/*
* matiec - a compiler for the programming languages defined in IEC 61131-3
*
* Copyright (C) 2003-2012 Mario de Sousa (msousa@fe.up.pt)
* Copyright (C) 2007-2011 Laurent Bessard and Edouard Tisserant
*
* 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)
*
*/
/* Determine the data type on which another data type is based on.
* If a new default initial value is given, we DO NOT consider it a
* new base class, and continue looking further!
*
* E.g. TYPE new_int_t : INT; END_TYPE;
* TYPE new_int2_t : INT = 2; END_TYPE;
* TYPE new_subr_t : INT (4..5); END_TYPE;
*
* new_int_t is really an INT!!
* new_int2_t is also really an INT!!
* new_subr_t is also really an INT!!
*
* Note that a FB declaration is also considered a base type, as
* we may have FB instances declared of a specific FB type.
*/
class search_base_type_c: public null_visitor_c {
private:
symbol_c *current_type_name;
symbol_c *current_basetype;
bool is_array;
bool is_subrange;
bool is_enumerated;
bool is_fb;
static search_base_type_c *search_base_type_singleton; // Make this a singleton class!
private:
static void create_singleton(void);
public:
search_base_type_c(void);
static symbol_c *get_basetype_decl (symbol_c *symbol);
static symbol_c *get_basetype_id (symbol_c *symbol);
static bool type_is_subrange (symbol_c *type_decl);
static bool type_is_enumerated(symbol_c *type_decl);
static bool type_is_fb (symbol_c *type_decl);
public:
/*************************/
/* B.1 - Common elements */
/*************************/
/*******************************************/
/* B 1.1 - Letters, digits and identifiers */
/*******************************************/
void *visit(identifier_c *type_name);
/*********************/
/* B 1.2 - Constants */
/*********************/
/******************************/
/* B 1.2.1 - Numeric Literals */
/******************************/
/* Numeric literals without any explicit type cast have unknown data type,
* so we continue considering them as their own basic data types until
* they can be resolved (for example, when using '30+x' where 'x' is a LINT variable, the
* numeric literal '30' must then be considered a LINT so the ADD function may be called
* with all inputs of the same data type.
* If 'x' were a SINT, then the '30' would have to be a SINT too!
*/
void *visit(real_c *symbol);
void *visit(neg_real_c *symbol);
void *visit(integer_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(boolean_true_c *symbol);
void *visit(boolean_false_c *symbol);
/***********************************/
/* B 1.3.1 - Elementary Data Types */
/***********************************/
void *visit(time_type_name_c *symbol);
void *visit(bool_type_name_c *symbol);
void *visit(sint_type_name_c *symbol);
void *visit(int_type_name_c *symbol);
void *visit(dint_type_name_c *symbol);
void *visit(lint_type_name_c *symbol);
void *visit(usint_type_name_c *symbol);
void *visit(uint_type_name_c *symbol);
void *visit(udint_type_name_c *symbol);
void *visit(ulint_type_name_c *symbol);
void *visit(real_type_name_c *symbol);
void *visit(lreal_type_name_c *symbol);
void *visit(date_type_name_c *symbol);
void *visit(tod_type_name_c *symbol);
void *visit(dt_type_name_c *symbol);
void *visit(byte_type_name_c *symbol);
void *visit(word_type_name_c *symbol);
void *visit(dword_type_name_c *symbol);
void *visit(lword_type_name_c *symbol);
void *visit(string_type_name_c *symbol);
void *visit(wstring_type_name_c *symbol);
/******************************************************/
/* Extensions to the base standard as defined in */
/* "Safety Software Technical Specification, */
/* Part 1: Concepts and Function Blocks, */
/* Version 1.0 – Official Release" */
/* by PLCopen - Technical Committee 5 - 2006-01-31 */
/******************************************************/
void *visit(safetime_type_name_c *symbol);
void *visit(safebool_type_name_c *symbol);
void *visit(safesint_type_name_c *symbol);
void *visit(safeint_type_name_c *symbol);
void *visit(safedint_type_name_c *symbol);
void *visit(safelint_type_name_c *symbol);
void *visit(safeusint_type_name_c *symbol);
void *visit(safeuint_type_name_c *symbol);
void *visit(safeudint_type_name_c *symbol);
void *visit(safeulint_type_name_c *symbol);
void *visit(safereal_type_name_c *symbol);
void *visit(safelreal_type_name_c *symbol);
void *visit(safedate_type_name_c *symbol);
void *visit(safetod_type_name_c *symbol);
void *visit(safedt_type_name_c *symbol);
void *visit(safebyte_type_name_c *symbol);
void *visit(safeword_type_name_c *symbol);
void *visit(safedword_type_name_c *symbol);
void *visit(safelword_type_name_c *symbol);
void *visit(safestring_type_name_c *symbol);
void *visit(safewstring_type_name_c *symbol);
/********************************/
/* B 1.3.3 - Derived data types */
/********************************/
/* simple_type_name ':' simple_spec_init */
void *visit(simple_type_declaration_c *symbol);
/* simple_specification ASSIGN constant */
void *visit(simple_spec_init_c *symbol);
/* subrange_type_name ':' subrange_spec_init */
void *visit(subrange_type_declaration_c *symbol);
/* subrange_specification ASSIGN signed_integer */
void *visit(subrange_spec_init_c *symbol);
/* integer_type_name '(' subrange')' */
void *visit(subrange_specification_c *symbol);
/* signed_integer DOTDOT signed_integer */
void *visit(subrange_c *symbol);
/* enumerated_type_name ':' enumerated_spec_init */
void *visit(enumerated_type_declaration_c *symbol);
/* enumerated_specification ASSIGN enumerated_value */
void *visit(enumerated_spec_init_c *symbol);
/* helper symbol for enumerated_specification->enumerated_spec_init */
/* enumerated_value_list ',' enumerated_value */
void *visit(enumerated_value_list_c *symbol);
/* enumerated_type_name '#' identifier */
// SYM_REF2(enumerated_value_c, type, value)
void *visit(enumerated_value_c *symbol);
/* identifier ':' array_spec_init */
void *visit(array_type_declaration_c *symbol);
/* array_specification [ASSIGN array_initialization} */
/* array_initialization may be NULL ! */
void *visit(array_spec_init_c *symbol);
/* ARRAY '[' array_subrange_list ']' OF non_generic_type_name */
void *visit(array_specification_c *symbol);
/* helper symbol for array_specification */
/* array_subrange_list ',' subrange */
void *visit(array_subrange_list_c *symbol);
/* array_initialization: '[' array_initial_elements_list ']' */
/* helper symbol for array_initialization */
/* array_initial_elements_list ',' array_initial_elements */
void *visit(array_initial_elements_list_c *symbol);
/* integer '(' [array_initial_element] ')' */
/* array_initial_element may be NULL ! */
void *visit(array_initial_elements_c *symbol);
/* structure_type_name ':' structure_specification */
/* NOTE: structure_specification will point to either a
* initialized_structure_c
* OR A
* structure_element_declaration_list_c
*/
void *visit(structure_type_declaration_c *symbol);
/* var1_list ':' structure_type_name */
void *visit(structured_var_declaration_c *symbol);
/* structure_type_name ASSIGN structure_initialization */
/* structure_initialization may be NULL ! */
void *visit(initialized_structure_c *symbol);
/* helper symbol for structure_declaration */
/* structure_declaration: STRUCT structure_element_declaration_list END_STRUCT */
/* structure_element_declaration_list structure_element_declaration ';' */
void *visit(structure_element_declaration_list_c *symbol);
/* structure_element_name ':' *_spec_init */
void *visit(structure_element_declaration_c *symbol);
/* helper symbol for structure_initialization */
/* structure_initialization: '(' structure_element_initialization_list ')' */
/* structure_element_initialization_list ',' structure_element_initialization */
void *visit(structure_element_initialization_list_c *symbol);
/* structure_element_name ASSIGN value */
void *visit(structure_element_initialization_c *symbol);
/* string_type_name ':' elementary_string_type_name string_type_declaration_size string_type_declaration_init */
/*
SYM_REF4(string_type_declaration_c, string_type_name,
elementary_string_type_name,
string_type_declaration_size,
string_type_declaration_init) // may be == NULL!
*/
void *visit(string_type_declaration_c *symbol);
/*****************************/
/* B 1.5.2 - Function Blocks */
/*****************************/
/* FUNCTION_BLOCK derived_function_block_name io_OR_other_var_declarations function_block_body END_FUNCTION_BLOCK */
// SYM_REF3(function_block_declaration_c, fblock_name, var_declarations, fblock_body)
void *visit(function_block_declaration_c *symbol);
/*********************************************/
/* B.1.6 Sequential function chart elements */
/*********************************************/
/* INITIAL_STEP step_name ':' action_association_list END_STEP */
// SYM_REF2(initial_step_c, step_name, action_association_list)
void *visit(initial_step_c *symbol);
/* STEP step_name ':' action_association_list END_STEP */
// SYM_REF2(step_c, step_name, action_association_list)
void *visit(step_c *symbol);
}; // search_base_type_c