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How to detect if a class is used polymorphically?
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How to detect if a class is used polymorphically?
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Suppose in one old project (>1M lines), there is a class named Base which has two virtual functions foo and bar
class Base
{
public:
virtual void foo();
virtual void bar();
};
class Derived: public Base
{
public:
virtual void foo();
virtual void bar();
};
I suspect that Base is not used polymorphically, so foo/bar should not be virtual.
To confirm my ideas, I need to find out whether there is a statement like:
Base *b = new Derived;
but if we pass the pointer among a function, it would be hard to find out, for example:
Base *f()
{
...
Derived *d = /* ... */;
...
return d;
}
Is there any way to do that?
Make Derived inherit privately from Base. This will prevent implicit upcasts making Base* b = new Derived; a compile error.
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