[cfe-dev] How to get typedef name?

Miklos Vajna via cfe-dev cfe-dev at lists.llvm.org
Wed Nov 6 13:13:58 PST 2019

Hi Kenth,

On Tue, Nov 05, 2019 at 09:28:42AM +0000, Kenth Eriksson via cfe-dev <cfe-dev at lists.llvm.org> wrote:
> > Care to share a short, self-contained example?
> typedef int my_int_t;
> int my_func(my_int_t i);

And what code do you use to parse this?

> I would like to get the the typedef name for parameter 0 in the
> function decl. I don't want to desugar it, only get the typedef name.

That's what you get by default if you match for e.g. functionDecl() and
have a callback like this:

class Callback : public clang::ast_matchers::MatchFinder::MatchCallback
    Callback() {}

    run(const clang::ast_matchers::MatchFinder::MatchResult& result) override
        const auto decl = result.Nodes.getNodeAs<clang::FunctionDecl>("decl");
        if (!decl)

        std::cerr << decl->parameters()[0]->getType().getAsString() << std::endl;

This prints "my_int_t" for me with your above 2 liner input.


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