BOOST_PP_SEQ_SIZE

[anonymous]

I needed to use a sequence ( var1a , var1b )( var2a , var2b )

BOOST_PP_SEQ_SIZE would give incorrect number of parameters

I changed all the BOOST_PP_SEQ_SIZE_xxx definitations from BOOST_PP_SEQ_SIZE_0( _ ) to

#define BOOST_PP_SEQ_SIZE_0( ... ) BOOST_PP_SEQ_SIZE_1

solved the problem and makes the sequences more usefull.

[Edward Diener]

The notation:

( var1a , var1b )( var2a , var2b ) 

is not a Boost PP sequence. Each element of a Boost PP sequence must be a single-element tuple.

Therefore applying BOOST_PP_SEQ_SIZE to such syntax is undefined behavior.