[Bug-apl] SVN 984 changes

[Juergen Sauermann]

Hi,

I would like to inform you about 2 changes that I made in SVN 984.

1. Use of C++ casts instead of C casts
I have replaced every old-style C cast by either a C++ cast (static_cast<>(), reinterpret_cast<>(),
or const_cast<>()).
The reason for this change is to keep up with the changes in the C++ language.
Also, the Makefiles were changed to not allow C casts any longer.

2. APL_Float as class.
I have change the code so that one can use a class  APL_Float instead of the
previous typedef double APL_FLoat. An example class is provided in file
APL_Float_as_class.hh and the decision if a typedef or a class shall be used
is made in APL_types.hh via  #define APL_Float_is_class 0 or 1. This change
simplifies, for example, the introduction of libraries for higher precision arithmetic.

I hope all this still compiles on your machines. Make clean and a new ./configure is
required after SVN up.

Best Regards,
Jürgen Sauermann