Workaround to "import" an exception from a DLL

[frame]

On Sunday, 14 March 2021 at 15:45:19 UTC, Imperatorn wrote:
> On Sunday, 14 March 2021 at 09:35:40 UTC, frame wrote:

> In the past I've used a two patterns which are kinda wierd but. 
> Basically the first is returning a tuple w value and exception 
> and just check it, kinda like Go. The second approach is to 
> have a function u can call to get the latest ex, kinda like 
> GetLastError win api

I think that is like my pattern actually. I can call a method for 
the latest exception. But to throw it I need to create a new 
instance and copy the data.

I would like to have a proxy that can copy the data into a new 
instance without manually checking for the type via string 
comparison. I don't care for the call trace, this data is 
collected and saved as string before the DLL function returns.

The idea is to scan the TypeInfo memory area of the exception and 
replace it with the one that is valid for current context so the 
object can be recognized later and set the call stack reference 
or whatever the crash causes to null. Alternatively a new 
instance should be created and data just copied automatically.