C ++ factory pattern syntax

Question

C ++ factory pattern syntax

In this question, the accepted answer uses the following syntax:

typedef std::map<std::string, Base*(*)()> map_type;

Can someone explain what the (*) means, I haven't seen it before?

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c ++ factory-pattern

stack user 16 oct. '14 at 9:30

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1 answer

Marco A. · Accepted Answer · 2014-10-16T09:31:05+0000

It is a function pointer that returns a pointer Base

and does not take any arguments, eg.

struct Base {};

Base* myfun() {
    return 0;
}

int main() {
    std::map<std::string, Base*(*)()> mymap;
    mymap.insert(std::make_pair("hello", myfun));
}

C ++ factory pattern syntax

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