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DISJ1_TAC                                                     (Tactic)
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DISJ1_TAC : tactic

SYNOPSIS
Selects the left disjunct of a disjunctive goal.

KEYWORDS
tactic, disjunction.

DESCRIBE

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




FAILURE
Fails if the goal is not a disjunction.

SEEALSO
Thm.DISJ1, Thm.DISJ2, Tactic.DISJ2_TAC.

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