public override TypeNode VisitTypeReference(TypeNode type)
{
if (type == null) return null;
TypeNode dup = (TypeNode)this.DuplicateFor[type.UniqueKey];
if (dup != null && (dup.Template != type || this.RecordOriginalAsTemplate)) return dup;
switch (type.NodeType)
{
case NodeType.ArrayType:
ArrayType arrType = (ArrayType)type;
TypeNode elemType = this.VisitTypeReference(arrType.ElementType);
if (elemType == arrType.ElementType) return arrType;
if (elemType == null) { Debug.Fail(""); return null; }
this.TypesToBeDuplicated[arrType.UniqueKey] = arrType;
dup = elemType.GetArrayType(arrType.Rank, arrType.Sizes, arrType.LowerBounds);
break;
case NodeType.ClassParameter:
case NodeType.TypeParameter:
if (this.RecordOriginalAsTemplate) return type;
if (this.TypesToBeDuplicated[type.UniqueKey] == null) return type;
dup = this.VisitTypeNode(type);
break;
case NodeType.DelegateNode:
{
FunctionType ftype = type as FunctionType;
if (ftype == null) goto default;
dup = FunctionType.For(this.VisitTypeReference(ftype.ReturnType), this.VisitParameterList(ftype.Parameters), this.TargetType);
break;
}
case NodeType.Pointer:
Pointer pType = (Pointer)type;
elemType = this.VisitTypeReference(pType.ElementType);
if (elemType == pType.ElementType) return pType;
if (elemType == null) { Debug.Fail(""); return null; }
dup = elemType.GetPointerType();
break;
case NodeType.Reference:
Reference rType = (Reference)type;
elemType = this.VisitTypeReference(rType.ElementType);
if (elemType == rType.ElementType) return rType;
if (elemType == null) { Debug.Fail(""); return null; }
dup = elemType.GetReferenceType();
break;
//These types typically have only one reference and do not have pointer identity. Just duplicate them.
case NodeType.ArrayTypeExpression:
ArrayTypeExpression aExpr = (ArrayTypeExpression)type.Clone();
elemType = this.VisitTypeReference(aExpr.ElementType);
if (elemType == null) { Debug.Fail(""); return aExpr; }
aExpr.ElementType = elemType;
return aExpr;
case NodeType.BoxedTypeExpression:
BoxedTypeExpression bExpr = (BoxedTypeExpression)type.Clone();
bExpr.ElementType = this.VisitTypeReference(bExpr.ElementType);
return bExpr;
case NodeType.ClassExpression:
ClassExpression cExpr = (ClassExpression)type.Clone();
cExpr.Expression = this.VisitExpression(cExpr.Expression);
cExpr.TemplateArguments = this.VisitTypeReferenceList(cExpr.TemplateArguments);
return cExpr;
case NodeType.FlexArrayTypeExpression:
FlexArrayTypeExpression flExpr = (FlexArrayTypeExpression)type.Clone();
flExpr.ElementType = this.VisitTypeReference(flExpr.ElementType);
return flExpr;
case NodeType.FunctionPointer:
FunctionPointer funcPointer = (FunctionPointer)type.Clone();
funcPointer.ParameterTypes = this.VisitTypeReferenceList(funcPointer.ParameterTypes);
funcPointer.ReturnType = this.VisitTypeReference(funcPointer.ReturnType);
return funcPointer;
case NodeType.FunctionTypeExpression:
FunctionTypeExpression ftExpr = (FunctionTypeExpression)type.Clone();
ftExpr.Parameters = this.VisitParameterList(ftExpr.Parameters);
ftExpr.ReturnType = this.VisitTypeReference(ftExpr.ReturnType);
return ftExpr;
case NodeType.InvariantTypeExpression:
InvariantTypeExpression invExpr = (InvariantTypeExpression)type.Clone();
invExpr.ElementType = this.VisitTypeReference(invExpr.ElementType);
return invExpr;
case NodeType.InterfaceExpression:
InterfaceExpression iExpr = (InterfaceExpression)type.Clone();
iExpr.Expression = this.VisitExpression(iExpr.Expression);
iExpr.TemplateArguments = this.VisitTypeReferenceList(iExpr.TemplateArguments);
return iExpr;
case NodeType.NonEmptyStreamTypeExpression:
NonEmptyStreamTypeExpression neExpr = (NonEmptyStreamTypeExpression)type.Clone();
neExpr.ElementType = this.VisitTypeReference(neExpr.ElementType);
return neExpr;
case NodeType.NonNullTypeExpression:
NonNullTypeExpression nnExpr = (NonNullTypeExpression)type.Clone();
nnExpr.ElementType = this.VisitTypeReference(nnExpr.ElementType);
return nnExpr;
case NodeType.NonNullableTypeExpression:
NonNullableTypeExpression nbExpr = (NonNullableTypeExpression)type.Clone();
nbExpr.ElementType = this.VisitTypeReference(nbExpr.ElementType);
return nbExpr;
case NodeType.NullableTypeExpression:
NullableTypeExpression nuExpr = (NullableTypeExpression)type.Clone();
nuExpr.ElementType = this.VisitTypeReference(nuExpr.ElementType);
return nuExpr;
case NodeType.OptionalModifier:
TypeModifier modType = (TypeModifier)type;
TypeNode modified = this.VisitTypeReference(modType.ModifiedType);
TypeNode modifier = this.VisitTypeReference(modType.Modifier);
if (modified == null || modifier == null) { Debug.Fail(""); return null; }
return OptionalModifier.For(modifier, modified);
case NodeType.RequiredModifier:
modType = (TypeModifier)type;
modified = this.VisitTypeReference(modType.ModifiedType);
modifier = this.VisitTypeReference(modType.Modifier);
if (modified == null || modifier == null) { Debug.Fail(""); return null; }
return RequiredModifier.For(modifier, modified);
case NodeType.OptionalModifierTypeExpression:
OptionalModifierTypeExpression optmodType = (OptionalModifierTypeExpression)type.Clone();
optmodType.ModifiedType = this.VisitTypeReference(optmodType.ModifiedType);
optmodType.Modifier = this.VisitTypeReference(optmodType.Modifier);
return optmodType;
case NodeType.RequiredModifierTypeExpression:
RequiredModifierTypeExpression reqmodType = (RequiredModifierTypeExpression)type.Clone();
reqmodType.ModifiedType = this.VisitTypeReference(reqmodType.ModifiedType);
reqmodType.Modifier = this.VisitTypeReference(reqmodType.Modifier);
return reqmodType;
case NodeType.PointerTypeExpression:
PointerTypeExpression pExpr = (PointerTypeExpression)type.Clone();
elemType = this.VisitTypeReference(pExpr.ElementType);
if (elemType == null) { Debug.Fail(""); return pExpr; }
pExpr.ElementType = elemType;
return pExpr;
case NodeType.ReferenceTypeExpression:
ReferenceTypeExpression rExpr = (ReferenceTypeExpression)type.Clone();
elemType = this.VisitTypeReference(rExpr.ElementType);
if (elemType == null) { Debug.Fail(""); return rExpr; }
rExpr.ElementType = elemType;
return rExpr;
case NodeType.StreamTypeExpression:
StreamTypeExpression sExpr = (StreamTypeExpression)type.Clone();
sExpr.ElementType = this.VisitTypeReference(sExpr.ElementType);
return sExpr;
case NodeType.TupleTypeExpression:
TupleTypeExpression tuExpr = (TupleTypeExpression)type.Clone();
tuExpr.Domains = this.VisitFieldList(tuExpr.Domains);
return tuExpr;
case NodeType.TypeExpression:
TypeExpression tExpr = (TypeExpression)type.Clone();
tExpr.Expression = this.VisitExpression(tExpr.Expression);
tExpr.TemplateArguments = this.VisitTypeReferenceList(tExpr.TemplateArguments);
return tExpr;
case NodeType.TypeIntersectionExpression:
TypeIntersectionExpression tiExpr = (TypeIntersectionExpression)type.Clone();
tiExpr.Types = this.VisitTypeReferenceList(tiExpr.Types);
return tiExpr;
case NodeType.TypeUnionExpression:
TypeUnionExpression tyuExpr = (TypeUnionExpression)type.Clone();
tyuExpr.Types = this.VisitTypeReferenceList(tyuExpr.Types);
return tyuExpr;
default:
if (type.Template != null && type.Template != type && (type.TemplateArguments != null ||
(!this.RecordOriginalAsTemplate && type.ConsolidatedTemplateArguments != null && type.ConsolidatedTemplateArguments.Count > 0)))
{
TypeNode templ = this.VisitTypeReference(type.Template);
//^ assume templ != null;
if (TargetPlatform.UseGenerics)
{
if (templ.Template != null)
{
if (this.RecordOriginalAsTemplate)
templ = templ.Template;
else
templ = this.VisitTypeReference(templ.Template);
//^ assume templ != null;
}
if (type.DeclaringType != null)
{
TypeNode declType = this.VisitTypeReference(type.DeclaringType);
if (declType != null)
{
TypeNode templDup = declType.GetNestedType(templ.Name);
if (templDup == null)
{
//Can happen when templ is nested in a type that is still being duplicated
templDup = (TypeNode)templ.Clone();
templDup.DeclaringModule = this.TargetModule;
templDup.Template = templ;
declType.NestedTypes.Add(templDup);
templ = templDup;
}
else
{
templ = templDup;
if (templ.Template != null)
{
if (this.RecordOriginalAsTemplate)
templ = templ.Template;
else
{
if (templ.Template.DeclaringType == null)
templ.Template.DeclaringType = templ.DeclaringType.Template;
templ = this.VisitTypeReference(templ.Template);
}
//^ assume templ != null;
}
}
}
}
}
else
{
if (templ.Template != null) return type;
}
bool duplicateReference = templ != type.Template;
TypeNodeList targs = type.TemplateArguments == null ? new TypeNodeList() :
new TypeNodeList(type.TemplateArguments);
if(!this.RecordOriginalAsTemplate)
targs = type.ConsolidatedTemplateArguments == null ? new TypeNodeList() :
new TypeNodeList(type.ConsolidatedTemplateArguments);
for(int i = 0, n = targs == null ? 0 : targs.Count; i < n; i++)
{
TypeNode targ = targs[i];
if(targ == null)
continue;
// !EFW - Okay, this is a REALLY ugly hack but I couldn't think of any other way
// around it. If a type contains a nested type that itself implements a nested
// type from within the containing type (still with me?), this gets into an
// endless loop and eventually overflows the stack. As with the other case
// similar to this (Nodes.cs), I'm assuming 20 levels of recursion is enough of
// an indication that we've hit the problem. In this case, if it hits the
// maximum level, we'll just return the current type. This seems to work okay.
//
// The abbreviated example:
//
// public abstract partial class MyClass<TD, TT>
// {
// public interface IBase
// {
// NestedClass<T> RequestElementsTyped<T>();
// }
//
// public class NestedClass<T> : IEquatable<NestedClass<T>>
// {
// public bool Equals(NestedClass<T> other)
// {
// throw new NotImplementedException();
// }
// }
//
// public interface IAnother : IBase { }
//}
//
if(recursionCounter > 20)
return type;
recursionCounter++;
TypeNode targDup = this.VisitTypeReference(targ);
recursionCounter--;
if(targ != targDup)
duplicateReference = true;
targs[i] = targDup;
}
if(!duplicateReference)
return type;
if(!this.RecordOriginalAsTemplate)
dup = templ.GetGenericTemplateInstance(this.TargetModule, targs);
else
dup = templ.GetTemplateInstance(this.TargetModule, this.TargetType, type.DeclaringType, targs);
this.DuplicateFor[type.UniqueKey] = dup;
return dup;
}
if (this.TypesToBeDuplicated[type.UniqueKey] == null) return type;
TypeNode savedTargetType = this.TargetType;
TypeNode declaringType = this.VisitTypeReference(type.DeclaringType);
if (declaringType != null)
{
dup = (TypeNode)this.DuplicateFor[type.UniqueKey];
if (dup != null) return dup;
if (declaringType == type.DeclaringType)
{
//Trying to duplicate a nested type into a type that is not the duplicate of the declaring type.
//In this case, type is being duplicated into the original target type.
declaringType = this.OriginalTargetType;
}
}
this.TargetType = declaringType;
dup = (TypeNode)this.Visit(type);
this.TargetType = savedTargetType;
break;
}
this.DuplicateFor[type.UniqueKey] = dup;
return dup;
}
internal TypeNode VisitTypeNode(TypeNode type, Identifier mangledName, TypeNodeList templateArguments, TypeNode template, bool delayVisitToNestedTypes)
{
if (type == null) return null;
TypeNode dup = (TypeNode)this.DuplicateFor[type.UniqueKey];
if (dup != null) return dup;
this.DuplicateFor[type.UniqueKey] = dup = (TypeNode)type.Clone();
if (mangledName != null)
{
this.TargetModule.StructurallyEquivalentType[mangledName.UniqueIdKey] = dup;
dup.TemplateArguments = templateArguments;
}
dup.arrayTypes = null;
dup.constructors = null;
dup.consolidatedTemplateArguments = null;
dup.consolidatedTemplateParameters = null;
#if DEBUG
dup.DebugLabel = null;
#endif
dup.DocumentationId = null;
if (this.CopyDocumentation) dup.Documentation = type.Documentation;
dup.defaultMembers = null;
dup.explicitCoercionFromTable = null;
dup.explicitCoercionMethods = null;
dup.implicitCoercionFromTable = null;
dup.implicitCoercionMethods = null;
dup.implicitCoercionToTable = null;
dup.memberCount = 0;
dup.memberTable = null;
dup.modifierTable = null;
dup.NestedTypes = null;
dup.pointerType = null;
dup.ProviderHandle = null;
dup.ProvideTypeAttributes = null;
dup.ProvideTypeMembers = null;
dup.ProvideNestedTypes = null;
dup.referenceType = null;
dup.runtimeType = null;
dup.structurallyEquivalentMethod = null;
TypeParameter tp = dup as TypeParameter;
if (tp != null) tp.structuralElementTypes = null;
ClassParameter cp = dup as ClassParameter;
if (cp != null) cp.structuralElementTypes = null;
dup.szArrayTypes = null;
if (this.RecordOriginalAsTemplate) dup.Template = type;
dup.TemplateArguments = null;
dup.TemplateInstances = null;
dup.DeclaringModule = this.TargetModule;
dup.DeclaringType = this.TargetType;
TypeNode savedTargetType = this.TargetType;
this.TargetType = dup;
dup.Attributes = this.VisitAttributeList(type.Attributes);
dup.SecurityAttributes = this.VisitSecurityAttributeList(type.SecurityAttributes);
Class c = dup as Class;
if (c != null) c.BaseClass = (Class)this.VisitTypeReference(c.BaseClass);
dup.Interfaces = this.VisitInterfaceReferenceList(dup.Interfaces);
dup.TemplateParameters = this.VisitTypeReferenceList(type.TemplateParameters);
dup.consolidatedTemplateParameters = null;
if (dup is MethodScope)
dup.members = this.VisitMemberList(type.members);
else
if (!this.RecordOriginalAsTemplate)
{
if (!delayVisitToNestedTypes)
dup.nestedTypes = this.VisitNestedTypes(dup, type.NestedTypes);
dup.members = null;
dup.ProvideTypeMembers = new TypeNode.TypeMemberProvider(this.ProvideTypeMembers);
dup.ProviderHandle = type;
}
else
{
dup.members = null;
dup.ProvideNestedTypes = new TypeNode.NestedTypeProvider(this.ProvideNestedTypes);
dup.ProvideTypeMembers = new TypeNode.TypeMemberProvider(this.ProvideTypeMembers);
dup.ProviderHandle = type;
}
DelegateNode delegateNode = dup as DelegateNode;
if (delegateNode != null)
{
if (!delegateNode.IsNormalized || !this.RecordOriginalAsTemplate)
{
if (!delegateNode.IsNormalized)
((DelegateNode)type).ProvideMembers();
delegateNode.Parameters = this.VisitParameterList(delegateNode.Parameters);
delegateNode.ReturnType = this.VisitTypeReference(delegateNode.ReturnType);
}
else
{
delegateNode.Parameters = null;
delegateNode.ReturnType = null;
}
}
dup.membersBeingPopulated = false;
this.TargetType = savedTargetType;
return dup;
}