[Dlang-internal] Finding the module that caused a template instanciation

[Walter Bright]

On 12/18/2017 4:33 AM, Benjamin Thaut wrote:
> For my dll work I need some pointers from someone who has a deeper understanding 
> of how the template implementation inside dmd works. Here is the problem
> 
> Given a template instance I need to know which module caused this template to be 
> instanciated. I don't need the module the template was declared in but instead 
> the module that triggered the instanciation. This also has to work in cases 
> where the compiler re-uses existing template instances. In a re-use case I need 
> the module that caused instaciation of the re-used instance.

The model used internally by the compiler is "as if" it was instantiated every 
time it was used, and then duplicates are discarded by the linker. The compiler 
does an optimization internally by looking to see if it was already 
instantiated, and just pointing to that instead of instantiating it again.

I suspect the problem you're having is a dependency on who instantiated it that 
shouldn't be a dependency.