diff -r 41cb5b80416e -r e1f0ebd2d9ec stage4/generate_cc/generate_cc_st.cc
--- a/stage4/generate_cc/generate_cc_st.cc	Tue Oct 23 10:35:58 2007 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,847 +0,0 @@
-/*
- * (c) 2003 Mario de Sousa
- *
- * Offered to the public under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
- * Public License for more details.
- *
- * This code is made available on the understanding that it will not be
- * used in safety-critical situations without a full and competent review.
- */
-
-/*
- * An IEC 61131-3 IL and ST compiler.
- *
- * Based on the
- * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
- *
- */
-
-
-/*
- * Conversion of st statements (i.e. ST code).
- *
- * This is part of the 4th stage that generates
- * a c++ source program equivalent to the IL and ST
- * code.
- */
-
-
-/***********************************************************************/
-/***********************************************************************/
-/***********************************************************************/
-/***********************************************************************/
-
-
-class generate_cc_st_c: public generate_cc_typedecl_c {
-
-  private:
-    /* When calling a function block, we must first find it's type,
-     * by searching through the declarations of the variables currently
-     * in scope.
-     * This class does just that...
-     * A new class is instantiated whenever we begin generating the code
-     * for a function block type declaration, or a program declaration.
-     * This object instance will then later be called while the
-     * function block's or the program's body is being handled.
-     *
-     * Note that functions cannot contain calls to function blocks,
-     * so we do not create an object instance when handling
-     * a function declaration.
-     */
-    search_fb_instance_decl_c *search_fb_instance_decl;
-
-    /* When compiling st code, it becomes necessary to determine the
-     * data type of st expressions. To do this, we must first find the
-     * st operand's declaration, within the scope of the function block
-     * or function currently being processed.
-     * The following object does just that...
-     * This object instance will then later be called while the
-     * remaining st code is being handled.
-     */
-    search_expression_type_c *search_expression_type;
-
-    search_varfb_instance_type_c *search_varfb_instance_type;
-
-  public:
-    generate_cc_st_c(stage4out_c *s4o_ptr, symbol_c *scope, const char *variable_prefix = NULL)
-    : generate_cc_typedecl_c(s4o_ptr) {
-      search_fb_instance_decl = new search_fb_instance_decl_c(scope);
-      search_expression_type = new search_expression_type_c(scope);
-      search_varfb_instance_type = new search_varfb_instance_type_c(scope);
-      this->set_variable_prefix(variable_prefix);
-    }
-
-    virtual ~generate_cc_st_c(void) {
-      delete search_fb_instance_decl;
-      delete search_expression_type;
-      delete search_varfb_instance_type;
-    }
-
-
-  private:
-    /* Some function calls in the body of functions or function blocks
-     * may leave some parameters to their default values, and
-     * ignore some output parameters of the function being called.
-     * Our conversion of ST functions to C++ does not contemplate that,
-     * i.e. each called function must get all it's input and output
-     * parameters set correctly.
-     * For input parameters we merely need to call the function with
-     * the apropriate default value, but for output parameters
-     * we must create temporary variables to hold the output value.
-     *
-     * We declare all the temporary output variables at the begining of
-     * the body of each function or function block, and use them as
-     * in function calls later on as they become necessary...
-     * Note that we cannot create these variables just before a function
-     * call, as the function call itself may be integrated within an
-     * expression, or another function call!
-     *
-     * The variables are declared in the exact same order in which they
-     * will be used later on during the function calls, which allows us
-     * to simply re-create the name that was used for the temporary variable
-     * instead of keeping it in some list.
-     * The names are recreated by the temp_var_name_factory, after reset()
-     * has been called!
-     *
-     * This function will genertae code similar to...
-     *
-     *     INT __TMP_0 = 23;
-     *     REAL __TMP_1 = 45.5;
-     *     ...
-     */
-    temp_var_name_c temp_var_name_factory;
-
-  public:
-    void generate(statement_list_c *stl) {
-      generate_cc_tempvardecl_c generate_cc_tempvardecl(&s4o);
-      generate_cc_tempvardecl.generate(stl, &temp_var_name_factory);
-      stl->accept(*this);
-    }
-
-  private:
-
-/*********************/
-/* B 1.4 - Variables */
-/*********************/
-void *visit(symbolic_variable_c *symbol) {
-  unsigned int vartype = search_varfb_instance_type->get_vartype(symbol);
-  if (vartype == search_var_instance_decl_c::external_vt || vartype == search_var_instance_decl_c::located_vt) {
-    s4o.print("*(");
-    generate_cc_base_c::visit(symbol);
-    s4o.print(")");
-  }
-  else {
-    generate_cc_base_c::visit(symbol);
-  }
-  return NULL;
-}
-
-/********************************************/
-/* B.1.4.1   Directly Represented Variables */
-/********************************************/
-// direct_variable: direct_variable_token   {$$ = new direct_variable_c($1);};
-void *visit(direct_variable_c *symbol) {
-  TRACE("direct_variable_c");
-  /* Do not use print_token() as it will change everything into uppercase */
-  if (strlen(symbol->value) == 0) ERROR;
-  s4o.print("*(");
-  this->print_variable_prefix();
-  s4o.printlocation(symbol->value + 1);
-  s4o.print(")");
-  return NULL;
-}
-
-/***************************************/
-/* B.3 - Language ST (Structured Text) */
-/***************************************/
-/***********************/
-/* B 3.1 - Expressions */
-/***********************/
-void *visit(or_expression_c *symbol) {
-  symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
-  symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
-  if (!search_expression_type->is_same_type(left_type, right_type))
-      ERROR;
-  if (search_expression_type->is_bool_type(left_type))
-    return print_binary_expression(symbol->l_exp, symbol->r_exp, " || ");
-  if (search_expression_type->is_binary_type(left_type))
-    return print_binary_expression(symbol->l_exp, symbol->r_exp, " | ");
-  ERROR;
-  return NULL;
-}
-
-void *visit(xor_expression_c *symbol) {
-  symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
-  symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
-  if (!search_expression_type->is_same_type(left_type, right_type))
-      ERROR;
-  if (search_expression_type->is_bool_type(left_type)) {
-    s4o.print("(");
-    symbol->l_exp->accept(*this);
-    s4o.print(" && !");
-    symbol->r_exp->accept(*this);
-    s4o.print(") || (!");
-    symbol->l_exp->accept(*this);
-    s4o.print(" && ");
-    symbol->r_exp->accept(*this);
-    s4o.print(")");
-  }
-  if (search_expression_type->is_binary_type(left_type))
-    return print_binary_expression(symbol->l_exp, symbol->r_exp, " ^ ");
-  ERROR;
-  return NULL;
-}
-
-void *visit(and_expression_c *symbol) {
-  symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
-  symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
-  if (!search_expression_type->is_same_type(left_type, right_type))
-      ERROR;
-  if (search_expression_type->is_bool_type(left_type))
-    return print_binary_expression(symbol->l_exp, symbol->r_exp, " && ");
-  if (search_expression_type->is_binary_type(left_type))
-    return print_binary_expression(symbol->l_exp, symbol->r_exp, " & ");
-  ERROR;
-  return NULL;
-}
-
-void *visit(equ_expression_c *symbol) {
-  symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
-  symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
-  if (!search_expression_type->is_same_type(left_type, right_type))
-      ERROR;
-  if (search_expression_type->is_time_type(left_type))
-    return print_compare_function("__eq_", left_type, symbol->l_exp, symbol->r_exp);
-  return print_binary_expression(symbol->l_exp, symbol->r_exp, " == ");
-}
-
-void *visit(notequ_expression_c *symbol) {
-  symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
-  symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
-  if (!search_expression_type->is_same_type(left_type, right_type))
-      ERROR;
-  if (search_expression_type->is_time_type(left_type))
-    return print_compare_function("__ne_", left_type, symbol->l_exp, symbol->r_exp);
-  return print_binary_expression(symbol->l_exp, symbol->r_exp, " != ");
-}
-
-void *visit(lt_expression_c *symbol) {
-  symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
-  symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
-  if (!search_expression_type->is_same_type(left_type, right_type))
-      ERROR;
-  if (search_expression_type->is_time_type(left_type))
-    return print_compare_function("__lt_", left_type, symbol->l_exp, symbol->r_exp);
-  return print_binary_expression(symbol->l_exp, symbol->r_exp, " < ");
-}
-
-void *visit(gt_expression_c *symbol) {
-  symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
-  symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
-  if (!search_expression_type->is_same_type(left_type, right_type))
-      ERROR;
-  if (search_expression_type->is_time_type(left_type))
-    return print_compare_function("__gt_", left_type, symbol->l_exp, symbol->r_exp);
-  return print_binary_expression(symbol->l_exp, symbol->r_exp, " > ");
-}
-
-void *visit(le_expression_c *symbol) {
-  symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
-  symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
-  if (!search_expression_type->is_same_type(left_type, right_type))
-      ERROR;
-  if (search_expression_type->is_time_type(left_type))
-    return print_compare_function("__le_", left_type, symbol->l_exp, symbol->r_exp);
-  return print_binary_expression(symbol->l_exp, symbol->r_exp, " <= ");
-}
-
-void *visit(ge_expression_c *symbol) {
-  symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
-  symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
-  if (!search_expression_type->is_same_type(left_type, right_type))
-      ERROR;
-  if (search_expression_type->is_time_type(left_type))
-    return print_compare_function("__ge_", left_type, symbol->l_exp, symbol->r_exp);
-  return print_binary_expression(symbol->l_exp, symbol->r_exp, " >= ");
-}
-
-void *visit(add_expression_c *symbol) {
-  symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
-	symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
-	if ((typeid(*left_type) == typeid(time_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) ||
-      (typeid(*left_type) == typeid(tod_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) ||
-      (typeid(*left_type) == typeid(dt_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)))
-    return print_binary_function("__time_add", symbol->l_exp, symbol->r_exp);
-  if (!search_expression_type->is_same_type(left_type, right_type))
-      ERROR;
-  if (search_expression_type->is_integer_type(left_type) || search_expression_type->is_real_type(left_type))
-    return print_binary_expression(symbol->l_exp, symbol->r_exp, " + ");
-  ERROR;
-  return NULL;
-}
-
-void *visit(sub_expression_c *symbol) {
-  symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
-  symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
-  if ((typeid(*left_type) == typeid(time_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) ||
-      (typeid(*left_type) == typeid(date_type_name_c) && typeid(*right_type) == typeid(date_type_name_c)) ||
-      (typeid(*left_type) == typeid(tod_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) ||
-      (typeid(*left_type) == typeid(tod_type_name_c) && typeid(*right_type) == typeid(tod_type_name_c)) ||
-      (typeid(*left_type) == typeid(dt_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) ||
-      (typeid(*left_type) == typeid(dt_type_name_c) && typeid(*right_type) == typeid(dt_type_name_c)))
-    return print_binary_function("__time_sub", symbol->l_exp, symbol->r_exp);
-  if (!search_expression_type->is_same_type(left_type, right_type))
-      ERROR;
-  if (search_expression_type->is_integer_type(left_type) || search_expression_type->is_real_type(left_type))
-    return print_binary_expression(symbol->l_exp, symbol->r_exp, " - ");
-  ERROR;
-  return NULL;
-}
-
-void *visit(mul_expression_c *symbol) {
-  symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
-  symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
-  if ((typeid(*left_type) == typeid(time_type_name_c) && search_expression_type->is_integer_type(right_type)) ||
-      (typeid(*left_type) == typeid(time_type_name_c) && search_expression_type->is_real_type(right_type)))
-    return print_binary_function("__time_mul", symbol->l_exp, symbol->r_exp);
-  if (!search_expression_type->is_same_type(left_type, right_type))
-      ERROR;
-  if (search_expression_type->is_integer_type(left_type) || search_expression_type->is_real_type(left_type))
-    return print_binary_expression(symbol->l_exp, symbol->r_exp, " * ");
-  ERROR;
-  return NULL;
-}
-
-void *visit(div_expression_c *symbol) {
-  symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
-  symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
-  if (!search_expression_type->is_same_type(left_type, right_type))
-      ERROR;
-  if (search_expression_type->is_integer_type(left_type) || search_expression_type->is_real_type(left_type))
-    return print_binary_expression(symbol->l_exp, symbol->r_exp, " / ");
-  ERROR;
-  return NULL;
-}
-
-void *visit(mod_expression_c *symbol) {
-  symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
-  symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
-  if (!search_expression_type->is_same_type(left_type, right_type))
-      ERROR;
-  if (search_expression_type->is_integer_type(left_type) || search_expression_type->is_real_type(left_type)) {
-    s4o.print("((");
-    symbol->r_exp->accept(*this);
-    s4o.print(" == 0)?0:");
-    print_binary_expression(symbol->l_exp, symbol->r_exp, " % ");
-    s4o.print(")");
-    return NULL;
-  }
-  ERROR;
-  return NULL;
-}
-
-/* TODO: power expression... */
-void *visit(power_expression_c *symbol) {ERROR; return print_binary_expression(symbol->l_exp, symbol->r_exp, " ** ");}
-void *visit(neg_expression_c *symbol) {return print_unary_expression(symbol->exp, " -");}
-
-void *visit(not_expression_c *symbol) {
-  symbol_c *exp_type = search_expression_type->get_type(symbol->exp);
-  if (!search_expression_type->is_binary_type(exp_type))
-     ERROR;
-  return print_unary_expression(symbol->exp, search_expression_type->is_bool_type(exp_type)?"!":"~");
-}
-
-void *visit(function_invocation_c *symbol) {
-  function_declaration_c *f_decl = function_symtable.find_value(symbol->function_name);
-  
-  if (f_decl == function_symtable.end_value()) {
-    /* The function called is not in the symtable, so we test if it is a
-     * standard function defined in standard */
-    
-    function_type_t current_function_type = get_function_type((identifier_c *)symbol->function_name);
-    if (current_function_type == function_none) ERROR;
-    
-    symbol_c *function_return_type = search_expression_type->get_type(symbol);
-    
-    function_call_param_iterator_c function_call_param_iterator(symbol);
-    
-    int nb_param = ((list_c *)symbol->parameter_assignment_list)->n;
-
-#include "st_code_gen.c"
-
-#if 0
-    for(int current_param = 0; current_param < nb_param; current_param++) {
-      symbol_c *param_name = NULL;
-      switch (current_function_type) {
-        case function_add:
-        case function_and:
-        case function_or:
-          param_name = generate_param_name("IN%d", current_param + 1);
-          break;
-        case function_sub:
-          if (current_param < 2)
-            param_name = generate_param_name("IN%d", current_param + 1);
-          else
-            ERROR;
-          break;
-        default: ERROR;
-      }
-      
-      /* Get the value from a foo(<param_name> = <param_value>) style call */
-      symbol_c *param_value = function_call_param_iterator.search(param_name);
-      delete param_name;
-      
-      /* Get the value from a foo(<param_value>) style call */
-      if (param_value == NULL)
-        param_value = function_call_param_iterator.next();
-      
-      if (param_value == NULL) ERROR;
-      
-      switch (current_function_type) {
-        case function_add:
-          if (search_expression_type->is_time_type(function_return_type)) {
-            if (current_param == 0) {
-              s4o.print("__time_add(");
-              param_value->accept(*this);
-            }
-            else if (current_param == 1) {
-              s4o.print(", ");
-              param_value->accept(*this);
-              s4o.print(")");
-            }
-            else ERROR;
-          }
-          else {
-            if (current_param == 0)
-              s4o.print("(");
-            else
-              s4o.print(" + ");
-            param_value->accept(*this);
-            if (current_param == nb_param - 1)
-              s4o.print(")");
-          }
-          break;
-        case function_sub:
-          if (search_expression_type->is_time_type(function_return_type)) {
-            if (current_param == 0) {
-              s4o.print("__time_sub(");
-              param_value->accept(*this);
-            }
-            else if (current_param == 1) {
-              s4o.print(", ");
-              param_value->accept(*this);
-              s4o.print(")");
-            }
-            else ERROR;
-          }
-          else {
-            if (current_param == 0) {
-              s4o.print("(");
-              param_value->accept(*this);
-            }
-            else if (current_param == 1) {
-              s4o.print(" - ");
-              param_value->accept(*this);
-              s4o.print(")");
-            }
-            else ERROR;
-          }
-          break;
-        case function_and:
-          if (current_param == 0)
-            s4o.print("(");
-          else
-            if (search_expression_type->is_bool_type(function_return_type))
-              s4o.print(" && ");
-            else
-              s4o.print(" & ");
-          param_value->accept(*this);
-          if (current_param == nb_param - 1)
-            s4o.print(")");
-          break;
-        case function_or:
-          if (current_param == 0)
-            s4o.print("(");
-          else
-            if (search_expression_type->is_bool_type(function_return_type))
-              s4o.print(" || ");
-            else
-              s4o.print(" | ");
-          param_value->accept(*this);
-          if (current_param == nb_param - 1)
-            s4o.print(")");
-          break;
-        default: ERROR;
-      }
-    } /* for(...) */
-#endif
-  }
-  else {
-    /* loop through each function parameter, find the value we should pass
-     * to it, and then output the c equivalent...
-     */
-    function_param_iterator_c fp_iterator(f_decl);
-  
-    symbol->function_name->accept(*this);
-    s4o.print("(");
-    s4o.indent_right();
-  
-    identifier_c *param_name;
-    function_call_param_iterator_c function_call_param_iterator(symbol);
-    for(int i = 1; (param_name = fp_iterator.next()) != NULL; i++) {
-      if (i != 1)
-        s4o.print(",\n"+s4o.indent_spaces);
-  
-      function_param_iterator_c::param_direction_t param_direction = fp_iterator.param_direction();
-  
-      /* Get the value from a foo(<param_name> = <param_value>) style call */
-      symbol_c *param_value = function_call_param_iterator.search(param_name);
-  
-      /* Get the value from a foo(<param_value>) style call */
-      if (param_value == NULL)
-        param_value = function_call_param_iterator.next();
-  
-      symbol_c *param_type = fp_iterator.param_type();
-      if (param_type == NULL) ERROR;
-  
-      switch (param_direction) {
-        case function_param_iterator_c::direction_in:
-          if (param_value == NULL) {
-            /* No value given for parameter, so we must use the default... */
-            /* First check whether default value specified in function declaration...*/
-            param_value = fp_iterator.default_value();
-          }
-          if (param_value == NULL) {
-            /* If not, get the default value of this variable's type */
-            param_value = (symbol_c *)param_type->accept(*type_initial_value_c::instance());
-          }
-          if (param_value == NULL) ERROR;
-          param_value->accept(*this);
-          break;
-        case function_param_iterator_c::direction_out:
-        case function_param_iterator_c::direction_inout:
-          if (param_value == NULL) {
-            /* no parameter value given, so we pass a previously declared temporary variable. */
-            std::string *temp_var_name = temp_var_name_factory.new_name();
-            s4o.print(*temp_var_name);
-            delete temp_var_name;
-          } else {
-            param_value->accept(*this);
-          }
-          break;
-        case function_param_iterator_c::direction_extref:
-          /* TODO! */
-          ERROR;
-          break;
-      } /* switch */
-    } /* for(...) */
-    // symbol->parameter_assignment->accept(*this);
-    s4o.print(")");
-    s4o.indent_left();
-  }
-
-  return NULL;
-}
-
-/********************/
-/* B 3.2 Statements */
-/********************/
-void *visit(statement_list_c *symbol) {
-  return print_list(symbol, s4o.indent_spaces, ";\n" + s4o.indent_spaces, ";\n");
-}
-
-/*********************************/
-/* B 3.2.1 Assignment Statements */
-/*********************************/
-void *visit(assignment_statement_c *symbol) {
-  symbol->l_exp->accept(*this);
-  s4o.print(" = ");
-  symbol->r_exp->accept(*this);
-  return NULL;
-}
-
-/*****************************************/
-/* B 3.2.2 Subprogram Control Statements */
-/*****************************************/
-
-/* fb_name '(' [param_assignment_list] ')' */
-/* param_assignment_list -> may be NULL ! */
-//SYM_REF2(fb_invocation_c, fb_name, param_assignment_list)
-void *visit(fb_invocation_c *symbol) {
-  TRACE("fb_invocation_c");
-  /* first figure out what is the name of the function block type of the function block being called... */
-  symbol_c *function_block_type_name = this->search_fb_instance_decl->get_type_name(symbol->fb_name);
-    /* should never occur. The function block instance MUST have been declared... */
-  if (function_block_type_name == NULL) ERROR;
-
-  /* Now find the declaration of the function block type being called... */
-  function_block_declaration_c *fb_decl = function_block_type_symtable.find_value(function_block_type_name);
-    /* should never occur. The function block type being called MUST be in the symtable... */
-  if (fb_decl == function_block_type_symtable.end_value()) ERROR;
-
-  /* loop through each function block parameter, find the value we should pass
-   * to it, and then output the c equivalent...
-   */
-  function_param_iterator_c fp_iterator(fb_decl);
-  identifier_c *param_name;
-  function_call_param_iterator_c function_call_param_iterator(symbol);
-  for(int i = 1; (param_name = fp_iterator.next()) != NULL; i++) {
-    function_param_iterator_c::param_direction_t param_direction = fp_iterator.param_direction();
-
-    /* Get the value from a foo(<param_name> = <param_value>) style call */
-    symbol_c *param_value = function_call_param_iterator.search(param_name);
-
-    /* Get the value from a foo(<param_value>) style call */
-    if (param_value == NULL)
-      param_value = function_call_param_iterator.next();
-
-    /* now output the value assignment */
-    if (param_value != NULL)
-      if ((param_direction == function_param_iterator_c::direction_in) ||
-          (param_direction == function_param_iterator_c::direction_inout)) {
-        print_variable_prefix();
-        symbol->fb_name->accept(*this);
-        s4o.print(".");
-        param_name->accept(*this);
-        s4o.print(" = ");
-        param_value->accept(*this);
-        s4o.print(";\n" + s4o.indent_spaces);
-      }
-  } /* for(...) */
-
-  /* now call the function... */
-  function_block_type_name->accept(*this);
-  s4o.print(FB_FUNCTION_SUFFIX);
-  s4o.print("(&");
-  print_variable_prefix();
-  symbol->fb_name->accept(*this);
-  s4o.print(")");
-
-  /* loop through each function parameter, find the variable to which
-   * we should atribute the value of all output or inoutput parameters.
-   */
-  fp_iterator.reset();
-  function_call_param_iterator.reset();
-  for(int i = 1; (param_name = fp_iterator.next()) != NULL; i++) {
-    function_param_iterator_c::param_direction_t param_direction = fp_iterator.param_direction();
-
-    /* Get the value from a foo(<param_name> = <param_value>) style call */
-    symbol_c *param_value = function_call_param_iterator.search(param_name);
-
-    /* Get the value from a foo(<param_value>) style call */
-    if (param_value == NULL)
-      param_value = function_call_param_iterator.next();
-
-    /* now output the value assignment */
-    if (param_value != NULL)
-      if ((param_direction == function_param_iterator_c::direction_out) ||
-          (param_direction == function_param_iterator_c::direction_inout)) {
-        s4o.print(";\n"+ s4o.indent_spaces);
-        param_value->accept(*this);
-        s4o.print(" = ");
-        print_variable_prefix();
-        symbol->fb_name->accept(*this);
-        s4o.print(".");
-        param_name->accept(*this);
-      }
-  } /* for(...) */
-
-  return NULL;
-}
-
-
-
-
-/* helper symbol for fb_invocation */
-/* param_assignment_list ',' param_assignment */
-void *visit(param_assignment_list_c *symbol) {
-  TRACE("param_assignment_list_c");
-  /* this should never be called... */
-  ERROR;
-  return NULL;
-//  return print_list(symbol, "", ", ");
-}
-
-
-void *visit(input_variable_param_assignment_c *symbol) {
-  TRACE("input_variable_param_assignment_c");
-  /* this should never be called... */
-  ERROR;
-  return NULL;
-/*
-  symbol->variable_name->accept(*this);
-  s4o.print(" = ");
-  symbol->expression->accept(*this);
-  return NULL;
-*/
-}
-
-void *visit(output_variable_param_assignment_c *symbol) {
-  TRACE("output_variable_param_assignment_c");
-  /* this should never be called... */
-  ERROR;
-  return NULL;
-/*
-  s4o.print(s4o.indent_spaces);
-  if (symbol->not_param != NULL)
-    symbol->not_param->accept(*this);
-  symbol->variable_name->accept(*this);
-  s4o.print(" => ");
-  symbol->variable->accept(*this);
-  return NULL;
-*/
-}
-
-// TODO: the NOT symbol in function (block) calls...
-void *visit(not_paramassign_c *symbol) {
-  TRACE("not_paramassign_c");
-  /* this should never be called... */
-  ERROR;
-  return NULL;
-/*
-  s4o.print("NOT ");
-  return NULL;
-*/
-}
-
-
-/********************************/
-/* B 3.2.3 Selection Statements */
-/********************************/
-void *visit(if_statement_c *symbol) {
-  s4o.print("if (");
-  symbol->expression->accept(*this);
-  s4o.print(") {\n");
-  s4o.indent_right();
-  symbol->statement_list->accept(*this);
-  s4o.indent_left();
-  symbol->elseif_statement_list->accept(*this);
-
-  if (symbol->else_statement_list != NULL) {
-    s4o.print(s4o.indent_spaces); s4o.print("} else {\n");
-    s4o.indent_right();
-    symbol->else_statement_list->accept(*this);
-    s4o.indent_left();
-  }
-  s4o.print(s4o.indent_spaces); s4o.print("}");
-  return NULL;
-}
-
-/* helper symbol for if_statement */
-void *visit(elseif_statement_list_c *symbol) {return print_list(symbol);}
-
-/* helper symbol for elseif_statement_list */
-void *visit(elseif_statement_c *symbol) {
-  s4o.print(s4o.indent_spaces); s4o.print("} else if (");
-  symbol->expression->accept(*this);
-  s4o.print(") {\n");
-  s4o.indent_right();
-  symbol->statement_list->accept(*this);
-  s4o.indent_left();
-  return NULL;
-}
-
-void *visit(case_statement_c *symbol) {
-  s4o.print("switch(");
-  symbol->expression->accept(*this);
-  s4o.print(") {\n");
-  s4o.indent_right();
-  symbol->case_element_list->accept(*this);
-  if (symbol->statement_list != NULL) {
-    s4o.print(s4o.indent_spaces + "default:\n");
-    s4o.indent_right();
-    symbol->statement_list->accept(*this);
-    s4o.print(s4o.indent_spaces + "break;\n");
-    s4o.indent_left();
-  }
-  s4o.indent_left();
-  s4o.print(s4o.indent_spaces + "}");
-  return NULL;
-}
-
-/* helper symbol for case_statement */
-void *visit(case_element_list_c *symbol) {return print_list(symbol);}
-
-void *visit(case_element_c *symbol) {
-  s4o.print(s4o.indent_spaces + "case ");
-  symbol->case_list->accept(*this);
-  s4o.print(" :\n");
-  s4o.indent_right();
-  symbol->statement_list->accept(*this);
-  s4o.print(s4o.indent_spaces + "break;\n");
-  s4o.indent_left();
-  return NULL;
-}
-
-void *visit(case_list_c *symbol) {return print_list(symbol, "", ", ");}
-
-/********************************/
-/* B 3.2.4 Iteration Statements */
-/********************************/
-void *visit(for_statement_c *symbol) {
-  s4o.print("for(");
-  symbol->control_variable->accept(*this);
-  s4o.print(" = ");
-  symbol->beg_expression->accept(*this);
-  s4o.print("; ");
-  symbol->control_variable->accept(*this);
-  s4o.print(" != ");
-  symbol->end_expression->accept(*this);
-  s4o.print("; ");
-  symbol->control_variable->accept(*this);
-  if (symbol->by_expression != NULL) {
-    s4o.print(" += ");
-    symbol->by_expression->accept(*this);
-  } else {
-    s4o.print("++");
-  }
-  s4o.print(") {\n");
-  s4o.indent_right();
-  symbol->statement_list->accept(*this);
-  s4o.indent_left();
-  s4o.print(s4o.indent_spaces); s4o.print("}");
-  return NULL;
-}
-void *visit(while_statement_c *symbol) {
-  s4o.print("while (");
-  symbol->expression->accept(*this);
-  s4o.print(") {\n");
-  s4o.indent_right();
-  symbol->statement_list->accept(*this);
-  s4o.indent_left();
-  s4o.print(s4o.indent_spaces); s4o.print("}");
-  return NULL;
-}
-void *visit(repeat_statement_c *symbol) {
-  s4o.print("do {\n");
-  s4o.indent_right();
-  symbol->statement_list->accept(*this);
-  s4o.indent_left();
-  s4o.print(s4o.indent_spaces); s4o.print("} while(");
-  symbol->expression->accept(*this);
-  s4o.print(")");
-  return NULL;
-}
-void *visit(exit_statement_c *symbol) {
-  s4o.print("exit(0)");
-  return NULL;
-}
-
-
-
-}; /* generate_cc_st_c */
-
-
-
-
-
-
-
-
-