Compose

import std.range: ElementType;

alias ArrayOf (T) = T[];
alias Const (T) = const(T);

alias C0 = Compose!(ElementType, ArrayOf);
alias C1 = Compose!(ArrayOf, ElementType);
alias C2 = Compose!(ElementType, Const, C0);
alias C3 = Compose!(ArrayOf, Unqual, C2);

alias T = int[5];

static assert (is (C0!T == int[5]));
static assert (is (C1!T == int[]));
static assert (is (C2!T == const(int)));
static assert (is (C3!T == int[]));