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

AMDG Maximilian Matthe wrote:

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?

It's possible (See BOOST_MPL_PP_TOKEN_EQUAL) but it's probably easier to use void returns: void f(); void g() { return f(); } In Christ, Steven Watanabe