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On 03/21/2013 05:28 PM, Jan Holesovsky wrote:

* Kill include guards in .hxx, and use #pragma once instead
         + makes the headers nicer
         + the benchmark available on the net seems to suggest it speeds
           up MSVC
         + Lubos' test seems to suggest that there is ~no difference for
           gcc
        + consensus: let's just do it after 4.0.2 is out
The only drawback I can find is that #pragma once is non-standard and therefore <http://gcc.gnu.org/onlinedocs/gcc-4.7.2/cpp/Alternatives-to-Wrapper-_0023ifndef.html#Alternatives-to-Wrapper-_0023ifndef>---arguably rightly so---recommends against its use. 

Stephan

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