void main()

{

    import std.meta : AliasSeq;

    import std.stdio : writefln;

    immutable fmt = "prefix %s %(%s%) %s postfix";

    alias values = AliasSeq!(true, 1, 3.14, 'a', wchar('ä'), "a\nbc", "ä\nbc"w, [ 0, 1 ], [ "a": 1, "b": 2 ]);

    static foreach (value; values)

    {

        writefln!fmt("before", [value], "after");

    }

}