Re: [cdt-dev] adding a new language to the CDT

["Tom Ball" <tball@xxxxxxxxxx>]

I'm not a CDT expert, but what you describe seems like a backwards
approach:  JDT and CDT are purposely specific to their respective
languages, so new languages should have their own specific IDE support
rather than warp another language's.  There are several Eclipse
plug-in API packages to make this easier, such as LTK which provides
common refactoring support.  My suggestion is to write separate IDE
support for your language, but use CDT and JDT as best-of-class
example code.

Tom

On Tue, Oct 28, 2008 at 6:14 AM, Michael Rosenfelder
<MROSENFE@xxxxxxxxxx> wrote:
>
> Hi,
> I'm working on an Eclipse Plug-In to support a procedural programming
> language called PL8, a PL/I variant for systems programming. We have PL8 and
> C source files in one source tree (project). Our compiler builds all files
> to object files and then they are linked together to one binary. It is
> possible to call a C-function from a PL8-function and vice versa. So our
> idea was to use the CDT and treat the source tree as a C/C++ project. The
> C/C++ files will be handled by CDT and the PL8 files are handled by a PL8
> editor (Syntax highlighting, outline view). We also want to use the code
> navigation feature in the PL8 context. Therefore our idea was to add some
> informations like function definitions in the C-index. We created a Java
> class PL8Language implementing the ILanguage interface from the ILanguage
> Extension Point of the CDT. The parser of the PL8 should not create an own
> index, but should add the functions of PL8 language to the index, created by
> the CDT-Parser.
> If I click e.g. on a PL8-function in a C-file, the C-indexer searches for
> the function in the now combined index for the location of the function and
> jumps to it. If I click in a PL8-file, my own indexer searchs for the
> function in the combined index.
>
> I think the solution is to implement the getASTTranslationUnit and my own
> ModelBuilder.
> I tried to implement the getASTTranslationUnit in this way.
>
> public IASTTranslationUnit getASTTranslationUnit(CodeReader reader,
>                         IScannerInfo scanInfo, ICodeReaderFactory
> fileCreator,
>                         IIndex index, IParserLogService log) throws
> CoreException {
>                 System.out.println("PL8Language::getASTTranslationUnit");
>                 final ISourceCodeParser parser= new
> PL8SourceCodeParser(index);
>                 // Parse
>                 IASTTranslationUnit ast= parser.parse();
>                 return ast;
>
>         }
>
> The parse function of my SourceCodeParser looks like the following:
>
> public IASTTranslationUnit parse() {
>                 System.out.println("PL8SourceCodeParser::parse");
>                 IASTTranslationUnit result;
>                 //Create a new TranslationUnit
>                 translationUnit = new CASTTranslationUnit();
>                 translationUnit.setOffset(0);
>                 translationUnit.setIndex(index);
>
>                 //Name of the function
>                 char name_str[] = {'A', 'B'};
>                 CASTName declaratorName = new CASTName(name_str);
>
>                 //new SimpleDeclaration
>                 IASTSimpleDeclaration declaration = new
> CASTSimpleDeclaration();
>
>                 IASTStandardFunctionDeclarator declarator = new
> CASTFunctionDeclarator(declaratorName);
>                 declaration.addDeclarator(declarator);
>
>                 CASTSimpleDeclSpecifier declSpec = new
> CASTSimpleDeclSpecifier();
>                 declaration.setDeclSpecifier(declSpec);
>
>                 translationUnit.addDeclaration(declaration);
>
>                 result = translationUnit;
>                 translationUnit = null;
>
>                 return result;
>         }
>
> The goal is to add a function AB to the index. But the current situation is
> different. There is no function with the name AB in the index and at the
> moment I had no idea what the reason is. The return value of the parse
> function is the right one. The return value has the function included.
> At the moment I found no other way to write into the index, which is used
> for the source code navigation.
>
> I also searched for a solution in the CDT Wiki in the topic Design. It is
> clearly explained about the CDT works, but no explanation how I can
> implement my idea.
>
> So my question to you, where is my mistake or is it generally possible to
> implement my idea?
> Is there anything additional I have to do or can you point me to an example
> ?
>
> Thank you in advance!
>
> Kind regards
>
> Michael
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