public final JPoclASTParser.expr0_return expr0() throws RecognitionException {
        JPoclASTParser.expr0_return retval = new JPoclASTParser.expr0_return();
        retval.start = input.LT(1);


        TypeTree root_0 = null;

        Token set79=null;
        JPoclASTParser.expr1_return expr178 =null;

        JPoclASTParser.expr1_return expr180 =null;


        TypeTree set79_tree=null;

        try {
            // C:\\Users\\pc\\Desktop\\IPL\\ew\\JPocl\\JPoclAST.g:102:8: ( expr1 ( ( '+' | '-' ) ^ expr1 )* )
            // C:\\Users\\pc\\Desktop\\IPL\\ew\\JPocl\\JPoclAST.g:102:10: expr1 ( ( '+' | '-' ) ^ expr1 )*
            {
            root_0 = (TypeTree)adaptor.nil();


            pushFollow(FOLLOW_expr1_in_expr0806);
            expr178=expr1();

            state._fsp--;

            adaptor.addChild(root_0, expr178.getTree());

            // C:\\Users\\pc\\Desktop\\IPL\\ew\\JPocl\\JPoclAST.g:102:16: ( ( '+' | '-' ) ^ expr1 )*
            loop16:
            do {
                int alt16=2;
                int LA16_0 = input.LA(1);

                if ( (LA16_0==27||LA16_0==29) ) {
                    alt16=1;
                }


                switch (alt16) {
            	case 1 :
            	    // C:\\Users\\pc\\Desktop\\IPL\\ew\\JPocl\\JPoclAST.g:102:17: ( '+' | '-' ) ^ expr1
            	    {
            	    set79=(Token)input.LT(1);

            	    set79=(Token)input.LT(1);

            	    if ( input.LA(1)==27||input.LA(1)==29 ) {
            	        input.consume();
            	        root_0 = (TypeTree)adaptor.becomeRoot(
            	        (TypeTree)adaptor.create(set79)
            	        , root_0);
            	        state.errorRecovery=false;
            	    }
            	    else {
            	        MismatchedSetException mse = new MismatchedSetException(null,input);
            	        throw mse;
            	    }


            	    pushFollow(FOLLOW_expr1_in_expr0818);
            	    expr180=expr1();

            	    state._fsp--;

            	    adaptor.addChild(root_0, expr180.getTree());

            	    }
            	    break;

            	default :
            	    break loop16;
                }
            } while (true);


            }

            retval.stop = input.LT(-1);


            retval.tree = (TypeTree)adaptor.rulePostProcessing(root_0);
            adaptor.setTokenBoundaries(retval.tree, retval.start, retval.stop);

        }

        catch (RecognitionException re) {
        	reportError(re);
        }

        finally {
        	// do for sure before leaving
        }
        return retval;
    }