language: C++ 4.7.2 (gcc-4.7.2)
date: 648 days 10 hours ago
link:
visibility: public 
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#include <iostream>
#include <typeinfo>
#include <climits>
 
using namespace std;
 
class true_type {};
class false_type {};
 
template<bool> 
struct bool2type 
{ 
  typedef true_type  type; 
};
 
template<>
struct bool2type<false>
{
  typedef false_type  type;
};
 
template<int M, int L, int H>
struct within_range
{
   static const bool value = L <= M && M <=H;
   typedef typename bool2type<value>::type type;
};
 
template<int M, class booltype> 
struct IntegerType;
 
template<int Max> 
struct IntegerType<Max,typename within_range<Max, 0, 127>::type >
{
   typedef char type;
};
 
template<int Max> 
struct IntegerType<Max,typename within_range<Max, 128, 32767>::type >
{
   typedef short type;
};
 
template<int Max> 
struct IntegerType<Max,typename within_range<Max, 32768, INT_MAX>::type >
{
   typedef int type;
};
 
template <int Max>
struct Integer {
    typedef typename IntegerType<Max, true_type>::type type;
};
 
int main() {
        cout << typeid(Integer<122>::type).name() << endl;
        cout << typeid(Integer<1798>::type).name() << endl;
        cout << typeid(Integer<890908>::type).name() << endl;
        return 0;
}