AST references

Clang Frontend
#1

I have the following file:

@protocol MyProtocol

  • (void)someProtocolMethod;
    @end

@interface MyBaseClass {
id myIvar;
}
@end

When printing out the AST node for the @protocol declaration, I get:

$4 = {
DeclKind = clang::Decl::ObjCProtocol,
ExternalLexicalStorage = false,
ExternalVisibleStorage = false,
LookupPtr = 0x0,
FirstDecl = 0x1033160c0,
LastDecl = 0x1033160c0
}

However, when I print out the AST node for , I get a different value:

$5 = {
clang::Decl = {
_vptr$Decl = 0x1016f80d0,
NextDeclInContext = 0x103316150,
DeclCtx = {
Val = {
Value = 4348516192
}
},
Loc = {
ID = 2
},
DeclKind = clang::Decl::ObjCProtocol,
InvalidDecl = 0,
HasAttrs = 0,
Implicit = false,
Used = false,
IdentifierNamespace = 16,
Access = 0
},
members of clang::NamedDecl:
Name = {
Ptr = 4353910984
}
}

I was under the impression that clang would resolve references. So MyProtocol would be the same in both places. If not, how do I resolve these references?

Thanks.

Kevin

#2

Hi Kevin,

In the example below, Protocol references are resolved by the ObjCInterfaceDecl API (e.g. the iterator on ObjCInterfaceDecl should return the ObjCProtocolDecl for ‘MyProtocol’).

In the debug output below, $4 looks like a ‘DeclContext’ (which ObjCProtocolDecl inherits from indirectly).

Let me know if you need further assistance,

snaroff