Bogus example assigning to (constant) bound identifier

[lemmy]

The example below (copied from https://learntla.com/pluscal/behaviors/) is bogus and future Pcal translator versions won't accept it (see screenshot below). The "f" in the either statement is a bound identifier and thus cannot be assigned a value.

---- MODULE flags ----
EXTENDS TLC, Integers
(* --algorithm flags
variables f1 \in BOOLEAN, f2 \in BOOLEAN, f3 \in BOOLEAN
begin
  while TRUE do
    with f \in {f1, f2, f3} do
      either
        f := TRUE;
      or
        f := FALSE;
      end either;
    end with;
  end while;
end algorithm; *)

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[hwayne]

Working on a fixed version

[hwayne]

A stopgap is up for now that is fixed