DISJ1_TAC : tactic

SYNOPSIS
Selects the left disjunct of a disjunctive goal.

DESCRIPTION
   A ?- t1 \/ t2
  ===============  DISJ1_TAC
     A ?- t1

FAILURE CONDITIONS
Fails if the goal is not a disjunction.

SEE ALSO
DISJ1, DISJ2, DISJ2_TAC.