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Dear AspectC++ users!
<p> The new release, AspectC++ 2.5, is now available for download at
<a class="moz-txt-link-abbreviated" href="http://www.aspectc.org"
moz-do-not-send="true">www.aspectc.org</a>. It is based on the
latest Clang version 21.1.6. Besides this, we have fixed many
problems and revived the MacOS ports. An important new feature is
the ability to control the generation of dependency files, which
can speed up incremental builds dramatically. Furthermore, a
pragma has been introduced that allows for filtering join points
based on filenames. This is very handy for C-style modularized
code.</p>
<p>Here is the detailed ChangeLog:</p>
<pre>Version 2.5 (2025-12-22)
### Added
- The weaving plan can now be checked for violations against #pragma acxx affect rules. A test program has been added. More code cleanup needed.
- Implemented #pragma acxx filter, which affects matching of joinpoints in the next advice that follows in the source code: Only joinpoints with shadows that are located in the matched file names are woven
- Added --gen_deps option to create an aspect dependency from '#pragma acxx affect <pattern>' directives in aspect headers; Updated the compiler manual on the --gen_deps option and the new pragmas "affect" and "filter"
- Error message are now being printed with Clang's DiagnosticEngine class. Therefore, the messages contain more information.
- Improved layout of manuals in PDF and HTML variants including syntax hightlighting for AspectC++ code in HTML
- Integrated fix for tricore target: all sizes and alignments of built-in datatypes should now be consistent with the back-end compiler; asm(...) is being skipped as clang doesn't know the correct register names; Added section on tricore compiler support in the compiler manual
- Better handling of paths with whitespace in the example makefile
- Ported to Clang 20.1.2 and 21.1.6
- Add documentation of ac++ code transformation patterns in the compile manual
- Added relation 'refs' to ACM_Pointcut in the project model; it refers to the elements returned by name lookup while parsing the pointcut expression; thereby the expression tree can be reconstructed easily after loading the model
- Added experimental feature: for get/set joinpoints the joinpoint-API now contains a static constexpr member function named 'variable()' if the backend compiler supports C++17. For get/set on global variables it returns a pointer to this variable as a compile-time constant that can be used as a template parameter, which has various
useful applications. For member variables the function returns 'nullptr'.
- Improved weaving pattern for mixed C/C++ projects: (1) Friend declarations are only inserted into classes that are not C-like; they don't need it, because nothing is private; (2) Inserted forward declarations are encapsulated in #ifdef __cplusplus and extern "C++".
- Added phase 1 support for C++ 11 inline namespaces
- Extended phase 1 parser to support namespace aliases and named pointcuts in unnamed namespace, thereby also fixing bug 796
- Created new test program that uses advice for builtin operator / to detect and handle division by zero errors
- Added support for C++17 annotations that are start with 'using <namespace>:' and extended the reference manual accordingly
### Changed
- Changed two tests so that results with clang++ and g++ as back-end compilers are identical
- Project model changes: now contains project paths with ids; filenames in the project tree are relative to a project path; the 'filename' utility function can now return the canonical path; source locations have been improved by omitting registration in the introducer
- ACProject now determines the support backend C++ standards and provides a function for checking it
### Fixed
- Made ac++ ignore 'preferred names' of standard library templates such as <a class="moz-txt-link-freetext" href="std::string">std::string</a>
- Fixed/simplified handling of statement attributes in clang 20 and above
- Various fixes needed for MacOS version: (1) Fixed internal lexing function in ClangIntroducer, becaused the old implementation segfaulted on MacOS; There must have been changes in Clang's preprocessor interface; (2) Now we handle attributes in namespace '_Clang' correctly; (3) Relaxed diagnostic of attributed parameter of built-in attributes as they can be arbitrary identifiers; (4) Fixed definition of built-in macros in ACProject class; (5) Class for sorting aspects no longer inherits from binary_function; (6) Makefile and manual improvements
- Fixed filename delimiter handling on Windows, which caused tests to fail
- Fixed race condition when creating a repository file: Two processes might have found simultaneously that no model file exists and then create one. In this situation information might be overwritten by the second process. We now use a separate lock file for the repository to avoid problems with the latest libxml2 versions that release the lock during normal operations
- Improved ResultBuffer implementation to fix bug 801
- Fixed bug #800 and thereby test 'STLString': reverted changes of revision 1650 and added a new fix for the problem that caused the implementation of revision 1650.
- Fixed bug #777 (problems with rvalue references in argument lists) and bug #799 (handling of advice for out of line functions in anonymous namespaces)
- Fixed bug #798: attributes can now be attached to aspects -- not only to classes
- Fixed handling of possible types in semantic analysis of pointcut expressions; this fixes the bug 'derived' could not match aspects.
- Fixed wrong handling of anonymous structs that are preceeded by 'static'; Improved handling of command line options
- Fixed problem with g++ 12.x and older as back-end compiler; <a class="moz-txt-link-freetext" href="AC::_FloatN">AC::_FloatN</a> was not defined in this case, which cause the definition of __float80 on x86 to be invalid
- Workaround to support gcc's datatype __float80 on x86
- Fixed ACModel CFLAGS; debugging did not work as expected
- Fixed insertion position for includes that are needed in case of introductions; if the outmost class definition is embedded in a typedef, the insertion position must be the start position of the typedef and *not* the class keyword
- Fixed signature generation for template argument packs in template argument lists</pre>
<br>
I hope you enjoy the new features. For bug reports, please use <a
class="moz-txt-link-freetext"
href="http://www.aspectc.org/bugzilla/" moz-do-not-send="true">http://www.aspectc.org/bugzilla/</a>.
If you don't have an account, yet, and want to report a bug, please
contact me.<br>
<br>
Best regards,<br>
<p>Olaf Spinczyk</p>
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