c++ - Loki序列可以有多少个元素？

Question

我知道 boost MPL 列表或 vector 的最大长度是半可定义的，但在大约 30 个元素之后，编译器讨厌我。一个 Loki 序列可以有多少个元素，用户可以自定义吗？

Answer 1

implementation显示了 18 个隐藏的模板参数，所以这应该是上限

     template
     <
         typename T1  = NullType, typename T2  = NullType, typename T3  = NullType,
         typename T4  = NullType, typename T5  = NullType, typename T6  = NullType,
         typename T7  = NullType, typename T8  = NullType, typename T9  = NullType,
         typename T10 = NullType, typename T11 = NullType, typename T12 = NullType,
         typename T13 = NullType, typename T14 = NullType, typename T15 = NullType,
         typename T16 = NullType, typename T17 = NullType, typename T18 = NullType
     > 
     struct MakeTypelist { /* stuff */ };