Re: Language translation

Anthony Williams schrieb:
> Dear Group,
>
> I'm facing the problem to translate language A into language B. The
> problem is, that A is an object oriented language (it supports
> classes, attributes of classes ...). But B is much simpler. It hasn't
> support for classes. There is only variables, functions. And my
> Question: How Could I Implement Classes in B. (At first it would be
> sufficient, if i could "emulate" simple classes, that don't support
> inheritance, function hiding, polymorphy ...)


Just rephrasing what John said, in my own words and view:


An emulation typically adds an this/self instance reference to the
parameter list of every method. "Real" OO languages simply hide this
parameter in the source code, i.e. the compiler changes the parameter
list and calls accordingly. That's what your translator should add to
the translated source code. That's all about basic (static) methods.


Instance data is a record (struct...), containing all data fields of the
class.


BTW the first C++ compiler was such a translator, from C++ to C. I don't
remember its name, but it should be available in the museum - John?


DoDi
[cfront which you can find at http://www.softwarepreservation.org/projects/c_plus_plus
-John]

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