1920 void *visit(ref_expression_c *symbol) {return  s4o.print("REF("); symbol->exp->accept(*this); s4o.print(")");} /* an extension to the IEC 61131-3 standard - based on the IEC 61131-3 v3 standard. Returns address of the varible! */

  1920 void *visit(   ref_expression_c *symbol) {return  s4o.print( "REF("); symbol->exp->accept(*this); s4o.print(")");} /* an extension to the IEC 61131-3 standard - based on the IEC 61131-3 v3 standard. Returns address of the varible! */

  1921 void *visit(or_expression_c *symbol) {return print_binary_expression(symbol, symbol->l_exp, symbol->r_exp, " OR ");}

  1921 void *visit( deref_expression_c *symbol) {return  s4o.print("DREF("); symbol->exp->accept(*this); s4o.print(")");} /* an extension to the IEC 61131-3 standard - based on the IEC 61131-3 v3 standard. Returns address of the varible! */

  1922 void *visit(xor_expression_c *symbol) {return print_binary_expression(symbol, symbol->l_exp, symbol->r_exp, " XOR ");}

  1922 void *visit(    or_expression_c *symbol) {return print_binary_expression(symbol, symbol->l_exp, symbol->r_exp, " OR ");}

  1923 void *visit(and_expression_c *symbol) {return print_binary_expression(symbol, symbol->l_exp, symbol->r_exp, " AND ");}

  1923 void *visit(   xor_expression_c *symbol) {return print_binary_expression(symbol, symbol->l_exp, symbol->r_exp, " XOR ");}

  1924 void *visit(equ_expression_c *symbol) {return print_binary_expression(symbol, symbol->l_exp, symbol->r_exp, " = ");}

  1924 void *visit(   and_expression_c *symbol) {return print_binary_expression(symbol, symbol->l_exp, symbol->r_exp, " AND ");}

  1925 void *visit(   equ_expression_c *symbol) {return print_binary_expression(symbol, symbol->l_exp, symbol->r_exp, " = ");}

  1926 void *visit(lt_expression_c *symbol) {return print_binary_expression(symbol, symbol->l_exp, symbol->r_exp, " < ");}

  1927 void *visit(    lt_expression_c *symbol) {return print_binary_expression(symbol, symbol->l_exp, symbol->r_exp, " < ");}

  1927 void *visit(gt_expression_c *symbol) {return print_binary_expression(symbol, symbol->l_exp, symbol->r_exp, " > ");}

  1928 void *visit(    gt_expression_c *symbol) {return print_binary_expression(symbol, symbol->l_exp, symbol->r_exp, " > ");}

  1928 void *visit(le_expression_c *symbol) {return print_binary_expression(symbol, symbol->l_exp, symbol->r_exp, " <= ");}

  1929 void *visit(    le_expression_c *symbol) {return print_binary_expression(symbol, symbol->l_exp, symbol->r_exp, " <= ");}

  1929 void *visit(ge_expression_c *symbol) {return print_binary_expression(symbol, symbol->l_exp, symbol->r_exp, " >= ");}

  1930 void *visit(    ge_expression_c *symbol) {return print_binary_expression(symbol, symbol->l_exp, symbol->r_exp, " >= ");}

  1930 void *visit(add_expression_c *symbol) {return print_binary_expression(symbol, symbol->l_exp, symbol->r_exp, " + ");}

  1931 void *visit(   add_expression_c *symbol) {return print_binary_expression(symbol, symbol->l_exp, symbol->r_exp, " + ");}

  1931 void *visit(sub_expression_c *symbol) {return print_binary_expression(symbol, symbol->l_exp, symbol->r_exp, " - ");}

  1932 void *visit(   sub_expression_c *symbol) {return print_binary_expression(symbol, symbol->l_exp, symbol->r_exp, " - ");}

  1932 void *visit(mul_expression_c *symbol) {return print_binary_expression(symbol, symbol->l_exp, symbol->r_exp, " * ");}

  1933 void *visit(   mul_expression_c *symbol) {return print_binary_expression(symbol, symbol->l_exp, symbol->r_exp, " * ");}

  1933 void *visit(div_expression_c *symbol) {return print_binary_expression(symbol, symbol->l_exp, symbol->r_exp, " / ");}

  1934 void *visit(   div_expression_c *symbol) {return print_binary_expression(symbol, symbol->l_exp, symbol->r_exp, " / ");}

  1934 void *visit(mod_expression_c *symbol) {return print_binary_expression(symbol, symbol->l_exp, symbol->r_exp, " MOD ");}

  1935 void *visit(   mod_expression_c *symbol) {return print_binary_expression(symbol, symbol->l_exp, symbol->r_exp, " MOD ");}

  1935 void *visit(power_expression_c *symbol) {return print_binary_expression(symbol, symbol->l_exp, symbol->r_exp, " ** ");}

  1936 void *visit( power_expression_c *symbol) {return print_binary_expression(symbol, symbol->l_exp, symbol->r_exp, " ** ");}

  1936 void *visit(neg_expression_c *symbol) {return print_unary_expression(symbol, symbol->exp, "-");}

  1937 void *visit(   neg_expression_c *symbol) {return print_unary_expression (symbol, symbol->exp, "-");}

  1937 void *visit(not_expression_c *symbol) {return print_unary_expression(symbol, symbol->exp, "NOT ");}

  1938 void *visit(   not_expression_c *symbol) {return print_unary_expression (symbol, symbol->exp, "NOT ");}