https://github.com/LibertyEiffel/Liberty/issues/68

Liberty should issue a warning in case a command is executed on a qualified expression of expanded type.

See also discussion on
http://wiki.liberty-eiffel.org/index.php/Expanded_or_reference#Traps_to_avoid_with_expanded_classes

For discussion here:
assume a force_to_bounds(a, b: INTEGER) feature in class INTEGER

class AUX
int: INTEGER
end

class TEST
test: is
local
a_int: INTEGER
do
create a_aux
a_aux.int.force_to_bounds(1, 2) -- [1] this has no effect and shall emit the warning
a_int.force_to_bounds(1, 2) -- [2] this has effect and shall just work
my_int.force_to_bounds(1, 2) -- [3] this has effect and shall just work
end
my_int: INTEGER
end

The warning shall occur, whenever command (or other feature call with side effects on the call target) is called on a foreign target I. e. with a statement containing at least two dots (.) before the command.

Commands directly executed on local variables or attributes of Current should be find from my understanding.

• We should check whether this behavior is fully tested.
• the wiki page on expanded types needs update when the warning is there