Using .with<T>(instance)

[jlhorner1974]

I'm trying to set up a call to .with() when registering a type with an existing instance of an object, following the sample on the Hypodermic github site, as shown below. The .with() executes without incident, but it does not wire up the dependency in the parent object, which is left empty. According to the docs, it seems this should work. Is there something I'm doing wrong?

class IFoo
{
public:
virtual void Bar() = 0;
};

class Foo : public IFoo
{
public:
virtual void Bar() override {};
};

class IBaz { };

class Baz : public IBaz
{
public:
Baz(std::shared_ptr foo) : m_pFoo(foo) {};
std::shared_ptr m_pFoo;
};

Hypodermic::ContainerBuilder builder;
auto foo = std::make_shared();
builder.registerType() .with(foo) .as();
builder.build();

auto pBaz = pContainer->resolve();

[ybainier]

Hi, your example do not compile, you are missing the template parameters.

Assuming you are trying to resolve Baz which should be injected a IFoo, and that you want to resolve Baz as a IBaz:

ContainerBuilder builder;

auto foo = std::make_shared< Foo >();

builder.registerType< Baz >()
           .with< IFoo >(foo)
           .as< IBaz >();

auto container = builder.build();

auto baz = container->resolve< IBaz >();

But you could write it that way too:

ContainerBuilder builder;

auto foo = std::make_shared< Foo >();

builder.registerInstance(foo).as< IFoo >();
builder.registerType< Baz >().as< IBaz >();

auto container = builder.build();

auto baz = container->resolve< IBaz >();

Is this solving your problem?

[jlhorner1974]

Ah, I see now -- I did have the template types in my post, but I didn't mark the text as code, so they got stripped when I submitted the post.

I see my problem now, and I feel stupid. In my call to resolve(), I passed in Baz as the type instead of IBaz, so of course, it wasn't working.

I fixed my mistake and all works as it should. Thank you for your help.