[cfe-dev] Hacking advice

[Garrison Venn]

I believe HandleTopLevelDecl, although a little too low level works, since every thing is a Decl
(see http://clang.llvm.org/doxygen/classclang_1_1Decl.html), and from Decls one can get statements
and therefore expressions (see http://clang.llvm.org/doxygen/classclang_1_1FunctionDecl.html for example).
Having said this I believe utilization of a visitor is more practical, and therefore use of RecursiveASTVisitor
more viable.

Garrison

On Nov 6, 2010, at 9:06, Jeff Kunkel wrote:

> The overall goal would be 
> 1: parse the names, return types, and parameters of functions with a given context like a namespace, class, struct or global scope.
> 2: parse classes, structs, enums, etc for the name, internal objects, members, member methods, virtual overrides, inheritance, etc. 
> 3: The final output would be the boost::python C++ code wrapper with as descriptive an interface as the C++ class itself.
> 
> Thanks,
> Jeff Kunkel
> 
> On Sat, Nov 6, 2010 at 12:02 PM, Jeff Kunkel <jdkunk3 at gmail.com> wrote:
> I've been studying ASTConsumer and RecursiveASTVisitor.  The easiest way to find objects, structs, class, enums, etc is clearly "HandleTagDeclDefinition" from ASTConsumer (see the function documentation). However, I still need to be able to gather global functions or functions local to a namespace. 
> 
> I am looking at "HandleTopLevelDecl" within the ASTConsumer, but it seems to be geared for data declartion like "int x,y;". I am not 100 percent sure that it handles function definitions as well.
> 
> Second, ASTContext is a very general class, and it is a bear to parse through to find what I need. It seems that I could forgo the methods described above, and I could just use "HandleTranslationUnit" if I wanted to parse through the ASTContext. 
> 
> RecursiveASTVisitor looks geared for template declarations and instantiations. It does not seem viable for the common function definitions, and it seems inept to handle class, struct, etc instantiations. 
> 
> Any other advice or comments?
> 
> - Thanks
> - Jeff Kunkel
> 
> 
> On Sat, Nov 6, 2010 at 11:33 AM, David Chisnall <csdavec at swan.ac.uk> wrote:
> On 5 Nov 2010, at 21:16, Jeff Kunkel wrote:
> 
> > I need to gather or visit the classes, methods, and functions defined within a give clang compiler instance. Is there a simple interface to accomplish this?
> 
> This depends on what you wish to accomplish.  The simplest interface is via libclang, but it doesn't expose all of the details of the AST.  Alternatively, you can use the AST visitor or consumer interfaces.  The best approach depends on the level of detail that you need.
> 
> David
> 
> 
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