Terje Slettebų wrote:
>> MACRO( IN(2, (std::pair<int, int>)) )
>
> I'm not sure how this latter solution could be used. How could MACRO
> retrieve the type being passed?
You have to encode the type in a structure, and then decode it when you actually
need it:
#define IN(s, x) (s) x
#define OUT(type) BOOST_PP_TUPLE_REM type
#define MACRO(z, i, type) \
BOOST_PP_CAT(class T, i) = OUT(type) \
/**/
template<
BOOST_PP_ENUM(
3, MACRO,
IN(2, (std::pair<int, int>))
)
> class xyz;
Passing in an intermediate value like this:
#define ID2(a, b) a, b
#define MACRO(x) x
MACRO( ID2( std::pair<int, int> ) )
...is error prone (and dangerous). :(
Regards,
Paul Mensonides
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