mirror of
https://github.com/google/googletest.git
synced 2024-12-30 21:23:01 +08:00
116 lines
4.1 KiB
Plaintext
116 lines
4.1 KiB
Plaintext
Goal:
|
|
-----
|
|
CppClean attempts to find problems in C++ source that slow development
|
|
in large code bases, for example various forms of unused code.
|
|
Unused code can be unused functions, methods, data members, types, etc
|
|
to unnecessary #include directives. Unnecessary #includes can cause
|
|
considerable extra compiles increasing the edit-compile-run cycle.
|
|
|
|
The project home page is: http://code.google.com/p/cppclean/
|
|
|
|
|
|
Features:
|
|
---------
|
|
* Find and print C++ language constructs: classes, methods, functions, etc.
|
|
* Find classes with virtual methods, no virtual destructor, and no bases
|
|
* Find global/static data that are potential problems when using threads
|
|
* Unnecessary forward class declarations
|
|
* Unnecessary function declarations
|
|
* Undeclared function definitions
|
|
* (planned) Find unnecessary header files #included
|
|
- No direct reference to anything in the header
|
|
- Header is unnecessary if classes were forward declared instead
|
|
* (planned) Source files that reference headers not directly #included,
|
|
ie, files that rely on a transitive #include from another header
|
|
* (planned) Unused members (private, protected, & public) methods and data
|
|
* (planned) Store AST in a SQL database so relationships can be queried
|
|
|
|
AST is Abstract Syntax Tree, a representation of parsed source code.
|
|
http://en.wikipedia.org/wiki/Abstract_syntax_tree
|
|
|
|
|
|
System Requirements:
|
|
--------------------
|
|
* Python 2.4 or later (2.3 probably works too)
|
|
* Works on Windows (untested), Mac OS X, and Unix
|
|
|
|
|
|
How to Run:
|
|
-----------
|
|
For all examples, it is assumed that cppclean resides in a directory called
|
|
/cppclean.
|
|
|
|
To print warnings for classes with virtual methods, no virtual destructor and
|
|
no base classes:
|
|
|
|
/cppclean/run.sh nonvirtual_dtors.py file1.h file2.h file3.cc ...
|
|
|
|
To print all the functions defined in header file(s):
|
|
|
|
/cppclean/run.sh functions.py file1.h file2.h ...
|
|
|
|
All the commands take multiple files on the command line. Other programs
|
|
include: find_warnings, headers, methods, and types. Some other programs
|
|
are available, but used primarily for debugging.
|
|
|
|
run.sh is a simple wrapper that sets PYTHONPATH to /cppclean and then
|
|
runs the program in /cppclean/cpp/PROGRAM.py. There is currently
|
|
no equivalent for Windows. Contributions for a run.bat file
|
|
would be greatly appreciated.
|
|
|
|
|
|
How to Configure:
|
|
-----------------
|
|
You can add a siteheaders.py file in /cppclean/cpp to configure where
|
|
to look for other headers (typically -I options passed to a compiler).
|
|
Currently two values are supported: _TRANSITIVE and GetIncludeDirs.
|
|
_TRANSITIVE should be set to a boolean value (True or False) indicating
|
|
whether to transitively process all header files. The default is False.
|
|
|
|
GetIncludeDirs is a function that takes a single argument and returns
|
|
a sequence of directories to include. This can be a generator or
|
|
return a static list.
|
|
|
|
def GetIncludeDirs(filename):
|
|
return ['/some/path/with/other/headers']
|
|
|
|
# Here is a more complicated example.
|
|
def GetIncludeDirs(filename):
|
|
yield '/path1'
|
|
yield os.path.join('/path2', os.path.dirname(filename))
|
|
yield '/path3'
|
|
|
|
|
|
How to Test:
|
|
------------
|
|
For all examples, it is assumed that cppclean resides in a directory called
|
|
/cppclean. The tests require
|
|
|
|
cd /cppclean
|
|
make test
|
|
# To generate expected results after a change:
|
|
make expected
|
|
|
|
|
|
Current Status:
|
|
---------------
|
|
The parser works pretty well for header files, parsing about 99% of Google's
|
|
header files. Anything which inspects structure of C++ source files should
|
|
work reasonably well. Function bodies are not transformed to an AST,
|
|
but left as tokens. Much work is still needed on finding unused header files
|
|
and storing an AST in a database.
|
|
|
|
|
|
Non-goals:
|
|
----------
|
|
* Parsing all valid C++ source
|
|
* Handling invalid C++ source gracefully
|
|
* Compiling to machine code (or anything beyond an AST)
|
|
|
|
|
|
Contact:
|
|
--------
|
|
If you used cppclean, I would love to hear about your experiences
|
|
cppclean@googlegroups.com. Even if you don't use cppclean, I'd like to
|
|
hear from you. :-) (You can contact me directly at: nnorwitz@gmail.com)
|