[WORK] std.file.update function

[Stefan Koch via Digitalmars-d]

On Monday, 19 September 2016 at 14:04:03 UTC, Andrei Alexandrescu 
wrote:
>
> Interesting. What happens e.g. if one makes a change to a 
> function whose generated code is somewhere in the middle of the 
> object file? If it doesn't alter the call graph, doesn't the 
> new .o file share a common prefix with the old one?

Only if the TOC is unchanged.
There are a lot of common sections in the same order but with 
different offsets.
we would need some binary patching method.

But I am unaware of file-systems supporting this.
Microsofts incremental linking mechnism makes use of thunks so it 
can avoid changing the header iirc.

But all of this needs codegen to adept.