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Subject: Re: [boost] [algorithm] aesthetic question about cxx11
From: Marshall Clow (mclow.lists_at_[hidden])
Date: 2012-03-10 12:07:22

On Mar 10, 2012, at 8:44 AM, lcaminiti wrote:
> lcaminiti wrote
>> Stewart, Robert wrote
>>> Marshall Clow wrote:
>>>> On Feb 26, 2012, at 10:50 AM, lcaminiti wrote:
>>>>> I have an aesthetic question. Boost.Algorithm puts C++11
>>>>> algorithms like all_of into a directory
>>>>> boost/algorithm/cxx11. Would the directory name
>>>>> boost/algorithm/cpp11 be preferred?
>>>>> I think for file names .cpp and .hpp are Boost choice over
>>>>> .cxx and .hxx. But for directory names instead cxx11 is Boost
>>>>> choice over cpp11? Similarly, shall macros that refer to
>>>>> C++11 be named BOOST_..._CPP11_... or BOOST_..._CXX11_...?
>>>> Just to let you know, the directory boost/algorithm/cxx11 has
>>>> not been a part of any boost release yet (it will be part
>>>> of1.50), so changing it should not break any existing code.
>>>> As to using cxx11 vs cpp11, I don't really have a preference.
>>> As Lorenzo notes, the suffixes suggest that the directory names should
>>> use "cpp", too, but there is a difference. In "cxx11", the "cxx" is in
>>> reference to a standard version, rather than to the language itself, so a
>>> distinction might be appropriate.
>>> I, too, don't really have a preference. However, the directories and
>>> corresponding macros should use p/P or x/X consistently.
>> 1. Yes, I should have pointed out that Algorithm uses cxx11 only in trunk
>> so all options are on the table (no user code will brake if we change
>> that).
>> 2. Yes, as a user I'd be OK with "I use .cpp/.hpp for file names but
>> cxx/CXX for naming the language standard".
>> In the ScopeExit improvements I used a macro
>> BOOST_SCOPE_EXIT_CONFIG_NO_CPP11 to force disabling implementation that
>> uses C++11 features (lamba functions and auto declarations) even on C++11
>> compilers. That's also just in the trunk so I can easily change it to
>> Are there other Boost libraries (better if already released) that have
>> used cpp/CPP over cxx/CXX to refer to the standard name? That could be
>> used as a precedence to make a decision keeping consistency while braking
>> no existing code.
>> Thanks.
>> --Lorenzo
> It looks like other Boost libraries are using CXX (and not CPP):

Thats because I just changed all those macros from BOOST_NO_0X_* to BOOST_NO_CXX11_* last weekend.

> Then I think we can proclame Boost convention to be .[ch]pp for file names,
> CXX for macros, and cxx for directories (and also cxx for code symbol names
> other than macros?).
> Boost.Algorithm keeps cxx11 as the directory name and I change
> extensions in trunk.

Works for me.

-- Marshall

Marshall Clow Idio Software <mailto:mclow.lists_at_[hidden]>

A.D. 1517: Martin Luther nails his 95 Theses to the church door and is promptly moderated down to (-1, Flamebait).
        -- Yu Suzuki

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