Re: [cdt-dev] insert pragma into AST?

[Emanuel Graf <egraf@xxxxxx>]

Please open a bug report for this.

On Tuesday 29 July 2008, Jimmie Eriksson wrote:
> Did I find the error... in ASTModificationHelper.java?
> ...
> ...
> public <T extends IASTNode> T[] createModifiedChildArray(IASTNode parent,
> T[] unmodifiedChildren, Class<T> clazz){ ...
> ...
>             case INSERT_BEFORE:
>                 T insertedTNode = cast(parentModification.getNewNode(),
> clazz); // this line returns null.... ... .. even though the getNewNode()
> is the new literalnode I created... thats why I get a nullpointerexception
> ...
> ...
>     @SuppressWarnings("unchecked")
>     private <T> T cast(IASTNode node, Class<T> clazz) {
>         if (clazz.isInstance(node)){ // clazz(=IASTStatement) isNOTInstance
> (node(=IASTLiteralNode)) return (T) node;
>         }
>         return null; // this always return null on the IASTLiteralNode
>     }
>
> This code should be equal to what I use... the important part here is that
> the insertionPoint is of type CASTForStatement and the parent is of type
> CASTCompoundStatement try {
>             IASTTranslationUnit tu = insertionPoint.getTranslationUnit();
>             ASTRewrite aSTRewrite = ASTRewrite.create(tu);
>             IASTNode lit = aSTRewrite.createLiteralNode("Any text that I
> want... I will use it for a #pragma");
> aSTRewrite.insertBefore(insertionPoint.getParent(), insertionPoint, lit,
> null); Change change = aSTRewrite.rewriteAST();
>             change.perform(new NullProgressMonitor());
>         } catch (Exception e) {
>             e.printStackTrace();
>         }
>
> // the c program...
>
> int main() {  // CASTCompoundStatement
>     int i;
>     for(i = 0; i < 4; i ++) { // CASTForStatement
>         printf("hej");
>     }
>     return 0;
> }



-- 
Emanuel Graf   Dipl. Ing FH
Institut für Software - http://ifs.hsr.ch - +41 55 222 4622
HSR Hochschule für Technik Rapperswil
Oberseestr 10, Postfach 1475, CH-8640 Rapperswil