Listing 1: Using a macro to typedef pointers to structures
/* This macro generates an opaque, unique, type whose name is
* given by the _otype_ parameter.
*/
#define stlsoft_gen_opaque(_otype_) \
typedef const struct __stlsoft_otype_##_otype_{ int i;} *_otype_;
stlsoft_gen_opaque(MyType1)
stlsoft_gen_opaque(MyType2)
MyType1 mt1 = 0x00000001; // Error
MyType2 mt2 = reinterpret_cast<MyType2>(0x00000001);
///...
void func(){
if(mt2 & 0x07070707) // Error
{
// ...
}
if(mt2 & reinterpret_cast<MyType2>(0x07070707)) // Error
{
// ...
}
if(reinterpret_cast<unsigned long>(mt2) & 0x07070707)
{
// ...
}
}
