This mirrors the (>>) found in Haskell, which is the same as (>>=), except the
second computation (on the right hand side) takes no arguments, and the result
of the first computation is discarded. This is a trivial implementation written
in terms of (>>=).
useful items for applying multiple predicates, e.g.
sortBy (comparing length <+> compare)
To sort some lists elements by length and then lexographically
For Void and Either
This is because I ended up using them elsewhere, so why not include them in the stdlib.
Also expose left/rightInjective functions, as are used in the DecEq proofs.
This is partly to tidy things up, but also a good test for 'import as'.
Requires some internal changes since there are parts of reflection,
unelaboration and a compiler hack that rely on where things are in the
Prelude.
This is helpful when defining auto-implicits of the form:
pairEqF : DecEq a
=> (thisX, x, y : a)
-> {prfRefl : Equal x thisX}
-> (prfEq : decEq x thisX = Yes prfRefl)
=> Pair a a
pairEqF thisX x y {prfRefl} {prfEq} = MkPair x y
before auto-implicit search would fail to find `Refl` for `prfRefl`.
With this fix the solution is found.
This fix means we can avoid having to write the following.
pairEqF' : DecEq a
=> (thisX, x, y : a)
-> (prfEq : decEq x thisX = Yes (the (Equal x x) Refl))
=> Pair a a
pairEqF' thisX x y {prfEq} = MkPair x y
There is an argument that, for import public, this should be automatic
(that is, the publicly imported things should be reexported with the
parent namespace). I decided not to do this, because another use of
import public which we do a lot in the Idris 2 code base is purely as a
convenience, where we still expect things to be in their original
namespace.
Also, where there's a choice between things being explicit and implicit,
I prefer to err on the side of explicit now.
So, if what you really want in an API is to reexport, you can do that,
but explicitly.
Conditional variables with timeout in Chez didn't work, so changed to a
consistent meaning of the timeout (microseconds). Also fix linearity of
unsafePerformIO.
