Incorrect treatment of disp statement in RHS when generating derived functions

[Schlevidon]

Summary

IFDIFF keeps disp calls in functions derived from the RHS (e.g. switching function, jump function, etc.). However, the arguments of the disp call are not added to the list of variables required to compute the function value, so IFDIFF removes them which leads to an error when calling the derived function.

Example

RHS

function dy = rhsDisp(t, y, p)
x = 10;
disp(x);

dy = 1;
if y > 1
    dy = 0;
end
end

with malformed switching function

%rhs_preprocessed_rhsDisp:1/1/0
function switchingValue = sw_rhs_preprocessed_rhsDisp_B1C3501C_1_1(datahandle,t,y,p)
    disp( x );
    switchEval_if_1 = 1 - (y);
    switchingValue = switchEval_if_1;
end