Re-reading the ZX81 manual, spotted a reference to POP-2, a programming language i had somehow not heard of. Wikipedia
:
the function call
f(x, y, z);
can be written as
x, y, z; f();
(commas and semicolons being largely interchangeable) or even
x, y, z.f;
or
(x, y, z).f;
(Because of the stack-based paradigm)
@npub1e9y6...vdd5 and
@npub1z8rj...mrq6 might want a quick look if they haven't come across it.