skillmon / tex_expkv Goto Github PK

As I understand it, bool and friends don't define \footrue and \foofalse and users have to define them on their own. From my experience I need them often, so I wanted to know if we can have a t-prefix which provides them. Because right now at least one probable redundancy that I can think of is bool foo \iffoo will set \iffoo and if I need \footrue, \foofalse I will have to use \newif\iffoo which will once again set \iffoo. So if expkv itself provides a new t-prefix which will set \footrue and \foofalse it would be great IMO.

Currently, while \ekvparse is alignment safe, \ekvset isn't.

A fix would be possible by putting \ekv@alignsafe at the start of \ekvset and using \ekv@endalignsafe before and another \ekv@alignsafe after every executed user code. This has an estimated performance hit of more than 10%. (This would also require changes in \ekvchangeset, and maybe a few other places)

Unlike with some other key=val parsers (that have some sort of brace bug), category 4 tokens (&) can be parsed without a problem by putting braces around them, so with a slight user adjustment this can be fixed with ease without affecting every other usage of \ekvset. Also, it is possible to use \ekvset in an alignment safe way (see expkv-cs, which does exactly that). And if the code is fully expandable, and \ekvset is the first thing to appear in an alignment cell, & aren't a problem as well (because TeX then scans for \omit during which it doesn't replace &).

Currently I tend to not make \ekvset alignment safe, but am open for discussion.

While using this type of keys, I was wondering when will someone actually require a boolean conditional like \iffoo without \footrue and \foofalse? If no such use-case can be thought of, why doesn't expkv only do \newif\iffoo?