[cfe-dev] Modifying Structs

[Anil Altinay via cfe-dev]

So there is no way to look up typedef-name in HandleTagDeclDefinition. In
this case maybe I can use the the name and type of fields of structs to
identify the relevant structs but I am not sure about this.

On Sun, Jan 15, 2017 at 1:09 AM, mats petersson <mats at planetcatfish.com>
wrote:

>
>
> On 15 January 2017 at 01:49, Anil Altinay <aaltinay at uci.edu> wrote:
>
>> Hello Mats,
>>
>> I have a list of struct names and I need to change the order of fields of
>> these structs. I think I can only do this in HandleTagDeclDefinition
>> because once a struct definition is completed, it is called and the changes
>> I do here will be applied to rest of the codegen.
>>
>
> Those structs have no name. There is a typedef-name, but the struct has no
> name.
>
> Maybe the trick is to not use a list of struct names, but identify the
> relevant structures in some other way?
>
>>
>> I can access the name of the struct which is defined using typedef
>> keyword in HandleTranslationUnit (ASTContext &Ctx) but it is going to be
>> too late to make changes here. Please let me know if I think wrong.
>>
>
> It _may_ be too late. That depends on what you are actually trying to
> achieve and how. If you are re-ordering fields, then yes, it'll involve
> looking up all references to that field and changing it to the new index.
> Compilers do more difficult things throughout compilation.
>
>
>> Maybe there is a way to get the struct name in HandleTagDeclDefinition
>> even if it is defined with typedef but I couldn't find it.
>>
>
> There is obviously a typedef name in the compiler, but it's not part of
> the ASTConsumer interface to "give" that name (as far as I can see). I
> don't know the answer to how you solve this.
>
> --
> Mats
>
>>
>> thanks,
>> Anil
>>
>> On Sat, Jan 14, 2017 at 2:33 PM, mats petersson <mats at planetcatfish.com>
>> wrote:
>>
>>> Why do you need to know its name? If you edit the actual object, it
>>> should reflect everywhere it is referred to.
>>>
>>> --
>>> Mats
>>>
>>> On 13 January 2017 at 21:47, Anil Altinay via cfe-dev <
>>> cfe-dev at lists.llvm.org> wrote:
>>>
>>>> Actually, HandleTagDeclDefinition is called for Integer struct but I
>>>> couldn't get the name of the struct which is "Integer" from TagDecl. Is
>>>> there any way to do this in HandleTagDeclDefinition function.
>>>>
>>>> On Fri, Jan 13, 2017 at 12:22 AM, Anil Altinay <aaltinay at uci.edu>
>>>> wrote:
>>>>
>>>>> Hello,
>>>>>
>>>>> I am writing an AST consumer to modify fields of the structs in a C
>>>>> program and let clang to generate code accordingly. I was modifying
>>>>> structs in HandleTagDeclDefinition(TagDecl *D) but I realized that if
>>>>> a struct defined using typedef like below, HandleTagDeclDefinition is not
>>>>> called after it's definition is completed. Is there any way to solve this
>>>>> problem? Thank you.
>>>>>
>>>>> typedef struct
>>>>> {
>>>>>     int a;
>>>>> } Integer;
>>>>>
>>>>> best,
>>>>> Anil
>>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> cfe-dev mailing list
>>>> cfe-dev at lists.llvm.org
>>>> http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-dev
>>>>
>>>>
>>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/cfe-dev/attachments/20170116/4632264a/attachment.html>