bool TraceMetaPropertyLocation(MetaLocation loc, TraceData trace)
{
if (trace.VisitedLocations.Contains(loc))
{
return(true);
}
trace.VisitedLocations.Add(loc);
var mp = GetProperty(loc);
// Detect circular references (should not happen)
foreach (var ploc in trace.Stack)
{
if (ploc == loc)
{
return(false);
}
}
if (mp.Definitions.Length == 0)
{
trace.Stack.Add(loc);
trace.Errors.Add(new TraceError(mp.Source, ErrorCode.E2508, "Meta property " + mp.Name.Quote() + " has no definitions in " + Path.Quote(), null, trace.Stack.ToArray()));
trace.Stack.RemoveLast();
return(true);
}
trace.Stack.Add(loc);
bool errorsFound = false;
for (int i = 0; i < mp.Definitions.Length; i++)
{
var def = mp.Definitions[i];
foreach (var req in def.Requirements)
{
if (Path.FailedReqStatements.Contains(Tuple.Create(loc, def, req)))
{
errorsFound = true;
switch (req.Type)
{
case ReqStatementType.Object:
{
var ri = req as ReqObject;
trace.Errors.Add(new TraceError(req.Source, ErrorCode.E2500, "An instance of " + ri.ObjectType.Quote() + " is not available in " + Path.Quote(), req, trace.Stack.ToArray()));
break;
}
case ReqStatementType.File:
{
var rf = req as ReqFile;
trace.Errors.Add(new TraceError(req.Source, ErrorCode.E2501, "Required file " + rf.Filename.Quote() + " does not exist", req, trace.Stack.ToArray()));
break;
}
case ReqStatementType.Property:
{
var rmp = req as ReqProperty;
var rloc = TryGetLocation(loc, rmp.PropertyName, rmp.Offset);
if (rloc == null)
{
trace.Errors.Add(new TraceError(req.Source, ErrorCode.E2502, "Meta property " + rmp.PropertyName.Quote() + " was not found in " + Path.Quote(), req, trace.Stack.ToArray()));
break;
}
var rdt = GetProperty(rloc.Value).ReturnType;
if (rmp.PropertyType != null && !rmp.PropertyType.Equals(rdt))
{
trace.Errors.Add(new TraceError(req.Source, ErrorCode.E2503, "Meta property " + rmp.PropertyName.Quote() + " did not have expected type " + rmp.PropertyType.Quote() + " in " + Path.Quote(), req, trace.Stack.ToArray()));
break;
}
if (rmp.Tag != null)
{
var rdef = GetValidDefinition(rloc.Value);
if (rdef != null && !rdef.Tags.Contains(rmp.Tag))
{
trace.Errors.Add(new TraceError(req.Source, ErrorCode.E2504, "Meta property " + rmp.PropertyName.Quote() + " did not specify required tag " + rmp.Tag.Quote() + " in " + Path.Quote(), req, trace.Stack.ToArray()));
break;
}
}
if (!TraceMetaPropertyLocation(rloc.Value, trace))
{
trace.Errors.Add(new TraceError(req.Source, ErrorCode.E2505, "Meta property " + rmp.PropertyName.Quote() + " could not be used in " + Path.Quote(), req, trace.Stack.ToArray()));
break;
}
break;
}
default:
trace.Errors.Add(new TraceError(req.Source, ErrorCode.E2506, "Unsupported req statement", req, trace.Stack.ToArray()));
break;
}
continue;
}
}
}
trace.Stack.RemoveLast();
return(errorsFound);
}