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#include <iostream>
using namespace std;
// The assembler code (g++ -S moveswap.cc writes the assembler code on
// moveswap.S) of the Pointers and Refs constructors are identical: `behind
// the scenes' references are (const) pointers, with the compiler doing the
// derefencing for us
struct Pointers
{
std::ostream *d_ptr1;
std::ostream *d_ptr2;
Pointers(std::ostream *ptr1, std::ostream *ptr);
};
Pointers::Pointers(std::ostream *ptr1, std::ostream *ptr)
:
d_ptr1(ptr1),
d_ptr2(ptr)
{}
struct Refs
{
std::ostream &d_ref;
std::ostream *d_ptr;
Refs(std::ostream &ref, std::ostream *ptr);
};
Refs::Refs(std::ostream &ref, std::ostream *ptr)
:
d_ref(ref),
d_ptr(ptr)
{}
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