More expressive variable placement

[roblabla]

Imagine we're dissecting a tar file, and we're interested in a particular PNG file within the tar file. We might do something along those lines:

TAR tar @ 0;
PNG interesting_file @ 0x1234;

This will allow the user to inspect the overall TAR file, and simultaneously see the PNG living at offset 0x1234. While this is nice, it might be more interesting to allow the user to do something like:

TAR tar @ 0;
PNG interesting_file @ tar.files[12].offset;

In general, having a more expressive offset would unlock a few really interesting possibilities.

[WerWolv]

I definitely want to add this at some point. I might need to rethink the parsing / evaluation a little bit though, but this is a must have feature down the road for me.

[roblabla]

I'm pretty sure this is now fully supported by ImHex. Closing.