C++ Casting a pointer in a new?

Question

I have this line of code which I cannot make sense of.

ClassA *pointer= new( ( char* )BASE_ADDRESS)ClassA ;

What does this cast ( ( char* )BASE_ADDRESS) even mean?

BASE_ADDRESS is some memory location.

Read about 'placement new' http://en.cppreference.com/w/cpp/language/new — Jesper Juhl, Oct 18 '16 at 19:05
You will probably find all you need to know about using placement-new [from **this question**](https://stackoverflow.com/questions/222557/what-uses-are-there-for-placement-new). — WhozCraig, Oct 18 '16 at 19:07

score 4 · Accepted Answer · answered Oct 18 '16 at 19:06

4

This is called placement new. It constructs an object of type ClassA and puts it in the memory location specified by BASE_ADDRESS.

answered Oct 18 '16 at 19:06

R_Kapp

1 Answers1