On Thu, Jul 12, 2012 at 3:07 AM, Hicham Mouline
I have a number of questions, some of which are boost specific.
Hmm, haven't yet spotted the Boost questions.
1. const std::string cols[] = { "col1", "col2", "col3" }; Is the const native array cols completely a compile-time construct or are std::string objects constructed at runtime? I would guess the latter?
It would surprise me greatly if any compiler would run library runtime code at compile time in order to construct static objects.
2. const char const* cols[] = { "col1", "col2", "col3" }; This on the other hand would be pure compile time?
Yes, should work even in classic C.
3. struct S1 { const char const* cols[] = { "col1", "col2", "col3" }; }; struct S2 { const char const* cols[] = { "colx", "coly", "coly" }; };
template <typename T> /// T is either S1 or S2 struct S {
const char const* col1s[] = { "othercol", /// elements of T::cols }; };
Is there a way to build col1s at compile time?
I confess I'm not sure what you're trying to accomplish here. Wouldn't it suffice for the methods of S to directly reference T::cols ?