Factory pattern in D
Chris via Digitalmars-d-learn
digitalmars-d-learn at puremagic.com
Fri May 1 03:01:16 PDT 2015
What would be the D equivalent of the factory pattern? This
obviously doesn't work:
struct A {
int x = 42;
}
struct B {
int x = 7;
}
auto factory(string type) {
if (type == "A")
return A();
else if (type == "B")
return B();
else
return A(); // default
}
void main()
{
auto a = factory("A");
}
Error: mismatched function return type inference of B and A
(dmd 2.067.1)
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