[cfe-dev] clang rewriter

[Xiaohui Chen]

Citing from the link below:

" It is pretty much the same as editing the AST directly. You can do all the
source editing in memory in a single tool, *and* do the compile step on the
changed source from the same tool; no need to write anything to disk (in
fact, the rewriting tools all have the source in memory before they edit
the files on disk).
"

i think this is what i want. but i can not find any related APIs to do this job. Could any one point this out for me?


To present my question again:
i already have the AST for the following code:
{
 ....... // A
 ....... // B
}

For instance, i intend to insert Decl "int var"(say C) between A and B, i want to rebuild the AST, so 
i can get a new AST presenting the following code:

{
 ....... // A
 int var; // C
 ....... // B
}

i will do other transformation based on this new AST.

Sincerely
hui

On 12/22/14, mobi phil  <mobi at mobiphil.com> wrote:
> 
> > Hi,
> > thanks for your reply.
> > since the AST is immutable, what did you mean by saying "rebuild the AST with the rewritten code "?
> > 
> > do you mean i should save the modified code to a ".c" file and re-parse it again?
> > 
> > or there are some APIs i can use to insert a node into the AST without re-parse the file?
> > 
> > 
> > 
> 
> 
> did not try it myself but according to Manuel (link below), you do not need to save the file to disk, you can re-compile (thus re-build the AST) from the buffer where you applied the rewrites
> 
> 
> check this one http://lists.cs.uiuc.edu/pipermail/cfe-dev/2014-December/040616.html
> 
> 
> 
> 
> 
> 
> 
>  
> 
>  
> 
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