Question

Is it possible to get typename of a member variable? For example:

struct C { int value ; };

typedef typeof(C::value) type; // something like that?

Thanks

Answer 1

Not in C++03. C++0x introduces decltype:

typedef decltype(C::value) type;

Some compilers have a typeof extension, though:

typedef typeof(C::value) type; // gcc

If you’re okay with Boost, they have a library for it:

typedef BOOST_TYPEOF(C::value) type;