Anna Gringauze 5016ce4a4d Dev/annagrin/opt neg branch (#721) ... * Added c++17 test configurations for clang5.0 and clang6.0 * Added optimization that removes a branch from span::operator[] * minor beauty fix * added a better message for the optimization, fixed signed/unsigned warning * better check fir wrap-around possibility		2018-08-17 11:36:06 -07:00
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gsl	Dev/annagrin/opt neg branch (#721)	2018-08-17 11:36:06 -07:00