[cfe-dev] libclang-based semantic-diff tool

[Manuel Klimek via cfe-dev]

Nope, feel free to write one :)

On Fri, May 20, 2016 at 11:08 AM Gonzalo BG via cfe-dev <
cfe-dev at lists.llvm.org> wrote:

> Does anybody know of a libclang-based semantic-diff tool or is working on
> one?
>
> Things I am looking for:
>
> - ability to ignore _all_ formatting while diff'ing files (e.g. be able to
> diff 2 files formatted with completely different styles and show only
> non-formatting related changes)
>
> - semantic diffs, e.g., if a class variable was renamed, instead of giving
> a diff on every usage of the variable, I would like to get only 1 diff:
> "this class variable was changed", used 10000 times, and then be able to
> see/merge/edit the diffs at a semantic level. The same for function names,
> class names, macros, namespaces...
>
> A problem introduced by clang format is that as bugs get fixed and new
> versions get released and as developers work with different versions of it
> formatting changes creep into source code repositories along real changes.
> Being able to filter out this noise would be very valuable.
>
> Right now the situation with clang-format is "don't ever think about
> source code formatting again, _until_ you need to commit", which is way
> better than what we had, but still not perfect. I don't want to ever think
> about formatting again, not even while diff'ing and/or committing.
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