[cdt-dev] RE: Using CDT API to get C-AST

[rainman <anon83@xxxxxxxxx>]

Thank for the rapid response. The error i am facing from the second block of
code is below:

Exception in thread "main" java.lang.ExceptionInInitializerError  

     at Itest.main(Itest.java:25)  

Caused by: java.lang.IllegalStateException: Workspace is closed.  

     at
org.eclipse.core.resources.ResourcesPlugin.getWorkspace(ResourcesPlugin.java:329)  

     at org.eclipse.cdt.internal.core.model.CModel.<init>(CModel.java:34)  

     at org.eclipse.cdt.internal.core.model.CModelManager
.<init>(CModelManager.java:84)  

     at
org.eclipse.cdt.internal.core.model.CModelManager.getDefault(CModelManager.java:165)  

     at org.eclipse.cdt.core.model.CoreModel.<clinit>(CoreModel.java :60)  

     ... 1 more

Which is indicating the line: ITranslationUnit trUnit = (ITranslationUnit)
cFile;

can you please correct me if i am wrong?
after solving this problem i will get the IASTTranslationUnit by
ITranslationUnit.getAST ()
>From which i can get IASTDeclaration by
IASTTranslationUnit.getDeclarations();
i can get IName by IASTTranslationUnit.getDeclarations(Binding); (guessing i
somehow know the global variable binding)
or i can get global IScope by IASTTranslationUnit.getScope();

But which of this will help me to get the global variable declarations and
the statements which are using it?

Any Help on how can i edit those statement nodes and unparse/Pretty Print
them?

Thanks again.
Regards,
A.Rahman

Doug Schaefer-2 wrote:
> 
> The proper way to get an AST now (I think, I'm starting to lose track as
> I've been busy up in build/debug-land), is off the ITranslationUnit using
> getAST().
> 
> As for your exception, what was the exception? That's important
> information.
> Was it a ClassCastException? That would mean your IFile wasn't a
> ITranslationUnit. You should always check the types before doing a cast.
> 
> Doug Schaefer, QNX Software Systems
> Eclipse CDT Project Lead, http://cdtdoug.blogspot.com
> 
> 
>> -----Original Message-----
>> From: cdt-dev-bounces@xxxxxxxxxxx [mailto:cdt-dev-bounces@xxxxxxxxxxx] On
>> Behalf Of rainman
>> Sent: Thursday, May 31, 2007 1:58 PM
>> To: cdt-dev@xxxxxxxxxxx
>> Subject: [cdt-dev] Using CDT API to get C-AST
>> 
>> 
>> Hello All,
>>  I am new to CDT and trying to do something with cdt since last 1 month.
>> I
>> have searched many sites and mailed in cdt news portal as well. Please
>> help
>> me some one.
>> 
>> >From this list I found some thing like below but failed to get the
>> declaration of class to pass in IFile:
>>  IFile file = ...
>>  IASTTranslationUnit ast =
>>  CDOM.getInstance().getTranslationUnit(file);
>>  CPPNameCollector col = new CPPNameCollector();
>>  ast.accept(col);
>> 
>>  Iterator i = col.nameList.iterator();
>>  while (i.hasNext()) {
>>     IASTName n = (IASTName) i.next();
>>     IBinding binding = n.resolveBinding();
>> 
>>     if(binding instanceof CPPClassType) {
>>        // do something with the class
>>     }
>>  }
>> 
>> 
>> Also from another email I got something like below but when i pass
>> Path(file
>> location) it gives some exception with workspace and exits at first line
>> of
>> if block.
>> 
>> ICElement cFile = CoreModel.getDefault().create(IPath);
>> if(cFile != null)
>> {
>>     ITranslationUnit trUnit = (ITranslationUnit) cFile;
>>     ICElement[] elts = trUnit.getChildren();
>>     if(elts != null)
>>      {
>>          for(int i=0; i<elts.length; i++)
>>           {
>>                 System.out.println(elts[i].getElementName());
>>                  System.out.println(elts[i].getElementType());
>>            }
>>       }
>> }
>> 
>> Any simple idea or link indication will be appreciable. I've been trying
>> with the CDOM cause according to Doug Schaefer that is the starting point
>> for creating AST. I want to traverse the AST to get the idea which
>> statements using global variable. Change those statements and unparse to
>> get
>> the changed source.
>> For this i created and searched the cdt doc. I got the idea that i need
>> to
>> check:
>> 
>> IDeclaration.getElementType() == ICElement.C_VARIABLE
>> 
>> To get the global variable type. But couldn't the idea how to get the
>> IDeclaration from the IASTDeclaration (if i can successfully get ast that
>> is
>> :-).
>> 
>> Also i got some knowledge that in IDeclaration there is
>> ISourceManipulation
>> which might be in help for ast modification. But not sure about the AST
>> unparse or pretty printer help yet.
>> 
>> Thank you for your patience.
>> Hope to get some positive and fast response.
>> Regards.
>> A.Rahman
>> --
>> View this message in context: http://www.nabble.com/Using-CDT-API-to-get-
>> C-AST-tf3847998.html#a10898933
>> Sent from the Eclipse CDT - Development mailing list archive at
>> Nabble.com.
>> 
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