[poppler] [RFC] Replace GooHash by std::unordered_map

[Oliver Sander]

On 21.02.2018 00:31, Albert Astals Cid wrote:

>
> I'd really appreciate other people's comments on this.

I am generally in favour of changes like this, provided there is no significant
increase in run-time or binary code size.  I think such changes do decrease
long-term maintenance costs, and they make it easier for new developers to
understand the code.  The current GooHash implementation may be a reasonable
implementation of a hash table (I didn't check), but it is completely undocumented,
and if I ever need to know what it does, I will have to read the code.
On the other hand, while that emplaceRangeMap lambda looks strange to me
on first sight too, all this modern C++ stuff is well described in books,
online articles and blog posts.
BTW: I always thought that changes like this couldn't be made because it makes
backporting patches from xpdf more difficult/impossible.  Is this not an issue
anymore?

Best,
Oliver

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