You can use BOOST_PP_LIST_FOR_EACH #define ARG_LIST (char, (int, (unsigned int, (long, ...)))) #define DO_IT(r, data, elem) void foo( elem ); BOOST_PP_LIST_FOR_EACH( DO_IT, , ARG_LIST ) The LIST_FOR_EACH macro repeatedly calls DO_IT for every member in ARG_LIST. In DO_IT, r is the next available LIST_FOR_EACH repetition. data is the middle argument to LIST_FOR_EACH (in our case, nothing), and elem is the current element under inspection (char or int or unsigned int, etc...) HTH, Tanton ----- Original Message ----- From: "Eric Robert" To: Sent: Thursday, May 01, 2003 5:40 PM Subject: [Boost-Users] PP library...

Hi,

I think the preprocessor library could help me here but I'm having problems understanding it. Maybe someone will be so kind to explain it to me a bit. Here is what I want to produce:

void foo(char); void foo(int); void foo(unsigned int); ....

You got the idea. Something that repeats a list of things i.e. here, types. How can I do that?

Thanks! Eric

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Eric Robert wrote:

Hi,

I think the preprocessor library could help me here but I'm having problems understanding it. Maybe someone will be so kind to explain it to me a bit. Here is what I want to produce:

void foo(char); void foo(int); void foo(unsigned int); ....

You got the idea. Something that repeats a list of things i.e. here, types. How can I do that?

Thanks! Eric

The best way to do it depends on the scope (i.e. size) of what you want to repeat. Doing something like the above is pretty easy in a variety of different ways, but I'm guessing that you want to do something more complicated. Regards, Paul Mensonides