typepunning.h

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#pragma once
//------------------------------------------------------------------------------
#include "core/types.h"
 
//------------------------------------------------------------------------------
namespace Util
{
 
template<typename A, typename B>
A& TypePunning(B &v)
{
    union
    {
        A *a;
        B *b;
    } pun;
    pun.b = &v;
    return *pun.a;
}
 
template<typename A, typename B>
const A& TypePunning(const B &v)
{
    union
    {
        const A *a;
        const B *b;
    } pun;
    pun.b = &v;
    return *pun.a;
}
 
} // namespace Util
//------------------------------------------------------------------------------