General Directives

General directives are used to govern the parser and reader.

op(+Prec,+Kind,+Op_List)

Declare all symbols in Op_List as operators of precedence Prec and nature Kind.

hilog +Symbol_List

Declare all symbols in Symbol_List as hilog symbols.

features(+Symbol_List,+Feature_list)

Declare all symbols in Symbol_List as feature functor with associated feature list Feature_list. Element of Feature_list should be symbols.