Add clarifying comment.

Remove access to NULL pointer.

Make temporary fix to is_complex() method.

Fix comment. (thanks go to Manuele for pointing it put).

Stop lvalue checks after finding an error in the expression.

Remove erroneous check for S1 and R1, and add missing declrataion.

Start implement lvalue check in IL instruction.

Add lvalue check on fb invocation.

Literals are also part of expressions!

Implement check_assignment_to_expression in lvalue_check_c class.

Remove potential access to NULL pointer.

Start having nicer stage 4 error messages.

Improve usability command line under windows.

Ignore trailing EOLs when determining symbol location.
(Makes for niver error messages)

Add comment.

Fix Segmentation fault in check_assignment_to_output lvalue method.

Remove deprecated status for ANYTIME operations.

Produce similar error messages in stage2 and stage3.

Fix bug when handling code with data type errors.

Fix printing of data type errors in while and repeat statements.

Add lvalue check for non formal function invocations.

Fixing check for assingment to FOR control variables.

Moving get_var_name_c into its own file.

Fixing check for assignment to output variables.

Fixing some bugs in lvalue checking (other bugs remain - to be fixed later)

Add lvalue check class.

Determine the modifiers (CONST, REATAIN) used when declaring a variable.

Fix typo in comparison expression.

Removing code from search_varfb_instance_type_c (use search_var_instance_decl_c instead).
(Preparing to delete search_varfb_instance_type_c in the future!)

Fix bug by expanding permissible data input of search_var_instance_decl_c
(this will also prepare us for removing search_varfb_instance_type_c in the future)

Edit formating and delete unused code.

Start data type checking of var declarations (including direct variables!)

Delete incorrect comments I had inserted previously (confusing EQ and NE functions)

merging with Lauren't changeset.

merge with Laurent's changeset (essentially ignore all changes).

merge with Laurent's changeset (essentially, ignore all changes).

merging with Laurent's changes.

merging with Laurent's change.

merging with Laurent's revision 55b074ea7255 (essentially ignoring all changes)

Add coment warning about incorrect implementation of the NE standard function.

merging with Laurent's patch.

Print correct error message when handling IL function calls.

Edit error message.

Add EXPT widen table.

Some stupid code cleanups.

Some code cleanups.

Clean up the code.

Fix error messages of il function calls - it now prints out location info of first parameter.

Clean code for printing errors in expressions.

Clean code for comparison operations & operators.

Cleaning up XORN, ANDN, and ORN operator code.

Cleaning up some code.

Add 'widen' tables for AND, OR and XOR operations.

Add MOD widening table, and some code clean-ups.

Re-organizing the code.

Change setting of deprecated_operation from fill to narrow_candidate_datatypes_c.
Expand widening tables for ADD, SUB, MUL and DIV.

Clarify some details in the comments.

Add check widening status for IL operator.
Fix check widening status for ST expression.

Fix remaining 'widen' tables.

Fix some 'widen' table entries.

Add a TODO comment.

Clean up code, and add support for 'safe' version of literals.

Bringing comment up to date.

Semantic verification of NOT operator.

Fix bug in building structured variables.

Delete unecessary copy_candidate_datatype_list() function.

Delete no longer needed copy_candidate_datatype_list() function.

Narrow IL lists twice, in order to handle JMP to labels before the JMP itself.

Do not allow duplicate values in candidate datatype list.

Handle JMP to labels preceding the JMP instruction itself.

Correctly handle JMP and RET IL operators in flow control analysis.

Fix filling candidate datatypes of JMP operations

Remove spurious printf()s, used during debugging session.

Add missing files.

Continue adding support for semantic verification of JMP and RET.

iAdd warning for deprecated operations.

Change prev_il_instruction to a vector<>

Some small cleanups.

Add support for semantic verification of CALC, CALCN, etc..

Finish support for semantic verification of IL paranthesised expressions.

More changes for support of semantic verification of il_expressions

Start of support for IL expressions (parenthesis).

Cleaning up the code.

Fix a few more bugs related to FB/function calls in IL.

Semantic verification: Add compatibility check for parameter direction in function invocation.

Add support for semantic verification for implict FB calls in IL (e.g. PV ton_var)

Start of support for semantic verification of FB calls in IL using special IL instructions.

Delete some comments.

Change name help function.

Update comments on general architecture.

Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.

Code cleanup.

Add printing of semantic errors when calling FB from IL.

Fix typo error in some il visit in fill_candidate_datatypes_c class.

Add semantic verification of FB calls in IL (not yet complete - missing printing of errors!)

Add support for semantic verification of function calls in IL.

Add TODO comment, and delete unused debugging code.

Delete un-used code.

Change negation expression (neg_expression_c) to only allow signed data types.

Move elementary_c::to_string() to datatype_functions.cc/hh

Add, to types symbol table, string datatypes with limited length (my_string_type: STRING[33]) (Thanks Andreas!)

Correctly return the initial value of a string datatype, with limited length (STRING[33] := 'hello')

More detailed error messages for FB invocations in ST.

More detailed error messages in function invocations in ST.

Fix bug in analysing real literals (thanks Andreas!)

Remove debugging messages, and code cleanup.

Better error reporting in function invocations, and in invalid literal values.

Better identification of erros in function/FB invocations.

Print error messages when datatype erros found in ST function/FB calls.

Continue checking data type compatibility inside expressions used to pass paramters to invalid function/FB calls

Adding support for semantic verification of FB calls in ST.

Delete wrong comment.

Add support in stage 3 for checking function invocations in ST.

Fix search_varfb_instance_decl to be able to find variables and FB when only given an identifier.
Fix handling of FB calls in stage3.
Start handling of function invocations in stage3.

Changing code indenting.

Add fill candidate method for fb_invocation_c symbol.

Re-write of stage3 code (done by Manuele and I), re-write of search_varfb_instance_type_c (done by myself), and several other bug fixes.

Merging with Laurent's repository.

Fix YYLTYPE declaration.

Merging with Laurent's repository.