public void SuggestContractsForExtractedMethod(Preconditions postConditionsAsBE, IOutput output)
{
IEnumerable <BoxedExpression> newPreconditions;
if (this.TryInferPreconditionsFromPostconditions(postConditionsAsBE.ToList(), out newPreconditions))
{
var decompiler = new AnalysisWrapper.TypeBindings <Local, Parameter, Method, Field, Property, Event, Type, Attribute, Assembly, Expression, Variable> .BooleanExpressionsDecompiler <LogOptions>(this.MDriver);
var alreadyShown = new Set <string>();
foreach (var p in newPreconditions)
{
var inPreState = PreconditionSuggestion.ExpressionInPreState(p, this.MDriver.Context, this.MDriver.MetaDataDecoder, this.MDriver.CFG.EntryAfterRequires, allowedKinds: ExpressionInPreStateKind.MethodPrecondition);
BoxedExpression decompiled;
if (inPreState != null && decompiler.FixIt(this.MDriver.CFG.EntryAfterRequires, inPreState.expr, out decompiled))
{
var outStr = decompiled.ToString();
if (this.Facts.IsTrue(this.MDriver.CFG.EntryAfterRequires, decompiled) == ProofOutcome.Top && !alreadyShown.Contains(outStr))
{
output.Suggestion(ClousotSuggestion.Kind.Requires, ClousotSuggestion.Kind.Requires.Message(),
this.MDriver.CFG.Entry, string.Format("Extract method suggestion: Contract.Requires({0});", outStr), null, ClousotSuggestion.ExtraSuggestionInfo.None);
alreadyShown.Add(outStr);
}
}
}
}
}
private BoxedExpression SimplifyAndFix(APC pc, BoxedExpression precondition)
{
Contract.Requires(precondition != null);
var decompiler = new AnalysisWrapper.TypeBindings <Local, Parameter, Method, Field, Property, Event, Type, Attribute, Assembly, Expression, Variable> .BooleanExpressionsDecompiler <LogOptions>(mdriver);
BoxedExpression result;
if (decompiler.FixIt(pc, precondition, out result))
{
return(result.Simplify(this.mdriver.MetaDataDecoder));
}
else
{
return(null); // doesn't type check and is not fixable, ignore
}
}