boost之正确性和测试

BOOST_ASSERT在debug模式下有效。

#include <iostream>
#include <boost/assert.hpp>
using namespace std;
using namespace boost;
 
double fun(int x)
{
	BOOST_ASSERT(x!=0 && "divede by zero");
	return 1.0/x;
}
int main()
{
	fun(0);
	return 0;
}

获取更多的诊断信息:

#include <iostream>
#include <boost/assert.hpp>
#include <boost/format.hpp>
using namespace std;
using namespace boost;
#define  BOOST_ENABLE_ASSERT_HANDLER
namespace boost
{
	void assertion_failed(char const * exptr,char const *function,char const * file,long line)
	{
		boost::format fmt("Assertion failed!\n Expression: %s\n Function :%s\nFile %s\nLine:%ld\n\n");
			fmt % exptr % function % file%line;
			cout << fmt;
	}
}
 
double fun(int x)
{
	BOOST_ASSERT(x!=0 && "divede by zero");
	return 1.0/x;
}
int main()
{
	fun(0);
	return 0;
}

静态断言，将错误转移到编译期内

#include <iostream>
#include <boost/static_assert.hpp>
using namespace std;
using namespace boost;
 
template<typename T>
T my_min(T a,T b)
{
	BOOST_STATIC_ASSERT(sizeof(T) < sizeof(int));
	return a < b ? a:b;
}
 
int main()
{
	cout << my_min((short)1,(short)3);
	//cout << my_min(1L,3L);
	return 0;
}