1 /*

     2  *  matiec - a compiler for the programming languages defined in IEC 61131-3

     3  *

     4  *  Copyright (C) 2009-2011  Mario de Sousa (msousa@fe.up.pt)

     5  *  Copyright (C) 2011-2012  Manuele Conti (manuele.conti@sirius-es.it)

     6  *  Copyright (C) 2011-2012  Matteo Facchinetti (matteo.facchinetti@sirius-es.it)

     7  *

     8  *

     9  *  This program is free software: you can redistribute it and/or modify

    10  *  it under the terms of the GNU General Public License as published by

    11  *  the Free Software Foundation, either version 3 of the License, or

    12  *  (at your option) any later version.

    13  *

    14  *  This program is distributed in the hope that it will be useful,

    15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of

    16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    17  *  GNU General Public License for more details.

    18  *

    19  *  You should have received a copy of the GNU General Public License

    20  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.

    21  *

    22  *

    23  * This code is made available on the understanding that it will not be

    24  * used in safety-critical situations without a full and competent review.

    25  */

    26 

    27 /*

    28  * An IEC 61131-3 compiler.

    29  *

    30  * Based on the

    31  * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)

    32  *

    33  */

    34 

    35 

    36 #include "../absyntax_utils/absyntax_utils.hh"

    37 

    38 class print_datatypes_error_c: public iterator_visitor_c {

    39 

    40   private:

    41     search_varfb_instance_type_c *search_varfb_instance_type;

    42     search_base_type_c search_base_type;

    43     /* When calling a function block, we must first find it's type,

    44      * by searching through the declarations of the variables currently

    45      * in scope.

    46      * This class does just that...

    47      * A new object instance is instantiated whenever we start checking semantics

    48      * for a function block type declaration, or a program declaration.

    49      * This object instance will then later be called while the

    50      * function block's or the program's body is being handled.

    51      *

    52      * Note that functions cannot contain calls to function blocks,

    53      * so we do not create an object instance when handling

    54      * a function declaration.

    55      */

    56 

    57     /* In IL code, once we find a type mismatch error, it is best to

    58      * ignore any further errors until the end of the logical operation,

    59      * i.e. until the next LD.

    60      * However, we cannot clear the il_error flag on all LD operations,

    61      * as these may also be used within parenthesis. LD operations

    62      * within parenthesis may not clear the error flag.

    63      * We therefore need a counter to know how deep inside a parenthesis

    64      * structure we are.

    65      */

    66     int  il_parenthesis_level;

    67     bool il_error;

    68     bool error_found;

    69 

    70     /* the current data type of the data stored in the IL stack, i.e. the default variable */

    71     symbol_c *prev_il_instruction;

    72     /* the current IL operand being analyzed - its symbol and its data type */

    73     symbol_c *il_operand_type;

    74     symbol_c *il_operand;

    75 

    76 

    77   public:

    78     print_datatypes_error_c(symbol_c *ignore);

    79     virtual ~print_datatypes_error_c(void);

    80     int get_error_found();

    81 

    82     /* a helper function... */

    83     symbol_c *base_type(symbol_c *symbol);

    84 

    85     /*********************/

    86     /* B 1.2 - Constants */

    87     /*********************/

    88     /******************************/

    89     /* B 1.2.1 - Numeric Literals */

    90     /******************************/

    91     void *visit(real_c *symbol);

    92     void *visit(integer_c *symbol);

    93     void *visit(neg_real_c *symbol);

    94     void *visit(neg_integer_c *symbol);

    95     void *visit(binary_integer_c *symbol);

    96     void *visit(octal_integer_c *symbol);

    97     void *visit(hex_integer_c *symbol);

    98     void *visit(integer_literal_c *symbol);

    99     void *visit(real_literal_c *symbol);

   100     void *visit(bit_string_literal_c *symbol);

   101     void *visit(boolean_literal_c *symbol);

   102     void *visit(boolean_true_c *symbol);

   103     void *visit(boolean_false_c *symbol);

   104 

   105     /*******************************/

   106     /* B.1.2.2   Character Strings */

   107     /*******************************/

   108     void *visit(double_byte_character_string_c *symbol);

   109     void *visit(single_byte_character_string_c *symbol);

   110 

   111     /***************************/

   112     /* B 1.2.3 - Time Literals */

   113     /***************************/

   114     /************************/

   115     /* B 1.2.3.1 - Duration */

   116     /************************/

   117     void *visit(duration_c *symbol);

   118 

   119     /************************************/

   120     /* B 1.2.3.2 - Time of day and Date */

   121     /************************************/

   122     void *visit(time_of_day_c *symbol);

   123     void *visit(date_c *symbol);

   124     void *visit(date_and_time_c *symbol);

   125 

   126     /**********************/

   127     /* B 1.3 - Data types */

   128     /**********************/

   129     /********************************/

   130     /* B 1.3.3 - Derived data types */

   131     /********************************/

   132     void *visit(data_type_declaration_c *symbol);

   133     void *visit(enumerated_value_c *symbol);

   134 

   135     /*********************/

   136     /* B 1.4 - Variables */

   137     /*********************/

   138     void *visit(symbolic_variable_c *symbol);

   139 

   140     /********************************************/

   141     /* B 1.4.1 - Directly Represented Variables */

   142     /********************************************/

   143     void *visit(direct_variable_c *symbol);

   144 

   145     /*************************************/

   146     /* B 1.4.2 - Multi-element variables */

   147     /*************************************/

   148     void *visit(array_variable_c *symbol);

   149     void *visit(structured_variable_c *symbol);

   150 

   151     /**************************************/

   152     /* B 1.5 - Program organization units */

   153     /**************************************/

   154     /***********************/

   155     /* B 1.5.1 - Functions */

   156     /***********************/

   157     void *visit(function_declaration_c *symbol);

   158 

   159     /*****************************/

   160     /* B 1.5.2 - Function blocks */

   161     /*****************************/

   162     void *visit(function_block_declaration_c *symbol);

   163 

   164     /**********************/

   165     /* B 1.5.3 - Programs */

   166     /**********************/

   167     void *visit(program_declaration_c *symbol);

   168 

   169     /********************************/

   170     /* B 1.7 Configuration elements */

   171     /********************************/

   172     void *visit(configuration_declaration_c *symbol);

   173 

   174     /****************************************/

   175     /* B.2 - Language IL (Instruction List) */

   176     /****************************************/

   177     /***********************************/

   178     /* B 2.1 Instructions and Operands */

   179     /***********************************/

   180     // void *visit(instruction_list_c *symbol);

   181     void *visit(il_simple_operation_c *symbol);

   182     void *visit(il_function_call_c *symbol);

   183     void *visit(il_expression_c *symbol);

   184     void *visit(il_fb_call_c *symbol);

   185     void *visit(il_formal_funct_call_c *symbol);

   186     /*

   187         void *visit(il_operand_list_c *symbol);

   188         void *visit(simple_instr_list_c *symbol);

   189         void *visit(il_param_list_c *symbol);

   190         void *visit(il_param_assignment_c *symbol);

   191         void *visit(il_param_out_assignment_c *symbol);

   192      */

   193 

   194     /*******************/

   195     /* B 2.2 Operators */

   196     /*******************/

   197     void *visit(LD_operator_c *symbol);

   198     void *visit(LDN_operator_c *symbol);

   199     void *visit(ST_operator_c *symbol);

   200     void *visit(STN_operator_c *symbol);

   201     void *visit(NOT_operator_c *symbol);

   202     void *visit(S_operator_c *symbol);

   203     void *visit(R_operator_c *symbol);

   204     void *visit(S1_operator_c *symbol);

   205     void *visit(R1_operator_c *symbol);

   206     void *visit(CLK_operator_c *symbol);

   207     void *visit(CU_operator_c *symbol);

   208     void *visit(CD_operator_c *symbol);

   209     void *visit(PV_operator_c *symbol);

   210     void *visit(IN_operator_c *symbol);

   211     void *visit(PT_operator_c *symbol);

   212     void *visit(AND_operator_c *symbol);

   213     void *visit(OR_operator_c *symbol);

   214     void *visit(XOR_operator_c *symbol);

   215     void *visit(ANDN_operator_c *symbol);

   216     void *visit(ORN_operator_c *symbol);

   217     void *visit(XORN_operator_c *symbol);

   218     void *visit(ADD_operator_c *symbol);

   219     void *visit(SUB_operator_c *symbol);

   220     void *visit(MUL_operator_c *symbol);

   221     void *visit(DIV_operator_c *symbol);

   222     void *visit(MOD_operator_c *symbol);

   223     void *visit(GT_operator_c *symbol);

   224     void *visit(GE_operator_c *symbol);

   225     void *visit(EQ_operator_c *symbol);

   226     void *visit(LT_operator_c *symbol);

   227     void *visit(LE_operator_c *symbol);

   228     void *visit(NE_operator_c *symbol);

   229     void *visit(CAL_operator_c *symbol);

   230     void *visit(CALC_operator_c *symbol);

   231     void *visit(CALCN_operator_c *symbol);

   232     void *visit(RET_operator_c *symbol);

   233     void *visit(RETC_operator_c *symbol);

   234     void *visit(RETCN_operator_c *symbol);

   235     void *visit(JMP_operator_c *symbol);

   236     void *visit(JMPC_operator_c *symbol);

   237     void *visit(JMPCN_operator_c *symbol);

   238     /* Symbol class handled together with function call checks */

   239     // void *visit(il_assign_operator_c *symbol, variable_name);

   240     /* Symbol class handled together with function call checks */

   241     // void *visit(il_assign_operator_c *symbol, option, variable_name);

   242 

   243     /***************************************/

   244     /* B.3 - Language ST (Structured Text) */

   245     /***************************************/

   246     /***********************/

   247     /* B 3.1 - Expressions */

   248     /***********************/

   249     void *visit(or_expression_c *symbol);

   250     void *visit(xor_expression_c *symbol);

   251     void *visit(and_expression_c *symbol);

   252     void *visit(equ_expression_c *symbol);

   253     void *visit(notequ_expression_c *symbol);

   254     void *visit(lt_expression_c *symbol);

   255     void *visit(gt_expression_c *symbol);

   256     void *visit(le_expression_c *symbol);

   257     void *visit(ge_expression_c *symbol);

   258     void *visit(add_expression_c *symbol);

   259     void *visit(sub_expression_c *symbol);

   260     void *visit(mul_expression_c *symbol);

   261     void *visit(div_expression_c *symbol);

   262     void *visit(mod_expression_c *symbol);

   263     void *visit(power_expression_c *symbol);

   264     void *visit(neg_expression_c *symbol);

   265     void *visit(not_expression_c *symbol);

   266     void *visit(function_invocation_c *symbol);

   267 

   268     /*********************************/

   269     /* B 3.2.1 Assignment Statements */

   270     /*********************************/

   271     void *visit(assignment_statement_c *symbol);

   272 

   273     /*****************************************/

   274     /* B 3.2.2 Subprogram Control Statements */

   275     /*****************************************/

   276     //void *visit(fb_invocation_c *symbol);

   277 

   278     /********************************/

   279     /* B 3.2.3 Selection Statements */

   280     /********************************/

   281     void *visit(if_statement_c *symbol);

   282     //     void *visit(elseif_statement_list_c *symbol);

   283     void *visit(elseif_statement_c *symbol);

   284     void *visit(case_statement_c *symbol);

   285     //     void *visit(case_element_list_c *symbol);

   286     //     void *visit(case_element_c *symbol);

   287     // void *visit(case_list_c *symbol);

   288 

   289     /********************************/

   290     /* B 3.2.4 Iteration Statements */

   291     /********************************/

   292     void *visit(for_statement_c *symbol);

   293     void *visit(while_statement_c *symbol);

   294     void *visit(repeat_statement_c *symbol);

   295 

   296 }; // print_datatypes_error_c

   297 

   298 

   299 

   300 

   301 

   302 

   303