Sergey Organov <sorganov@gmail.com> writes:

>>> GNU Standard C++ Library v3 (documentation files) are likely to be
>>> installed on Linux hosts, I think.
>>
>> In Info format?  I could only find it in HTML format.
>
> You are right. Entirely unexpected from a GNU project.

The GNU standard C++ library, like many other C++ libraries, provide
in-header documentation with Doxygen.  It would likely be nice to parse
those in C and C++ mode both, as it's commonly used in both.

When you do file a request, maybe include that suggestion.
-- 
Arsen Arsenović