Ichthyostega
52eb4c4709
this is the first building block in an attempt to protrect against time wraparound. The intention is not to be airtight, but practically effective. A really airtight solution would require writing our own SafeInt class
74 lines
1.9 KiB
C++
74 lines
1.9 KiB
C++
/* try.cpp - for trying out some language features....
|
|
* scons will create the binary bin/try
|
|
*
|
|
*/
|
|
|
|
// 8/07 - how to control NOBUG??
|
|
// execute with NOBUG_LOG='ttt:TRACE' bin/try
|
|
// 1/08 - working out a static initialisation problem for Visitor (Tag creation)
|
|
// 1/08 - check 64bit longs
|
|
// 4/08 - comparison operators on shared_ptr<Asset>
|
|
// 4/08 - conversions on the value_type used for boost::any
|
|
// 5/08 - how to guard a downcasting access, so it is compiled in only if the involved types are convertible
|
|
// 7/08 - combining partial specialisation and subclasses
|
|
// 10/8 - abusing the STL containers to hold noncopyable values
|
|
// 6/09 - investigating how to build a mixin template providing an operator bool()
|
|
// 12/9 - tracking down a strange "warning: type qualifiers ignored on function return type"
|
|
// 1/10 - can we determine at compile time the presence of a certain function (for duck-typing)?
|
|
// 4/10 - pretty printing STL containers with python enabled GDB?
|
|
// 1/11 - exploring numeric limits
|
|
|
|
|
|
//#include <nobug.h>
|
|
|
|
|
|
#include <iostream>
|
|
//#include <typeinfo>
|
|
#include <string>
|
|
//#include <cstdlib>
|
|
#include <limits>
|
|
|
|
#include <boost/format.hpp>
|
|
|
|
|
|
using boost::format;
|
|
//using std::rand;
|
|
using std::string;
|
|
using std::cout;
|
|
using std::endl;
|
|
|
|
void
|
|
checkDiv(int lhs, int rhs)
|
|
{
|
|
cout << format ("%f / %f = %f \n") % lhs % rhs % (lhs / rhs);
|
|
}
|
|
|
|
int
|
|
main (int, char**)
|
|
{
|
|
|
|
// NOBUG_INIT;
|
|
|
|
checkDiv (8,4);
|
|
checkDiv (9,4);
|
|
checkDiv (-8,4);
|
|
checkDiv (-9,4);
|
|
checkDiv (8,-4);
|
|
checkDiv (9,-4);
|
|
checkDiv (-8,-4);
|
|
checkDiv (-9,-4);
|
|
|
|
|
|
int64_t muks = std::numeric_limits<int64_t>::max();
|
|
muks /= 30;
|
|
double murks(muks);
|
|
|
|
cout << format("%f // %f || %g \n") % muks % murks % std::numeric_limits<double>::epsilon();
|
|
|
|
int64_t glucks = murks;
|
|
cout << glucks <<endl;
|
|
|
|
cout << "\n.gulp.\n";
|
|
|
|
return 0;
|
|
}
|