
<ConsistencyModule:> +ConX xor +ConY

   One of the constraints ConX or ConY must be true.

Arguments
   ConX                Constraint
   ConY                Constraint

Type
   library(gfd)

Description

   Equivalent to BX #= (ConX), BY #= (ConY), BX + BY #= 1
   
   The two constraints are reified in such a way that one and only one must be
   true.  ConX and ConY must be constraints that have a corresponding
   reified form.

   ConsistencyModule is the optional module specification to give the 
   consistency level for the propagation for this constraint: 
   gfd_bc for bounds consistency, and gfd_gac for domain (generalised arc) 
   consistency. 

   This constraint is implemented using Gecode's MiniModel's rel() for
   both integer and boolean expressions, with sub-expressions/constraints
   not supported by MiniModel factored out and posted as auxiliary 
   constraints.



Modules
   This predicate is sensitive to its module context (tool predicate, see @/2).

See Also
   xor / 3, neg / 1, or / 2, and / 2, => / 2, <=> / 2, suspend : #\= / 2, ic : #\= / 2, fd : #\= / 2
