C++/ D C struct2 D inner classes, C++ templates/D templates
dnewsgroup at billbaxter.com
Thu Jul 26 16:36:33 PDT 2007
> Hi Chris,
> MANY THANKS.
> Your help is kicking me into the right direction.
> In case that you have time enough: Here the /templated/ B+Tree Cpp
> Read it ? Do you see something not doable in D ?
> again, thanks for beeing so gentle and patient
The tricky thing, as with all STL-type C++, is translating the
iterators. The STL standard technique for iterators is to overload
operator* and operator->, which you can't do in D. So you need to use
methods or something for those instead. Something like iter.value or
iter.deref or iter.data, etc. Also there's a lot of passing of
references here and there in STL code like that. That's always kinda
tricky to figure out what to do with. Are you doing this with D2 or D
One issue I ran into trying to translate std::map was the use of the
idiom T(val) or T x(val) to construct objects. In C++ that works
fine whether T is an 'int', a class, or a struct. But in D (AFAIK)
there's no single expression that can be used to construct either a
plain value type or a class type with the given initializer. I didn't
really think about it too hard though. I decided it was easier to grab
ArcLib's RedBlackTree implementation and use that.
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