[cfe-dev] [RFC] Easier source-to-source transformations with clang tooling

Manuel Klimek via cfe-dev cfe-dev at lists.llvm.org
Mon Jan 21 01:16:57 PST 2019

Hi Yitzhak,

I'm still not seeing (and I'm not saying it's not there, just that I'm not
seeing it :) where this is significantly simpler to use than string
concatenation. Is there an example in the tests that you'd say exemplifies

On Fri, Jan 18, 2019 at 7:29 PM Yitzhak Mandelbaum <yitzhakm at google.com>

> After some delay, I've created a diff to accompany the doc.  In
> particular, here's the Stencil library, which provides for generating code
> in a format-string style:
> https://reviews.llvm.org/differential/diff/182553/
> Please see the tests for various examples and the doc for more explanation.
> On Fri, Nov 16, 2018 at 10:22 AM Yitzhak Mandelbaum <yitzhakm at google.com>
> wrote:
>> Hi all,
>> I have a proposal for a framework that makes it easier to write source to
>> source transformations with the clang::Tooling libraries, including
>> clang-tidy checks.
>> The full proposal is in this doc:
>> https://docs.google.com/document/d/1ppw0RhjwsrbBcHYhI85pe6ISDbA6r5d00ot3N8cQWeQ/edit?usp=sharing
>> From the doc:
>> Transformer is a framework that aims to simplify development of
>> clang-based source-to-source transformations.  It focuses on the particular
>> class of transformations that act only locally — that is, use local
>> information about the code and make local changes  (like a syntax-aware
>> “find-and-replace”); and at scale — that is, will be carried out on many
>> source files.  The target audience is users that are comfortable with, or
>> willing to become comfortable with, the clang AST matchers library.
>> I have a working prototype of this library which I've used on small
>> examples inside Google.  I plan to put together a patch for reference
>> next week, although the doc should stand on its own.
>> Thanks!
>> Yitzhak Mandelbaum
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