Re: [openMSX-devel] Re: [openMSX-commits] CVS: openMSX/src/sound MSXFmPac.cc,1.4,1.5 MSXFmPac.hh,1.2,1.3 Y8950.hh,1.15,1.16

[Joost Y. D. <an...@wo...>]

'Wouter Vermaelen' wrote about '[openMSX-devel] Re: [openMSX-commits] CVS: openMSX/src/sound MSXFmPac.cc,1.4,1.5 MSXFmPac.hh,1.2,1.3 Y8950.hh,1.15,1.16' - Sun, Apr 28, 2002 at 10:12:10PM CEST
> 
> 
> On Sun, 28 Apr 2002, Bas Wijnen wrote:
> 
> > +if (strncmp(reinterpret_cast <const char *>(PAC_Header), reinterpret_cast <const char *>(buffer), 16)==0) {
> 
> What is "reinterpret_cast", I've never seen it before. What is the
> difference with a 'normal' cast?

normal casts are casts that always just work.

In C++ there are a number of restricted casts that just do a subpart
of that work:

reinterpret_cast: will reinterpret to another type... this will for
example not do pointer->int ...

dynamic_cast: this does runtime type checking [e.g. for upcasting this
is the best way to do it]

const_cast: casts away a const.

There're some more I think, don't have my C++ book here [it's at work,
and I have holiday this week].

This allows to do finegrained casting and should be used as much as
possible instead of the standard casts.

Joost