[cfe-dev] How to traverse all children FieldDecl from parent CXXRecordDecl

[Manasij Mukherjee]

Hi,
As a CXXRecordDecl is a DeclContext, you could simply use the iterators you
get by calling
decls_begin and decls_end.
For more sophisticated way, you could implement some visitor and
VisitDeclContext from there.

Manasij Mukherjee

On Fri, May 22, 2015 at 10:24 PM, Lu Niu <qqibrow at gmail.com> wrote:

> Hi,
>
> I am new to clang AST and try to parse a struct like below:
>
> struct Foo {
>     int a;
>     double b;
> };
>
>
> the ast-dump result is like:
>
> CXXRecordDecl 0x202c768 </home/lniu/ClangCheck/main.cpp:5:1, line:8:1>
> line:5:8 struct Foo definition
> |-CXXRecordDecl 0x202c880 <col:1, col:8> col:8 implicit struct Foo
> |-FieldDecl 0x202c920 <line:6:5, col:9> col:9 a 'int'
> `-FieldDecl 0x202c978 <line:7:5, col:12> col:12 b 'double'
>
> My question is How to traverse all children FieldDecl from parent
> CXXRecordDecl?
>
> I follow the tutorial here
> http://clang.llvm.org/docs/RAVFrontendAction.html
> <https://urldefense.proofpoint.com/v2/url?u=http-3A__clang.llvm.org_docs_RAVFrontendAction.html&d=AwMFaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=CnzuN65ENJ1H9py9XLiRvC_UQz6u3oG6GUNn7_wosSM&m=TqPuWCZLnY-IO9LafQXkcSpIk762vbbWxET56jjf77Q&s=9gYIUUh9eBetgoGJVhAy58A1YT1jXy3LmcfhmQEMiew&e=>
> and try to solve this inside bool VisitCXXRecordDecl(CXXRecordDecl
> *Declaration) from a RecursiveASTVisitor<FindNamedClassVisitor>. I am
> expecting pseudo code like below but couldn't find the api.
>
> bool VisitCXXRecordDecl(CXXRecordDecl *Declaration) {
>
> for(ChildrenDecl decl : Declaration.getChildren()) {
> // do sth here
> }
>
> }
>
> I don't know whether I am on the right path. Any idea is welcome. Thank
> you!
>
> Best,
> Lu
>
>
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>
>
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