On Sun, Aug 4, 2013 at 12:41 AM, Dan Douglas <orm...@gmail.com> wrote: > On Sunday, August 04, 2013 12:30:48 AM Roland Mainz wrote: >> On Sun, Aug 4, 2013 at 12:04 AM, Dan Douglas <orm...@gmail.com> wrote: >> > Is it specified what the value of x should be after this expression? >> > >> > x=0; : $((x+=x=1)) >> > >> > Bash, ksh93, mksh, posh say 1. zsh, dash, busybox say 2. Clang and gcc >> > both throw warnings about it, but both plus icc agree on 2. >> >> Just curious: Is that x86-specific or is the result always the same on >> other architectures, too ? Maybe there is something in ISO C1X/C99 >> which actually defines or recommends a specific compiler behaviour. >> Maybe we should ask the "clang" people about the "why ?" ... > > I've only tested x86 but my hunch would be it either requires/suggests 2, or > leaves it unspecified.
I'm not sure... but I am away from home and can't check my library for now... ---- Bye, Roland -- __ . . __ (o.\ \/ /.o) roland.ma...@nrubsig.org \__\/\/__/ MPEG specialist, C&&JAVA&&Sun&&Unix programmer /O /==\ O\ TEL +49 641 3992797 (;O/ \/ \O;)
