On Fri, 4 May 2018 at 01:57 David Demelier wrote:

Just curious, is there some coding convention in boost? I just realized predef is the only one component that I use which use .h header suffix instead of .hpp.

There are some rough guidelines here: https://www.boost.org/development/requirements.html The menu to the right, under Requirements and Guidelines contains a few related links. The relevant bit to your question is this; "Files intended to be processed by a C++ compiler as part of a translation unit should have a three-letter filename extension ending in "pp". Other files should not use extensions ending in "pp". This convention makes it easy to identify all of the C++ source in Boost." So, the .h files don't require a C++ compiler and could be used in C. -- chris

On Fri, May 4, 2018 at 7:34 AM, David Demelier via Boost-users < boost-users@lists.boost.org> wrote:

On Fri, May 04, 2018 at 11:54:41AM +0000, Chris Glover wrote:

...

On Fri, 4 May 2018 at 01:57 David Demelier wrote:

...

Just curious, is there some coding convention in boost? I just realized predef is the only one component that I use which use .h header suffix instead of .hpp.

There are some rough guidelines here:

https://www.boost.org/development/requirements.html

Thanks, that is handy!

...

"Files intended to be processed by a C++ compiler as part of a translation unit should have a three-letter filename extension ending in "pp". Other files should not use extensions ending in "pp". This convention makes it easy to identify all of the C++ source in Boost."

So, the .h files don't require a C++ compiler and could be used in C.

Understood, thanks for that quick replies!

Not just C. The Predef headers where designed to compile with C++, C, Objective C, and Objective C++. Essentially any language that uses the C preprocessor can use the Predef headers. -- -- Rene Rivera -- Grafik - Don't Assume Anything -- Robot Dreams - http://robot-dreams.net