[cfe-dev] AST matcher "refersToType"

[Stephen Kelly via cfe-dev]

On 18/10/2019 20:56, Brian Schiller via cfe-dev wrote:
> I believe I've found a mistake in the documentation for the 
> `refersToType` AST matcher: 
> https://clang.llvm.org/docs/LibASTMatchersReference.html#refersToType0
> 
> The example code makes use of a matcher called `class`, but I am unable 
> to find such a matcher in the docs, and when I try to use it in 
> clang-query I get a "matcher not found" error.
> 
> I'd be happy to make a patch to the docs, but am actually having trouble 
> using the `refersToType` matcher at the moment. I'm trying to match 
> calls to `std::make_unique` specialized with a particular class. That 
> is, I want `std::make_unique<Demo::Widget>`, but not 
> `std::make_unique<Something::Else>`. I'd also be happy with a way to 
> filter for the correct matches in the MatchCallback.


You need `refersToType(asString("class Demo::Widget")))`.

Unfortunately this is not very discoverable. I showed some tooling to 
make this discoverable here: 
https://steveire.wordpress.com/2019/04/30/the-future-of-ast-matching-refactoring-tools-eurollvm-and-accu/ 
but it's not generally available yet.

Thanks,

Stephen.