On 29-Jan-2017 11:29 PM, "Stefan Monnier" <monnier@iro.umontreal.ca> wrote:

Hmm... why do that in gethash?  Why not just check NILP (obj->weak)
when purecopying?

The rationale for this was that weak tables wouldn't be purecopied, so it
might be a good idea to inform the user about that beforhand. The simple
NILP (obj->weak) check in purecopy is much easier and wouldn't generate
errors, I'll switch to that instead.

> Should this work, or is there anything else I need to do?

I think this should work.

Alright then, I'll push this to master after adding some more documentation.

> +make_pure_hash_table (struct Lisp_Hash_Table *table) {

Nitpick: I'd call it `purecopy_hash_table`.

Other functions in alloc.c that perform pure allocation for different
objects are named in the same way (make_pure_string, make_pure_vector), so
I merely followed this convention.