--- a/stage3/fill_candidate_datatypes.cc Tue Aug 20 11:11:09 2013 +0100
+++ b/stage3/fill_candidate_datatypes.cc Tue Aug 20 11:15:40 2013 +0100
@@ -555,17 +555,13 @@
* CU counter_var
*/
void *fill_candidate_datatypes_c::handle_implicit_il_fb_call(symbol_c *il_instruction, const char *param_name, symbol_c *&called_fb_declaration) {
- symbol_c *fb_type_id = search_varfb_instance_type->get_basetype_id(il_operand);
- /* Although a call to a non-declared FB is a semantic error, this is currently caught by stage 2! */
- if (NULL == fb_type_id) ERROR;
-
- function_block_declaration_c *fb_decl = function_block_type_symtable.find_value(fb_type_id);
- if (function_block_type_symtable.end_value() == fb_decl)
- /* The il_operand is not the name of a FB instance. Most probably it is the name of a variable of some other type.
- * this is a semantic error.
- */
- fb_decl = NULL;
-
+ symbol_c *fb_decl = (NULL == il_operand)? NULL : search_varfb_instance_type->get_basetype_decl(il_operand);
+ if (! get_datatype_info_c::is_function_block(fb_decl)) fb_decl = NULL;
+
+ /* Although a call to a non-declared FB is a semantic error, this is currently caught by stage 2! */
+ /* However, when calling using the 'S' and 'R' operators, this error is not caught by stage 2, as these operators have two possible semantics */
+ // if (NULL == fb_type_id) ERROR;
+
/* The narrow_candidate_datatypes_c does not rely on this called_fb_declaration pointer being == NULL to conclude that
* we have a datatype incompatibility error, so we set it to fb_decl to allow the print_datatype_error_c to print out
* more informative error messages!
@@ -594,10 +590,54 @@
+
+/* handle the S and R IL operators... */
+/* operator_str should be set to either "S" or "R" */
+void *fill_candidate_datatypes_c::handle_S_and_R_operator(symbol_c *symbol, const char *operator_str, symbol_c *&called_fb_declaration) {
+ /* NOTE: this operator has two possible semantic meanings:
+ * - Set/Reset the BOOL operand variable to true
+ * - call the FB specified by the operand.
+ * Which of the two semantics will have to be determined by the datatype of the operand!
+ */
+ symbol_c *prev_instruction_type, *operand_type;
+
+ if (NULL == prev_il_instruction) return NULL;
+ if (NULL == il_operand) return NULL;
+
+ for (unsigned int i = 0; i < prev_il_instruction->candidate_datatypes.size(); i++) {
+ for(unsigned int j = 0; j < il_operand->candidate_datatypes.size(); j++) {
+ prev_instruction_type = prev_il_instruction->candidate_datatypes[i];
+ operand_type = il_operand->candidate_datatypes[j];
+ /* IEC61131-3, Table 52, Note (e) states that the datatype of the operand must be BOOL!
+ * IEC61131-3, Table 52, line 3 states that this operator should "Set operand to 1 if current result is Boolean 1"
+ * which implies that the prev_instruction_type MUST also be BOOL compatible.
+ */
+ if (get_datatype_info_c::is_BOOL_compatible(prev_instruction_type) && get_datatype_info_c::is_BOOL_compatible(operand_type))
+ add_datatype_to_candidate_list(symbol, prev_instruction_type);
+ }
+ }
+
+ /* if the appropriate semantics is not a Set/Reset of a boolean variable, the we try for the FB invocation! */
+ if (symbol->candidate_datatypes.size() == 0)
+ handle_implicit_il_fb_call(symbol, operator_str, called_fb_declaration);
+
+ /* If it is also not a valid FB call, make sure the candidate_datatypes is empty (handle_implicit_il_fb_call may leave it non-empty!!) */
+ /* From here on out, all later code will consider the symbol->called_fb_declaration being NULL as an indication that this operator must use the
+ * Set/Reset semantics, so we must also guarantee that the remainder of the state of this symbol is compatible with that assumption!
+ */
+ if (NULL == called_fb_declaration)
+ symbol->candidate_datatypes.clear();
+
+ if (debug) std::cout << operator_str << " [" << prev_il_instruction->candidate_datatypes.size() << "," << il_operand->candidate_datatypes.size() << "] ==> " << symbol->candidate_datatypes.size() << " result.\n";
+ return NULL;
+}
+
+
+
/* handle a binary IL operator, like ADD, SUB, etc... */
void *fill_candidate_datatypes_c::handle_binary_operator(const struct widen_entry widen_table[], symbol_c *symbol, symbol_c *l_expr, symbol_c *r_expr) {
- if (NULL == l_expr) /* if no prev_il_instruction */
- return NULL;
+ if (NULL == l_expr) return NULL; /* if no prev_il_instruction */
+ if (NULL == r_expr) return NULL; /* if no IL operand!! */
for(unsigned int i = 0; i < l_expr->candidate_datatypes.size(); i++)
for(unsigned int j = 0; j < r_expr->candidate_datatypes.size(); j++)
@@ -1553,21 +1593,11 @@
* | il_call_operator prev_declared_fb_name '(' il_operand_list ')'
* | il_call_operator prev_declared_fb_name '(' eol_list il_param_list ')'
*/
-/* 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 */
+/* NOTE: The parameter 'called_fb_declaration'is used to pass data between stage 3 and stage4 */
// SYM_REF4(il_fb_call_c, il_call_operator, fb_name, il_operand_list, il_param_list, symbol_c *called_fb_declaration)
void *fill_candidate_datatypes_c::visit(il_fb_call_c *symbol) {
- /* We do not call
- * fb_decl = search_varfb_instance_type->get_basetype_decl(symbol->fb_name);
- * because we want to make sure it is a FB instance, and not some other data type...
- */
- symbol_c *fb_type_id = search_varfb_instance_type->get_basetype_id(symbol->fb_name);
- /* Although a call to a non-declared FB is a semantic error, this is currently caught by stage 2! */
- if (NULL == fb_type_id) ERROR;
-
- function_block_declaration_c *fb_decl = function_block_type_symtable.find_value(fb_type_id);
- if (function_block_type_symtable.end_value() == fb_decl)
- /* The fb_name not the name of a FB instance. Most probably it is the name of a variable of some other type. */
- fb_decl = NULL;
+ symbol_c *fb_decl = search_varfb_instance_type->get_basetype_decl(symbol->fb_name);
+ if (! get_datatype_info_c::is_function_block(fb_decl)) fb_decl = NULL;
/* Although a call to a non-declared FB is a semantic error, this is currently caught by stage 2! */
if (NULL == fb_decl) ERROR;
@@ -1664,6 +1694,7 @@
/* B 2.2 Operators */
/*******************/
void *fill_candidate_datatypes_c::visit(LD_operator_c *symbol) {
+ if (NULL == il_operand) return NULL;
for(unsigned int i = 0; i < il_operand->candidate_datatypes.size(); i++) {
add_datatype_to_candidate_list(symbol, il_operand->candidate_datatypes[i]);
}
@@ -1672,6 +1703,7 @@
}
void *fill_candidate_datatypes_c::visit(LDN_operator_c *symbol) {
+ if (NULL == il_operand) return NULL;
for(unsigned int i = 0; i < il_operand->candidate_datatypes.size(); i++) {
if (get_datatype_info_c::is_ANY_BIT_compatible(il_operand->candidate_datatypes[i]))
add_datatype_to_candidate_list(symbol, il_operand->candidate_datatypes[i]);
@@ -1684,6 +1716,7 @@
symbol_c *prev_instruction_type, *operand_type;
if (NULL == prev_il_instruction) return NULL;
+ if (NULL == il_operand) return NULL;
for (unsigned int i = 0; i < prev_il_instruction->candidate_datatypes.size(); i++) {
for(unsigned int j = 0; j < il_operand->candidate_datatypes.size(); j++) {
prev_instruction_type = prev_il_instruction->candidate_datatypes[i];
@@ -1700,6 +1733,7 @@
symbol_c *prev_instruction_type, *operand_type;
if (NULL == prev_il_instruction) return NULL;
+ if (NULL == il_operand) return NULL;
for (unsigned int i = 0; i < prev_il_instruction->candidate_datatypes.size(); i++) {
for(unsigned int j = 0; j < il_operand->candidate_datatypes.size(); j++) {
prev_instruction_type = prev_il_instruction->candidate_datatypes[i];
@@ -1720,6 +1754,7 @@
* We do not need to generate an error message. This error will be caught somewhere else!
*/
if (NULL == prev_il_instruction) return NULL;
+ if (NULL == il_operand) return NULL;
for (unsigned int i = 0; i < prev_il_instruction->candidate_datatypes.size(); i++) {
if (get_datatype_info_c::is_ANY_BIT_compatible(prev_il_instruction->candidate_datatypes[i]))
add_datatype_to_candidate_list(symbol, prev_il_instruction->candidate_datatypes[i]);
@@ -1729,58 +1764,17 @@
}
-void *fill_candidate_datatypes_c::visit(S_operator_c *symbol) {
- /* TODO: what if this is a FB call ?? */
- symbol_c *prev_instruction_type, *operand_type;
-
- if (NULL == prev_il_instruction) return NULL;
- for (unsigned int i = 0; i < prev_il_instruction->candidate_datatypes.size(); i++) {
- for(unsigned int j = 0; j < il_operand->candidate_datatypes.size(); j++) {
- prev_instruction_type = prev_il_instruction->candidate_datatypes[i];
- operand_type = il_operand->candidate_datatypes[j];
- /* TODO: I believe the following is wrong! The data types of prev_instruction_type and operand_type DO NOT have to be equal.
- * the prev_instruction_type MUST be BOOL compatible.
- * I am not too sure about operand_type, does it have to be BOOL compatible, or can it be ANY_BIT compatible? Must check!
- */
- if (get_datatype_info_c::is_type_equal(prev_instruction_type,operand_type) && get_datatype_info_c::is_BOOL_compatible(operand_type))
- add_datatype_to_candidate_list(symbol, prev_instruction_type);
- }
- }
- if (debug) std::cout << "S [" << prev_il_instruction->candidate_datatypes.size() << "," << il_operand->candidate_datatypes.size() << "] ==> " << symbol->candidate_datatypes.size() << " result.\n";
- return NULL;
-}
-
-
-void *fill_candidate_datatypes_c::visit(R_operator_c *symbol) {
- /* TODO: what if this is a FB call ?? */
- symbol_c *prev_instruction_type, *operand_type;
-
- if (NULL == prev_il_instruction) return NULL;
- for (unsigned int i = 0; i < prev_il_instruction->candidate_datatypes.size(); i++) {
- for(unsigned int j = 0; j < il_operand->candidate_datatypes.size(); j++) {
- prev_instruction_type = prev_il_instruction->candidate_datatypes[i];
- operand_type = il_operand->candidate_datatypes[j];
- /* TODO: I believe the following is wrong! The data types of prev_instruction_type and operand_type DO NOT have to be equal.
- * the prev_instruction_type MUST be BOOL compatible.
- * I am not too sure about operand_type, does it have to be BOOL compatible, or can it be ANY_BIT compatible? Must check!
- */
- if (get_datatype_info_c::is_type_equal(prev_instruction_type,operand_type) && get_datatype_info_c::is_BOOL_compatible(operand_type))
- add_datatype_to_candidate_list(symbol, prev_instruction_type);
- }
- }
- if (debug) std::cout << "R [" << prev_il_instruction->candidate_datatypes.size() << "," << il_operand->candidate_datatypes.size() << "] ==> " << symbol->candidate_datatypes.size() << " result.\n";
- return NULL;
-}
-
-
-void *fill_candidate_datatypes_c::visit( S1_operator_c *symbol) {return handle_implicit_il_fb_call(symbol, "S1", symbol->called_fb_declaration);}
-void *fill_candidate_datatypes_c::visit( R1_operator_c *symbol) {return handle_implicit_il_fb_call(symbol, "R1", symbol->called_fb_declaration);}
+void *fill_candidate_datatypes_c::visit( S_operator_c *symbol) {return handle_S_and_R_operator (symbol, "S", symbol->called_fb_declaration);}
+void *fill_candidate_datatypes_c::visit( R_operator_c *symbol) {return handle_S_and_R_operator (symbol, "R", symbol->called_fb_declaration);}
+
+void *fill_candidate_datatypes_c::visit( S1_operator_c *symbol) {return handle_implicit_il_fb_call(symbol, "S1", symbol->called_fb_declaration);}
+void *fill_candidate_datatypes_c::visit( R1_operator_c *symbol) {return handle_implicit_il_fb_call(symbol, "R1", symbol->called_fb_declaration);}
void *fill_candidate_datatypes_c::visit( CLK_operator_c *symbol) {return handle_implicit_il_fb_call(symbol, "CLK", symbol->called_fb_declaration);}
-void *fill_candidate_datatypes_c::visit( CU_operator_c *symbol) {return handle_implicit_il_fb_call(symbol, "CU", symbol->called_fb_declaration);}
-void *fill_candidate_datatypes_c::visit( CD_operator_c *symbol) {return handle_implicit_il_fb_call(symbol, "CD", symbol->called_fb_declaration);}
-void *fill_candidate_datatypes_c::visit( PV_operator_c *symbol) {return handle_implicit_il_fb_call(symbol, "PV", symbol->called_fb_declaration);}
-void *fill_candidate_datatypes_c::visit( IN_operator_c *symbol) {return handle_implicit_il_fb_call(symbol, "IN", symbol->called_fb_declaration);}
-void *fill_candidate_datatypes_c::visit( PT_operator_c *symbol) {return handle_implicit_il_fb_call(symbol, "PT", symbol->called_fb_declaration);}
+void *fill_candidate_datatypes_c::visit( CU_operator_c *symbol) {return handle_implicit_il_fb_call(symbol, "CU", symbol->called_fb_declaration);}
+void *fill_candidate_datatypes_c::visit( CD_operator_c *symbol) {return handle_implicit_il_fb_call(symbol, "CD", symbol->called_fb_declaration);}
+void *fill_candidate_datatypes_c::visit( PV_operator_c *symbol) {return handle_implicit_il_fb_call(symbol, "PV", symbol->called_fb_declaration);}
+void *fill_candidate_datatypes_c::visit( IN_operator_c *symbol) {return handle_implicit_il_fb_call(symbol, "IN", symbol->called_fb_declaration);}
+void *fill_candidate_datatypes_c::visit( PT_operator_c *symbol) {return handle_implicit_il_fb_call(symbol, "PT", symbol->called_fb_declaration);}
void *fill_candidate_datatypes_c::visit( AND_operator_c *symbol) {return handle_binary_operator(widen_AND_table, symbol, prev_il_instruction, il_operand);}
void *fill_candidate_datatypes_c::visit( OR_operator_c *symbol) {return handle_binary_operator( widen_OR_table, symbol, prev_il_instruction, il_operand);}
@@ -1969,17 +1963,9 @@
/* B 3.2.2 Subprogram Control Statements */
/*****************************************/
void *fill_candidate_datatypes_c::visit(fb_invocation_c *symbol) {
- symbol_c *fb_type_id = search_varfb_instance_type->get_basetype_id(symbol->fb_name);
- /* Although a call to a non-declared FB is a semantic error, this is currently caught by stage 2! */
- if (NULL == fb_type_id) ERROR;
-
- function_block_declaration_c *fb_decl = function_block_type_symtable.find_value(fb_type_id);
- if (function_block_type_symtable.end_value() == fb_decl)
- /* The fb_name not the name of a FB instance. Most probably it is the name of a variable of some other type. */
- fb_decl = NULL;
-
- /* Although a call to a non-declared FB is a semantic error, this is currently caught by stage 2! */
- if (NULL == fb_decl) ERROR;
+ symbol_c *fb_decl = search_varfb_instance_type->get_basetype_decl(symbol->fb_name);
+ if (! get_datatype_info_c::is_function_block(fb_decl )) fb_decl = NULL;
+ if (NULL == fb_decl) ERROR; /* Although a call to a non-declared FB is a semantic error, this is currently caught by stage 2! */
if (symbol-> formal_param_list != NULL) symbol->formal_param_list->accept(*this);
if (symbol->nonformal_param_list != NULL) symbol->nonformal_param_list->accept(*this);
--- a/stage3/fill_candidate_datatypes.hh Tue Aug 20 11:11:09 2013 +0100
+++ b/stage3/fill_candidate_datatypes.hh Tue Aug 20 11:15:40 2013 +0100
@@ -89,7 +89,8 @@
bool match_nonformal_call(symbol_c *f_call, symbol_c *f_decl);
bool match_formal_call (symbol_c *f_call, symbol_c *f_decl, symbol_c **first_param_datatype = NULL);
void handle_function_call(symbol_c *fcall, generic_function_call_t fcall_data);
- void *handle_implicit_il_fb_call(symbol_c *il_instruction, const char *param_name, symbol_c *&called_fb_declaration);
+ void *handle_implicit_il_fb_call(symbol_c *il_instruction, const char *param_name, symbol_c *&called_fb_declaration);
+ void *handle_S_and_R_operator (symbol_c *symbol, const char *operator_str, symbol_c *&called_fb_declaration);
void *handle_equality_comparison(const struct widen_entry widen_table[], symbol_c *symbol, symbol_c *l_expr, symbol_c *r_expr);
void *handle_binary_expression (const struct widen_entry widen_table[], symbol_c *symbol, symbol_c *l_expr, symbol_c *r_expr);
void *handle_binary_operator (const struct widen_entry widen_table[], symbol_c *symbol, symbol_c *l_expr, symbol_c *r_expr);
--- a/stage3/narrow_candidate_datatypes.cc Tue Aug 20 11:11:09 2013 +0100
+++ b/stage3/narrow_candidate_datatypes.cc Tue Aug 20 11:15:40 2013 +0100
@@ -322,11 +322,9 @@
/* set the datatype of the il_operand, this is, the FB being called! */
if (NULL != il_operand) {
- /* only set it if it is in the candidate datatypes list! */
- set_datatype(called_fb_declaration, il_operand);
+ set_datatype(called_fb_declaration, il_operand); /* only set it if it is in the candidate datatypes list! */
il_operand->accept(*this);
}
- symbol_c *fb_decl = il_operand->datatype;
if (0 == fake_prev_il_instruction->prev_il_instruction.size()) {
/* This IL implicit FB call (e.g. CLK ton_var) is not preceded by another IL instruction
@@ -336,8 +334,10 @@
return NULL;
}
+ symbol_c *fb_decl = (NULL == il_operand)? NULL : il_operand->datatype;
+
if (NULL == fb_decl) {
- /* the il_operand is a not FB instance */
+ /* the il_operand is a not FB instance, or it simply does not even exist, */
/* so we simply pass on the required datatype to the prev_il_instructions */
/* The invalid FB invocation will be caught in the print_datatypes_error_c by analysing NULL value in il_operand->datatype! */
set_datatype_in_prev_il_instructions(il_instruction->datatype, fake_prev_il_instruction);
@@ -999,7 +999,7 @@
* | il_call_operator prev_declared_fb_name '(' il_operand_list ')'
* | il_call_operator prev_declared_fb_name '(' eol_list il_param_list ')'
*/
-/* 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 */
+/* NOTE: The parameter 'called_fb_declaration'is used to pass data between stage 3 and stage4 */
// SYM_REF4(il_fb_call_c, il_call_operator, fb_name, il_operand_list, il_param_list, symbol_c *called_fb_declaration)
void *narrow_candidate_datatypes_c::visit(il_fb_call_c *symbol) {
symbol_c *fb_decl = symbol->called_fb_declaration;
@@ -1093,7 +1093,9 @@
if (NULL != deprecated_operation)
*deprecated_operation = false;
- /* NOTE 1: the il_operand __may__ be pointing to a parenthesized list of IL instructions.
+ if (NULL == il_operand) return NULL; /* if no IL operand => error in the source code!! */
+
+ /* NOTE 1: the il_operand __may__ be pointing to a parenthesized list of IL instructions.
* e.g. LD 33
* AND ( 45
* OR 56
@@ -1136,9 +1138,8 @@
void *narrow_candidate_datatypes_c::handle_il_instruction(symbol_c *symbol) {
- if (NULL == symbol->datatype)
- /* next IL instructions were unable to determine the datatype this instruction should produce */
- return NULL;
+ if (NULL == symbol->datatype) return NULL; /* next IL instructions were unable to determine the datatype this instruction should produce */
+
/* NOTE 1: the il_operand __may__ be pointing to a parenthesized list of IL instructions.
* e.g. LD 33
* AND ( 45
@@ -1158,6 +1159,7 @@
set_datatype_in_prev_il_instructions(symbol->datatype, fake_prev_il_instruction);
/* set the datatype for the operand */
+ if (NULL == il_operand) return NULL; /* if no IL operand => error in the source code!! */
il_operand->datatype = symbol->datatype;
il_operand->accept(*this);
return NULL;
@@ -1167,10 +1169,10 @@
void *narrow_candidate_datatypes_c::visit(LD_operator_c *symbol) {
- if (NULL == symbol->datatype)
- /* next IL instructions were unable to determine the datatype this instruction should produce */
- return NULL;
+ if (NULL == symbol->datatype) return NULL; /* next IL instructions were unable to determine the datatype this instruction should produce */
+
/* set the datatype for the operand */
+ if (NULL == il_operand) return NULL; /* if no IL operand => error in the source code!! */
il_operand->datatype = symbol->datatype;
il_operand->accept(*this);
return NULL;
@@ -1178,10 +1180,10 @@
void *narrow_candidate_datatypes_c::visit(LDN_operator_c *symbol) {
- if (NULL == symbol->datatype)
- /* next IL instructions were unable to determine the datatype this instruction should produce */
- return NULL;
+ if (NULL == symbol->datatype) return NULL; /* next IL instructions were unable to determine the datatype this instruction should produce */
+
/* set the datatype for the operand */
+ if (NULL == il_operand) return NULL; /* if no IL operand => error in the source code!! */
il_operand->datatype = symbol->datatype;
il_operand->accept(*this);
return NULL;
@@ -1190,28 +1192,39 @@
void *narrow_candidate_datatypes_c::visit(ST_operator_c *symbol) {
if (symbol->candidate_datatypes.size() != 1)
return NULL;
+
symbol->datatype = symbol->candidate_datatypes[0];
- /* set the datatype for the operand */
- il_operand->datatype = symbol->datatype;
- il_operand->accept(*this);
/* set the desired datatype of the previous il instruction */
set_datatype_in_prev_il_instructions(symbol->datatype, fake_prev_il_instruction);
/* In the case of the ST operator, we must set the datatype of the il_instruction_c object that points to this ST_operator_c ourselves,
* since the following il_instruction_c objects have not done it, as is normal/standard for other instructions!
*/
current_il_instruction->datatype = symbol->datatype;
+
+ /* set the datatype for the operand */
+ if (NULL == il_operand) return NULL; /* if no IL operand => error in the source code!! */
+ il_operand->datatype = symbol->datatype;
+ il_operand->accept(*this);
+
return NULL;
}
void *narrow_candidate_datatypes_c::visit(STN_operator_c *symbol) {
if (symbol->candidate_datatypes.size() != 1)
return NULL;
+
symbol->datatype = symbol->candidate_datatypes[0];
+ /* set the desired datatype of the previous il instruction */
+ set_datatype_in_prev_il_instructions(symbol->datatype, fake_prev_il_instruction);
+ /* In the case of the ST operator, we must set the datatype of the il_instruction_c object that points to this ST_operator_c ourselves,
+ * since the following il_instruction_c objects have not done it, as is normal/standard for other instructions!
+ */
+ current_il_instruction->datatype = symbol->datatype;
+
/* set the datatype for the operand */
+ if (NULL == il_operand) return NULL; /* if no IL operand => error in the source code!! */
il_operand->datatype = symbol->datatype;
il_operand->accept(*this);
- /* set the desired datatype of the previous il instruction */
- set_datatype_in_prev_il_instructions(symbol->datatype, fake_prev_il_instruction);
return NULL;
}
@@ -1220,22 +1233,23 @@
* NOT [<il_operand>]
* However, it does not define the semantic of the NOT operation when the <il_operand> is specified.
* We therefore consider it an error if an il_operand is specified!
- */
- /* We do not change the data type, we simply invert the bits in bit types! */
+ * This error will be detected in print_datatypes_error_c!!
+ */
+ /* This operator does not change the data type, it simply inverts the bits in the ANT_BIT data types! */
/* So, we set the desired datatype of the previous il instruction */
set_datatype_in_prev_il_instructions(symbol->datatype, fake_prev_il_instruction);
return NULL;
}
void *narrow_candidate_datatypes_c::visit(S_operator_c *symbol) {
- /* TODO: what if this is a FB call? */
- return handle_il_instruction(symbol);
-}
+ if (NULL != symbol->called_fb_declaration) /* FB call semantics */ return narrow_implicit_il_fb_call(symbol, "S", symbol->called_fb_declaration);
+ else /* Reset semantics */ return handle_il_instruction(symbol);
+}
+
void *narrow_candidate_datatypes_c::visit(R_operator_c *symbol) {
- /* TODO: what if this is a FB call? */
- return handle_il_instruction(symbol);
-}
-
+ if (NULL != symbol->called_fb_declaration) /* FB call semantics */ return narrow_implicit_il_fb_call(symbol, "R", symbol->called_fb_declaration);
+ else /* Reset semantics */ return handle_il_instruction(symbol);
+}
void *narrow_candidate_datatypes_c::visit( S1_operator_c *symbol) {return narrow_implicit_il_fb_call(symbol, "S1", symbol->called_fb_declaration);}
void *narrow_candidate_datatypes_c::visit( R1_operator_c *symbol) {return narrow_implicit_il_fb_call(symbol, "R1", symbol->called_fb_declaration);}
--- a/stage3/print_datatypes_error.cc Tue Aug 20 11:11:09 2013 +0100
+++ b/stage3/print_datatypes_error.cc Tue Aug 20 11:15:40 2013 +0100
@@ -278,7 +278,7 @@
STAGE3_ERROR(0, il_operator, il_operator, "Missing operand for FB call operator '%s'.", param_name);
return NULL;
}
- il_operand->accept(*this);
+ // il_operand->accept(*this); // NOT required. The il_simple_operation_c already visits it!!
if (NULL == called_fb_declaration) {
STAGE3_ERROR(0, il_operator, il_operand, "Invalid FB call: operand is not a FB instance.");
@@ -760,10 +760,8 @@
void *print_datatypes_error_c::visit(il_simple_operation_c *symbol) {
il_operand = symbol->il_operand;
- if (NULL != symbol->il_operand) {
- symbol->il_operand->accept(*this);
- }
- /* recursive call to see whether data types are compatible */
+ if (NULL != il_operand) symbol->il_operand->accept(*this); /* recursive call to see whether data types are compatible */
+
symbol->il_simple_operator->accept(*this);
il_operand = NULL;
return NULL;
@@ -932,50 +930,22 @@
/* B 2.2 Operators */
/*******************/
void *print_datatypes_error_c::print_binary_operator_errors(const char *il_operator, symbol_c *symbol, bool deprecated_operation) {
- if ((symbol->candidate_datatypes.size() == 0) && (il_operand->candidate_datatypes.size() > 0)) {
- STAGE3_ERROR(0, symbol, symbol, "Data type mismatch for '%s' operator.", il_operator);
- } else if (NULL == symbol->datatype) {
- STAGE3_WARNING(symbol, symbol, "Result of '%s' operation is never used.", il_operator);
+ if (NULL == il_operand) {
+ STAGE3_ERROR(0, symbol, symbol, "Missing operand for %s operator.", il_operator); // message (a)
+ } else if ((symbol->candidate_datatypes.size() == 0) && (il_operand->candidate_datatypes.size() > 0)) {
+ STAGE3_ERROR(0, symbol, symbol, "Data type mismatch for '%s' operator.", il_operator); // message (b)
+ } else if (NULL == symbol->datatype) {
+ STAGE3_WARNING(symbol, symbol, "Result of '%s' operation is never used.", il_operator); // message (c)
} else if (deprecated_operation)
- STAGE3_WARNING(symbol, symbol, "Deprecated operation for '%s' operator.", il_operator);
- return NULL;
-}
-
-
-void *print_datatypes_error_c::visit(LD_operator_c *symbol) {
- return NULL;
-}
-
-void *print_datatypes_error_c::visit(LDN_operator_c *symbol) {
- if ((symbol->candidate_datatypes.size() == 0) &&
- (il_operand->candidate_datatypes.size() > 0))
- STAGE3_ERROR(0, symbol, symbol, "Data type mismatch for 'LDN' operator.");
- return NULL;
-}
-
-void *print_datatypes_error_c::visit(ST_operator_c *symbol) {
- /* MANU:
- * if prev_instruction is NULL we can print a message error or warning error like:
- * we can't use a ST like first instruction.
- * What do you think?
- */
- if ((symbol->candidate_datatypes.size() == 0) &&
- (il_operand->candidate_datatypes.size() > 0))
- STAGE3_ERROR(0, symbol, symbol, "Data type mismatch for 'ST' operator.");
- return NULL;
-}
-
-void *print_datatypes_error_c::visit(STN_operator_c *symbol) {
- /* MANU:
- * if prev_instruction is NULL we can print a message error or warning error like:
- * we can't use a ST like first instruction.
- * What do you think?
- */
- if ((symbol->candidate_datatypes.size() == 0) &&
- (il_operand->candidate_datatypes.size() > 0))
- STAGE3_ERROR(0, symbol, symbol, "Data type mismatch for 'STN' operator.");
- return NULL;
-}
+ STAGE3_WARNING(symbol, symbol, "Deprecated operation for '%s' operator.", il_operator); // message (d)
+ return NULL;
+}
+
+
+void *print_datatypes_error_c::visit( LD_operator_c *symbol) {return print_binary_operator_errors("LD" , symbol);} // I believe it will never emit messages (b) and (c)!!
+void *print_datatypes_error_c::visit( LDN_operator_c *symbol) {return print_binary_operator_errors("LDN" , symbol);} // I believe it will never emit message (c)
+void *print_datatypes_error_c::visit( ST_operator_c *symbol) {return print_binary_operator_errors("ST" , symbol);} // I believe it will never emit message (c)
+void *print_datatypes_error_c::visit( STN_operator_c *symbol) {return print_binary_operator_errors("STN" , symbol);} // I believe it will never emit message (c)
void *print_datatypes_error_c::visit(NOT_operator_c *symbol) {
/* NOTE: the standard allows syntax in which the NOT operator is followed by an optional <il_operand>
@@ -983,27 +953,21 @@
* However, it does not define the semantic of the NOT operation when the <il_operand> is specified.
* We therefore consider it an error if an il_operand is specified!
*/
- if (il_operand != NULL)
+ if (il_operand != NULL) {
STAGE3_ERROR(0, symbol, symbol, "'NOT' operator may not have an operand.");
- if (symbol->candidate_datatypes.size() == 0)
+ } else if (symbol->candidate_datatypes.size() == 0)
STAGE3_ERROR(0, symbol, symbol, "Data type mismatch for 'NOT' operator.");
return NULL;
}
void *print_datatypes_error_c::visit(S_operator_c *symbol) {
- /* TODO: what if this is a FB call ?? */
- if ((symbol->candidate_datatypes.size() == 0) &&
- (il_operand->candidate_datatypes.size() > 0))
- STAGE3_ERROR(0, symbol, symbol, "Data type mismatch for 'S' operator.");
- return NULL;
+ if (NULL != symbol->called_fb_declaration) /* FB call semantics */ return handle_implicit_il_fb_invocation("S", symbol, symbol->called_fb_declaration);
+ else /* Reset semantics */ return print_binary_operator_errors ("S", symbol);
}
void *print_datatypes_error_c::visit(R_operator_c *symbol) {
- /* TODO: what if this is a FB call ?? */
- if ((symbol->candidate_datatypes.size() == 0) &&
- (il_operand->candidate_datatypes.size() > 0))
- STAGE3_ERROR(0, symbol, symbol, "Data type mismatch for 'R' operator.");
- return NULL;
+ if (NULL != symbol->called_fb_declaration) /* FB call semantics */ return handle_implicit_il_fb_invocation("R", symbol, symbol->called_fb_declaration);
+ else /* Reset semantics */ return print_binary_operator_errors ("R", symbol);
}
void *print_datatypes_error_c::visit( S1_operator_c *symbol) {return handle_implicit_il_fb_invocation( "S1", symbol, symbol->called_fb_declaration);}
--- a/stage4/generate_c/generate_c_il.cc Tue Aug 20 11:11:09 2013 +0100
+++ b/stage4/generate_c/generate_c_il.cc Tue Aug 20 11:15:40 2013 +0100
@@ -1530,6 +1530,16 @@
void *visit(S_operator_c *symbol) {
+ /* This operator must implement one of two possible semantics:
+ * - FB call
+ * - Set all the bits of an ANY_BIT type variable to 1
+ */
+
+ /* Check whether we must implement the FB call semantics... */
+ if (NULL != symbol->called_fb_declaration)
+ return XXX_CAL_operator( "S", this->current_operand);
+
+ /* Implement the bit setting semantics... */
if (wanted_variablegeneration != expression_vg) {
s4o.print("LD");
return NULL;
@@ -1552,6 +1562,16 @@
void *visit(R_operator_c *symbol) {
+ /* This operator must implement one of two possible semantics:
+ * - FB call
+ * - Set all the bits of an ANY_BIT type variable to 0
+ */
+
+ /* Check whether we must implement the FB call semantics... */
+ if (NULL != symbol->called_fb_declaration)
+ return XXX_CAL_operator( "R", this->current_operand);
+
+ /* Implement the bit setting semantics... */
if (wanted_variablegeneration != expression_vg) {
s4o.print("LD");
return NULL;