Eclipse Community Forums: Java Development Tools (JDT)

Home » Language IDEs » Java Development Tools (JDT) » Incomplete code AST(Get the AST of an incomplete user statement)

Incomplete code AST [message #908194]

Tue, 04 September 2012 19:05

Eclipse User

Hi all,

My goal is to develop a plugin which will use the user code. I was doing some previous work with ASTParser and I would get the AST only if the code was fully compileable. However, it is possible that the user inputs some statement fraction. In that case, ASTParser will, as far as I know, return me an empty AST. Is it possible to circumvent or hack this and to get the AST?

Re: Incomplete code AST [message #908195 is a reply to message #908194]

Tue, 04 September 2012 19:09

Eclipse User

Have a look at org.eclipse.jdt.core.dom.ASTParser.setKind(int)

HTH,
Stephan

Re: Incomplete code AST [message #908212 is a reply to message #908195]

Tue, 04 September 2012 20:26

Eclipse User

Stephan Herrmann wrote on Tue, 04 September 2012 19:09

Have a look at org.eclipse.jdt.core.dom.ASTParser.setKind(int)

HTH,
Stephan

Maybe I got something wrong, but I think that can't provide me with an AST of the following piece of code:

...
String str = "I am some string";
int a = str.length +

Re: Incomplete code AST [message #909273 is a reply to message #908212]

Thu, 06 September 2012 17:14

Eclipse User

oh, I didn't know how incomplete your code is.
Have you tried ASTParser.setStatementsRecovery(true) ?
Of course there are limits what a parser can recognize if it's not legal code (and incomplete statements are by definition illegal ...).

Stephan

Re: Incomplete code AST [message #909396 is a reply to message #909273]

Fri, 07 September 2012 00:50

Eclipse User

Stephan Herrmann wrote on Thu, 06 September 2012 17:14

oh, I didn't know how incomplete your code is.
Have you tried ASTParser.setStatementsRecovery(true) ?
Of course there are limits what a parser can recognize if it's not legal code (and incomplete statements are by definition illegal ...).

Stephan

Thanks Stephan, that is quite helpful. I can see with ASTView that in this case it recovers in a way that it removes the "+" sign. I think this will be good enough only if I can somehow "apply" that tree to remove that "+". Basically, I would like to remove that part and then add some mine. How hard/easy is that?

Previous Topic:	Annotations parsing in Eclipse view plugin
Next Topic:	How to get the resources when the plugin install at eclipse??

Goto Forum:

-=] Back to Top [=-

Current Time: Tue Jul 22 18:47:58 EDT 2025

.:: Contact :: Home ::.

Breadcrumbs

Sign up to our Newsletter