[cfe-dev] Clang libtoolig
ogzu rasa via cfe-dev
cfe-dev at lists.llvm.org
Fri Jul 21 02:29:45 PDT 2017
I'm novice with libtooling, I try to learn with easy c++ code. I try to
parse/print typedef expression like below lines:
namespace DEBUG {
typedef void(*function_pointer_t)(int&);
typedef int myInt;}
clang++ -Xclang -ast-dump -fsyntax-only output:
`-NamespaceDecl 0x3e4fe331a8 <test.h:3:1, line:7:1> line:3:11 TESTS
|-TypedefDecl 0x3e4fe333b8 <line:4:2, col:42> col:18
function_pointer_t 'double (*)(int &)'
| `-PointerType 0x3e4fe33350 'double (*)(int &)'
| `-ParenType 0x3e4fe332f0 'double (int &)' sugar
| `-FunctionProtoType 0x3e4fe332b0 'double (int &)' cdecl
| |-BuiltinType 0x3e4fe32b60 'double'
| `-LValueReferenceType 0x3e4fe33210 'int &'
| `-BuiltinType 0x3e4fe32a40 'int'
`-TypedefDecl 0x3e4fe33420 <line:5:2, col:14> col:14 myInt 'int'
`-BuiltinType 0x3e4fe32a40 'int'
For parse it I create a class that inherite from MatchFinder::MatchCallback and
overload MatchFinder::MatchCallback::run:
class TypdefDeclFinder : public MatchFinder::MatchCallback {public:
virtual void run(const MatchFinder::MatchResult& result)
{
auto Item =
result.Nodes.getNodeAs<clang::TypedefDecl>("typedefDeclMatch");
if (!Item) return;
if (!IsDeclFromInputFiles(Item, result.SourceManager)) return;
if (!Item->getIdentifier()) return;
if (IsInsideTemplateContext(Item)) return;
print(Item);
}};
But the Item pointer is equal to null. I can parse/print function,
variable, class, struct template, method templates, enum ... with
MacthFinder::MatchCallback, but this way doesn't run on typedef. What's
wrong with this code?
Thanks in advance for helps.
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