--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/stage3/fill_candidate_datatypes.hh Wed Feb 01 19:49:11 2012 +0000
@@ -0,0 +1,320 @@
+/*
+ * matiec - a compiler for the programming languages defined in IEC 61131-3
+ *
+ * Copyright (C) 2009-2012 Mario de Sousa (msousa@fe.up.pt)
+ * Copyright (C) 2012 Manuele Conti (manuele.conti@sirius-es.it)
+ * Copyright (C) 2012 Matteo Facchinetti (matteo.facchinetti@sirius-es.it)
+ *
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ *
+ * 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 compiler.
+ *
+ * Based on the
+ * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
+ *
+ */
+
+
+#include "../absyntax_utils/absyntax_utils.hh"
+
+class fill_candidate_datatypes_c: public iterator_visitor_c {
+
+ private:
+ search_varfb_instance_type_c *search_varfb_instance_type;
+ search_base_type_c search_base_type;
+ /* 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 object instance is instantiated whenever we start checking semantics
+ * 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_var_instance_decl_c *search_var_instance_decl;
+
+ /* This variable was created to pass information from
+ * fill_candidate_datatypes_c::visit(case_statement_c *symbol) function to
+ * fill_candidate_datatypes_c::visit(case_list_c *symbol) function.
+ */
+ symbol_c *case_expression_type;
+
+ /* In IL code, once we find a type mismatch error, it is best to
+ * ignore any further errors until the end of the logical operation,
+ * i.e. until the next LD.
+ * However, we cannot clear the il_error flag on all LD operations,
+ * as these may also be used within parenthesis. LD operations
+ * within parenthesis may not clear the error flag.
+ * We therefore need a counter to know how deep inside a parenthesis
+ * structure we are.
+ */
+ int il_parenthesis_level;
+ bool error_found;
+
+ /* the current data type of the data stored in the IL stack, i.e. the default variable */
+ symbol_c *prev_il_instruction;
+ /* the current IL operand being analyzed - its symbol and its data type */
+ symbol_c *il_operand_type;
+ symbol_c *il_operand;
+ symbol_c *widening_conversion(symbol_c *left_type, symbol_c *right_type, const struct widen_entry widen_table[]);
+
+ public:
+ fill_candidate_datatypes_c(symbol_c *ignore);
+ virtual ~fill_candidate_datatypes_c(void);
+
+ /* Match a function declaration with a function call through their parameters.*/
+ void match_nonformal_call(symbol_c *f_call, symbol_c *f_decl, int *error_count = NULL);
+ void match_formal_call(symbol_c *f_call, symbol_c *f_decl, int *error_count = NULL);
+
+ void *compute_standard_function_default(function_invocation_c *st_symbol, il_formal_funct_call_c *il_symbol);
+ void *compute_standard_function_il(il_function_call_c *symbol, symbol_c *param_data_type);
+
+ /* a helper function... */
+ symbol_c *base_type(symbol_c *symbol);
+
+ /*********************/
+ /* B 1.2 - Constants */
+ /*********************/
+ /******************************/
+ /* B 1.2.1 - Numeric Literals */
+ /******************************/
+ void *visit(real_c *symbol);
+ void *visit(integer_c *symbol);
+ void *visit(neg_real_c *symbol);
+ void *visit(neg_integer_c *symbol);
+ void *visit(binary_integer_c *symbol);
+ void *visit(octal_integer_c *symbol);
+ void *visit(hex_integer_c *symbol);
+ void *visit(integer_literal_c *symbol);
+ void *visit(real_literal_c *symbol);
+ void *visit(bit_string_literal_c *symbol);
+ void *visit(boolean_literal_c *symbol);
+ void *visit(boolean_true_c *symbol);
+ void *visit(boolean_false_c *symbol);
+
+ /*******************************/
+ /* B.1.2.2 Character Strings */
+ /*******************************/
+ void *visit(double_byte_character_string_c *symbol);
+ void *visit(single_byte_character_string_c *symbol);
+
+ /***************************/
+ /* B 1.2.3 - Time Literals */
+ /***************************/
+ /************************/
+ /* B 1.2.3.1 - Duration */
+ /************************/
+ void *visit(duration_c *symbol);
+
+ /************************************/
+ /* B 1.2.3.2 - Time of day and Date */
+ /************************************/
+ void *visit(time_of_day_c *symbol);
+ void *visit(date_c *symbol);
+ void *visit(date_and_time_c *symbol);
+
+
+ /**********************/
+ /* B 1.3 - Data types */
+ /**********************/
+ /********************************/
+ /* B 1.3.3 - Derived data types */
+ /********************************/
+ void *visit(subrange_c *symbol);
+ void *visit(data_type_declaration_c *symbol);
+ void *visit(enumerated_value_c *symbol);
+
+ /*********************/
+ /* B 1.4 - Variables */
+ /*********************/
+ void *visit(symbolic_variable_c *symbol);
+
+ /********************************************/
+ /* B 1.4.1 - Directly Represented Variables */
+ /********************************************/
+ void *visit(direct_variable_c *symbol);
+
+ /*************************************/
+ /* B 1.4.2 - Multi-element variables */
+ /*************************************/
+ void *visit(array_variable_c *symbol);
+ void *visit(structured_variable_c *symbol);
+
+ /**************************************/
+ /* B 1.5 - Program organization units */
+ /**************************************/
+ /***********************/
+ /* B 1.5.1 - Functions */
+ /***********************/
+ void *visit(function_declaration_c *symbol);
+
+ /*****************************/
+ /* B 1.5.2 - Function blocks */
+ /*****************************/
+ void *visit(function_block_declaration_c *symbol);
+
+ /**********************/
+ /* B 1.5.3 - Programs */
+ /**********************/
+ void *visit(program_declaration_c *symbol);
+
+ /********************************/
+ /* B 1.7 Configuration elements */
+ /********************************/
+ void *visit(configuration_declaration_c *symbol);
+
+ /****************************************/
+ /* B.2 - Language IL (Instruction List) */
+ /****************************************/
+ /***********************************/
+ /* B 2.1 Instructions and Operands */
+ /***********************************/
+ // void *visit(instruction_list_c *symbol);
+ void *visit(il_simple_operation_c *symbol);
+ void *visit(il_function_call_c *symbol);
+ void *visit(il_expression_c *symbol);
+ void *visit(il_jump_operation_c *symbol);
+ void *visit(il_fb_call_c *symbol);
+ void *visit(il_formal_funct_call_c *symbol);
+ /*
+ void *visit(il_operand_list_c *symbol);
+ void *visit(simple_instr_list_c *symbol);
+ void *visit(il_param_list_c *symbol);
+ void *visit(il_param_assignment_c *symbol);
+ void *visit(il_param_out_assignment_c *symbol);
+ */
+
+ /*******************/
+ /* B 2.2 Operators */
+ /*******************/
+ void *visit(LD_operator_c *symbol);
+ void *visit(LDN_operator_c *symbol);
+ void *visit(ST_operator_c *symbol);
+ void *visit(STN_operator_c *symbol);
+ void *visit(NOT_operator_c *symbol);
+ void *visit(S_operator_c *symbol);
+ void *visit(R_operator_c *symbol);
+ void *visit(S1_operator_c *symbol);
+ void *visit(R1_operator_c *symbol);
+ void *visit(CLK_operator_c *symbol);
+ void *visit(CU_operator_c *symbol);
+ void *visit(CD_operator_c *symbol);
+ void *visit(PV_operator_c *symbol);
+ void *visit(IN_operator_c *symbol);
+ void *visit(PT_operator_c *symbol);
+ void *visit(AND_operator_c *symbol);
+ void *visit(OR_operator_c *symbol);
+ void *visit(XOR_operator_c *symbol);
+ void *visit(ANDN_operator_c *symbol);
+ void *visit(ORN_operator_c *symbol);
+ void *visit(XORN_operator_c *symbol);
+ void *visit(ADD_operator_c *symbol);
+ void *visit(SUB_operator_c *symbol);
+ void *visit(MUL_operator_c *symbol);
+ void *visit(DIV_operator_c *symbol);
+ void *visit(MOD_operator_c *symbol);
+ void *visit(GT_operator_c *symbol);
+ void *visit(GE_operator_c *symbol);
+ void *visit(EQ_operator_c *symbol);
+ void *visit(LT_operator_c *symbol);
+ void *visit(LE_operator_c *symbol);
+ void *visit(NE_operator_c *symbol);
+ void *visit(CAL_operator_c *symbol);
+ void *visit(CALC_operator_c *symbol);
+ void *visit(CALCN_operator_c *symbol);
+ void *visit(RET_operator_c *symbol);
+ void *visit(RETC_operator_c *symbol);
+ void *visit(RETCN_operator_c *symbol);
+ void *visit(JMP_operator_c *symbol);
+ void *visit(JMPC_operator_c *symbol);
+ void *visit(JMPCN_operator_c *symbol);
+ /* Symbol class handled together with function call checks */
+ // void *visit(il_assign_operator_c *symbol, variable_name);
+ /* Symbol class handled together with function call checks */
+ // void *visit(il_assign_operator_c *symbol, option, variable_name);
+
+
+ /***************************************/
+ /* B.3 - Language ST (Structured Text) */
+ /***************************************/
+ /***********************/
+ /* B 3.1 - Expressions */
+ /***********************/
+ void *visit(or_expression_c *symbol);
+ void *visit(xor_expression_c *symbol);
+ void *visit(and_expression_c *symbol);
+ void *visit(equ_expression_c *symbol);
+ void *visit(notequ_expression_c *symbol);
+ void *visit(lt_expression_c *symbol);
+ void *visit(gt_expression_c *symbol);
+ void *visit(le_expression_c *symbol);
+ void *visit(ge_expression_c *symbol);
+ void *visit(add_expression_c *symbol);
+ void *visit(sub_expression_c *symbol);
+ void *visit(mul_expression_c *symbol);
+ void *visit(div_expression_c *symbol);
+ void *visit(mod_expression_c *symbol);
+ void *visit(power_expression_c *symbol);
+ void *visit(neg_expression_c *symbol);
+ void *visit(not_expression_c *symbol);
+ void *visit(function_invocation_c *symbol);
+
+ /*********************************/
+ /* B 3.2.1 Assignment Statements */
+ /*********************************/
+ void *visit(assignment_statement_c *symbol);
+
+ /*****************************************/
+ /* B 3.2.2 Subprogram Control Statements */
+ /*****************************************/
+ //void *visit(fb_invocation_c *symbol);
+
+ /********************************/
+ /* B 3.2.3 Selection Statements */
+ /********************************/
+ void *visit(if_statement_c *symbol);
+ // void *visit(elseif_statement_list_c *symbol);
+ void *visit(elseif_statement_c *symbol);
+ void *visit(case_statement_c *symbol);
+
+ /********************************/
+ /* B 3.2.4 Iteration Statements */
+ /********************************/
+ void *visit(for_statement_c *symbol);
+ void *visit(while_statement_c *symbol);
+ void *visit(repeat_statement_c *symbol);
+
+}; // fill_candidate_datatypes_c
+
+
+
+
+
+
+
+
+
+
+