[cfe-dev] Modifying Structs

[Anil Altinay via cfe-dev]

Thank you Mats!

On Mon, Jan 16, 2017 at 2:05 AM, mats petersson <mats at planetcatfish.com>
wrote:

>
>
> On 16 January 2017 at 08:07, Anil Altinay <aaltinay at uci.edu> wrote:
>
>> 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.
>>
>
>
> Yes, that would certainly be one possible scenario.
>
> Obviously, assuming those are reasonably unique and can be used to
> identify structs of interest.
>
> --
> Mats
>
>>
>> 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
>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>
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