import std.format : format;

​

​

/// Format pattern string passed at compile-time

auto format2(string fmt, Args...)(Args args)

{

    return format!fmt(args);

}

​

​

/// Format pattern and extra prefix string passed at compile-time

auto format2(string prefix, string fmt, Args...)(Args args)

{

    // Modify the format string as you please

    enum prefixedFmt = prefix ~ fmt;

    return format!prefixedFmt(args);

}

​

​

/// Normal runtime format

auto format2(Args...)(Args args)

{

    return format(args);

}

​

​

void main()

{

    assert(format2!"%s %d %s"("bar", 456, false) == "bar 456 false");   // overload 1

    assert(format2!("%d:", "%s %d")(789, "baz", 901) == "789:baz 901"); // overload 2

    assert(format2("%s %d %s", "foo", 123, true) == "foo 123 true");    // overload 3

}