nl: fail . should be used whenever an impossible state is encountered such as the default branch of a switch over all possible values of an enum : such an assertion may save future developers time when they try to add new states concode_field_sep PlaceHolder placeHolder concode_field_sep void equal concode_elem_sep void equal concode_elem_sep void isNotNull concode_elem_sep void isNotNull concode_elem_sep void isTrue concode_elem_sep void isTrue concode_elem_sep void isNull concode_elem_sep void isNull concode_elem_sep void isFalse concode_elem_sep void isFalse
code: void function ( ) { isTrue ( false ) ; }