Question about binding

[banka50]

Hi, Krzysztof!
Can I do something like this:

struct CommandA {};
struct HandlerA {};

struct CommandB {};
struct HandlerB {};

auto injector = di::make_injector(
di::bind<CommandA, HandlerA>
, di::bind<CommandB, HandlerB>
);

auto handler = injector.create();

P.S. You wrote excellent library ;)

[krzysztof-jusiak]

Hi Alexey,

I'm not sure if I do understand the question correctly, so if you could elaborate a bit more I will definitely try to answer it more accurately.

Anyway, in your example Command{A, B} and Handler{A, B} are not related at all and, therefore, DI won't be able to create appropriate Commands, but what you can write is following:

struct CommandA {};
struct HandlerA : CommandA {
     // HandlerA(some other depenencies...) // additionally Di will take care of creating of all them
}; // new

struct CommandB {};
struct HandlerB : CommandB {}; // new

auto injector = di::make_injector(
      di::bind<CommandA>.to<HandlerA> // notice new binding interface with 'to'
    , di::bind<CommandB>.to<HandlerB>
);

auto handlerA = injector.create<std::unique_ptr<CommandA>>(); // will give you HandlerA
auto handlerB = injector.create<std::unique_ptr<CommandB>>(); // will give you HandlerB

Hope that helps a bit.

P.S. Cheers :)

[banka50]

Ok. Thanks :)