P99_IF_ELSE P99_IF_EMPTY P99_IF_EQ P99_IF_EQ_0 P99_IF_EQ_1 P99_IF_EQ_2 P99_IF_EQ_3 P99_IF_EQ_4 P99_IF_GE P99_IF_GE_0 P99_IF_GT P99_IF_LE P99_IF_LT P99_IF_LT_0 P99_IF_NE P99_IF_void P99_IF_VOID P99_PRAGMA

#define P99_IF_ELSE (   ... )    P99_IF_EQ_0(P99_IS_EQ_0(__VA_ARGS__)) A preprocessor control structure. Use this as follows P99_IF_ELSE(some_expression)(tokens_A)(tokens_B) This expands to tokens_B if the list expanded to the token 0 and to tokens_A in any other case. Observe the parenthesis around tokens_A and tokens_B. Definition at line 158 of file p99_if.h.