Pascal wrote:
> just wanted to add that your custom security level suggestions are well
> thought out.
Thanks, if I can ever get my head wrapped around the structure of the J source,
I might be able to contribute to making such ideas a reality.
In that vein, having not used C in eons, I was confused by the definition of AF:
typedef A (*AF)();
so I asked about it on StackOverflow:
http://stackoverflow.com/questions/31948392/what-does-typedef-a-af-mean
<http://stackoverflow.com/questions/31948392/what-does-typedef-a-af-mean>
and learned a bunch of interesting things. For one:
> when you have the 3 fields f, g, and h, whose function I haven’t determined
> yet.
Turns out the type V is also used to represent adverbs and conjunctions, so
f/g/h represent *their* arguments. For another, Roger’s 1993 BAA presentation
is available at Vector, and covers a lot of the design of the J engine:
http://archive.vector.org.uk/trad/v094/hui094_85.pdf
<http://archive.vector.org.uk/trad/v094/hui094_85.pdf>
and, of course, I was informed that AF is a type designating a function
pointer, which makes sense, given that V uses them to capture the monadic and
dyadic definitions.
I also learned cdecl, which translates obscure C type declarations to English
and vice-versa, is available as an online service:
http://cdecl.org/ <http://cdecl.org/>
I’m sure this’ll come in handy if I keep diving into the J source.
-Dan
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