Question

Is there an C++ casting operator (or combination thereof) equivalent to the old-style cast below:

struct MyStruct {
   int i;
   int j;
   int k;
};

void do_something_with_mystruct( MyStruct ms ) {
   ...
};

int main( int argc, char** argv ) {
   do_something_with_mystruct( (MyStruct){1,2,3} );
};

Answer 1

The construct

(MyStruct) {1,2,3}

is not actually a cast! It’s an ISO C99 “compound literal”. There is no equivalent using any of the C++ *_cast<> operators, because C++ (even C++0x) does not include this construct. Some compilers implement it as an extension to C++, but you still have to write it this way. See for instance http://gcc.gnu.org/onlinedocs/gcc-4.4.4/gcc/Compound-Literals.html.