-foo x = <[ ~~x ]>
-foo' = unG . pga_flatten . foo . pga_unflatten
---foo x z = <[ let y = ~~x in ~~z y y ]>
-main = tikz (foo' (PGArrowD { unG = TikZ_const 12 }))
+{-
+foo :: (forall g a . <[ () -> a
+ PGArrow g (GArrowUnit g) a ->
+ (forall b . PGArrow g (GArrowTensor g b b) b) ->
+-}
+--foo con mer = <[ ~~mer ~~con ~~con ]>
+foo f = <[ ~~f ]>
+
+--tester2 f = <[ \x -> ~~f x x ]>
+
+main = tikz' $ \a b -> pga_flatten (foo (pga_unflatten a))