private void VisitFunction(Function function)
{
Debug.Assert(function.OutParams.Count == 1);
for (QKeyValue kv = function.Attributes; kv != null; kv = kv.Next)
{
if (kv.Key != CivlAttributes.WITNESS)
{
continue;
}
if (kv.Params.Count == 3 &&
kv.Params[0] is string witnessedVariableName &&
kv.Params[1] is string firstActionName &&
kv.Params[2] is string secondActionName)
{
witnessedVariable = ctc.sharedVariables.Find(v => v.Name == witnessedVariableName);
if (witnessedVariable == null)
{
ctc.Error(kv, $"Could not find shared variable {witnessedVariableName}");
}
else if (!function.OutParams[0].TypedIdent.Type.Equals(witnessedVariable.TypedIdent.Type))
{
ctc.Error(function, "Result type does not match witnessed variable");
}
firstAction = ctc.FindAtomicAction(firstActionName);
secondAction = ctc.FindAtomicAction(secondActionName);
if (firstAction == null)
{
ctc.Error(kv, $"Could not find atomic action {firstActionName}");
}
if (secondAction == null)
{
ctc.Error(kv, $"Could not find atomic action {firstActionName}");
}
if (firstAction != null && secondAction != null)
{
CheckInParams(function.InParams);
}
allWitnessFunctions.Add(new WitnessFunction(function, witnessedVariable,
firstAction, secondAction, args));
}
