std::vector allocator?

[Gernot Frisch]

Hi,

when should I use std::vector<Type, Type&> and when std::vector<Type,
Type>?
What's the difference?

--
-Gernot
int main(int argc, char** argv) {printf
("%silto%c%cf%cgl%ssic%ccom%c", "ma", 58, 'g', 64, "ba", 46, 10);}

________________________________________
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[John Harrison]

Hi,

when should I use std::vector<Type, Type&> and when std::vector<Type,
Type>?
What's the difference?

Neither std::vector<Type, Type&> or std::vector<Type, Type> are legal
(unless, bizarrely, Type is an allocator and you are creating a vector of
allocators).

I think you should post some real code that illustrates what you are getting
at.

john

 

[Gernot Frisch]

(unless, bizarrely, Type is an allocator and you are creating a vector of
allocators).

I think you should post some real code that illustrates what you are getting
at.

Oh. I'm so sorry. I saw that my intellisense accepted 2 template
arguments and thought it's the same as in MFC's CArray. But since I'm
currently replacing MFC container classes with std:: containers, I
don't even care about what the difference in the MFC version is.
Sorry for wasing your time,
Gernot

 

[John Harrison]

Oh. I'm so sorry. I saw that my intellisense accepted 2 template
arguments and thought it's the same as in MFC's CArray. But since I'm
currently replacing MFC container classes with std:: containers, I
don't even care about what the difference in the MFC version is.
Sorry for wasing your time,
Gernot

No problem, the second template argument is for an allocator and you would
use it if you want your vector elements to be allocated in some non-standard
way. For instance (God forbid) you could write an allocator that used
GlobalAlloc instead of new.

john

 

[Gernot Frisch]

you could write an allocator that used

GlobalAlloc instead of new.

Yuck!