Method operator-

inst/include/Rcpp/internal/Proxy_Iterator.h:68–70

			return Proxy_Iterator( PROXY(*proxy.parent, proxy.index + n) ) ;
		}
		inline Proxy_Iterator operator-(difference_type n) const {
			return Proxy_Iterator( PROXY(*proxy.parent, proxy.index - n) ) ;
		}

		inline Proxy_Iterator& operator+=(difference_type n) {
			proxy.move( n ) ;