| # Example using pointers to member functions |
| |
| from member_pointer import * |
| |
| def check(what, expected, actual): |
| if expected != actual: |
| raise RuntimeError ("Failed: " , what , " Expected: " , expected , " Actual: " , actual) |
| |
| # 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)) |
| |
