Re: Deleting a passed-by-reference object in a function
M. Shoaib Surya wrote:
Is it okay to delete an new'ed object in the function that has been
passed-by-reference.
Please check the statement "delete pCalled;" in the following code
snippet.
void Test(int& i)
{
int* pCalled = &i;
printf("Address in Called: %d\n", pCalled);
delete pCalled;
}
int main()
{
int* pCaller = new int(10);
printf("Address in Caller: %d\n", pCaller);
Test(*pCaller);
}
The thing is that it is running fine in VC and the pointer also has the
same value. But, what I am wondering is that is it possible that this is a
platform-specific implementation of the compiler and this code might break
on other platforms, or is it a defined behavior and perfectly legal in
C++?
This code is perfectly legal. However (I guess you know that yourself
though) it is also really bad code because it violates the principle of
least surprise.
Suggestion:
- Don't delete it inside the function.
- Use a std::auto_ptr<int> in order to clearly document that ownership is
transferred.
Uli
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