Is it possible to construct a pointer instead of shared_ptr?

[Former user]

Could we construct a pointer instead of shared_ptr directly? We need a unique_ptr actually, but as it's forbidden to passed out by dicpp, create by raw pointer may be a workaround.

[Sohail Somani]

What you're looking for is the ability to allocate memory that is unmanaged by dicpp but use all of the other niceness.

So one option is the following:

1. Create a new provider (unmanaged) that returns a shared_ptr with a null deleter
2. Patch the code to add an overload to cast from shared_ptr to unique_ptr. I would also put in a check to ensure that anything constructed into a unique_ptr is not managed here
3. When you register all the types that should be unmanaged, use the unmanaged provider: r.add(r.type<Whatever>().provider<unmanaged>())

Then you can use std::unique_ptr as a parameter for your constructors.

Let me know if you have any problems with this.

[王宇鹏]

I'm sorry, I couldn't find an example, and based on my limited knowledge of C++, I don't know how to implement 1&2-_-(I do tried...) Would you mind provide an example please? Great thanks!

[Sohail Somani]

If your knowledge of C++ is limited then I suggest you not go down this path for now.

[Sohail Somani]

Not sure on the usefulness of creating unmanaged memory via dicpp.

[Sohail Somani]

Not sure on the usefulness of creating unmanaged memory via dicpp.

[Sohail Somani]

Check out Boost.DI instead: https://github.com/boost-experimental/di