Flag proposal

[Andrei Alexandrescu]

On 6/11/11 2:12 PM, Robert Clipsham wrote:
> On 11/06/2011 12:54, Andrei Alexandrescu wrote:
>> Consider two statements:
>>
>> 1. "I dislike Flag. It looks ugly to me."
>
> This statement holds true for me.
>
>> 2. "I dislike Flag. Instead I want named arguments."
>
> This one is perhaps true. I've never needed named arguments.
>
>> There is little retort to (1) - it simply counts as a vote against. For
>> (2) the course of action is to point out the liabilities of changing the
>> language.
>>
>> Andrei
>
> So I had an idea.
>
> ----
> struct Flag
> {
> static bool opDispatch(string n)()
> {
> static if (n[0..2] == "no")
> {
> return false;
> }
> else
> {
> return true;
> }
> }
> }
>
> void myFunc(bool foo, bool bar)
> {
> }
>
> void main()
> {
> myFunc(Flag.foo, Flag.noBar);
> }
> ----
>
> * No ugly templates
> * Self documenting
> * No overhead (dmd can inline it to myFunc(true, false))
> * Caller decides if they want it

// Generate document in nook format
generatePdf("doc.pdf", Flag.nook);


Andrei