protected ProofOutcome GenericAddPreconditions(ProofObligation obl, IEnumerable <BoxedExpression> preconditions, ProofOutcome originalOutcome,
InferenceDB preconditionDB, PreconditionChecker checkPrecondition)
{
var outcome = originalOutcome;
foreach (var pre in preconditions)
{
if (pre == null)
{
continue;
}
// 1. Simplify the expression
var simplified = SimplifyAndFix(obl.PCForValidation, pre);
if (simplified == null)
{
continue;
}
if (DisjunctivePreconditionsAreDisallowed(simplified))
{
continue;
}
// 2. Have we already seen this precondition?
if (preconditionDB.TryLookUp(obl, simplified, out outcome))
{
continue;
}
else
{
outcome = originalOutcome;
}
// 3. See if it is valid
if (checkPrecondition(simplified, outcome, out outcome))
{
preconditionDB.Add(obl, simplified, outcome);
}
}
return(outcome);
}
public PostExtractorChecker(
ContractNodes usedToExtract,
Action<System.CodeDom.Compiler.CompilerError> errorHandler,
bool allowPreconditionsInOverrides, bool fSharp, bool explicitUserValidations,
bool addInterfaceWrappersWhenNeeded, int runtimeCheckingLevel)
{
Contract.Requires(errorHandler != null);
Contract.Requires(usedToExtract != null);
this.m_errorHandler = errorHandler;
this.allowPreconditionsInOverrides = allowPreconditionsInOverrides;
this.explicitUserValidations = explicitUserValidations;
this.addInterfaceWrappersWhenNeeded = addInterfaceWrappersWhenNeeded;
this.runtimeCheckingLevel = runtimeCheckingLevel;
this.purityChecker = new PurityChecker(this.HandleError, fSharp, usedToExtract);
this.preconditionChecker = new PreconditionChecker(this.HandleError, usedToExtract);
this.postconditionChecker = new PostconditionChecker(this.HandleError, fSharp);
this.invariantCallChecker = new CheckForCallsToInvariantMethods(this);
this.methodBodyChecker = new MethodBodyChecker(this.HandleError, usedToExtract);
this.invariantChecker = new InvariantChecker(this.HandleError, usedToExtract);
this.contractNodes = usedToExtract;
this.visibilityChecker = new VisibilityChecker(this.HandleError, usedToExtract);
this.invariantMethods = new TrivialHashtable(0);
}
