Examples/test-suite/octave/member_pointer_runme.m

# Example using pointers to member functions

member_pointer

function check(what,expected,actual)
  if (expected != actual)
    error ("Failed: %s, Expected: %f, Actual: %f",what,expected,actual);
  endif
end

# Get the pointers

area_pt = areapt;
perim_pt = perimeterpt;

# Create some objects

s = Square(10);

# Do some calculations

check ("Square area ", 100.0, do_op(s,area_pt));
check ("Square perim", 40.0, do_op(s,perim_pt));

memberPtr = cvar.areavar;
memberPtr = cvar.perimetervar;

# Try the variables
check ("Square area ", 100.0, do_op(s,cvar.areavar));
check ("Square perim", 40.0, do_op(s,cvar.perimetervar));

# Modify one of the variables
cvar.areavar = perim_pt;

check ("Square perimeter", 40.0, do_op(s,cvar.areavar));

# Try the constants

memberPtr = AREAPT;
memberPtr = PERIMPT;
memberPtr = NULLPT;

check ("Square area ", 100.0, do_op(s,AREAPT));
check ("Square perim", 40.0, do_op(s,PERIMPT));