Closures not yet supported in CTFE's

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On Saturday, 27 July 2013 at 23:54:28 UTC, JS wrote:
> The code wouldn't help because that is not where the error is 
> at. It is because I thought => was used for lambda's as it is 
> in C#. I don't know why there is a special syntax for a direct 
> return.
>
> (string x) => { return x; } is trying to return a function that 
> returns x using closure because of x is outside the inside 
> function.
>
> (string x) { return x; } is what I was trying to do. I knew 
> that (string x) => ...; was simple notation for return ... but 
> didn't think I was returning a function in any way.

It was a source of confusion for me at first as well, as I 
expected `a => { ... }` to behave as it does in C#. That's not 
the case, unfortunately, as { ... } is a delegate literal in D, 
so you have to use the full `(a) { ... }` syntax. It's annoying, 
but somewhat more bearable if you've worked with Javascript or 
LUA before, since they have pretty much the same syntax for 
function literals.