04-unique_ptr3_bad.cpp
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#include <iostream>
#include <memory>
using namespace std;
class Example {
public:
Example()
{
cout << "Example::Example()" << endl;
}
Example(int a)
{
cout << "Example::Example(" << a << ")" << endl;
}
~Example()
{
cout << "Example::~Example()" << endl;
}
};
int genexc()
{
cout << "genexc()" << endl;
throw 0;
return 0;
}
void fun1(const unique_ptr<Example>& ptr, int b) {}
void fun2(int b, const unique_ptr<Example>& ptr) {}
int main()
{
cout << "One:" << endl;
try {
fun1(unique_ptr<Example>(new Example),
genexc()); // problem: evaluation order undefined
}
catch (...) {
}
cout << "Two:" << endl;
try {
fun2(genexc(), unique_ptr<Example>(new Example(
3))); // problem: evaluation order undefined
}
catch (...) {
}
}