DEFAULT-FILL
Arguments: expression [generic-function]
fills holes in interpolation expressions having the standard constraint syntax. For example, (0_7 (interp (4 7 11) (2 5 6)) 12_15 (interp (3 8 10) (4 7 11))) is translated into (0_7 (interp (4 7 11) (2 5 6)) 8_11 (interp (2 5 6) (3810)) 12_15 (interp (3 8 10) (4 7 11)))
