Alloc.AxisRepresents a mode axis in this product whose constant is 'a, and whose allowance is 'd1 given the product's allowance 'd0.
include Mode_intf.Axis with type 'a t := 'a tCompare two axes in implication order. If A implies B, then A is before B.
val print : Format.formatter -> 'a t -> unitval all : packed listList of all axes, ordered by compare.