Question

i have the following code compiled with GCC 4.2 / XCode.

template <typename T>
class irrProcessBufferAllocator
{
public:

    T* allocate(size_t cnt)
    {
        return allocProcessBufferOfType<T>(cnt);
    }

    void deallocate(T* ptr)
    {
        if (ptr)
        {
            releaseProcessBuffer(ptr);
        }
    }

    void construct(T* ptr, const T& e)
    {
        new ((void*)ptr) T(e);//"error: expected type-specifier before 'e' " and
//error: expected `;' before 'e'
    }

    void destruct(T* ptr)
    {
        ptr->~T();//error: expected class-name before ';' token
    }

};

i really can’t figure out how to fix the errors.
please help,

Thanks.

Answer 1

Just to make sure, you are not missing necessary includes: <cstddef> for std::size_t and <new> for placement new?

Otherwise those functions would appear to be correct. If that is the entire allocator, it has other flaws, such as missing required typedefs, address() and max_size() methods, as well as a rebind template.

---

Edit: The only cause for the error could be that you have a function-style macro T defined.

#define T(z) zzz

would make the preprocessor replace all T()‘s it encounters, but leave the Ts not followed by brackets.

You could just rename the template argument.