YesOrNo: useful idiom helper or wanking?

[spir]

On 04/11/2011 08:16 PM, KennyTM~ wrote:
> import std.stdio;
>
> template YesOrNo(T) if(is(T == enum) && !T.no && T.yes) {
>      alias T YesOrNo;
> }
>
> enum Redraw : bool { no, yes }
>
> void drawCircle(YesOrNo!Redraw redraw) {
>      writeln(cast(bool) redraw);
> }
>
> void main() {
>      drawCircle(Redraw.yes);
>      drawCircle(Redraw.no);
>      // drawCircle(false);  (cannot implicitly convert expression (false) of
> type bool to Redraw)
> }

If this gets used, would be good style to name the enum using the argument name 
Capitalised, just like in your example (redraw --> Redraw).

Denis
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