module Abstract1:sig..end
val is_polkagrid : 'a Apron.Abstract1.t -> boolReturn true iff the argument manager is a polkagrid value
val of_polkagrid : 'a PolkaGrid.t Apron.Abstract1.t -> 'b Apron.Abstract1.tMakes a polkagrid value generic
val to_polkagrid : 'a Apron.Abstract1.t -> 'b PolkaGrid.t Apron.Abstract1.tInstanciate the type of a polkagrid value.
Raises Failure if the argument manager is not a polkagrid manager