[C++] Coding rule enforcement

Daniel Gutson daniel.gutson@tallertechnologies.com
Mon Sep 21 13:52:00 GMT 2015

On Tue, Sep 15, 2015 at 3:31 PM, Jason Merrill <jason@redhat.com> wrote:
> On 09/15/2015 01:20 PM, Manuel López-Ibáñez wrote:
>> On 15/09/15 15:26, Richard Biener wrote:
>>> On Tue, Sep 15, 2015 at 3:02 PM, Nathan Sidwell <nathan@acm.org> wrote:
>>>> Jason,
>>>> somme of our customers have 'interesting' C++ coding rules, they'd
>>>> like to
>>>> have the compiler enforced.  They want to disable:
>>>> 1) namespace definitions
>>>> 2) template declarations
>>>> 3) multiple inheritance
>>>> 4) virtual inheritance
>>>> But they want to use the STL.  This patch implements 4 new flags,
>>>> intended
>>>> to be use in the -fno-FOO form.  They're only active outside of system
>>>> header files.
>> If these are quite specific coding rules, wouldn't this be something
>> ideal for a plugin rather than implemented in the compiler proper?
>> One can implement warnings with plugins (in python if desired!)
>> http://gcc-python-plugin.readthedocs.org/en/latest/basics.html#generating-custom-errors-and-warnings
>> Compiler plugins that implement specific coding rules are quite common,
>> alas, using clang not GCC:
>> https://wiki.documentfoundation.org/Development/Clang_plugins
>> It would be more generally useful to extend GCC to fully support this
>> type of plugins.
> Good point.

FWIW, we could make this plugin in 2 weeks (w already have static
checkers as plugins for our customers). I understand Nathan that you
may have some deadlines, but if we could have the opportunity to
implement it, we could accomplish a clean isolation of a particular
business needs (despite I acknowledge that a warning about virtual
inheritance may be useful for a broader audience). OTOH, a plugin can
receive arguments, such as a configuration file which could point to
specific sources or hints about where to apply the warning, or a
suppression file, both things useful for large legacy code. IMVHO I
think this is a superior solution.
Please let me know if we could collaborate to get both a better gcc
and a better static checker.

> Jason


Daniel F. Gutson
Chief Engineering Officer, SPD

San Lorenzo 47, 3rd Floor, Office 5
Córdoba, Argentina

Phone:   +54 351 4217888 / +54 351 4218211
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