author | greg |
Wed, 28 Oct 2009 13:50:56 +0100 | |
changeset 213 | f386d870e8e4 |
parent 202 | da1a8186f86f |
child 257 | 90782e241346 |
permissions | -rw-r--r-- |
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/* |
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* (c) 2003 Mario de Sousa |
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* |
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* Offered to the public under the terms of the GNU General Public License |
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* as published by the Free Software Foundation; either version 2 of the |
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* License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
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* Public License for more details. |
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* |
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* This code is made available on the understanding that it will not be |
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* used in safety-critical situations without a full and competent review. |
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*/ |
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/* |
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* An IEC 61131-3 IL and ST compiler. |
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* |
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* Based on the |
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* FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10) |
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* |
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*/ |
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/* Determine the data type on which another data type is based on. |
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* If a new default initial value is given, we DO NOT consider it a |
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* new base class, and continue looking further! |
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* |
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* E.g. TYPE new_int_t : INT; END_TYPE; |
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* TYPE new_int2_t : INT = 2; END_TYPE; |
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* TYPE new_subr_t : INT (4..5); END_TYPE; |
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* |
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* new_int_t is really an INT!! |
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* new_int2_t is also really an INT!! |
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* new_subr_t is also really an INT!! |
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* |
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* Note that a FB declaration is also considered a base type, as |
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* we may have FB instances declared of a specific FB type. |
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*/ |
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class search_base_type_c: public null_visitor_c { |
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private: |
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symbol_c *current_type_name; |
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bool is_subrange; |
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bool is_enumerated; |
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public: |
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search_base_type_c(void); |
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public: |
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void *visit(identifier_c *type_name); |
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bool type_is_subrange(symbol_c* type_decl); |
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bool type_is_enumerated(symbol_c* type_decl); |
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public: |
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/*********************/ |
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/* B 1.2 - Constants */ |
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/*********************/ |
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/******************************/ |
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/* B 1.2.1 - Numeric Literals */ |
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/******************************/ |
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/* Numeric literals without any explicit type cast have unknown data type, |
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* so we continue considering them as their own basic data types until |
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* they can be resolved (for example, when using '30+x' where 'x' is a LINT variable, the |
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* numeric literal '30' must then be considered a LINT so the ADD function may be called |
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* with all inputs of the same data type. |
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* If 'x' were a SINT, then the '30' would have to be a SINT too! |
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*/ |
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void *visit(real_c *symbol); |
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void *visit(integer_c *symbol); |
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void *visit(binary_integer_c *symbol); |
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void *visit(octal_integer_c *symbol); |
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void *visit(hex_integer_c *symbol); |
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/***********************************/ |
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/* B 1.3.1 - Elementary Data Types */ |
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/***********************************/ |
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void *visit(time_type_name_c *symbol); |
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void *visit(bool_type_name_c *symbol); |
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void *visit(sint_type_name_c *symbol); |
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void *visit(int_type_name_c *symbol); |
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void *visit(dint_type_name_c *symbol); |
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void *visit(lint_type_name_c *symbol); |
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void *visit(usint_type_name_c *symbol); |
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void *visit(uint_type_name_c *symbol); |
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void *visit(udint_type_name_c *symbol); |
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void *visit(ulint_type_name_c *symbol); |
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void *visit(real_type_name_c *symbol); |
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void *visit(lreal_type_name_c *symbol); |
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void *visit(date_type_name_c *symbol); |
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void *visit(tod_type_name_c *symbol); |
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void *visit(dt_type_name_c *symbol) ; |
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void *visit(byte_type_name_c *symbol); |
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void *visit(word_type_name_c *symbol); |
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void *visit(dword_type_name_c *symbol); |
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void *visit(lword_type_name_c *symbol); |
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void *visit(string_type_name_c *symbol); |
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void *visit(wstring_type_name_c *symbol); |
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/* |
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void *visit(constant_int_type_name_c *symbol); |
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void *visit(constant_real_type_name_c *symbol); |
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*/ |
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/******************************************************/ |
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/* Extensions to the base standard as defined in */ |
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/* "Safety Software Technical Specification, */ |
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/* Part 1: Concepts and Function Blocks, */ |
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/* Version 1.0 – Official Release" */ |
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/* by PLCopen - Technical Committee 5 - 2006-01-31 */ |
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/******************************************************/ |
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void *visit(safebool_type_name_c *symbol); |
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/********************************/ |
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/* B 1.3.3 - Derived data types */ |
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/********************************/ |
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/* simple_type_name ':' simple_spec_init */ |
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void *visit(simple_type_declaration_c *symbol); |
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/* simple_specification ASSIGN constant */ |
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void *visit(simple_spec_init_c *symbol); |
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/* subrange_type_name ':' subrange_spec_init */ |
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void *visit(subrange_type_declaration_c *symbol); |
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/* subrange_specification ASSIGN signed_integer */ |
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void *visit(subrange_spec_init_c *symbol); |
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/* integer_type_name '(' subrange')' */ |
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void *visit(subrange_specification_c *symbol); |
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/* signed_integer DOTDOT signed_integer */ |
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void *visit(subrange_c *symbol); |
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/* enumerated_type_name ':' enumerated_spec_init */ |
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void *visit(enumerated_type_declaration_c *symbol); |
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/* enumerated_specification ASSIGN enumerated_value */ |
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void *visit(enumerated_spec_init_c *symbol); |
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/* helper symbol for enumerated_specification->enumerated_spec_init */ |
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/* enumerated_value_list ',' enumerated_value */ |
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void *visit(enumerated_value_list_c *symbol); |
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/* enumerated_type_name '#' identifier */ |
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// SYM_REF2(enumerated_value_c, type, value) |
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void *visit(enumerated_value_c *symbol); |
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/* identifier ':' array_spec_init */ |
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void *visit(array_type_declaration_c *symbol); |
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/* array_specification [ASSIGN array_initialization} */ |
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/* array_initialization may be NULL ! */ |
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void *visit(array_spec_init_c *symbol); |
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/* ARRAY '[' array_subrange_list ']' OF non_generic_type_name */ |
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void *visit(array_specification_c *symbol); |
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/* helper symbol for array_specification */ |
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/* array_subrange_list ',' subrange */ |
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void *visit(array_subrange_list_c *symbol); |
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/* array_initialization: '[' array_initial_elements_list ']' */ |
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/* helper symbol for array_initialization */ |
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/* array_initial_elements_list ',' array_initial_elements */ |
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void *visit(array_initial_elements_list_c *symbol); |
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/* integer '(' [array_initial_element] ')' */ |
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/* array_initial_element may be NULL ! */ |
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void *visit(array_initial_elements_c *symbol); |
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/* structure_type_name ':' structure_specification */ |
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/* NOTE: structure_specification will point to either a |
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* initialized_structure_c |
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* OR A |
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* structure_element_declaration_list_c |
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*/ |
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void *visit(structure_type_declaration_c *symbol); |
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/* structure_type_name ASSIGN structure_initialization */ |
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/* structure_initialization may be NULL ! */ |
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void *visit(initialized_structure_c *symbol); |
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/* helper symbol for structure_declaration */ |
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/* structure_declaration: STRUCT structure_element_declaration_list END_STRUCT */ |
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/* structure_element_declaration_list structure_element_declaration ';' */ |
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void *visit(structure_element_declaration_list_c *symbol); |
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/* structure_element_name ':' *_spec_init */ |
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void *visit(structure_element_declaration_c *symbol); |
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/* helper symbol for structure_initialization */ |
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/* structure_initialization: '(' structure_element_initialization_list ')' */ |
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/* structure_element_initialization_list ',' structure_element_initialization */ |
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void *visit(structure_element_initialization_list_c *symbol); |
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/* structure_element_name ASSIGN value */ |
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void *visit(structure_element_initialization_c *symbol); |
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/* string_type_name ':' elementary_string_type_name string_type_declaration_size string_type_declaration_init */ |
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/* |
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SYM_REF4(string_type_declaration_c, string_type_name, |
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elementary_string_type_name, |
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string_type_declaration_size, |
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string_type_declaration_init) // may be == NULL! |
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*/ |
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void *visit(string_type_declaration_c *symbol); |
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/*****************************/ |
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/* B 1.5.2 - Function Blocks */ |
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/*****************************/ |
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/* FUNCTION_BLOCK derived_function_block_name io_OR_other_var_declarations function_block_body END_FUNCTION_BLOCK */ |
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// SYM_REF3(function_block_declaration_c, fblock_name, var_declarations, fblock_body) |
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void *visit(function_block_declaration_c *symbol); |
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}; // search_base_type_c |
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