[CAS] Detection of errors in the program editor

[compsystems]

(CAS HPP-PL) Programming Language of the calculator HP-Prime CAS mode

PHP Code:

#cas
  bbb():=
  begin
    purge(a);
    print (5=6); wait; 
    print (a=5); wait; 
    return "Done";
  end;
#end 


->
5=6 //ok
a=5 //ok



the following statement the (CAS HPP-PL) compiler must detect the error

PHP Code:

...
  purge(a);
  if( (a = 5) and true) then
  ... 


"Error: is not possible to determine the logical value of a = 5"