ALL_THENThm_cont.ALL_THEN : thm_tactical
Passes a theorem unchanged to a theorem-tactic.
For any theorem-tactic ttac and theorem th,
the application ALL_THEN ttac th results simply in
ttac th, that is, the theorem is passed unchanged to the
theorem-tactic. ALL_THEN is the identity
theorem-tactical.
The application of ALL_THEN to a theorem-tactic never
fails. The resulting theorem-tactic fails under exactly the same
conditions as the original one.
Writing compound tactics or tacticals, e.g. terminating list iterations of theorem-tacticals.
Tactical.ALL_TAC, Tactical.FAIL_TAC, Tactical.NO_TAC, Thm_cont.NO_THEN, Thm_cont.THEN_TCL, Thm_cont.ORELSE_TCL