Re: [Boost-users] boost variant compile time visitation: verification

21 Apr 2009


      Following my prev message, I wrote the following test on a win platform,
compiled with VS2005 /O2 in release mode

#include <iostream>
#include 
#include 

typedef boost::variant VT;

struct print_type : public boost::static_visitor {
  const char* operator()( int )
  {
    return "int";
  }
  const char* operator()( double )
  {
    return "double";
  }
  const char* operator()( char )
  {
    return "char";
  }  
};


int main()
{
  const VT v('c');
  LARGE_INTEGER usec0, usec1;
  const char* volatile res;
  
  QueryPerformanceCounter( &usec0 );
  for(size_t s=0; s<2000000; ++s)  
    res = v.apply_visitor( print_type() );
  QueryPerformanceCounter( &usec1 );
  std::cout<< (usec1.QuadPart - usec0.QuadPart) <

Re: [Boost-users] boost variant compile time visitation: verification

Hicham Mouline