diff -r 64334c5a00b1 -r 38d6eb056260 absyntax_utils/search_base_type.hh --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/absyntax_utils/search_base_type.hh Mon Jun 01 21:08:44 2009 +0200 @@ -0,0 +1,170 @@ +/* + * (c) 2003 Mario de Sousa + * + * Offered to the public under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 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. + * + * 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 IL and ST 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!! + */ + + +class search_base_type_c: public null_visitor_c { + + private: + symbol_c *current_type_name; + bool is_subrange; + bool is_enumerated; + + public: + search_base_type_c(void); + + public: + void *visit(identifier_c *type_name); + bool type_is_subrange(symbol_c* type_decl); + bool type_is_enumerated(symbol_c* type_decl); + + public: + /***********************************/ + /* 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); + void *visit(constant_int_type_name_c *symbol); + void *visit(constant_real_type_name_c *symbol); + void *visit(direct_variable_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(safebool_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); + /* 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); +}; // search_base_type_c + + + +