I'm working on a piece of code and have been banging my head against the proverbial wall for quite some time now. I am kind of new to the whole concept of templates and so would appreciate any and all help I can get on the following problem:
I am trying to build a object builder that takes an allocator as argument as such:
class Allocator {
public:
allocate(unsigned int size, unsigned int alignment);
template <class T>
T* allocate_object() { return allocate(sizeof(T), alignof(T)); }
};
template <class ALLOCATOR>
class Builder {
public:
Builder(ALLOCATOR& a) : a(a) {}
void build_something() {
int* i = a.allocate_object<int>();
}
private:
ALLOCATOR& a;
};
When I try to call the 'build_something' function with my allocator i get the following compilation error: "error: expected primary-expression before 'int'"
The allocator works on its own as intended but can not be used as a template argument as in the example. So, is there something I can do to fix this without having to drop the template function in the allocator?
Preferably I would have liked to use polymorphism to send an allocator (base class) object pointer to the builder but apparently you can't have virtual template functions. :)
Thanks for the time! :) -Maigo
