[Qt-creator] getting AST from a document

[Roberto Raggi]

Hi,

On Jan 7, 2009, at 8:56 AM, Marek Jasovsky wrote:

> Hi all, hi Roberto
>
> I have finally managed my plugin and mode work, but now I can not  
> get ast of current document.
>
> first version of code crashed when trying to convert ast to  
> TranslationUnitAST. then, I found out, that translationUnit for the  
> document had already been released.
>
> TranslationUnit *tu = doc->translationUnit();
>
>     if (tu)
>     {
>         AST* ast = tu->ast();
>         qDebug("before tu->control()");
>         DumpAST *dump = new DumpAST(tu->control());
>         qDebug("after tu->control()");
>         //ast->accept(dump);
>
>         if (ast->asTranslationUnit())
>             ast->asTranslationUnit()->accept(dump);
>     }
>
> unfortunately as seen below, I was neither able to parse the  
> document once more, as the code crashed in MemoryPool::allocate  
> which is inline function. (ptr pointed to 0x0010)

Look at src/plugins/cpptools/cppmodelmanager.cpp around line 410.

407      m_currentDoc->setSource(preprocessedCode);
408      m_currentDoc->parse();
409      m_currentDoc->check();
410      m_currentDoc->releaseTranslationUnit(); // release the AST  
and the token stream.

As you can see we dispose the AST as soon as we are done processing  
it. So just add your stuff before the call to releaseTranslationUnit().

ciao robe

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