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Asked: 2026-06-13T20:29:00+00:00

This is exactly the same question title as found here – I would also

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This is exactly the same question title as found here – I would also like to store a memory address in a variable – or rather, a void* in a variable. However, I’d rather store it in some form of an int rather than a string, as I’d like to cast it back to a pointer afterwards.

This is because it is a member of a class that I would then like to serialize with boost serialize, and if I did use a void*, boost serialize might try to store what the pointer is pointing to, which wouldn’t be very sensible in my case.

I need this for 32 and 64 bit gcc and MSVC, so basically I was wondering whether there was an inbuilt integer type that was the size of pointers on the same platform. Alternatively, I guess I would need to IFDEF my own type?

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  1. Editorial Team

    intptr_t and uintptr_t are integer types that are large enough to hold a void*. They are defined by C++11 in <cstdint> and by C99 in <stdint.h>

    If uintptr_t is not available, you could try uintmax_t, defined in the same header(s) or by Boost in <boost/cstdint.hpp>.

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