[Agda] complex indices

Andreas Abel andreas.abel at ifi.lmu.de
Wed Feb 22 22:02:41 CET 2012

Why has foo a second argument "Bool" after "true"?

Also, note that the equation

   a = if x then a else a

does not hold definitionally in Agda.  Hence the complaint of Agda.

That Agda prints y as @0 points to some problem in Agda.


On 22.02.12 9:34 PM, Ramana Kumar wrote:
> Why exactly does this fail?
> Should it?
> data foo : (y : Bool) → if y then Set else Set where
>    bar : foo true Bool
> The error I get is
> if @0 then Set else Set != Set of type Set₁
> when checking the definition of foo
> which is a little cryptic (but probably no more so than my declaration).
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Andreas Abel  <><      Du bist der geliebte Mensch.

Theoretical Computer Science, University of Munich
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