public bool InstantiateBoundType(Type t, out object result, IWarningLogger log)
{
object init_obj;
result = null;
object[] attrs = t.GetCustomAttributes(typeof(StructureBindingAttribute), false);
if (attrs == null || attrs.Length == 0)
{
init_obj = null;
}
else
{
StructureBindingAttribute sba = attrs[0] as StructureBindingAttribute;
if (!sba.UsesStructure)
{
init_obj = null;
}
else
{
Type stype = sba.StructureType;
if (!known_structs.ContainsKey(stype))
{
string s = String.Format("Type {0} must be created in the context of a {1} structure, " +
"but none is referenced in this scope.", t, stype);
log.Error(9999, s, null);
return(true);
}
init_obj = known_structs[stype];
}
}
result = Activator.CreateInstance(t, init_obj);
return(false);
}
public UserType ResolveUsedStructureType(TypeResolveContext trc, bool errors)
{
if (!resolved)
{
if (errors)
{
throw new InvalidOperationException();
}
return(null);
}
UserType ret;
if (IsUser)
{
// User type. Use our lookup tables
StructureBoundItem sbi = trc.Driver.GetUserTypeItem((string)t) as StructureBoundItem;
if (sbi == null)
{
if (errors)
{
throw ExHelp.App("Expected structure bound item but got {0} for {1}",
trc.Driver.GetUserTypeItem((string)t), this);
}
return(null);
}
if (!sbi.UsesStructure)
{
return(null);
}
ret = sbi.NS.ParamsType;
}
else
{
// System type. Use reflection.
Type type = (Type)t;
object[] attrs = type.GetCustomAttributes(typeof(StructureBindingAttribute), false);
if (attrs.Length == 0)
{
throw ExHelp.App("Expected type {0} to have a StructureBindingAttribute " +
"but it didn't", type);
}
StructureBindingAttribute attr = (StructureBindingAttribute)attrs[0];
if (!attr.UsesStructure)
{
return(null);
}
ret = new UserType(attr.StructureType);
}
if (ret.Resolve(trc, errors))
{
if (errors)
{
throw ExHelp.App("Failed to resolve bound structure type {0}", ret);
}
return(null);
}
return(ret);
}