public static HashSet <string /*!*/> /*!*/ FindLabels(VCExpr /*!*/ expr)
{
Contract.Requires(expr != null);
Contract.Ensures(cce.NonNull(Contract.Result <HashSet <string /*!*/> /*!*/>()));
FindLabelsVisitor visitor = new FindLabelsVisitor();
visitor.Traverse(expr, true);
return(visitor.Labels);
}
public void NewProblem(string descriptiveName, VCExpr vc, ProverInterface.ErrorHandler handler)
{
Contract.Requires(descriptiveName != null);
Contract.Requires(vc != null);
Contract.Requires(handler != null);
HashSet <string /*!*/> /*!*/ labels = FindLabelsVisitor.FindLabels(vc);
Contract.Assert(labels != null);
toInspector.WriteLine("PROBLEM " + descriptiveName);
toInspector.WriteLine("TOKEN BEGIN");
foreach (string lab in labels)
{
Contract.Assert(lab != null);
string no = lab.Substring(1);
Absy absy = handler.Label2Absy(no);
IToken tok = absy.tok;
AssertCmd assrt = absy as AssertCmd;
Block blk = absy as Block;
string val = tok.val; // might require computation, so cache it
if (val == "foo" || tok.filename == null)
{
continue; // no token
}
toInspector.Write("TOKEN ");
toInspector.Write(lab);
toInspector.Write(" ");
if (assrt != null)
{
toInspector.Write("ASSERT");
string errData = assrt.ErrorData as string;
if (errData != null)
{
val = errData;
}
else if (assrt.ErrorMessage != null)
{
val = assrt.ErrorMessage;
}
}
else if (blk != null)
{
toInspector.Write("BLOCK ");
toInspector.Write(blk.Label);
}
else
{
Contract.Assume(false);
}
if (val == null || val == "assert" || val == "ensures")
{
val = "";
}
if (absy is LoopInitAssertCmd)
{
val += " (loop entry)";
}
else if (absy is LoopInvMaintainedAssertCmd)
{
val += " (loop body)";
}
else if (val.IndexOf("#VCCERR") >= 0)
{
// skip further transformations
}
else if (absy is AssertRequiresCmd)
{
AssertRequiresCmd req = (AssertRequiresCmd)absy;
IToken t2 = req.Requires.tok;
string tval = t2.val;
if (tval == "requires")
{
tval = string.Format("{0}({1},{2}))", t2.filename, t2.line, t2.col);
}
string call = "";
if (val != "call")
{
call = " in call to " + val;
}
val = string.Format("precondition {0}{1}", tval, call);
}
val = val.Replace("\r", "").Replace("\n", " ");
toInspector.WriteLine(string.Format(" {0} {1} :@:{2}:@:{3}", tok.line, tok.col, tok.filename, val));
}
toInspector.WriteLine("TOKEN END");
}