#pragma once Versus #if !defined MYHEADER_INCLUDED_

Posted by bdhar on Stack Overflow See other posts from Stack Overflow or by bdhar
Published on 2010-06-03T07:44:57Z Indexed on 2010/06/03 7:54 UTC
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What is/are the differences (in performance/usability/functionality) in using #pragma once and #if !defined MYHEADER_INCLUDED_ constructs? Or what is the difference between the two?

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