public override Choice VisitChoice(Choice node) {
//Contract.Requires(node != null);
Contract.Ensures(Contract.Result<Choice>() != null);
return base.VisitChoice((Choice)node.Clone());
}
public virtual Choice VisitChoice(Choice node) {
Contract.Requires(node != null);
Contract.Ensures(Contract.Result<Choice>() != null);
node.rs = this.VisitRESeq(node.rs);
return node;
}
public override Choice VisitChoice(Choice node)
{
Contract.Ensures(Contract.Result<Choice>() == node);
this.VisitRESeq(node.rs);
return node;
}
public static RE Transform(Block b) {
Contract.Requires(b != null);
Contract.Ensures(Contract.Result<RE>() != null);
TransferCmd tc = b.TransferCmd;
if (tc is ReturnCmd) {
return new AtomicRE(b);
} else if (tc is GotoCmd) {
GotoCmd/*!*/ g = (GotoCmd)tc;
Contract.Assert(g != null);
Contract.Assume(g.labelTargets != null);
if (g.labelTargets.Count == 1) {
return new Sequential(new AtomicRE(b), Transform(cce.NonNull(g.labelTargets[0])));
} else {
List<RE> rs = new List<RE>();
foreach (Block/*!*/ target in g.labelTargets) {
Contract.Assert(target != null);
RE r = Transform(target);
rs.Add(r);
}
RE second = new Choice(rs);
return new Sequential(new AtomicRE(b), second);
}
} else {
Contract.Assume(false);
throw new cce.UnreachableException();
}
}
