import std.stdio, std.array, std.range, std.algorithm; int f(int e) { return e * -1; } void main() { int[] r = [-1,-2,-3,4,5,6]; { int[] a = [1,2,3], b = [4,5,6]; auto m = map!(f)(a); //auto x = chain(m,b); // chainがrangeのmを受け取ってく…