1.1 --- a/src/Provers/quantifier1.ML Tue Aug 17 12:30:31 2010 +0200
1.2 +++ b/src/Provers/quantifier1.ML Tue Aug 17 12:49:43 2010 +0200
1.3 @@ -113,8 +113,13 @@
1.4 in exqu [] end;
1.5
1.6 fun prove_conv tac thy tu =
1.7 - Goal.prove (ProofContext.init_global thy) [] [] (Logic.mk_equals tu)
1.8 - (K (rtac iff_reflection 1 THEN tac));
1.9 + let val ctxt = ProofContext.init_global thy;
1.10 + val eq_tu = Logic.mk_equals tu;
1.11 + val ([fixed_goal], ctxt') = Variable.import_terms true [eq_tu] ctxt;
1.12 + val thm = Goal.prove ctxt' [] [] fixed_goal
1.13 + (K (rtac iff_reflection 1 THEN tac));
1.14 + val [gen_thm] = Variable.export ctxt' ctxt [thm];
1.15 + in gen_thm end;
1.16
1.17 fun qcomm_tac qcomm qI i = REPEAT_DETERM (rtac qcomm i THEN rtac qI i)
1.18