[cfe-dev] Type Information for C++ classes

[Manuel Klimek]

Is this what you're looking for?
http://llvm.org/viewvc/llvm-project/clang-tools-extra/trunk/tool-template/ToolTemplate.cpp?revision=162624&view=markup

Cheers,
/Manuel

On Fri, Oct 12, 2012 at 10:50 AM, Mohammad Adil <madil90 at gmail.com> wrote:

> I am comfortable with clang's internal API at the time, although the
> abstraction provided in libclang seems much easier to work with. The
> clang's internal API is much more self-explanatory than libclang. Can you
> please give me some hints as for how to find the members and methods of a
> class. I can visit all classes using VisitCXXRecordDecl but there doesn't
> seem to be any way to find it's members. Is there a way to recursively walk
> all the children this CXXRecordDecl and figure out which ones are methods
> and members? Also, I am struggling on how to use the ASTMatcher you
> mentioned earlier. I have a returnstmt using the VisitStmt method of my
> visitor. This will give me a return statement. How do I find which function
> it belongs to? Can you give a small example of how to do it? I am very
> grateful for your help.
>
>
> On Fri, Oct 12, 2012 at 1:13 PM, Manuel Klimek <klimek at google.com> wrote:
>
>> On Fri, Oct 12, 2012 at 7:38 AM, Mohammad Adil <madil90 at gmail.com> wrote:
>>
>>> Also, Is it better to use libclang for doing this. My complete purpose
>>> is to refactor source code to find all functions, their arguments, return
>>> statements, all class members and methods. Can I find all this using
>>> libclang? I've heard that clang is unstable while libclang is stable. Which
>>> one should I use? I am currently using clang's internal API.
>>
>>
>>  http://clang.llvm.org/docs/Tooling.html
>>
>> I don't have too much experience with using libclang for something like
>> this; what you want to do is definitely possible with LibTooling. And while
>> the internal clang AST interface is going to change more often than
>> libclang, in practice it is stable enough that you usually don't care
>> unless you want to ship a product (like an IDE) to end users. I'd try to
>> decide more on how much power you need, or what language you'd like to
>> write your integration in.
>>
>> One good way is to try to start with libclang, and if you see that you're
>> hitting a missing feature, switch to using libtooling.
>>
>> Cheers,
>> /Manuel
>>
>>
>>> On Fri, Oct 12, 2012 at 10:16 AM, Mohammad Adil <madil90 at gmail.com>wrote:
>>>
>>>> My purpose is to overload the << operator for all classes if they don't
>>>> already have one. The basic goal is to make all classes serializable over
>>>> some stream (ideally a network stream). Is that possible with clang? If
>>>> yes, How do I find all the member variables and functions of a class or
>>>> struct?
>>>>
>>>> On Thu, Oct 11, 2012 at 5:13 PM, Manuel Klimek <klimek at google.com>wrote:
>>>>
>>>>> +cfe-dev
>>>>>
>>>>> On Thu, Oct 11, 2012 at 12:13 PM, Mohammad Adil <madil90 at gmail.com>wrote:
>>>>>
>>>>>> Sorry about that. I wasn't correctly changing my language from C to
>>>>>> C++. I figured that out. It's working now. I wanted to ask you one more
>>>>>> thing. I am trying to find all the return statements in the file. I can do
>>>>>> that easily but I know want to find out which function does this return
>>>>>> statement belong to? Since funcdecl and return statements are de-coupled, I
>>>>>> can't find a way to do so. Is there an easy way to do it?
>>>>>
>>>>>
>>>>> If you're using RecursiveASTVisitor, you can intercept the Traverse*
>>>>> calls to figure out AST child relations. Or you can use the AST matchers
>>>>> (functionDecl(hasDescendant(returnStmt()))).
>>>>>
>>>>> Cheers,
>>>>> /Manuel
>>>>>
>>>>>
>>>>>>  On Wed, Oct 10, 2012 at 8:29 PM, Manuel Klimek <klimek at google.com>wrote:
>>>>>>
>>>>>>> On Wed, Oct 10, 2012 at 2:05 AM, madil90 <madil90 at gmail.com> wrote:
>>>>>>> > Hi,
>>>>>>> >    I am trying to find the type of a VarDecl. I am currently using
>>>>>>> the
>>>>>>> > VarDecl->getOriginalType(). This function does not work for C++
>>>>>>> classes.
>>>>>>> > Consider the code below:
>>>>>>>
>>>>>>> Does getType() not work for you for some reason?
>>>>>>>
>>>>>>> Cheers,
>>>>>>> /Manuel
>>>>>>>
>>>>>>> >
>>>>>>> > class Foo
>>>>>>> > {
>>>>>>> >     int a;
>>>>>>> > };
>>>>>>> >
>>>>>>> > int f( Foo foo);
>>>>>>> >
>>>>>>> > When I try to find the type for "foo" in the function decleration,
>>>>>>> it
>>>>>>> > returns "int", while the actual type is Foo. If Foo is a
>>>>>>> structure, this
>>>>>>> > works perfectly fine but not for C++ classes. Can some one please
>>>>>>> explain
>>>>>>> > where the type information for C++ classes is stored?
>>>>>>> >
>>>>>>> >
>>>>>>> >
>>>>>>> > --
>>>>>>> > View this message in context:
>>>>>>> http://clang-developers.42468.n3.nabble.com/Type-Information-for-C-classes-tp4027266.html
>>>>>>> > Sent from the Clang Developers mailing list archive at Nabble.com.
>>>>>>> > _______________________________________________
>>>>>>> > cfe-dev mailing list
>>>>>>> > cfe-dev at cs.uiuc.edu
>>>>>>> > http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev
>>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Mohammad Adil
>>>>>> LUMS SSE
>>>>>>
>>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> Mohammad Adil
>>>> LUMS SSE
>>>>
>>>>
>>>
>>>
>>> --
>>> Mohammad Adil
>>> LUMS SSE
>>>
>>>
>>
>
>
> --
> Mohammad Adil
> LUMS SSE
>
>
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