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List:       glibc-help
Subject:    Type of FD_ISSET happens to be bool in C++
From:       sbergman () redhat ! com (Stephan Bergmann)
Date:       2014-11-19 11:14:00
Message-ID: 546C7BAC.6080405 () redhat ! com
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While SUS mandates FD_ISSET to have return type int (in C, which is all 
SUS is concerned with), the definition

> #define __FD_ISSET(d, set) \
>   ((__FDS_BITS (set)[__FD_ELT (d)] & __FD_MASK (d)) != 0)

in bits/select.h causes it to have type bool instead in C++.  Is that by 
design or by accident?


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