> I've written something that redefines T to NIL, which surprises me
> because I thought that T was protected from redefinition like that, and
> I have not found a command in the code that looks like it is redefining T.
It is true that 'T' is protected from simple, direct modifications like
: (set T 7)
!? (set T 7)
T -- Protected symbol
but not from indirect, involved processings. PicoLisp always gives you enough
power to shoot into your foot ;)
> Could you check it out and see if its something in the code, or a bug in
> the language?
> # -> Mtx
> (de animate (Mtx) # -> a matrix list (Mtx ..)
> (actions (Mtx)) ) )
> # (animate (mtx 4))
The problem is that you call 'Mtx' as a function in (actions (Mtx)).
The value of 'Mtx' is not a function
: (mtx 4)
-> ((T T T T) (NIL NIL NIL NIL) (NIL NIL NIL NIL) (NIL NIL NIL NIL))
so what you end up doing is calling
'((T T T T) ...)
which *looks* like a fuction but is not *meant* to be one. It binds 'T' as a