Parameterized enum does not work

[Andre via Digitalmars-d-learn]

Hi,

Should following coding work?
string lpad(ubyte length, long n)
{
        import std.string: rightJustify;
        import std.conv: to;
        return rightJustify(to!string(n), length, '0');
}
        
enum lpad14(long n) = lpad(14, n);

void main()
{
        lpad14(123);
}

There is following error from dmd:

source\app.d(12): Error: template app.lpad14 cannot deduce 
function from argumen
t types !()(int), candidates are:
source\app.d(8):        app.lpad14(long n)

Kind regards
André