Function copy

Like std.file.copy, but supports Path, command echoing and dryrun.

void copy (
  const(Path) from,
  const(Path) to
);

void copy (
  const(string) from,
  const(Path) to
);

void copy (
  const(Path) from,
  const(string) to
);

void copy (
  const(string) from,
  const(string) to
);