simple semantic rules, which will not allow them
> to work together at the same time.
>
> I know that they may obfuscate code, but they are extremely useful when
> defining in D domain specific languages. For example I try to make SQL
> expressions work as D expressions:
>
> string query = "SELECT * FROM a WHERE id=5;";
> -->
> Query query = Select(a).Where(Equals(id, 5));
>
> * "id" is D object in second expression
>
> This translation is quite awful and unreadable. It would be so much
> better to get:
>
> Query query = Select(a).Where(id == 5);
>
> With implicit casts there will be perfect environment, to define DSL-s
> *in* D and *not* using unsafe strings.
>
> BR
> Marcin Kuszczak
> (aarti_pl)
Slightly off-topic.
How would you implement, say, LIKE condition? Similar to the following, perhaps:
Query query = Select(a).Where(id.Like("%substring%"));
You could implement "==" the same way:
Query query = Select(a).Where(id.EqualsTo(5));
