Expression exp =null;

        try {

            // C:\\Users\\line47\\workspace\\ObjCFYPA\\src\\com\\icona\\antlr\\main\\ObjectiveC.g:1192:2: (exp= postfix_expression | '++' exp= unary_expression | '--' exp= unary_expression |op= unary_operator exp= cast_expression )

            int alt82=4;

            switch ( input.LA(1) ) {

    // $ANTLR start "unary_operator"

    // C:\\Users\\line47\\workspace\\ObjCFYPA\\src\\com\\icona\\antlr\\main\\ObjectiveC.g:1199:1: unary_operator returns [UnarySymbol symbol] : ( '&' | '*' | '-' | '~' | '!' );

    public final UnarySymbol unary_operator() throws RecognitionException {

        try {

            // C:\\Users\\line47\\workspace\\ObjCFYPA\\src\\com\\icona\\antlr\\main\\ObjectiveC.g:1201:2: ( '&' | '*' | '-' | '~' | '!' )

            int alt83=5;