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<=>(?BoolExprX, ?BoolExprY, ?Bool)

Bool is the truth value of the equivalence BoolExprX <=> BoolExprY being true.
BoolExprX
0/1-valued expression, such as reified constraint
BoolExprY
0/1-valued expression, such as reified constraint
Bool
Truth value of the implication

Description

Equivalent to BX #= BoolExprX, BY #= BoolExprY, Bool #= (BX #= BY)

If BoolExprX and BoolExprY are constraints that have a corresponding reified form, Bool reflects the truth of BoolExprX being equivalent, i.e. either both true or both false.

See Also

<=> / 2, neg / 2, or / 3, and / 3, => / 3