stage3/remove_forward_dependencies.cc
author mjsousa
Wed, 15 Apr 2015 23:25:07 +0100
changeset 999 dd50a82ae8da
parent 971 8aee27d46208
child 1041 56ebe2a31b5b
permissions -rw-r--r--
transform CASE into if()..else if().. -> fixes 2 bugs (1)case within case statements, and (2)repeated elements in case options
959
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
     1
/*
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
     2
 *  matiec - a compiler for the programming languages defined in IEC 61131-3
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
     3
 *
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
     4
 *  Copyright (C) 2014  Mario de Sousa (msousa@fe.up.pt)
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
     5
 *
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
     6
 *  This program is free software: you can redistribute it and/or modify
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
     7
 *  it under the terms of the GNU General Public License as published by
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
     8
 *  the Free Software Foundation, either version 3 of the License, or
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
     9
 *  (at your option) any later version.
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    10
 *
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    11
 *  This program is distributed in the hope that it will be useful,
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    12
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    13
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    14
 *  GNU General Public License for more details.
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    15
 *
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    16
 *  You should have received a copy of the GNU General Public License
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    17
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    18
 *
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    19
 *
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    20
 * This code is made available on the understanding that it will not be
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    21
 * used in safety-critical situations without a full and competent review.
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    22
 */
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    23
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    24
/*
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    25
 * An IEC 61131-3 compiler.
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    26
 *
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    27
 * Based on the
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    28
 * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    29
 *
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    30
 */
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    31
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    32
/*
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    33
 * Re-oder the POUs in te library so that no forward references occur.
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    34
 * 
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    35
 * Since stage1_2 now suppport POUs that contain references to POUS that are only declared later,
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    36
 * (e.g. a variable of FB1_t is declared, before the FB1_T function block is itself declared!)
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    37
 * we may need to re-order all the POUs in the library so that these forward references do not occur.
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    38
 * 
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    39
 * This utility function will do just that. However, it does not destroy the original abstract syntax 
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    40
 * tree (AST). It instead creates a new re-ordered AST, by instantiating a new library_c object.
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    41
 * This new library_c object will however point to the *same* objects of the original AST, just in 
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    42
 * a new order. 
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    43
 * This means that the new and original AST share all the object instances, and only use a distinct
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    44
 * library_c object!
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    45
 */
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    46
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    47
#include "remove_forward_dependencies.hh"
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    48
#include "../main.hh" // required for ERROR() and ERROR_MSG() macros.
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    49
#include "../absyntax_utils/absyntax_utils.hh"
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    50
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    51
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    52
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    53
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    54
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    55
#define FIRST_(symbol1, symbol2) (((symbol1)->first_order < (symbol2)->first_order)   ? (symbol1) : (symbol2))
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    56
#define  LAST_(symbol1, symbol2) (((symbol1)->last_order  > (symbol2)->last_order)    ? (symbol1) : (symbol2))
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    57
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    58
#define FIRST_(symbol1, symbol2) (((symbol1)->first_order < (symbol2)->first_order)   ? (symbol1) : (symbol2))
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    59
#define  LAST_(symbol1, symbol2) (((symbol1)->last_order  > (symbol2)->last_order)    ? (symbol1) : (symbol2))
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    60
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    61
#define STAGE3_ERROR(error_level, symbol1, symbol2, ...) {                                                                  \
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    62
  if (current_display_error_level >= error_level) {                                                                         \
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    63
    fprintf(stderr, "%s:%d-%d..%d-%d: error: ",                                                                             \
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    64
            FIRST_(symbol1,symbol2)->first_file, FIRST_(symbol1,symbol2)->first_line, FIRST_(symbol1,symbol2)->first_column,\
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    65
                                                 LAST_(symbol1,symbol2) ->last_line,  LAST_(symbol1,symbol2) ->last_column);\
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    66
    fprintf(stderr, __VA_ARGS__);                                                                                           \
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    67
    fprintf(stderr, "\n");                                                                                                  \
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    68
    error_count++;                                                                                                     \
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    69
  }                                                                                                                         \
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    70
}
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    71
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    72
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    73
#define STAGE3_WARNING(symbol1, symbol2, ...) {                                                                             \
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    74
    fprintf(stderr, "%s:%d-%d..%d-%d: warning: ",                                                                           \
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    75
            FIRST_(symbol1,symbol2)->first_file, FIRST_(symbol1,symbol2)->first_line, FIRST_(symbol1,symbol2)->first_column,\
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    76
                                                 LAST_(symbol1,symbol2) ->last_line,  LAST_(symbol1,symbol2) ->last_column);\
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    77
    fprintf(stderr, __VA_ARGS__);                                                                                           \
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    78
    fprintf(stderr, "\n");                                                                                                  \
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    79
    warning_found = true;                                                                                                   \
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    80
}
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    81
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    82
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    83
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    84
/* NOTE: We create an independent visitor for this task instead of having this done by the remove_forward_dependencies_c
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    85
 *       because we do not want to handle the ***_pragma_c classes while doing this search.
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    86
 *      (remove_forward_dependencies_c needs to visit those classes when handling all the possible entries in
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    87
 *       library_c, and must have those visitors)
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    88
 * 
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    89
 * NOTE:
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    90
 *      This class could have been written by visiting all the AST objects that could _reference_ a
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    91
 *          - FB type
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    92
 *          - Program type
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    93
 *          - Function type
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    94
 *      and by checking whether those references are in the declared_identifiers list.
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    95
 *      However, one of those objects, the ref_spec_c, may reference an FB type, or any other datatype, so we must have a way
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    96
 *      of knowing what is being referenced in this case. I have opted to introduce a new object type in the AST, the
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    97
 *      poutype_identifier_c, that will be used anywhere in the AST that references either a PROGRAM name or a FB type name
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    98
 *      or a FUNCTION name (previously a simple identifier_c was used!).
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
    99
 *      This means that we merely need to visit the new poutype_identifier_c object in this visitor.
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   100
 */
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   101
class find_forward_dependencies_c: public search_visitor_c {
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   102
  private:
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   103
    identifiers_symbtable_t *declared_identifiers; // list of identifiers already declared by the symbols in the new tree
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   104
  public:
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   105
    find_forward_dependencies_c(identifiers_symbtable_t *declared_identifiers_) {declared_identifiers = declared_identifiers_;}
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   106
  /*******************************************/
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   107
  /* B 1.1 - Letters, digits and identifiers */
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   108
  /*******************************************/
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   109
  // return NULL if the symbol is already in the declared_identifiers symbol table, otherwise return the missing symbol!
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   110
  void *visit(            poutype_identifier_c *symbol)
971
8aee27d46208 Change symbtable_c -> use design pattern used by C++ standard library (STL)
mjsousa
parents: 959
diff changeset
   111
    {if (declared_identifiers->find(symbol) != declared_identifiers->end()) return NULL; else return symbol;}
959
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   112
};   /* class find_forward_dependencies_c */
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   113
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   114
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   115
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   116
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   117
/* A class to count the number of POUs (Function, FBs Programs and Configurations) in a library.
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   118
 * This will be used to make sure whether we have copied all the POUs from the original AST (abstract
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   119
 * syntax tree) to the new AST.
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   120
 * Note that we can't simply use the number of 'elements' in the AST, as it may contain unknown/unsupported pragmas.
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   121
 */
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   122
class pou_count_c: public search_visitor_c {
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   123
  private:
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   124
    static pou_count_c *singleton;
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   125
    long long int count;
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   126
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   127
  public:
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   128
    static long long int get_count(library_c *library) {
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   129
      if (NULL == singleton) singleton = new pou_count_c;
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   130
      if (NULL == singleton) ERROR;
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   131
      singleton->count = 0;
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   132
      library->accept(*singleton);
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   133
      return singleton->count;
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   134
    }
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   135
    
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   136
    /**************************************/
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   137
    /* B.1.5 - Program organization units */
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   138
    /**************************************/
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   139
    void *visit(      function_declaration_c *symbol) {count++; return NULL;}
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   140
    void *visit(function_block_declaration_c *symbol) {count++; return NULL;} 
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   141
    void *visit(       program_declaration_c *symbol) {count++; return NULL;} 
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   142
    void *visit( configuration_declaration_c *symbol) {count++; return NULL;} 
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   143
};   /* class pou_count_c */
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   144
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   145
pou_count_c *pou_count_c::singleton = NULL;
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   146
symbol_c remove_forward_dependencies_c_null_symbol;
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   147
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   148
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   149
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   150
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   151
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   152
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   153
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   154
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   155
/************************************************************/
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   156
/************************************************************/
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   157
/******   The main class: Remove Forward Depencies    *******/
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   158
/************************************************************/
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   159
/************************************************************/
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   160
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   161
// constructor & destructor
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   162
remove_forward_dependencies_c:: remove_forward_dependencies_c(void) {
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   163
  find_forward_dependencies      = new find_forward_dependencies_c(&declared_identifiers);
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   164
  current_display_error_level = error_level_default;
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   165
  error_count = 0;
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   166
}
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   167
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   168
remove_forward_dependencies_c::~remove_forward_dependencies_c(void) {
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   169
  delete find_forward_dependencies;
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   170
}
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   171
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   172
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   173
int remove_forward_dependencies_c::get_error_count(void) {
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   174
  return error_count;
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   175
}
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   176
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   177
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   178
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   179
library_c *remove_forward_dependencies_c::create_new_tree(symbol_c *tree) {
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   180
  library_c *old_tree = dynamic_cast<library_c *>(tree);
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   181
  if (NULL == old_tree) ERROR;
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   182
  new_tree = new library_c;
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   183
  *((symbol_c *)new_tree) = *((symbol_c *)tree); // copy any annotations from tree to new_tree;
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   184
  new_tree->clear(); // remove all elements from list.
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   185
  tree->accept(*this);
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   186
  return new_tree;
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   187
}
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   188
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   189
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   190
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   191
void *remove_forward_dependencies_c::handle_library_symbol(symbol_c *symbol, symbol_c *name, symbol_c *search1, symbol_c *search2, symbol_c *search3) {
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   192
  if (inserted_symbols.find(symbol) != inserted_symbols.end())                 return NULL; // already previously inserted into new_tree and declared_identifiers. Do not handle again!
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   193
  if ((search1 != NULL) && (search1->accept(*find_forward_dependencies) != NULL)) return NULL; // A forward depency has not yet been satisfied. Wait for a later iteration to try again! 
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   194
  if ((search2 != NULL) && (search2->accept(*find_forward_dependencies) != NULL)) return NULL; // A forward depency has not yet been satisfied. Wait for a later iteration to try again!
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   195
  if ((search3 != NULL) && (search3->accept(*find_forward_dependencies) != NULL)) return NULL; // A forward depency has not yet been satisfied. Wait for a later iteration to try again!
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   196
  /* no forward dependencies found => insert into new AST, and add to the 'defined identifiers' and 'inserted symbol' lists */
971
8aee27d46208 Change symbtable_c -> use design pattern used by C++ standard library (STL)
mjsousa
parents: 959
diff changeset
   197
  if (declared_identifiers.find(name) == declared_identifiers.end())
959
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   198
      declared_identifiers.insert(name, NULL);  // only add if not yet in the symbol table (an overloaded version of this same POU could have been inderted previously!)
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   199
  inserted_symbols.insert(symbol);
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   200
  new_tree->add_element(current_code_generation_pragma);  
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   201
  new_tree->add_element(symbol);  
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   202
  return NULL;
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   203
}
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   204
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   205
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   206
/* Tell the user that the source code contains a circular dependency */
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   207
void remove_forward_dependencies_c::print_circ_error(library_c *symbol) {
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   208
  /* Note that we only print Functions and FBs, as Programs and Configurations cannot contain circular references due to syntax rules */
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   209
  /* Note too that circular references in derived datatypes is also not possible due to sytax!                                        */
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   210
  int initial_error_count = error_count;
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   211
  for (int i = 0; i < symbol->n; i++) 
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   212
    if (   (inserted_symbols.find(symbol->elements[i]) == inserted_symbols.end())            // if not copied to new AST
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   213
        &&(  (NULL != dynamic_cast <function_block_declaration_c *>(symbol->elements[i]))    // and (is a FB  
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   214
           ||(NULL != dynamic_cast <      function_declaration_c *>(symbol->elements[i]))))  //      or a Function)
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   215
      STAGE3_ERROR(0, symbol->elements[i], symbol->elements[i], "POU (%s) contains a self-reference and/or belongs in a circular referencing loop", get_datatype_info_c::get_id_str(symbol->elements[i]));
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   216
  if (error_count == initial_error_count) ERROR; // We were unable to determine which POUs contain the circular references!!
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   217
}
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   218
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   219
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   220
/***************************/
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   221
/* B 0 - Programming Model */
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   222
/***************************/
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   223
/* enumvalue_symtable is filled in by enum_declaration_check_c, during stage3 semantic verification, with a list of all enumerated constants declared inside this POU */
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   224
// SYM_LIST(library_c, enumvalue_symtable_t enumvalue_symtable;)
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   225
void *remove_forward_dependencies_c::visit(library_c *symbol) {
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   226
  /* this method is the expected entry point for this visitor, and implements the main algorithm of the visitor */
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   227
  
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   228
  /* first insert all the derived datatype declarations, in the same order by which they are delcared in the original AST */
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   229
  /* Since IEC 61131-3 does not allow FBs in arrays or structures, it is actually safe to place all the datatypes before all the POUs! */
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   230
  for (int i = 0; i < symbol->n; i++) 
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   231
    if (NULL != dynamic_cast <data_type_declaration_c *>(symbol->elements[i]))
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   232
      new_tree->add_element(symbol->elements[i]);  
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   233
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   234
  /* now do the POUs, in whatever order is necessary to guarantee no forward references. */    
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   235
  long long int old_tree_pou_count = pou_count_c::get_count(symbol);
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   236
    // if no code generation pragma exists before the first entry in the library, the default is to enable code generation.
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   237
  enable_code_generation_pragma_c *default_code_generation_pragma = new enable_code_generation_pragma_c; 
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   238
  int prev_n;
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   239
  cycle_count = 0;
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   240
  do {
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   241
    cycle_count++;
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   242
    prev_n = new_tree->n;
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   243
    current_code_generation_pragma = default_code_generation_pragma;
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   244
    for (int i = 0; i < symbol->n; i++)  symbol->elements[i]->accept(*this);
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   245
  } while (prev_n != new_tree->n); // repeat while new elementns are still being added to the new AST
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   246
  
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   247
  if (old_tree_pou_count != pou_count_c::get_count(new_tree)) 
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   248
    print_circ_error(symbol);
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   249
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   250
  return NULL;
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   251
}
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   252
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   253
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   254
/**************************************/
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   255
/* B.1.5 - Program organization units */
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   256
/**************************************/
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   257
/***********************/
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   258
/* B 1.5.1 - Functions */
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   259
/***********************/
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   260
// SYM_REF4(function_declaration_c, derived_function_name, type_name, var_declarations_list, function_body, enumvalue_symtable_t enumvalue_symtable;)
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   261
void *remove_forward_dependencies_c::visit(function_declaration_c *symbol) 
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   262
  {return handle_library_symbol(symbol, symbol->derived_function_name, symbol->type_name, symbol->var_declarations_list, symbol->function_body);}
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   263
/*****************************/
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   264
/* B 1.5.2 - Function Blocks */
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   265
/*****************************/
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   266
/*  FUNCTION_BLOCK derived_function_block_name io_OR_other_var_declarations function_block_body END_FUNCTION_BLOCK */
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   267
// SYM_REF3(function_block_declaration_c, fblock_name, var_declarations, fblock_body, enumvalue_symtable_t enumvalue_symtable;)
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   268
void *remove_forward_dependencies_c::visit(function_block_declaration_c *symbol) 
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   269
  {return handle_library_symbol(symbol, symbol->fblock_name, symbol->var_declarations, symbol->fblock_body);}
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   270
/**********************/
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   271
/* B 1.5.3 - Programs */
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   272
/**********************/
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   273
/*  PROGRAM program_type_name program_var_declarations_list function_block_body END_PROGRAM */
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   274
// SYM_REF3(program_declaration_c, program_type_name, var_declarations, function_block_body, enumvalue_symtable_t enumvalue_symtable;)
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   275
void *remove_forward_dependencies_c::visit(program_declaration_c *symbol) 
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   276
  {return handle_library_symbol(symbol, symbol->program_type_name, symbol->var_declarations, symbol->function_block_body);}
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   277
/********************************/
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   278
/* B 1.7 Configuration elements */
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   279
/********************************/
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   280
/* CONFIGURATION configuration_name (...) END_CONFIGURATION */
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   281
// SYM_REF5(configuration_declaration_c, configuration_name, global_var_declarations, resource_declarations, access_declarations, instance_specific_initializations, enumvalue_symtable_t enumvalue_symtable;)
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   282
void *remove_forward_dependencies_c::visit(configuration_declaration_c *symbol) 
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   283
  {return handle_library_symbol(symbol, symbol->configuration_name, symbol->global_var_declarations, symbol->resource_declarations, symbol->access_declarations);}
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   284
/********************/
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   285
/* 2.1.6 - Pragmas  */
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   286
/********************/
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   287
void *remove_forward_dependencies_c::visit(disable_code_generation_pragma_c *symbol) {current_code_generation_pragma = symbol; return NULL;}
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   288
void *remove_forward_dependencies_c::visit( enable_code_generation_pragma_c *symbol) {current_code_generation_pragma = symbol; return NULL;}
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   289
/* I have no ideia what this pragma is. Where should we place it in the re-ordered tree? 
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   290
 * Without knowing the semantics of the pragma, it is not possible to hande it correctly.
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   291
 * We therefore print out an error message, and abort!
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   292
 */
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   293
// TODO: print error message!
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   294
void *remove_forward_dependencies_c::visit(pragma_c *symbol) {
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   295
  if (1 != cycle_count) return NULL; // only handle unknown pragmas in the first cycle!
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   296
  STAGE3_WARNING(symbol, symbol, "Unrecognized pragma. Including the pragma when using the '-p' command line option for 'allow use of forward references' may result in unwanted behaviour.");
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   297
  new_tree->add_element(symbol);
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   298
  return NULL;
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   299
}
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   300
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   301
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   302
8bfcc8e62bd6 Fix C code generation when forward references (-p command line option) is on.
mjsousa
parents:
diff changeset
   303