Hypodermic IoC Container

The Hypodermic workflow relies on two primary classes: ContainerBuilder and the container instance returned by build().

Registration

Use ContainerBuilder::registerType<T>() to tell the container which types it is responsible for creating. This allows the container to understand how to instantiate T and satisfy its dependencies.

Resolution

Once the container is built, use the resolve<T>() method to obtain an instance of the requested type. The container will automatically handle the instantiation and dependency graph construction for T based on your registrations.

ContainerBuilder builder;
builder.registerType< MessageDispatcher >();
auto container = builder.build();

auto dispatcher = container->resolve< MessageDispatcher >();

Hypodermic is a non-intrusive, header-only Inversion of Control (IoC) container for C++. It manages the creation and lifecycle of components and their dependencies, reducing the need for manual boilerplate code.

To use Hypodermic, you follow a two-step process:

1. Configure: Use a ContainerBuilder to register your component types.
2. Resolve: Build the container and use it to request instances of the registered types.

// 1. Configure the container by registering components
ContainerBuilder builder;
builder.registerType< MessageDispatcher >();
auto container = builder.build();

// 2. Resolve an instance of the type
auto dispatcher = container->resolve< MessageDispatcher >();