[cfe-dev] Using clang-query on the whole project

[Sean Silva]

On Thu, Jun 11, 2015 at 2:39 AM, Manuel Klimek <klimek at google.com> wrote:

> On Thu, Jun 11, 2015 at 11:33 AM Kevin Funk <kfunk at kde.org> wrote:
>
>> Heya,
>>
>> I've found clang-query to be useful to query single files. Matching the
>> Clang
>> AST is easy enough and fast to learn. I don't see how to use clang-query
>> on a
>> whole project, though, which would be super useful.
>>
>> A simple example where it's effectively useless: Assume some header
>> "global.h"
>> containing "struct Global {};", every file in the project includes this
>> header.
>>
>> Now the idiomatic way to run clang-query over all the files in the
>> project:
>>   clang-query -p $BUILD $(find . -name "*.cpp")
>>
>> Let's try to find record decls named "Global":
>>   match recordDecl(hasName("Global"), isDefinition())
>>
>> => You get one match per file / translation unit. But in fact, this is not
>> really what you want. You want one match here.
>>
>> So of course this is difficult: clang-query is TU-centric, while for a
>> whole
>> project you'd "somehow" want a global view over the source code and not
>> have
>> duplicate results for a query like above.
>>
>> Questions:
>> - Is it possible to get clang-query to behave like that?
>>   - Any research/pointers in that regard?
>> - Is it possible to filter duplicates in the results without external
>> tools?
>>
>> Thanks a lot for a great tool so far!
>>
>
> Well, usually at that point you'll want to start writing a go/clangmr.
>

What is "go/clangmr"? Some sort of golang library? Can't seem to find a
reference other than http://research.google.com/pubs/pub41342.html but no
mention of "go".

-- Sean Silva


>
> It might also be cool to make clang-query work as clangmr; sounds like
> that would be a nice 20% project ;)
>
>
>> Greets
>>
>> --
>> Kevin Funk | kfunk at kde.org | http://kfunk.org
>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__kfunk.org&d=AwMFaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=CnzuN65ENJ1H9py9XLiRvC_UQz6u3oG6GUNn7_wosSM&m=0CyHQX4kFht-O-Dq4O9unNWXJr-EdeaxjoOo2AN8vhE&s=ujWrYOxcQV8goq5L7MFeVqPdHVHUoKvb_5p5Z8v8Oq0&e=>
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>
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