Am 01.02.15 um 08:58 schrieb Marko Rauhamaa:
> Paul Rubin <no.email@nospam.invalid>:
>
>> Marko Rauhamaa <ma...@pacujo.net> writes:
>>> Stroustrup apparently has never had to deal with callbacks; his thick
>>> books never made a mention of them last time I checked.
>>
>> C++ has function pointers just like C,
>
> Et tu, Brute!
>
> C's callbacks always use a void pointer for the "self reference." In C,
> I can use void pointers and type casts idiomatically. In C++, type casts
> are apostasy.
>
> Qt gave up on C++ when it comes to callbacks ("signals") and went for an
> apocryphal metacompiler.
Yes, but only because C++ compilers were not good enough when QT came
out, and later is was too late to change it to a templated system.
Lookup libsigc++ http://libsigc.sourceforge.net/ which does the same
using standard C++ and http://qt-project.org/doc/qt-4.8/templates.html
for a reasoning of QT.
In C++11 (supported by MSVC, g++, clang) there re also lambda expressions
Christian
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