How to define a function that can return a pointer to itself?
I want to write code like this:
/*something*/ Fn() { ... }
int main()
{
/*something*/ fn = Fn;
while(fn) fn = fn();
return 0;
}
Is it possible to do this is a fully type safe way? Assume C, C++, D, C#, Java, or any other staticall开发者_开发问答y typed language.
Here is a C# example
delegate MyFunctionDelegate MyFunctionDelegate();
class Program
{
static void Main(string[] args)
{
MyFunctionDelegate fn = FN1;
while (fn!=null)
fn = fn();
}
static MyFunctionDelegate FN1()
{
Console.WriteLine("FN1 called");
MyFunctionDelegate returnDelegate = FN2;
return returnDelegate;
}
static MyFunctionDelegate FN2()
{
Console.WriteLine("FN2 called");
return null;
}
}
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