[cfe-dev] libTooling Questions : EndVisit like functionality

[Hemant Bhagat via cfe-dev]

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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