eliminates shadow warnings from enumerate
eliminates shadow warnings from enumerate

ryanhaining/cppitertools,tempbottle/cppitertools,ryanhaining/cppitertools,tempbottle/cppitertools,ryanhaining/cppitertools,jkhoogland/cppitertools,jkhoogland/cppitertools,jkhoogland/cppitertools,tempbottle/cppitertools