🚀 go-pugleaf

INC(CARDINAL(code), 1);

is not accepted by most Modula-2 compilers, because ``CARDINAL(code)'' is an
expression (an r-value, for those conversant with C's description) rather than
a variable (an l-value).  INC effectively takes a VAR parameter, so insists
upon having a variable.

I don't consider the cast to really be an expression.  I see it as a type
conversion which is more properly seen as a viewpoint change rather than a
computation.  I therefore consider this a silly restriction, and done
something about it in the Modula-2 compiler I maintain.  But it certainly
isn't standard.

 Joel McCormack