Eugene Wee wrote:
Sutter and Alexandrescu say the same in C++ Coding Standards Item #24, but with admonishment to keep all other code and comments in between to cater for less intelligent detection of include guards (whereas many header files in Boost have comments right at the top).
Personally I'd be in favor of having the include guard starting right at the top, instead of starting with a few lines of comment. Although I don't know if doing so would significantly improve compilation times. Does it? Steven Watanabe wrote:
IMO, there is absolutely no reason to /rely/ on non-standard features even if /all/ compilers supported it in this case.
BTW, #pragma once has been discussed extensively at comp.std.c++, December 2007: "#pragma once in ISO standard yet?" http://groups.google.com/group/comp.std.c++/browse_thread/thread/c527240043c... Apparently it's hard to implement such a #pragma in a reliable way. There's also a related ticket: https://svn.boost.org/trac/boost/ticket/1532 HTH, Niels -- Niels Dekker http://www.xs4all.nl/~nd/dekkerware Scientific programmer at LKEB, Leiden University Medical Center