public override IPStmt VisitReceiveStmt(PParser.ReceiveStmtContext context)
{
// TODO: can receive statements have event variables as their cases?
var cases = new Dictionary <PEvent, Function>();
foreach (PParser.RecvCaseContext caseContext in context.recvCase())
{
var recvHandler =
new Function(caseContext.anonEventHandler())
{
Scope = table.MakeChildScope(),
Owner = method.Owner,
Role = FunctionRole.ReceiveHandler
};
if (caseContext.anonEventHandler().funParam() is PParser.FunParamContext param)
{
Variable paramVar = recvHandler.Scope.Put(param.name.GetText(), param, VariableRole.Param);
paramVar.Type = TypeResolver.ResolveType(param.type(), recvHandler.Scope, handler);
recvHandler.Signature.Parameters.Add(paramVar);
}
FunctionBodyVisitor.PopulateMethod(handler, recvHandler);
foreach (PParser.EventIdContext eventIdContext in caseContext.eventList().eventId())
{
if (!table.Lookup(eventIdContext.GetText(), out PEvent pEvent))
{
throw handler.MissingDeclaration(eventIdContext, "event", eventIdContext.GetText());
}
if (cases.ContainsKey(pEvent))
{
throw handler.IssueError(eventIdContext, $"duplicate case for event {pEvent.Name} in receive");
}
PLanguageType expectedType =
recvHandler.Signature.ParameterTypes.ElementAtOrDefault(0) ?? PrimitiveType.Null;
if (!expectedType.IsAssignableFrom(pEvent.PayloadType))
{
throw handler.TypeMismatch(caseContext.anonEventHandler().funParam(), expectedType,
pEvent.PayloadType);
}
cases.Add(pEvent, recvHandler);
}
}
return(new ReceiveStmt(context, cases));
}