Re: float MyAdd(float A,float B); int MyAdd(int A, int B); both in one DLL

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From: Rob
Date: Sat, 05 Jul 2003 14:27

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"Edward Diener" <eddielee@tropicsoft.com> wrote in message
news:3f06de1f$1@newsgroups.borland.com...
> Remy Lebeau (TeamB) wrote:
> > "Miem Chan" <miemchan@yahoo.com> wrote in message
> > news:3f06547e@newsgroups.borland.com...
> >
> >> The problem (and my question) is how we can put
> >> both of these MyAdd functions in to a single DLL
> >> and expect to call proper MyAdd function depending
> >> on the parameters passed ?
> >
> > You can't.  DLLs don't support function overloading at all.  You have
> > to name each function differently.
>
> This just isn't true. Because of name-mangling in C++, you can have
function
> overloading in DLLs. Each function with the same base name gets a unique
> name-mangled name because of its different parameter list. Name mangling
> doesn't work only if the programmer wants to use extern "C" in order to
have
> the functions in the DLL called from other languages or other C++
> implementations. Only in this latter case is your statement above correct.
>

While what you say is correct, exporting mangled names from a DLL
basically means that DLL can only be used with code built with one
C++ compiler.   For a lot of usage patterns, that defeats the purpose
of having DLLs in the first place, or makes things more complicated
for developers using them.

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From: "Rob" <nospam@nonexistant.com>
Newsgroups: borland.public.cppbuilder.nativeapi,borland.public.cppbuilder.oodesign,borland.public.cppbuilder.students
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Subject: Re: float MyAdd(float A,float B); int MyAdd(int A, int B); both in one DLL
Date: Sat, 5 Jul 2003 23:57:00 +0930
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