[Boost-users] [preprocessor] Comparing strings in BOOST_PP_NOT_EQUAL

From: Maximilian Matthe (Maxi.Matthe_at_[hidden])
Date: 2008-07-14 13:21:01

Hi!

I'm developing with preprocessor a class generator,
that generates the wrapper classes needed by boost.python when
you want to derive in python from polymorph c++-base classes.

I would need a Macro that expands to "return" if its argument is
not void. I tried the following, but that obiously does not work:

#define Return(type) \
     BOOST_PP_EXPR_IF(BOOST_PP_NOT_EQUAL(type, void), return)

I made a workaround by adding an integer value to my Array that
defines the methods signature. But that is redundant.

Is there a way to achieve the behaviour above?