private static bool ShallowEq(MemberSelectExpr expr1, MemberSelectExpr expr2)
{
return(expr1.MemberName == expr2.MemberName &&
expr1.Member == expr2.Member &&
TriggerUtils.SameLists(expr1.TypeApplication_AtEnclosingClass, expr2.TypeApplication_AtEnclosingClass, TypeEq) &&
TriggerUtils.SameLists(expr1.TypeApplication_JustMember, expr2.TypeApplication_JustMember, TypeEq));
}
internal static bool ExpressionEq(this Expression expr1, Expression expr2)
{
expr1 = expr1.Resolved;
expr2 = expr2.Resolved;
return(ShallowEq_Top(expr1, expr2) && TriggerUtils.SameLists(expr1.SubExpressions, expr2.SubExpressions, (e1, e2) => ExpressionEq(e1, e2)));
}
private static bool ShallowEq(ComprehensionExpr expr1, ComprehensionExpr expr2)
{
if (!TriggerUtils.SameLists(expr1.BoundVars, expr2.BoundVars, SameBoundVar) ||
!ShallowSameAttributes(expr1.Attributes, expr2.Attributes) ||
// Filled in during resolution: !SameLists(expr1.Bounds, expr2.Bounds, ReferenceCompare) ||
// !SameLists(expr1.MissingBounds, expr2.MissingBounds, SameBoundVar) ||
!TriggerUtils.SameNullity(expr1.Range, expr2.Range)) //TODO Check
{
return(false);
}
if (expr1 is LambdaExpr && expr2 is LambdaExpr)
{
return(ShallowEq((LambdaExpr)expr1, (LambdaExpr)expr2));
}
else if (expr1 is MapComprehension && expr2 is MapComprehension)
{
return(ShallowEq((MapComprehension)expr1, (MapComprehension)expr2));
}
else if (expr1 is SetComprehension && expr2 is SetComprehension)
{
return(ShallowEq((SetComprehension)expr1, (SetComprehension)expr2));
}
else if (expr1 is QuantifierExpr && expr2 is QuantifierExpr)
{
return(ShallowEq((QuantifierExpr)expr1, (QuantifierExpr)expr2));
}
else
{
return(false); // ComprehensionExpr is abstract
}
}
internal static bool MatchesTrigger(this Expression expr, Expression trigger, ISet <BoundVar> holes, Dictionary <IVariable, Expression> bindings)
{
expr = expr.Resolved;
trigger = trigger.Resolved;
if (trigger is IdentifierExpr)
{
var var = ((IdentifierExpr)trigger).Var;
if (holes.Contains(var))
{
Expression existing_binding = null;
if (bindings.TryGetValue(var, out existing_binding))
{
return(ExpressionEq(expr, existing_binding));
}
else
{
bindings[var] = expr;
return(true);
}
}
}
return(ShallowEq_Top(expr, trigger) && TriggerUtils.SameLists(expr.SubExpressions, trigger.SubExpressions, (e1, e2) => MatchesTrigger(e1, e2, holes, bindings)));
}
private static bool ShallowEq(DatatypeValue expr1, DatatypeValue expr2)
{
return // Implied by Ctor equality: expr1.DatatypeName == expr2.DatatypeName &&
// Implied by Ctor equality: expr1.MemberName == expr2.MemberName &&
(expr1.Ctor == expr2.Ctor &&
// Contextual information: expr1.IsCoCall == expr2.IsCoCall &&
TriggerUtils.SameLists(expr1.InferredTypeArgs, expr2.InferredTypeArgs, TypeEq));
}
internal static bool ExpressionEqModuloExpressionsNotInvolvingBoundVariables(this Expression expr1, Expression expr2, ISet <BoundVar> boundVars)
{
expr1 = expr1.Resolved;
expr2 = expr2.Resolved;
if (expr1 is IdentifierExpr)
{
if (expr2 is IdentifierExpr)
{
return(true);
}
else
{
var freeInE2 = Translator.ComputeFreeVariables(expr2);
freeInE2.IntersectWith(boundVars);
return(!freeInE2.Any());
}
}
return(ShallowEq_Top(expr1, expr2) && TriggerUtils.SameLists(expr1.SubExpressions,
expr2.SubExpressions, (e1, e2) => ExpressionEqModuloExpressionsNotInvolvingBoundVariables(e1, e2, boundVars)));
}
private static bool ShallowSameAttributes(Attributes attributes1, Attributes attributes2)
{
return(TriggerUtils.SameLists(attributes1.AsEnumerable(), attributes2.AsEnumerable(), ShallowSameSingleAttribute));
}
private static bool SameTriggerCandidate(TriggerCandidate arg1, TriggerCandidate arg2)
{
return(TriggerUtils.SameLists(arg1.Terms, arg2.Terms, TriggerTerm.Eq));
}
private bool HasSameTriggers(QuantifierWithTriggers one, QuantifierWithTriggers other)
{
return(TriggerUtils.SameLists(one.Candidates, other.Candidates, SameTriggerCandidate));
}
private static bool ShallowEq(MemberSelectExpr expr1, MemberSelectExpr expr2)
{
return(expr1.MemberName == expr2.MemberName &&
expr1.Member == expr2.Member &&
TriggerUtils.SameLists(expr1.TypeApplication, expr2.TypeApplication, Microsoft.Dafny.Type.Equals));
}
private static bool ShallowEq(MemberSelectExpr expr1, MemberSelectExpr expr2)
{
return(expr1.MemberName == expr2.MemberName &&
expr1.Member == expr2.Member &&
TriggerUtils.SameLists(expr1.TypeApplication, expr2.TypeApplication, TypeEq));
}