[cfe-dev] libTooling Questions : EndVisit like functionality

[Manuel Klimek via cfe-dev]

You can overwrite the Traverse* methods in RecursiveASTVisitor like the
ASTMatchFinder does.

On Thu, Dec 15, 2016 at 8:49 AM Hemant Bhagat via cfe-dev <
cfe-dev at lists.llvm.org> wrote:

> Hi,
>
>
>
> I have just started experimenting with clang AST and libTooling.
>
> My project requirement is to generate a json from an AST using libTooling.
>
> For that I need to track the end of every visit.
>
>
>
> For example.
>
>
>
> int main()
>
> {
>
>               Int x = 10;
>
>               return 0;
>
> }
>
>
>
> Corresponding json looks like (not the exact format)
>
> {
>
>               TranslationUnit
>
>               {
>
>                              Function <main>
>
>                             {
>
>                                            {
>
>                                                           Return Type <int>
>
>                                            }
>
>                                            {
>
>                                                           End Return Type
>
>                                            }
>
>                                            {
>
>                                                           Block Stmt "{"
>
>                                            }
>
>                                            {
>
>                                                           Variable
> Declaration x
>
>                                            }
>
>                                            {
>
>                                                           End Variable
> Declaration
>
>                                            }
>
>                                            {
>
>                                                           Return Stmt 0
>
>                                            }
>
>                                            {
>
>                                                           End Return Stmt
>
>                                            }
>
>                                            {
>
>                                                           * End Block
> Stmt*
>
>                                            }
>
>                              }
>
>                              {
>
>                                            *End Function*
>
>                              }
>
>    }
>
>    {
>
> *             End TranslationUnit*
>
>    }
>
> }
>
>
>
> In the above code, I will create a json node for every token visit
> recursively from AST. (see example json above)
>
> Question: How will I get the know that the function has reached the end
> while visiting nodes. (highlighted in bold red)
>
> OR is there any way to control the AST visitors as If we visit the
> children of function then all the children get visited twice.
>
>
>
> Any kind of help is really very appreciated as it is very important.
>
>
>
> Thanks,
>
> Hemant
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