[cfe-dev] RFC: Easier AST Matching by Default
Stephen Kelly via cfe-dev
cfe-dev at lists.llvm.org
Sun May 24 16:24:57 PDT 2020
On 20/12/2019 21:01, Stephen Kelly via cfe-dev wrote:
> (Apologies if you receive this twice. GMail classified the first one as
> Aaron Ballman and I met by chance in Belfast and we discussed a way
> forward towards making AST Matchers easier to use, particularly for C++
> developers who are not familiar with the details of the Clang AST.
> For those unaware, I expanded on this in the EuroLLVM conference this
> year, and then expanded on it at ACCU:
> One step in the process of getting there is changing the default
> behavior of AST Matchers to ignore invisible nodes while matching using
> the C++ API, and while matching and dumping AST nodes in clang-query.
> I think this is the most important change in the entire proposal as it
> sets out the intention of making the AST Matchers easier to use for C++
> developers who are not already familiar with Clang APIs.
> To that end, I've written an AST to motivate the change:
> We're looking for feedback before pressing forward with the change. I
> already have some patches written to port clang-tidy and unit tests to
> account for the change of default.
This change is now in master.
clang-query has also been updated to allow setting the traversal mode. eg:
set traversal AsIs
Since the original RFC I also added clang-query support to godbolt.org,
so you can experiment with it there instead of my personal instance of
If anyone watched my talk from EuroLLVM linked in my blog above, I am
interested in feedback to know which feature I presented there you would
most like to see upstreamed.
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