Parsing string to octal(for umask) at runtime?

[Ryan David Sheasby]

On Friday, 22 December 2017 at 21:36:20 UTC, Ryan David Sheasby 
wrote:
> Hi. Struggling to figure this out. At the bottom of this page: 
> https://dlang.org/library/std/conv/octal.html is a vague 
> reference to using parse. However, when I use what I would 
> assume to be correct based on this: 
> https://dlang.org/phobos/std_conv.html#.parse.3 and the fact 
> that in the octal page it says octal is also a enum, I see no 
> reason this syntax shouldn't work:
>
> import std.conv;
>
> umaskVal = parse!octal(data.umask);
>
> Yet I get an error saying the compiler cannot deduce which 
> overload of parse to use... How do I do this parse? Am I going 
> about this the wrong way? Is there a better way to parse a 
> string as a normal base8 ushort?

Nevermind. I've just figured it out from this forum post :-) 
http://forum.dlang.org/thread/nbvdebjxodabukfbeheq@forum.dlang.org

All I needed to do was:

umaskVal = parse!ushort(data.umask, 8);