etisserant@0: /* msousa@261: * matiec - a compiler for the programming languages defined in IEC 61131-3 msousa@261: * Copyright (C) 2003-2011 Mario de Sousa (msousa@fe.up.pt) Edouard@279: * Copyright (C) 2007-2011 Laurent Bessard and Edouard Tisserant msousa@261: * msousa@261: * This program is free software: you can redistribute it and/or modify msousa@261: * it under the terms of the GNU General Public License as published by msousa@261: * the Free Software Foundation, either version 3 of the License, or msousa@261: * (at your option) any later version. msousa@261: * msousa@261: * This program is distributed in the hope that it will be useful, msousa@261: * but WITHOUT ANY WARRANTY; without even the implied warranty of msousa@261: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the msousa@261: * GNU General Public License for more details. msousa@261: * msousa@261: * You should have received a copy of the GNU General Public License msousa@261: * along with this program. If not, see . msousa@261: * etisserant@0: * etisserant@0: * This code is made available on the understanding that it will not be etisserant@0: * used in safety-critical situations without a full and competent review. etisserant@0: */ etisserant@0: etisserant@0: /* msousa@261: * An IEC 61131-3 compiler. etisserant@0: * etisserant@0: * Based on the etisserant@0: * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10) etisserant@0: * etisserant@0: */ etisserant@0: msousa@261: etisserant@0: /* etisserant@0: * Definition of the Abstract Syntax data structure components etisserant@0: */ etisserant@0: etisserant@0: etisserant@0: /* etisserant@0: * ABSYNTAX.DEF etisserant@0: * etisserant@0: * This generates the parse tree structure used to bind the components etisserant@0: * identified by Bison in the correct syntax order. At the end of the etisserant@0: * Bison analysis the tree is walked in a sequential fashion generating etisserant@0: * the relavent code. etisserant@0: */ etisserant@0: etisserant@0: mario@177: mario@177: mario@177: mario@177: mario@177: /*****************************************************************/ mario@177: /*****************************************************************/ mario@177: /*****************************************************************/ mario@177: /*****************************************************************/ mario@177: /* */ msousa@257: /* safe Symbols are defined in: */ mario@177: /* PLCopen - Technical Committee 5 */ mario@177: /* Safety Software Technical Specification, */ mario@177: /* Part 1: Concepts and Function Blocks, */ mario@177: /* Version 1.0 – Official Release - 2006-01-31 */ mario@177: /* */ mario@177: /*****************************************************************/ mario@177: /*****************************************************************/ mario@177: /*****************************************************************/ mario@177: /*****************************************************************/ mario@177: mario@177: mario@177: mario@177: mario@177: mario@177: mario@177: /*****************************************************************/ mario@177: /*****************************************************************/ mario@177: /*****************************************************************/ mario@177: /*****************************************************************/ mario@177: /* */ mario@177: /* Symbols defined in: */ mario@177: /* FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10) */ mario@177: /* */ mario@177: /*****************************************************************/ mario@177: /*****************************************************************/ mario@177: /*****************************************************************/ mario@177: /*****************************************************************/ mario@177: mario@177: /* Based on the */ mario@177: /* FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10) */ mario@177: mario@177: lbessard@143: /* EN/ENO */ ccb@202: /* NOTE we store 'EN' and 'ENO' tokens in an identifier_c ccb@202: * as they may be used as variables, and it is much easier ccb@202: * to handle them (fewer special cases) if we do it that way... ccb@202: */ ccb@202: /* lbessard@143: SYM_REF0(en_param_c) lbessard@143: SYM_REF0(eno_param_c) ccb@202: */ lbessard@143: msousa@459: /* A class used to identify an entry (literal, variable, etc...) in the abstract syntax tree with an invalid data type */ msousa@459: /* This is only used from stage3 onwards. Stages 1 and 2 will never create any instances of invalid_type_name_c */ msousa@459: SYM_REF0(invalid_type_name_c) msousa@459: msousa@459: msousa@459: msousa@267: /********************/ msousa@267: /* 2.1.6 - Pragmas */ msousa@267: /********************/ msousa@267: SYM_REF0(disable_code_generation_pragma_c) msousa@267: SYM_REF0(enable_code_generation_pragma_c) etisserant@0: SYM_TOKEN(pragma_c) etisserant@0: msousa@267: etisserant@0: /***************************/ etisserant@0: /* B 0 - Programming Model */ etisserant@0: /***************************/ msousa@738: /* 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 */ msousa@738: SYM_LIST(library_c, enumvalue_symtable_t enumvalue_symtable;) etisserant@0: etisserant@0: etisserant@0: /*************************/ etisserant@0: /* B.1 - Common elements */ etisserant@0: /*************************/ etisserant@0: /*******************************************/ etisserant@0: /* B 1.1 - Letters, digits and identifiers */ etisserant@0: /*******************************************/ etisserant@0: SYM_TOKEN(identifier_c) etisserant@0: etisserant@0: etisserant@0: /*********************/ etisserant@0: /* B 1.2 - Constants */ etisserant@0: /*********************/ mjsousa@919: /*********************************/ mjsousa@919: /* B 1.2.XX - Reference Literals */ mjsousa@919: /*********************************/ mjsousa@919: /* defined in IEC 61131-3 v3 - Basically the 'NULL' keyword! */ mjsousa@919: SYM_REF0(ref_value_null_literal_c) etisserant@0: etisserant@0: /******************************/ etisserant@0: /* B 1.2.1 - Numeric Literals */ etisserant@0: /******************************/ etisserant@0: SYM_TOKEN(real_c) etisserant@0: SYM_TOKEN(integer_c) etisserant@0: SYM_TOKEN(binary_integer_c) etisserant@0: SYM_TOKEN(octal_integer_c) etisserant@0: SYM_TOKEN(hex_integer_c) etisserant@0: etisserant@0: /* Note: etisserant@0: * We do not have signed_integer_c and signed_real_c classes. etisserant@0: * These are stored in the parse tree as a integer_c or real_c msousa@257: * preceded by a unary minus operator if they are inside an expression, msousa@257: * or a neg_integer_c and neg_real_c when used outside an ST expression. etisserant@0: */ etisserant@0: /* Not required: etisserant@0: SYM_TOKEN(signed_integer_c) etisserant@0: SYM_TOKEN(signed_real_c) etisserant@0: */ etisserant@0: msousa@257: /* NOTE: literal __values__ are stored directly in classes such as: msousa@257: * - real_c msousa@257: * - integer_c msousa@257: * - binary_integer_c msousa@257: * - etc... msousa@257: * msousa@257: * However, for both the real_c and the integer_c, if they are preceded msousa@257: * by a '-' negation sign, they are further encapsulated inside msousa@257: * a neg_literal_c (i.e. the neg_literal_c will point to the msousa@257: * real_c or integer_c with the value being negated. msousa@257: * neg_literal_c -> integer_literal_c msousa@257: * OR msousa@257: * neg_literal_c -> real_literal_c msousa@257: * msousa@471: * However, this has since been changed to... msousa@257: * - replace the neg_literal_c with two distinc classes msousa@257: * (neg_integer_c and neg_real_c), one for each msousa@471: * lietral type. msousa@471: * msousa@471: * This change was done in order to ease the writing of semantic verification (stage3) code. msousa@471: * However, that version of the code has since been replaced by a newer and better algoritm. msousa@471: * This means the above change can now be undone, but there is really no need to undo it, msousa@471: * so we leave it as it is. msousa@257: */ msousa@257: SYM_REF1(neg_real_c, exp) msousa@257: SYM_REF1(neg_integer_c, exp) lbessard@118: ccb@202: /* Not required: etisserant@0: SYM_REF2(numeric_literal_c, type, value) ccb@202: */ etisserant@0: SYM_REF2(integer_literal_c, type, value) etisserant@0: SYM_REF2(real_literal_c, type, value) etisserant@0: SYM_REF2(bit_string_literal_c, type, value) msousa@257: /* A typed or untyped boolean literal... */ msousa@257: /* type may be NULL */ etisserant@0: SYM_REF2(boolean_literal_c, type, value) etisserant@0: etisserant@0: /* helper class for boolean_literal_c */ etisserant@0: SYM_REF0(boolean_true_c) etisserant@0: etisserant@0: /* helper class for boolean_literal_c */ etisserant@0: SYM_REF0(boolean_false_c) etisserant@0: etisserant@0: etisserant@0: /*******************************/ etisserant@0: /* B.1.2.2 Character Strings */ etisserant@0: /*******************************/ etisserant@0: SYM_TOKEN(double_byte_character_string_c) etisserant@0: SYM_TOKEN(single_byte_character_string_c) etisserant@0: etisserant@0: etisserant@0: /***************************/ etisserant@0: /* B 1.2.3 - Time Literals */ etisserant@0: /***************************/ etisserant@0: etisserant@0: /************************/ etisserant@0: /* B 1.2.3.1 - Duration */ etisserant@0: /************************/ etisserant@0: SYM_REF0(neg_time_c) msousa@257: SYM_REF3(duration_c, type_name, neg, interval) msousa@547: SYM_REF5(interval_c, days, hours, minutes, seconds, milliseconds) etisserant@0: SYM_TOKEN(fixed_point_c) msousa@547: /* etisserant@0: SYM_REF2(days_c, days, hours) etisserant@0: SYM_REF2(hours_c, hours, minutes) etisserant@0: SYM_REF2(minutes_c, minutes, seconds) etisserant@0: SYM_REF2(seconds_c, seconds, milliseconds) mario@69: SYM_REF1(milliseconds_c, milliseconds) msousa@547: */ etisserant@0: etisserant@0: /************************************/ etisserant@0: /* B 1.2.3.2 - Time of day and Date */ etisserant@0: /************************************/ msousa@257: SYM_REF2(time_of_day_c, type_name, daytime) mario@69: SYM_REF3(daytime_c, day_hour, day_minute, day_second) msousa@257: SYM_REF2(date_c, type_name, date_literal) mario@69: SYM_REF3(date_literal_c, year, month, day) msousa@257: SYM_REF3(date_and_time_c, type_name, date_literal, daytime) etisserant@0: etisserant@0: etisserant@0: /**********************/ etisserant@0: /* B.1.3 - Data types */ etisserant@0: /**********************/ etisserant@0: /***********************************/ etisserant@0: /* B 1.3.1 - Elementary Data Types */ etisserant@0: /***********************************/ etisserant@0: SYM_REF0(time_type_name_c) etisserant@0: SYM_REF0(bool_type_name_c) etisserant@0: SYM_REF0(sint_type_name_c) etisserant@0: SYM_REF0(int_type_name_c) etisserant@0: SYM_REF0(dint_type_name_c) etisserant@0: SYM_REF0(lint_type_name_c) etisserant@0: SYM_REF0(usint_type_name_c) etisserant@0: SYM_REF0(uint_type_name_c) etisserant@0: SYM_REF0(udint_type_name_c) etisserant@0: SYM_REF0(ulint_type_name_c) etisserant@0: SYM_REF0(real_type_name_c) etisserant@0: SYM_REF0(lreal_type_name_c) etisserant@0: SYM_REF0(date_type_name_c) etisserant@0: SYM_REF0(tod_type_name_c) etisserant@0: SYM_REF0(dt_type_name_c) etisserant@0: SYM_REF0(byte_type_name_c) etisserant@0: SYM_REF0(word_type_name_c) etisserant@0: SYM_REF0(dword_type_name_c) etisserant@0: SYM_REF0(lword_type_name_c) etisserant@0: SYM_REF0(string_type_name_c) etisserant@0: SYM_REF0(wstring_type_name_c) ccb@202: msousa@257: /*****************************************************************/ msousa@257: /* Keywords defined in "Safety Software Technical Specification" */ msousa@257: /*****************************************************************/ msousa@257: msousa@257: SYM_REF0(safetime_type_name_c) msousa@257: SYM_REF0(safebool_type_name_c) msousa@257: SYM_REF0(safesint_type_name_c) msousa@257: SYM_REF0(safeint_type_name_c) msousa@257: SYM_REF0(safedint_type_name_c) msousa@257: SYM_REF0(safelint_type_name_c) msousa@257: SYM_REF0(safeusint_type_name_c) msousa@257: SYM_REF0(safeuint_type_name_c) msousa@257: SYM_REF0(safeudint_type_name_c) msousa@257: SYM_REF0(safeulint_type_name_c) msousa@257: SYM_REF0(safereal_type_name_c) msousa@257: SYM_REF0(safelreal_type_name_c) msousa@257: SYM_REF0(safedate_type_name_c) msousa@257: SYM_REF0(safetod_type_name_c) msousa@257: SYM_REF0(safedt_type_name_c) msousa@257: SYM_REF0(safebyte_type_name_c) msousa@257: SYM_REF0(safeword_type_name_c) msousa@257: SYM_REF0(safedword_type_name_c) msousa@257: SYM_REF0(safelword_type_name_c) msousa@257: SYM_REF0(safestring_type_name_c) msousa@257: SYM_REF0(safewstring_type_name_c) etisserant@0: etisserant@0: etisserant@0: /********************************/ etisserant@0: /* B.1.3.2 - Generic data types */ etisserant@0: /********************************/ etisserant@0: mjsousa@921: /* ANY is currently only allowed when defining REF_TO ANY datatypes mjsousa@921: * (equivalent to a (void *)). This is a non standard extension to the mjsousa@921: * standard. mjsousa@921: * Standard library function that use the generic datatypes (ANY_***) are mjsousa@921: * currently handed as overloaded functions, and do not therefore require mjsousa@921: * the use of the generic datatype keywords. mjsousa@921: */ mjsousa@921: SYM_REF0(generic_type_any_c) // ANY mjsousa@921: /* mjsousa@921: SYM_REF0(generic_type_any_derived_c) // ANY_DERIVED mjsousa@921: SYM_REF0(generic_type_any_elementary_c) // ANY_ELEMENTARY mjsousa@921: SYM_REF0(generic_type_any_magnitude_c) // ANY_MAGNITUDE mjsousa@921: SYM_REF0(generic_type_any_num_c) // ANY_NUM mjsousa@921: SYM_REF0(generic_type_any_real_c) // ANY_REAL mjsousa@921: SYM_REF0(generic_type_any_int_c) // ANY_INT mjsousa@921: SYM_REF0(generic_type_any_bit_c) // ANY_BIT mjsousa@921: SYM_REF0(generic_type_any_string_c) // ANY_STRING mjsousa@921: SYM_REF0(generic_type_any_date_c) // ANY_DATE mjsousa@921: */ mjsousa@921: etisserant@0: /********************************/ etisserant@0: /* B 1.3.3 - Derived data types */ etisserant@0: /********************************/ etisserant@0: /* TYPE type_declaration_list END_TYPE */ mario@69: SYM_REF1(data_type_declaration_c, type_declaration_list) etisserant@0: etisserant@0: /* helper symbol for data_type_declaration */ etisserant@0: SYM_LIST(type_declaration_list_c) etisserant@0: etisserant@0: /* simple_type_name ':' simple_spec_init */ etisserant@0: SYM_REF2(simple_type_declaration_c, simple_type_name, simple_spec_init) etisserant@0: etisserant@0: etisserant@0: /* simple_specification ASSIGN constant */ etisserant@0: SYM_REF2(simple_spec_init_c, simple_specification, constant) etisserant@0: etisserant@0: /* subrange_type_name ':' subrange_spec_init */ etisserant@0: SYM_REF2(subrange_type_declaration_c, subrange_type_name, subrange_spec_init) etisserant@0: etisserant@0: /* subrange_specification ASSIGN signed_integer */ etisserant@0: SYM_REF2(subrange_spec_init_c, subrange_specification, signed_integer) etisserant@0: etisserant@0: /* integer_type_name '(' subrange')' */ etisserant@0: SYM_REF2(subrange_specification_c, integer_type_name, subrange) etisserant@0: etisserant@0: /* signed_integer DOTDOT signed_integer */ msousa@592: /* dimension will be filled in during stage 3 (array_range_check_c) with the number of elements in this subrange */ msousa@592: SYM_REF2(subrange_c, lower_limit, upper_limit, unsigned long long int dimension;) etisserant@0: etisserant@0: /* enumerated_type_name ':' enumerated_spec_init */ etisserant@0: SYM_REF2(enumerated_type_declaration_c, enumerated_type_name, enumerated_spec_init) etisserant@0: etisserant@0: /* enumerated_specification ASSIGN enumerated_value */ etisserant@0: SYM_REF2(enumerated_spec_init_c, enumerated_specification, enumerated_value) etisserant@0: etisserant@0: /* helper symbol for enumerated_specification->enumerated_spec_init */ etisserant@0: /* enumerated_value_list ',' enumerated_value */ etisserant@0: SYM_LIST(enumerated_value_list_c) etisserant@0: etisserant@0: /* enumerated_type_name '#' identifier */ etisserant@0: SYM_REF2(enumerated_value_c, type, value) etisserant@0: etisserant@0: /* identifier ':' array_spec_init */ etisserant@0: SYM_REF2(array_type_declaration_c, identifier, array_spec_init) etisserant@0: mjsousa@909: /* array_specification [ASSIGN array_initialization] */ etisserant@0: /* array_initialization may be NULL ! */ etisserant@0: SYM_REF2(array_spec_init_c, array_specification, array_initialization) etisserant@0: etisserant@0: /* ARRAY '[' array_subrange_list ']' OF non_generic_type_name */ etisserant@0: SYM_REF2(array_specification_c, array_subrange_list, non_generic_type_name) etisserant@0: etisserant@0: /* helper symbol for array_specification */ etisserant@0: /* array_subrange_list ',' subrange */ etisserant@0: SYM_LIST(array_subrange_list_c) etisserant@0: etisserant@0: /* array_initialization: '[' array_initial_elements_list ']' */ etisserant@0: /* helper symbol for array_initialization */ etisserant@0: /* array_initial_elements_list ',' array_initial_elements */ etisserant@0: SYM_LIST(array_initial_elements_list_c) etisserant@0: etisserant@0: /* integer '(' [array_initial_element] ')' */ etisserant@0: /* array_initial_element may be NULL ! */ etisserant@0: SYM_REF2(array_initial_elements_c, integer, array_initial_element) etisserant@0: etisserant@0: /* structure_type_name ':' structure_specification */ etisserant@0: SYM_REF2(structure_type_declaration_c, structure_type_name, structure_specification) etisserant@0: etisserant@0: /* structure_type_name ASSIGN structure_initialization */ etisserant@0: /* structure_initialization may be NULL ! */ etisserant@0: SYM_REF2(initialized_structure_c, structure_type_name, structure_initialization) etisserant@0: etisserant@0: /* helper symbol for structure_declaration */ etisserant@0: /* structure_declaration: STRUCT structure_element_declaration_list END_STRUCT */ etisserant@0: /* structure_element_declaration_list structure_element_declaration ';' */ etisserant@0: SYM_LIST(structure_element_declaration_list_c) etisserant@0: etisserant@0: /* structure_element_name ':' *_spec_init */ etisserant@0: SYM_REF2(structure_element_declaration_c, structure_element_name, spec_init) etisserant@0: etisserant@0: /* helper symbol for structure_initialization */ etisserant@0: /* structure_initialization: '(' structure_element_initialization_list ')' */ etisserant@0: /* structure_element_initialization_list ',' structure_element_initialization */ etisserant@0: SYM_LIST(structure_element_initialization_list_c) etisserant@0: etisserant@0: /* structure_element_name ASSIGN value */ etisserant@0: SYM_REF2(structure_element_initialization_c, structure_element_name, value) etisserant@0: etisserant@0: /* string_type_name ':' elementary_string_type_name string_type_declaration_size string_type_declaration_init */ etisserant@0: /* etisserant@0: * NOTE: etisserant@0: * (Summary: Contrary to what is expected, the etisserant@0: * string_type_declaration_c is not used to store etisserant@0: * simple string type declarations that do not include etisserant@0: * size limits. etisserant@0: * For e.g.: etisserant@0: * str1_type: STRING := "hello!" etisserant@0: * will be stored in a simple_type_declaration_c etisserant@0: * instead of a string_type_declaration_c. etisserant@0: * The following: etisserant@0: * str2_type: STRING [64] := "hello!" etisserant@0: * will be stored in a sring_type_declaration_c etisserant@0: * etisserant@0: * Read on for why this is done... etisserant@0: * End Summary) etisserant@0: * etisserant@0: * According to the spec, the valid construct etisserant@0: * TYPE new_str_type : STRING := "hello!"; END_TYPE etisserant@0: * has two possible routes to type_declaration... etisserant@0: * etisserant@0: * Route 1: etisserant@0: * type_declaration: single_element_type_declaration etisserant@0: * single_element_type_declaration: simple_type_declaration etisserant@0: * simple_type_declaration: identifier ':' simple_spec_init etisserant@0: * simple_spec_init: simple_specification ASSIGN constant etisserant@0: * (shift: identifier <- 'new_str_type') etisserant@0: * simple_specification: elementary_type_name etisserant@0: * elementary_type_name: STRING etisserant@0: * (shift: elementary_type_name <- STRING) etisserant@0: * (reduce: simple_specification <- elementary_type_name) etisserant@0: * (shift: constant <- "hello!") etisserant@0: * (reduce: simple_spec_init: simple_specification ASSIGN constant) etisserant@0: * (reduce: ...) etisserant@0: * etisserant@0: * etisserant@0: * Route 2: etisserant@0: * type_declaration: string_type_declaration etisserant@0: * string_type_declaration: identifier ':' elementary_string_type_name string_type_declaration_size string_type_declaration_init etisserant@0: * (shift: identifier <- 'new_str_type') etisserant@0: * elementary_string_type_name: STRING etisserant@0: * (shift: elementary_string_type_name <- STRING) etisserant@0: * (shift: string_type_declaration_size <- empty ) etisserant@0: * string_type_declaration_init: ASSIGN character_string etisserant@0: * (shift: character_string <- "hello!") etisserant@0: * (reduce: string_type_declaration_init <- ASSIGN character_string) etisserant@0: * (reduce: string_type_declaration <- identifier ':' elementary_string_type_name string_type_declaration_size string_type_declaration_init ) etisserant@0: * (reduce: type_declaration <- string_type_declaration) etisserant@0: * etisserant@0: * etisserant@0: * At first glance it seems that removing route 1 would make etisserant@0: * the most sense. Unfortunately the construct 'simple_spec_init' etisserant@0: * shows up multiple times in other rules, so changing this construct etisserant@0: * would also mean changing all the rules in which it appears. etisserant@0: * I (Mario) therefore chose to remove route 2 instead. This means etisserant@0: * that the above declaration gets stored in a etisserant@0: * simple_type_declaration_c, and not in a string_type_declaration_c etisserant@0: * as would be expected! etisserant@0: */ etisserant@0: /* string_type_name ':' elementary_string_type_name string_type_declaration_size string_type_declaration_init */ etisserant@0: SYM_REF4(string_type_declaration_c, string_type_name, etisserant@0: elementary_string_type_name, etisserant@0: string_type_declaration_size, etisserant@0: string_type_declaration_init) /* may be == NULL! */ etisserant@0: etisserant@0: msousa@810: /* helper symbol for fb_name_decl_c */ msousa@810: /* This symbol/leaf does not exist in the IEC standard syntax as an isolated symbol, msousa@810: * as, for some reason, the standard syntax defines FB variable declarations in a slightly msousa@810: * different style as all other spec_init declarations. I.e., fr FBs variable declarations, msousa@810: * the standard defines a single leaf/node (fb_name_decl) that references: msousa@810: * a) the variable name list msousa@810: * b) the FB datatype msousa@810: * c) the FB intial value msousa@810: * msousa@810: * All other variable declarations break this out into two nodes: msousa@810: * 1) references b) and c) above (usually named ***_spec_init) msousa@810: * 2) references a), and node 1) msousa@810: * msousa@810: * In order to allow the datatype analyses to proceed without special cases, we will handle msousa@810: * FB variable declarations in the same style. For this reason, we have added the msousa@810: * following node to the Abstract Syntax Tree, even though it does not have a direct equivalent in msousa@810: * the standard syntax. msousa@810: */ msousa@810: /* function_block_type_name ASSIGN structure_initialization */ msousa@810: /* structure_initialization -> may be NULL ! */ msousa@810: SYM_REF2(fb_spec_init_c, function_block_type_name, structure_initialization) msousa@810: msousa@810: mjsousa@876: /* Taken fron IEC 61131-3 v3 mjsousa@876: * // Table 14 - Reference operations mjsousa@876: * Ref_Type_Decl : Ref_Type_Name ':' Ref_Spec_Init ; mjsousa@876: * Ref_Spec_Init : Ref_Spec ( ':=' Ref_Value )? ; mjsousa@876: * Ref_Spec : 'REF_TO' Non_Gen_Type_Name ; mjsousa@876: * Ref_Type_Name : Identifier ; mjsousa@876: * Ref_Name : Identifier ; mjsousa@876: * Ref_Value : Ref_Addr | 'NULL' ; mjsousa@876: * Ref_Addr : 'REF' '(' (Symbolic_Variable | FB_Name | Class_Instance_Name ) ')' ; mjsousa@876: * Ref_Assign : Ref_Name ':=' (Ref_Name | Ref_Deref | Ref_Value ) ; mjsousa@876: * Ref_Deref : 'DREF' '(' Ref_Name ')' ; mjsousa@876: */ mjsousa@876: mjsousa@909: /* REF_TO (non_generic_type_name | function_block_type_name) */ mjsousa@876: SYM_REF1(ref_spec_c, type_name) mjsousa@876: mjsousa@909: /* ref_spec [ ASSIGN ref_initialization ]; */ mjsousa@909: /* NOTE: ref_initialization may be NULL!! */ mjsousa@909: SYM_REF2(ref_spec_init_c, ref_spec, ref_initialization) mjsousa@909: mjsousa@909: /* identifier ':' ref_spec_init */ mjsousa@876: SYM_REF2(ref_type_decl_c, ref_type_name, ref_spec_init) mjsousa@876: mjsousa@876: etisserant@0: /*********************/ etisserant@0: /* B 1.4 - Variables */ etisserant@0: /*********************/ mario@69: SYM_REF1(symbolic_variable_c, var_name) etisserant@0: etisserant@0: /********************************************/ etisserant@0: /* B.1.4.1 Directly Represented Variables */ etisserant@0: /********************************************/ etisserant@0: SYM_TOKEN(direct_variable_c) etisserant@0: etisserant@0: /*************************************/ etisserant@0: /* B.1.4.2 Multi-element Variables */ etisserant@0: /*************************************/ etisserant@0: /* subscripted_variable '[' subscript_list ']' */ etisserant@0: SYM_REF2(array_variable_c, subscripted_variable, subscript_list) etisserant@0: etisserant@0: /* subscript_list ',' subscript */ etisserant@0: SYM_LIST(subscript_list_c) etisserant@0: etisserant@0: /* record_variable '.' field_selector */ etisserant@0: /* WARNING: input and/or output variables of function blocks etisserant@1: * may be accessed as fields of a structured variable! msousa@619: * Code handling a structured_variable_c must take this into account! msousa@619: * (i.e. that a FB instance may be accessed as a structured variable)! msousa@619: * msousa@619: * WARNING: Status bit (.X) and activation time (.T) of STEPS in SFC diagrams msousa@619: * may be accessed as fields of a structured variable! msousa@619: * Code handling a structured_variable_c must take this into account msousa@619: * (i.e. that an SFC STEP may be accessed as a structured variable)! etisserant@0: */ etisserant@0: SYM_REF2(structured_variable_c, record_variable, field_selector) etisserant@0: etisserant@0: /******************************************/ etisserant@0: /* B 1.4.3 - Declaration & Initialisation */ etisserant@0: /******************************************/ etisserant@0: SYM_REF0(constant_option_c) etisserant@0: SYM_REF0(retain_option_c) etisserant@0: SYM_REF0(non_retain_option_c) etisserant@0: etisserant@0: /* option -> the RETAIN/NON_RETAIN/ directive... */ ccb@202: /* NOTE: We need to implicitly define the EN and ENO function and FB parameters when the user ccb@202: * does not do it explicitly in the IEC 61131-3 source code. ccb@202: * To be able to distinguish later on between implictly and explicitly defined ccb@202: * variables, we use the 'method' flag that allows us to remember ccb@202: * whether this declaration was in the original source code (method -> implicit_definition_c) ccb@202: * or not (method -> explicit_definition_c). ccb@202: */ ccb@202: SYM_REF3(input_declarations_c, option, input_declaration_list, method) etisserant@0: etisserant@0: /* helper symbol for input_declarations */ etisserant@0: SYM_LIST(input_declaration_list_c) etisserant@0: ccb@202: /* NOTE: The formal definition of the standard is erroneous, as it simply does not ccb@202: * consider the EN and ENO keywords! ccb@202: * The semantic description of the languages clearly states that these may be ccb@202: * used in several ways. One of them is to declare an EN input parameter, or ccb@202: * an ENO output parameter. ccb@202: * We have added the 'en_param_declaration_c' and 'eno_param_declaration_c' ccb@202: * to cover for this. ccb@202: * ccb@202: * We could have re-used the standard class used for all other input variables (with ccb@202: * an identifier set to 'EN' or 'ENO') however we may sometimes need to add this ccb@202: * declaration implicitly (if the user does not include it in the source ccb@202: * code himself), and it is good to know whether it was added implicitly or not. ccb@202: * So we create a new class that has a 'method' flag that allows us to remember ccb@202: * whether this declaration was in the original source code (method -> implicit_definition_c) ccb@202: * or not (method -> explicit_definition_c). ccb@202: */ ccb@202: SYM_REF0(implicit_definition_c) ccb@202: SYM_REF0(explicit_definition_c) msousa@805: /* type_decl is a simple_spec_init_c */ msousa@805: SYM_REF3(en_param_declaration_c, name, type_decl, method) ccb@202: SYM_REF3(eno_param_declaration_c, name, type, method) ccb@202: etisserant@0: /* edge -> The F_EDGE or R_EDGE directive */ etisserant@0: SYM_REF2(edge_declaration_c, edge, var1_list) etisserant@0: etisserant@0: SYM_REF0(raising_edge_option_c) etisserant@0: SYM_REF0(falling_edge_option_c) etisserant@0: etisserant@0: /* spec_init is one of the following... etisserant@0: * simple_spec_init_c * etisserant@0: * subrange_spec_init_c * etisserant@0: * enumerated_spec_init_c * etisserant@0: */ etisserant@0: SYM_REF2(var1_init_decl_c, var1_list, spec_init) etisserant@0: etisserant@0: /* | var1_list ',' variable_name */ etisserant@0: SYM_LIST(var1_list_c) etisserant@0: msousa@350: /* | [var1_list ','] variable_name integer '..' */ msousa@350: /* NOTE: This is an extension to the standard!!! */ msousa@350: /* In order to be able to handle extensible standard functions msousa@350: * (i.e. standard functions that may have a variable number of msousa@350: * input parameters, such as AND(word#33, word#44, word#55, word#66), msousa@350: * we have extended the acceptable syntax to allow var_name '..' msousa@350: * in an input variable declaration. msousa@350: * msousa@350: * This allows us to parse the declaration of standard msousa@350: * extensible functions and load their interface definition msousa@350: * into the abstract syntax tree just like we do to other msousa@350: * user defined functions. msousa@350: * This has the advantage that we can later do semantic msousa@350: * checking of calls to functions (be it a standard or user defined msousa@350: * function) in (almost) exactly the same way. msousa@350: * msousa@350: * The integer tells the compiler the number of the first parameter. msousa@350: * for example, for ADD(IN1 := 11, IN2:=22), the index for IN starts off at 1. msousa@350: * Some other standard library functions, such as MUX, has the extensible msousa@350: * variable starting off from 0 (IN0, IN1, IN2, ...). msousa@350: * msousa@350: * Of course, we have a flag that disables this syntax when parsing user msousa@350: * written code, so we only allow this extra syntax while parsing the msousa@350: * 'header' file that declares all the standard IEC 61131-3 functions. msousa@350: */ msousa@350: SYM_REF2(extensible_input_parameter_c, var_name, first_index) msousa@350: etisserant@0: /* var1_list ':' array_spec_init */ etisserant@0: SYM_REF2(array_var_init_decl_c, var1_list, array_spec_init) etisserant@0: etisserant@0: /* var1_list ':' initialized_structure */ etisserant@0: SYM_REF2(structured_var_init_decl_c, var1_list, initialized_structure) etisserant@0: etisserant@0: /* fb_name_list ':' function_block_type_name ASSIGN structure_initialization */ msousa@810: /* NOTE: in order to allow datatype handling to proceed using the normal algorithm with no special cases, msousa@810: * we will be storing the msousa@810: * function_block_type_name ASSIGN structure_initialization msousa@810: * componentes inside a new node, namely fb_spec_init_c msousa@810: */ etisserant@0: /* structure_initialization -> may be NULL ! */ msousa@810: SYM_REF2(fb_name_decl_c, fb_name_list, fb_spec_init) etisserant@0: etisserant@0: /* fb_name_list ',' fb_name */ etisserant@0: SYM_LIST(fb_name_list_c) etisserant@0: etisserant@0: /* VAR_OUTPUT [RETAIN | NON_RETAIN] var_init_decl_list END_VAR */ etisserant@0: /* option -> may be NULL ! */ ccb@202: /* NOTE: We need to implicitly define the EN and ENO function and FB parameters when the user ccb@202: * does not do it explicitly in the IEC 61131-3 source code. ccb@202: * To be able to distinguish later on between implictly and explicitly defined ccb@202: * variables, we use the 'method' flag that allows us to remember ccb@202: * whether this declaration was in the original source code (method -> implicit_definition_c) ccb@202: * or not (method -> explicit_definition_c). ccb@202: */ ccb@202: SYM_REF3(output_declarations_c, option, var_init_decl_list, method) lbessard@146: etisserant@0: /* VAR_IN_OUT var_declaration_list END_VAR */ mario@69: SYM_REF1(input_output_declarations_c, var_declaration_list) etisserant@0: etisserant@0: /* helper symbol for input_output_declarations */ etisserant@0: /* var_declaration_list var_declaration ';' */ etisserant@0: SYM_LIST(var_declaration_list_c) etisserant@0: etisserant@0: /* var1_list ':' array_specification */ etisserant@0: SYM_REF2(array_var_declaration_c, var1_list, array_specification) etisserant@0: etisserant@0: /* var1_list ':' structure_type_name */ etisserant@0: SYM_REF2(structured_var_declaration_c, var1_list, structure_type_name) etisserant@0: etisserant@0: /* VAR [CONSTANT] var_init_decl_list END_VAR */ etisserant@0: /* option -> may be NULL ! */ etisserant@0: SYM_REF2(var_declarations_c, option, var_init_decl_list) etisserant@0: etisserant@0: /* VAR RETAIN var_init_decl_list END_VAR */ mario@69: SYM_REF1(retentive_var_declarations_c, var_init_decl_list) etisserant@0: etisserant@0: /* VAR [CONSTANT|RETAIN|NON_RETAIN] located_var_decl_list END_VAR */ etisserant@0: /* option -> may be NULL ! */ etisserant@0: SYM_REF2(located_var_declarations_c, option, located_var_decl_list) etisserant@0: etisserant@0: /* helper symbol for located_var_declarations */ etisserant@0: /* located_var_decl_list located_var_decl ';' */ etisserant@0: SYM_LIST(located_var_decl_list_c) etisserant@0: etisserant@0: /* [variable_name] location ':' located_var_spec_init */ etisserant@0: /* variable_name -> may be NULL ! */ mario@69: SYM_REF3(located_var_decl_c, variable_name, location, located_var_spec_init) etisserant@0: etisserant@0: /*| VAR_EXTERNAL [CONSTANT] external_declaration_list END_VAR */ etisserant@0: /* option -> may be NULL ! */ etisserant@0: SYM_REF2(external_var_declarations_c, option, external_declaration_list) etisserant@0: etisserant@0: /* helper symbol for external_var_declarations */ etisserant@0: /*| external_declaration_list external_declaration';' */ etisserant@0: SYM_LIST(external_declaration_list_c) etisserant@0: etisserant@0: /* global_var_name ':' (simple_specification|subrange_specification|enumerated_specification|array_specification|prev_declared_structure_type_name|function_block_type_name */ etisserant@0: SYM_REF2(external_declaration_c, global_var_name, specification) etisserant@0: etisserant@0: /*| VAR_GLOBAL [CONSTANT|RETAIN] global_var_decl_list END_VAR */ etisserant@0: /* option -> may be NULL ! */ etisserant@0: SYM_REF2(global_var_declarations_c, option, global_var_decl_list) etisserant@0: etisserant@0: /* helper symbol for global_var_declarations */ etisserant@0: /*| global_var_decl_list global_var_decl ';' */ etisserant@0: SYM_LIST(global_var_decl_list_c) etisserant@0: etisserant@0: /*| global_var_spec ':' [located_var_spec_init|function_block_type_name] */ etisserant@0: /* type_specification ->may be NULL ! */ etisserant@0: SYM_REF2(global_var_decl_c, global_var_spec, type_specification) etisserant@0: etisserant@0: /*| global_var_name location */ etisserant@0: SYM_REF2(global_var_spec_c, global_var_name, location) etisserant@0: etisserant@0: /* AT direct_variable */ mario@69: SYM_REF1(location_c, direct_variable) etisserant@0: etisserant@0: /*| global_var_list ',' global_var_name */ etisserant@0: SYM_LIST(global_var_list_c) etisserant@0: etisserant@0: /* var1_list ':' single_byte_string_spec */ etisserant@0: SYM_REF2(single_byte_string_var_declaration_c, var1_list, single_byte_string_spec) etisserant@0: etisserant@0: /* STRING ['[' integer ']'] [ASSIGN single_byte_character_string] */ etisserant@0: /* integer ->may be NULL ! */ etisserant@0: /* single_byte_character_string ->may be NULL ! */ msousa@350: SYM_REF2(single_byte_string_spec_c, string_spec, single_byte_character_string) msousa@350: msousa@350: /* STRING ['[' integer ']'] */ msousa@350: /* integer ->may be NULL ! */ msousa@350: SYM_REF2(single_byte_limited_len_string_spec_c, string_type_name, character_string_len) msousa@350: msousa@350: /* WSTRING ['[' integer ']'] */ msousa@350: /* integer ->may be NULL ! */ msousa@350: SYM_REF2(double_byte_limited_len_string_spec_c, string_type_name, character_string_len) etisserant@0: etisserant@0: /* var1_list ':' double_byte_string_spec */ etisserant@0: SYM_REF2(double_byte_string_var_declaration_c, var1_list, double_byte_string_spec) etisserant@0: etisserant@0: /* WSTRING ['[' integer ']'] [ASSIGN double_byte_character_string] */ etisserant@0: /* integer ->may be NULL ! */ etisserant@0: /* double_byte_character_string ->may be NULL ! */ msousa@350: SYM_REF2(double_byte_string_spec_c, string_spec, double_byte_character_string) etisserant@0: etisserant@0: /*| VAR [RETAIN|NON_RETAIN] incompl_located_var_decl_list END_VAR */ etisserant@0: /* option ->may be NULL ! */ etisserant@0: SYM_REF2(incompl_located_var_declarations_c, option, incompl_located_var_decl_list) etisserant@0: etisserant@0: /* helper symbol for incompl_located_var_declarations */ etisserant@0: /*| incompl_located_var_decl_list incompl_located_var_decl ';' */ etisserant@0: SYM_LIST(incompl_located_var_decl_list_c) etisserant@0: etisserant@0: /* variable_name incompl_location ':' var_spec */ mario@69: SYM_REF3(incompl_located_var_decl_c, variable_name, incompl_location, var_spec) etisserant@0: etisserant@0: /* AT incompl_location_token */ etisserant@0: SYM_TOKEN(incompl_location_c) etisserant@0: etisserant@0: /* intermediate helper symbol for: etisserant@0: * - non_retentive_var_decls etisserant@0: * - output_declarations etisserant@0: */ etisserant@0: SYM_LIST(var_init_decl_list_c) etisserant@0: etisserant@0: etisserant@0: etisserant@0: etisserant@0: /**************************************/ etisserant@0: /* B.1.5 - Program organization units */ etisserant@0: /**************************************/ etisserant@0: /***********************/ etisserant@0: /* B 1.5.1 - Functions */ etisserant@0: /***********************/ msousa@738: /* 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 */ msousa@738: SYM_REF4(function_declaration_c, derived_function_name, type_name, var_declarations_list, function_body, enumvalue_symtable_t enumvalue_symtable;) etisserant@0: etisserant@0: /* intermediate helper symbol for etisserant@0: * - function_declaration etisserant@0: * - function_block_declaration etisserant@0: * - program_declaration etisserant@0: */ etisserant@0: SYM_LIST(var_declarations_list_c) etisserant@0: etisserant@0: /* option -> storage method, CONSTANT or */ etisserant@0: SYM_REF2(function_var_decls_c, option, decl_list) etisserant@0: etisserant@0: /* intermediate helper symbol for function_var_decls */ etisserant@0: SYM_LIST(var2_init_decl_list_c) etisserant@0: etisserant@0: etisserant@0: /*****************************/ etisserant@0: /* B 1.5.2 - Function Blocks */ etisserant@0: /*****************************/ etisserant@0: /* FUNCTION_BLOCK derived_function_block_name io_OR_other_var_declarations function_block_body END_FUNCTION_BLOCK */ msousa@738: /* 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 */ msousa@738: SYM_REF3(function_block_declaration_c, fblock_name, var_declarations, fblock_body, enumvalue_symtable_t enumvalue_symtable;) etisserant@0: etisserant@0: /* intermediate helper symbol for function_declaration */ etisserant@0: /* { io_var_declarations | other_var_declarations } */ etisserant@0: /* etisserant@0: * NOTE: we re-use the var_declarations_list_c etisserant@0: */ etisserant@0: etisserant@0: /* VAR_TEMP temp_var_decl_list END_VAR */ mario@69: SYM_REF1(temp_var_decls_c, var_decl_list) etisserant@0: etisserant@0: /* intermediate helper symbol for temp_var_decls */ etisserant@0: SYM_LIST(temp_var_decls_list_c) etisserant@0: etisserant@0: /* VAR NON_RETAIN var_init_decl_list END_VAR */ mario@69: SYM_REF1(non_retentive_var_decls_c, var_decl_list) etisserant@0: etisserant@0: etisserant@0: /**********************/ etisserant@0: /* B 1.5.3 - Programs */ etisserant@0: /**********************/ etisserant@0: /* PROGRAM program_type_name program_var_declarations_list function_block_body END_PROGRAM */ msousa@738: /* 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 */ msousa@738: SYM_REF3(program_declaration_c, program_type_name, var_declarations, function_block_body, enumvalue_symtable_t enumvalue_symtable;) etisserant@0: etisserant@0: /* intermediate helper symbol for program_declaration_c */ etisserant@0: /* { io_var_declarations | other_var_declarations } */ etisserant@0: /* etisserant@0: * NOTE: we re-use the var_declarations_list_c etisserant@0: */ etisserant@0: etisserant@0: etisserant@0: etisserant@0: /*********************************************/ etisserant@0: /* B.1.6 Sequential function chart elements */ etisserant@0: /*********************************************/ etisserant@0: mario@97: /* | sequential_function_chart sfc_network */ etisserant@1: SYM_LIST(sequential_function_chart_c) etisserant@1: mario@97: /* initial_step {step | transition | action} */ etisserant@1: SYM_LIST(sfc_network_c) etisserant@1: mario@97: /* INITIAL_STEP step_name ':' action_association_list END_STEP */ etisserant@1: SYM_REF2(initial_step_c, step_name, action_association_list) etisserant@1: mario@97: /* | action_association_list action_association ';' */ etisserant@1: SYM_LIST(action_association_list_c) mario@97: mario@97: /* STEP step_name ':' action_association_list END_STEP */ etisserant@1: SYM_REF2(step_c, step_name, action_association_list) mario@97: mario@97: /* action_name '(' action_qualifier indicator_name_list ')' */ mario@97: /* action_qualifier -> may be NULL ! */ mario@69: SYM_REF3(action_association_c, action_name, action_qualifier, indicator_name_list) etisserant@1: mario@97: /* N | R | S | P */ etisserant@1: SYM_TOKEN(qualifier_c) mario@97: mario@97: /* L | D | SD | DS | SL */ etisserant@1: SYM_TOKEN(timed_qualifier_c) etisserant@1: mario@97: /* | indicator_name_list ',' indicator_name */ etisserant@1: SYM_LIST(indicator_name_list_c) etisserant@1: mario@97: /* qualifier | timed_qualifier ',' action_time */ mario@97: /* action_time -> may be NULL ! */ etisserant@1: SYM_REF2(action_qualifier_c, action_qualifier, action_time) etisserant@1: mario@97: /* TRANSITION [transition_name] ['(' PRIORITY ASSIGN integer ')'] mario@97: * FROM steps TO steps mario@97: * transition_condition mario@97: * END_TRANSITION mario@97: */ mario@97: /* transition_name -> may be NULL ! */ mario@97: /* integer -> may be NULL ! */ lbessard@87: SYM_REF5(transition_c, transition_name, integer, from_steps, to_steps, transition_condition) lbessard@87: mario@97: /* ':' eol_list simple_instr_list | ASSIGN expression ';' */ mario@97: /* transition_condition_il -> may be NULL ! */ mario@97: /* transition_condition_st -> may be NULL ! */ lbessard@87: SYM_REF2(transition_condition_c, transition_condition_il, transition_condition_st) etisserant@1: mario@97: /* step_name | '(' step_name_list ')' */ mario@97: /* step_name -> may be NULL ! */ mario@97: /* step_name_list -> may be NULL ! */ etisserant@1: SYM_REF2(steps_c, step_name, step_name_list) etisserant@1: mario@97: /* | step_name_list ',' step_name */ etisserant@1: SYM_LIST(step_name_list_c) etisserant@1: mario@97: /* ACTION action_name ':' function_block_body END_ACTION */ etisserant@1: SYM_REF2(action_c, action_name, function_block_body) etisserant@0: etisserant@0: /********************************/ etisserant@0: /* B 1.7 Configuration elements */ etisserant@0: /********************************/ etisserant@0: etisserant@0: /* etisserant@0: CONFIGURATION configuration_name etisserant@0: optional_global_var_declarations etisserant@0: (resource_declaration_list | single_resource_declaration) etisserant@0: optional_access_declarations etisserant@0: optional_instance_specific_initializations etisserant@0: END_CONFIGURATION etisserant@0: */ msousa@738: /* 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 */ msousa@738: SYM_REF5(configuration_declaration_c, configuration_name, global_var_declarations, resource_declarations, access_declarations, instance_specific_initializations, enumvalue_symtable_t enumvalue_symtable;) etisserant@0: mjsousa@862: /* intermediate helper symbol for configuration_declaration */ mjsousa@862: /* { global_var_declarations_list } */ mjsousa@862: SYM_LIST(global_var_declarations_list_c) mjsousa@862: etisserant@0: /* helper symbol for configuration_declaration */ etisserant@0: SYM_LIST(resource_declaration_list_c) etisserant@0: etisserant@0: /* etisserant@0: RESOURCE resource_name ON resource_type_name etisserant@0: optional_global_var_declarations etisserant@0: single_resource_declaration etisserant@0: END_RESOURCE etisserant@0: */ msousa@738: /* 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 */ msousa@738: SYM_REF4(resource_declaration_c, resource_name, resource_type_name, global_var_declarations, resource_declaration, enumvalue_symtable_t enumvalue_symtable;) etisserant@0: etisserant@0: /* task_configuration_list program_configuration_list */ etisserant@0: SYM_REF2(single_resource_declaration_c, task_configuration_list, program_configuration_list) etisserant@0: etisserant@0: /* helper symbol for single_resource_declaration */ etisserant@0: SYM_LIST(task_configuration_list_c) etisserant@0: etisserant@0: /* helper symbol for single_resource_declaration */ etisserant@0: SYM_LIST(program_configuration_list_c) etisserant@0: etisserant@0: /* helper symbol for etisserant@0: * - access_path etisserant@0: * - instance_specific_init etisserant@0: */ etisserant@0: SYM_LIST(any_fb_name_list_c) etisserant@0: etisserant@0: /* [resource_name '.'] global_var_name ['.' structure_element_name] */ mario@69: SYM_REF3(global_var_reference_c, resource_name, global_var_name, structure_element_name) etisserant@0: etisserant@0: /* prev_declared_program_name '.' symbolic_variable */ etisserant@0: SYM_REF2(program_output_reference_c, program_name, symbolic_variable) etisserant@0: etisserant@0: /* TASK task_name task_initialization */ etisserant@0: SYM_REF2(task_configuration_c, task_name, task_initialization) etisserant@0: etisserant@0: /* '(' [SINGLE ASSIGN data_source ','] [INTERVAL ASSIGN data_source ','] PRIORITY ASSIGN integer ')' */ mario@69: SYM_REF3(task_initialization_c, single_data_source, interval_data_source, priority_data_source) etisserant@0: etisserant@0: /* PROGRAM [RETAIN | NON_RETAIN] program_name [WITH task_name] ':' program_type_name ['(' prog_conf_elements ')'] */ mario@69: SYM_REF5(program_configuration_c, retain_option, program_name, task_name, program_type_name, prog_conf_elements) etisserant@0: etisserant@0: /* prog_conf_elements ',' prog_conf_element */ etisserant@0: SYM_LIST(prog_conf_elements_c) etisserant@0: etisserant@0: /* fb_name WITH task_name */ etisserant@0: SYM_REF2(fb_task_c, fb_name, task_name) etisserant@0: etisserant@0: /* any_symbolic_variable ASSIGN prog_data_source */ etisserant@0: SYM_REF2(prog_cnxn_assign_c, symbolic_variable, prog_data_source) etisserant@0: etisserant@0: /* any_symbolic_variable SENDTO data_sink */ lbessard@28: SYM_REF2(prog_cnxn_sendto_c, symbolic_variable, data_sink) etisserant@0: etisserant@0: /* VAR_CONFIG instance_specific_init_list END_VAR */ mario@69: SYM_REF1(instance_specific_initializations_c, instance_specific_init_list) etisserant@0: etisserant@0: /* helper symbol for instance_specific_initializations */ etisserant@0: SYM_LIST(instance_specific_init_list_c) etisserant@0: etisserant@0: /* resource_name '.' program_name '.' {fb_name '.'} etisserant@0: ((variable_name [location] ':' located_var_spec_init) | (fb_name ':' fb_initialization)) etisserant@0: */ etisserant@0: SYM_REF6(instance_specific_init_c, resource_name, program_name, any_fb_name_list, variable_name, location, initialization) etisserant@0: etisserant@0: /* helper symbol for instance_specific_init */ etisserant@0: /* function_block_type_name ':=' structure_initialization */ etisserant@0: SYM_REF2(fb_initialization_c, function_block_type_name, structure_initialization) etisserant@0: etisserant@0: etisserant@0: etisserant@0: /****************************************/ etisserant@0: /* B.2 - Language IL (Instruction List) */ etisserant@0: /****************************************/ etisserant@0: /***********************************/ etisserant@0: /* B 2.1 Instructions and Operands */ etisserant@0: /***********************************/ etisserant@0: /*| instruction_list il_instruction */ etisserant@0: SYM_LIST(instruction_list_c) etisserant@0: etisserant@0: /* | label ':' [il_incomplete_instruction] eol_list */ msousa@672: /* NOTE: The parameters 'prev_il_instruction'/'next_il_instruction' are used to point to all previous/next il instructions that may be executed imedaitely before/after this instruction. msousa@672: * In case of an il instruction preceded by a label, the previous_il_instruction will include all IL instructions that jump to this label! msousa@443: * It is filled in by the flow_control_analysis_c during stage 3. msousa@685: * This will essentially be a doubly linked list of il_instruction_c and il_simple_instruction_c objects!! msousa@443: */ msousa@672: SYM_REF2(il_instruction_c, label, il_instruction, std::vector prev_il_instruction, next_il_instruction;) etisserant@0: etisserant@0: etisserant@0: /* | il_simple_operator [il_operand] */ etisserant@0: SYM_REF2(il_simple_operation_c, il_simple_operator, il_operand) etisserant@0: etisserant@0: /* | function_name [il_operand_list] */ msousa@438: /* NOTE: The parameter 'called_function_declaration', 'extensible_param_count' and 'candidate_functions' are used to pass data between the stage 3 and stage 4. laurent@399: * data between the stage 3 and stage 4. msousa@350: * See the comment above function_invocation_c for more details msousa@350: */ msousa@438: SYM_REF2(il_function_call_c, function_name, il_operand_list, symbol_c *called_function_declaration; int extensible_param_count; std::vector candidate_functions;) etisserant@0: etisserant@0: etisserant@0: /* | il_expr_operator '(' [il_operand] eol_list [simple_instr_list] ')' */ msousa@690: /* WARNING msousa@690: * The semantics of the il_expression_c.il_operand member is NOT what you may expect! msousa@690: * In order to simplify processing of the IL code, stage2 will prepend an artifical (and equivalent) 'LD ' IL instruction into the simple_instr_list msousa@690: * The il_expression_c.il_operand is maintained, in case we really need to handle it as a special case! msousa@690: * See the comments in iec_bison.yy for details and an example. msousa@690: */ mario@69: SYM_REF3(il_expression_c, il_expr_operator, il_operand, simple_instr_list) etisserant@0: etisserant@0: /* il_jump_operator label */ etisserant@0: SYM_REF2(il_jump_operation_c, il_jump_operator, label) etisserant@0: etisserant@0: /* il_call_operator prev_declared_fb_name etisserant@0: * | il_call_operator prev_declared_fb_name '(' ')' etisserant@0: * | il_call_operator prev_declared_fb_name '(' eol_list ')' etisserant@0: * | il_call_operator prev_declared_fb_name '(' il_operand_list ')' etisserant@0: * | il_call_operator prev_declared_fb_name '(' eol_list il_param_list ')' etisserant@0: */ msousa@439: /* NOTE: The parameter 'called_fb_declaration'is used to pass data between stage 3 and stage4 (although currently it is not used in stage 4 */ msousa@439: SYM_REF4(il_fb_call_c, il_call_operator, fb_name, il_operand_list, il_param_list, symbol_c *called_fb_declaration;) etisserant@0: etisserant@0: etisserant@0: /* | function_name '(' eol_list [il_param_list] ')' */ msousa@438: /* NOTE: The parameter 'called_function_declaration', 'extensible_param_count' and 'candidate_functions' are used to pass data between the stage 3 and stage 4. msousa@438: * See the comment above function_invocation_c for more details. msousa@438: */ msousa@438: SYM_REF2(il_formal_funct_call_c, function_name, il_param_list, symbol_c *called_function_declaration; int extensible_param_count; std::vector candidate_functions;) etisserant@0: etisserant@0: /* | il_operand_list ',' il_operand */ etisserant@0: SYM_LIST(il_operand_list_c) etisserant@0: etisserant@0: /* | simple_instr_list il_simple_instruction */ etisserant@0: SYM_LIST(simple_instr_list_c) etisserant@0: msousa@453: msousa@453: /* il_simple_instruction: msousa@453: * il_simple_operation eol_list msousa@453: * | il_expression eol_list msousa@453: * | il_formal_funct_call eol_list msousa@453: */ msousa@685: /* NOTE: The parameters 'prev_il_instruction'/'next_il_instruction' are used to point to all previous/next il instructions that may be executed imedaitely before/after this instruction. msousa@685: * In case of an il instruction preceded by a label, the previous_il_instruction will include all IL instructions that jump to this label! msousa@685: * It is filled in by the flow_control_analysis_c during stage 3. msousa@685: * This will essentially be a doubly linked list of il_instruction_c and il_simple_instruction_c objects!! msousa@685: */ msousa@685: SYM_REF1(il_simple_instruction_c, il_simple_instruction, std::vector prev_il_instruction, next_il_instruction;) msousa@453: etisserant@0: /* | il_initial_param_list il_param_instruction */ etisserant@0: SYM_LIST(il_param_list_c) etisserant@0: etisserant@0: /* il_assign_operator il_operand etisserant@0: * | il_assign_operator '(' eol_list simple_instr_list ')' etisserant@0: */ mario@69: SYM_REF3(il_param_assignment_c, il_assign_operator, il_operand, simple_instr_list) etisserant@0: etisserant@0: /* il_assign_out_operator variable */ etisserant@0: SYM_REF2(il_param_out_assignment_c, il_assign_out_operator, variable) etisserant@0: etisserant@0: etisserant@0: etisserant@0: /*******************/ etisserant@0: /* B 2.2 Operators */ etisserant@0: /*******************/ conti@476: /* NOTE: The parameter 'called_fb_declaration' is used to pass data between stage 3 and stage4 (although currently it is not used in stage 4 */ msousa@477: /* NOTE: The parameter 'deprecated_operation' indicates that the operation, with the specific data types being used, is currently defined msousa@478: * in the standard as being deprecated. This variable is filled in with the correct value in stage 3 (narrow_candidate_datatypes_c) msousa@477: * and currently only used in stage 3 (print_datatypes_error_c). msousa@477: */ etisserant@0: SYM_REF0(LD_operator_c) etisserant@0: SYM_REF0(LDN_operator_c) etisserant@0: SYM_REF0(ST_operator_c) etisserant@0: SYM_REF0(STN_operator_c) etisserant@0: SYM_REF0(NOT_operator_c) msousa@447: SYM_REF0(S_operator_c, symbol_c *called_fb_declaration;) msousa@447: SYM_REF0(R_operator_c, symbol_c *called_fb_declaration;) msousa@447: SYM_REF0(S1_operator_c, symbol_c *called_fb_declaration;) msousa@447: SYM_REF0(R1_operator_c, symbol_c *called_fb_declaration;) msousa@447: SYM_REF0(CLK_operator_c, symbol_c *called_fb_declaration;) msousa@447: SYM_REF0(CU_operator_c, symbol_c *called_fb_declaration;) msousa@447: SYM_REF0(CD_operator_c, symbol_c *called_fb_declaration;) msousa@447: SYM_REF0(PV_operator_c, symbol_c *called_fb_declaration;) msousa@447: SYM_REF0(IN_operator_c, symbol_c *called_fb_declaration;) msousa@447: SYM_REF0(PT_operator_c, symbol_c *called_fb_declaration;) etisserant@0: SYM_REF0(AND_operator_c) etisserant@0: SYM_REF0(OR_operator_c) etisserant@0: SYM_REF0(XOR_operator_c) etisserant@0: SYM_REF0(ANDN_operator_c) etisserant@0: SYM_REF0(ORN_operator_c) etisserant@0: SYM_REF0(XORN_operator_c) conti@476: SYM_REF0(ADD_operator_c, bool deprecated_operation;) conti@476: SYM_REF0(SUB_operator_c, bool deprecated_operation;) conti@476: SYM_REF0(MUL_operator_c, bool deprecated_operation;) conti@476: SYM_REF0(DIV_operator_c, bool deprecated_operation;) etisserant@0: SYM_REF0(MOD_operator_c) etisserant@0: SYM_REF0(GT_operator_c) etisserant@0: SYM_REF0(GE_operator_c) etisserant@0: SYM_REF0(EQ_operator_c) etisserant@0: SYM_REF0(LT_operator_c) etisserant@0: SYM_REF0(LE_operator_c) etisserant@0: SYM_REF0(NE_operator_c) etisserant@0: SYM_REF0(CAL_operator_c) etisserant@0: SYM_REF0(CALC_operator_c) etisserant@0: SYM_REF0(CALCN_operator_c) etisserant@0: SYM_REF0(RET_operator_c) etisserant@0: SYM_REF0(RETC_operator_c) etisserant@0: SYM_REF0(RETCN_operator_c) etisserant@0: SYM_REF0(JMP_operator_c) etisserant@0: SYM_REF0(JMPC_operator_c) etisserant@0: SYM_REF0(JMPCN_operator_c) etisserant@0: lbessard@143: /* any_identifier ASSIGN */ lbessard@143: SYM_REF1(il_assign_operator_c, variable_name) lbessard@143: etisserant@0: /*| [NOT] any_identifier SENDTO */ etisserant@0: SYM_REF2(il_assign_out_operator_c, option, variable_name) etisserant@0: etisserant@0: etisserant@0: etisserant@0: /***************************************/ etisserant@0: /* B.3 - Language ST (Structured Text) */ etisserant@0: /***************************************/ etisserant@0: /***********************/ etisserant@0: /* B 3.1 - Expressions */ etisserant@0: /***********************/ mjsousa@936: SYM_REF1( ref_expression_c, exp) /* an extension to the IEC 61131-3 standard - based on the IEC 61131-3 v3 standard. REF() -> returns address of the varible! */ mjsousa@936: SYM_REF1(deref_expression_c, exp) /* an extension to the IEC 61131-3 standard - based on the IEC 61131-3 v3 standard. DREF() -> dereferences an address! */ mjsousa@936: SYM_REF1(deref_operator_c, exp) /* an extension to the IEC 61131-3 standard - based on the IEC 61131-3 v3 standard. ^ -> dereferences an address! */ mjsousa@933: SYM_REF2( or_expression_c, l_exp, r_exp) etisserant@0: SYM_REF2(xor_expression_c, l_exp, r_exp) etisserant@0: SYM_REF2(and_expression_c, l_exp, r_exp) etisserant@0: SYM_REF2(equ_expression_c, l_exp, r_exp) etisserant@0: SYM_REF2(notequ_expression_c, l_exp, r_exp) mjsousa@933: SYM_REF2( lt_expression_c, l_exp, r_exp) mjsousa@933: SYM_REF2( gt_expression_c, l_exp, r_exp) mjsousa@933: SYM_REF2( le_expression_c, l_exp, r_exp) mjsousa@933: SYM_REF2( ge_expression_c, l_exp, r_exp) conti@476: SYM_REF2(add_expression_c, l_exp, r_exp, bool deprecated_operation;) conti@476: SYM_REF2(sub_expression_c, l_exp, r_exp, bool deprecated_operation;) conti@476: SYM_REF2(mul_expression_c, l_exp, r_exp, bool deprecated_operation;) conti@476: SYM_REF2(div_expression_c, l_exp, r_exp, bool deprecated_operation;) etisserant@0: SYM_REF2(mod_expression_c, l_exp, r_exp) etisserant@0: SYM_REF2(power_expression_c, l_exp, r_exp) mario@69: SYM_REF1(neg_expression_c, exp) mario@69: SYM_REF1(not_expression_c, exp) etisserant@0: ccb@202: /* formal_param_list -> may be NULL ! */ ccb@202: /* nonformal_param_list -> may be NULL ! */ msousa@420: /* NOTES: msousa@420: * The parameter 'called_function_declaration'... msousa@420: * ...is used to pass data between the stage 3 and stage 4. msousa@350: * The IEC 61131-3 standard allows for overloaded standard functions. This means that some msousa@417: * function calls are not completely defined by the name of the function being called, msousa@350: * and need to be disambiguated with using the data types of the parameters being passed. msousa@417: * Stage 3 does this to verify semantic correctness. msousa@350: * Stage 4 also needs to do this in order to determine which function to call. msousa@350: * It does not make sense to determine the exact function being called twice (once in stage 3, msousa@417: * and again in stage 4), so stage 3 will store this info in the parameter called_function_declaration msousa@350: * for stage 4 to use it later on. msousa@420: * The parameter 'candidate_functions'... msousa@420: * ...is used to pass data between two passes within stage 3 msousa@420: * (actually between fill_candidate_datatypes_c and narrow_candidate_datatypes_c). msousa@420: * It is used to store all the functions that may be legally called with the current parameters msousa@420: * being used in this function invocation. Note that the standard includes some standard functions msousa@420: * that have the exact same input parameter types, but return different data types. msousa@420: * In order to determine which of these functions should be called, we first create a list msousa@420: * of all possible functions, and then narrow down the list (hopefully down to 1 function) msousa@420: * once we know the data type that the function invocation must return (this will take into msousa@420: * account the expression in which the function invocation is inserted/occurs). msousa@421: * The 'called_function_declaration' will eventually be set (in stage 3) to one of msousa@421: * the functions in the 'candidate_functions' list! msousa@420: * The parameter 'extensible_param_count'... msousa@420: * ...is used to pass data between the stage 3 and stage 4. msousa@420: * The IEC 61131-3 standard allows for extensible standard functions. This means that some msousa@420: * standard functions may be called with a variable number of paramters. Stage 3 will store msousa@420: * in extensible_param_count the number of parameters being passed to the extensible parameter. msousa@420: */ msousa@420: SYM_REF3(function_invocation_c, function_name, formal_param_list, nonformal_param_list, symbol_c *called_function_declaration; int extensible_param_count; std::vector candidate_functions;) etisserant@0: etisserant@0: etisserant@0: /********************/ etisserant@0: /* B 3.2 Statements */ etisserant@0: /********************/ etisserant@0: SYM_LIST(statement_list_c) etisserant@0: etisserant@0: etisserant@0: /*********************************/ etisserant@0: /* B 3.2.1 Assignment Statements */ etisserant@0: /*********************************/ etisserant@0: SYM_REF2(assignment_statement_c, l_exp, r_exp) etisserant@0: etisserant@0: etisserant@0: /*****************************************/ etisserant@0: /* B 3.2.2 Subprogram Control Statements */ etisserant@0: /*****************************************/ lbessard@143: etisserant@0: /* RETURN */ etisserant@0: SYM_REF0(return_statement_c) etisserant@0: etisserant@0: /* fb_name '(' [param_assignment_list] ')' */ ccb@202: /* formal_param_list -> may be NULL ! */ ccb@202: /* nonformal_param_list -> may be NULL ! */ msousa@439: /* NOTE: The parameter 'called_fb_declaration'is used to pass data between stage 3 and stage4 (although currently it is not used in stage 4 */ msousa@424: SYM_REF3(fb_invocation_c, fb_name, formal_param_list, nonformal_param_list, symbol_c *called_fb_declaration;) etisserant@0: etisserant@0: /* helper symbol for fb_invocation */ etisserant@0: /* param_assignment_list ',' param_assignment */ etisserant@0: SYM_LIST(param_assignment_list_c) etisserant@0: etisserant@0: /* variable_name ASSIGN expression */ etisserant@0: SYM_REF2(input_variable_param_assignment_c, variable_name, expression) etisserant@0: etisserant@0: /* [NOT] variable_name '=>' variable */ mario@69: SYM_REF3(output_variable_param_assignment_c, not_param, variable_name, variable) etisserant@0: etisserant@0: /* helper CLASS for output_variable_param_assignment */ etisserant@0: SYM_REF0(not_paramassign_c) etisserant@0: etisserant@0: etisserant@0: /********************************/ etisserant@0: /* B 3.2.3 Selection Statements */ etisserant@0: /********************************/ etisserant@0: /* IF expression THEN statement_list elseif_statement_list ELSE statement_list END_IF */ etisserant@0: SYM_REF4(if_statement_c, expression, statement_list, elseif_statement_list, else_statement_list) etisserant@0: etisserant@0: /* helper symbol for if_statement */ etisserant@0: SYM_LIST(elseif_statement_list_c) etisserant@0: etisserant@0: /* helper symbol for elseif_statement_list */ etisserant@0: /* ELSIF expression THEN statement_list */ etisserant@0: SYM_REF2(elseif_statement_c, expression, statement_list) etisserant@0: etisserant@0: /* CASE expression OF case_element_list ELSE statement_list END_CASE */ mario@69: SYM_REF3(case_statement_c, expression, case_element_list, statement_list) etisserant@0: etisserant@0: /* helper symbol for case_statement */ etisserant@0: SYM_LIST(case_element_list_c) etisserant@0: etisserant@0: /* case_list ':' statement_list */ etisserant@0: SYM_REF2(case_element_c, case_list, statement_list) etisserant@0: etisserant@0: SYM_LIST(case_list_c) etisserant@0: etisserant@0: etisserant@0: /********************************/ etisserant@0: /* B 3.2.4 Iteration Statements */ etisserant@0: /********************************/ etisserant@0: /* FOR control_variable ASSIGN expression TO expression [BY expression] DO statement_list END_FOR */ mario@69: SYM_REF5(for_statement_c, control_variable, beg_expression, end_expression, by_expression, statement_list) etisserant@0: etisserant@0: /* WHILE expression DO statement_list END_WHILE */ etisserant@0: SYM_REF2(while_statement_c, expression, statement_list) etisserant@0: etisserant@0: /* REPEAT statement_list UNTIL expression END_REPEAT */ etisserant@0: SYM_REF2(repeat_statement_c, statement_list, expression) etisserant@0: etisserant@0: /* EXIT */ etisserant@0: SYM_REF0(exit_statement_c) etisserant@0: etisserant@0: