public ProgramState SetConstraint(SymbolicValue symbolicValue, SymbolicValueConstraint constraint)
{
if (constraint == null)
{
return(this);
}
var updatedConstraintsMap = Constraints.AddConstraintForSymbolicValue(symbolicValue, constraint);
updatedConstraintsMap = updatedConstraintsMap.AddConstraintTo <EqualsRelationship>(symbolicValue,
constraint, this);
if (constraint is BoolConstraint)
{
updatedConstraintsMap = updatedConstraintsMap.AddConstraintTo <NotEqualsRelationship>(symbolicValue,
constraint.OppositeForLogicalNot, this);
}
return(new ProgramState(
Values,
updatedConstraintsMap,
ProgramPointVisitCounts,
ExpressionStack,
Relationships));
}
public virtual IEnumerable <ProgramState> TrySetConstraint(SymbolicValueConstraint constraint,
ProgramState programState)
{
if (constraint == null)
{
return(new[] { programState });
}
if (!programState.Constraints.TryGetValue(this, out var oldConstraints))
{
return(new[] { programState.SetConstraint(this, constraint) });
}
if (constraint is BoolConstraint boolConstraint)
{
return(TrySetBoolConstraint(boolConstraint, oldConstraints, programState));
}
if (constraint is ObjectConstraint objectConstraint)
{
return(TrySetObjectConstraint(objectConstraint, oldConstraints, programState));
}
if (constraint is NullableValueConstraint ||
constraint is DisposableConstraint ||
constraint is CollectionCapacityConstraint)
{
return(new[] { programState });
}
throw new NotSupportedException($"Neither one of {nameof(BoolConstraint)}, {nameof(ObjectConstraint)}, " +
$"{nameof(ObjectConstraint)}, {nameof(DisposableConstraint)}, {nameof(CollectionCapacityConstraint)}.");
}
public bool HasConstraint(SymbolicValue symbolicValue, SymbolicValueConstraint constraint)
{
SymbolicValueConstraints constraints;
return(Constraints.TryGetValue(symbolicValue, out constraints) &&
constraints.HasConstraint(constraint));
}
public static bool HasConstraint(this ISymbol symbol, SymbolicValueConstraint constraint, ProgramState programState)
{
var symbolicValue = programState.GetSymbolValue(symbol);
if (symbolicValue == null)
{
return(false);
}
return(programState.HasConstraint(symbolicValue, constraint));
}
public static ProgramState RemoveConstraint(this ISymbol symbol, SymbolicValueConstraint constraint, ProgramState programState)
{
var symbolicValue = programState.GetSymbolValue(symbol);
if (symbolicValue == null ||
!programState.HasConstraint(symbolicValue, constraint))
{
return(programState);
}
return(programState.RemoveConstraint(symbolicValue, constraint));
}
public ProgramState RemoveConstraint(SymbolicValue symbolicValue, SymbolicValueConstraint constraint)
{
if (constraint == null)
{
return(this);
}
var updatedConstraintsMap = Constraints.RemoveConstraintForSymbolicValue(symbolicValue, constraint);
return(new ProgramState(
Values,
updatedConstraintsMap,
ProgramPointVisitCounts,
ExpressionStack,
Relationships));
}
public virtual IEnumerable <ProgramState> TrySetConstraint(SymbolicValueConstraint constraint,
ProgramState programState)
{
if (constraint == null)
{
return(new[] { programState });
}
// This condition is added first because the way of setting string constraints
// when the value doesnt exist is different than the other types of constraints
if (constraint is StringConstraint stringConstraint)
{
return(TrySetStringConstraint(stringConstraint, programState));
}
if (!programState.Constraints.TryGetValue(this, out var oldConstraints))
{
return(new[] { programState.SetConstraint(this, constraint) });
}
if (constraint is BoolConstraint boolConstraint)
{
return(TrySetBoolConstraint(boolConstraint, oldConstraints, programState));
}
if (constraint is ObjectConstraint objectConstraint)
{
return(TrySetObjectConstraint(objectConstraint, oldConstraints, programState));
}
if (constraint is NullableValueConstraint ||
constraint is DisposableConstraint ||
constraint is CollectionCapacityConstraint ||
constraint is SerializationConstraint)
{
return(new[] { programState });
}
throw new NotSupportedException($"Neither one of {nameof(BoolConstraint)}, {nameof(ObjectConstraint)}, " +
$"{nameof(ObjectConstraint)}, {nameof(DisposableConstraint)}, {nameof(CollectionCapacityConstraint)}," +
$"{nameof(StringConstraint)} or {nameof(SerializationConstraint)}.");
}
public virtual IEnumerable <ProgramState> TrySetOppositeConstraint(SymbolicValueConstraint constraint,
ProgramState programState)
{
return(TrySetConstraint(constraint?.OppositeForLogicalNot, programState));
}