www.pudn.com > Loki.rar > Test_Tuple.cpp

#include  
#include  
#include "HierarchyGenerators.h" 
 
using namespace Loki; 
 
template 
void PrintType(T &) 
{ 
    printf("%s\n", typeid(T).name()); 
} 
 
template 
class PrintTuple 
{ 
public: 
 
    template 
    explicit PrintTuple(const T &x) 
    { 
        PrintTuple X(x); 
        PrintType(Field(x)); 
    } 
}; 
 
template<> 
class PrintTuple<0> 
{ 
public: 
 
    template 
    explicit PrintTuple(const T &x) 
    { 
        PrintType(Field<0>(x)); 
    } 
}; 
 
 
template 
void PrintTupleFunc() 
{ 
    T   x; 
 
    PrintTuple::value - 1> X(x); 
} 
 
template struct A {}; 
 
int 
main() 
{ 
    typedef TYPELIST_11(A<1>, A<1>, int, int, A<1>, A<2>, int[10], int, int *, A<2>, A<3>) typelist_t;  
    typedef Tuple tuple_t; 
     
    PrintTupleFunc(); 
 
    tuple_t X; 
    A<3> Y = Field< A<3> >(X); 
     
    // without -Za warning C4239: nonstandard extension used 
    // this is because VC sometimes binds temporary to non-const reference 
    // which leads to selecting the wrong Field function (non-const version) 
    // fixed in VC7.1 
    Y = Field< A<3> >(tuple_t()); 
 
    A<3> &Y1 = Field< A<3> >(X); 
    Y1 = Y; 
}