Re: [boost-ext] Looking for Review Manager/s

From: Krzysztof Jusiak (krzysztof_at_[hidden])
Date: 2021-02-20 23:22:06

Great question. There are multiple ways of distinguishing them but IMHO
strong types would be the most elegant/encouraged when used with DI.

struct X {
  name_t name;
};

struct Y {
  title_t title
};

auto injector = di::make_injector(
  bind<name_t>.to("name"),
  bind<title_t>.to("title")
);

Alternatively, named annotations can be used too
- https://boost-ext.github.io/di/tutorial.html (search named or annotations)

Or what it's called a context injection

auto injector = di::make_injector(
  bind<std::string>.when<X>.to("name"),
  bind<std::string>.when<Y>.to("title")
);

On Sat, Feb 20, 2021 at 9:44 AM Peter Dimov via Boost <boost_at_[hidden]>
wrote:

> Krzysztof Jusiak wrote:
> >    documentation: https://boost-ext.github.io/di/
>
> This brings up one pretty obvious question, what if I have two constructor
> parameters of the same type:
>
> struct X
> {
>     std::string name;
> };
>
> struct Y
> {
>     std::string title;
> };
>
> struct Z
> {
>     X x;
>     Y y;
> };
>
> How do I inject specific values for X::name and Y::title?
>
>
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