public virtual AliasDefinition GetAliasDefinitionForRoot(Expression qualOrId, NamespaceScope nsscope){
if (nsscope == null) return null;
if (qualOrId == null){Debug.Assert(false); return null;}
QualifiedIdentifier qual = qualOrId as QualifiedIdentifier;
if (qual != null) return this.GetAliasDefinitionForRoot(qual.Qualifier, nsscope);
Identifier id = qualOrId as Identifier;
if (id == null){Debug.Assert(false); return null;}
NamespaceScope outerScope = nsscope.OuterScope as NamespaceScope;
if (id.Prefix != null){
AliasDefinition aliasDef = nsscope.GetAliasFor(id.Prefix);
if (aliasDef != null && aliasDef.AliasedAssemblies != null) return aliasDef;
if (outerScope == null) return null;
return outerScope.GetAliasFor(id.Prefix);
}else{
AliasDefinition aliasDef = nsscope.GetAliasFor(id);
if (aliasDef != null && aliasDef.AliasedAssemblies != null) return aliasDef;
if (outerScope == null) return null;
return outerScope.GetAliasFor(id);
}
}
public virtual Node LookupTypeOrNamespace(Identifier identifier, bool typeOnly, NamespaceScope nsScope, out TypeNodeList duplicates){
duplicates = null;
if (identifier == null || nsScope == null){Debug.Assert(false); return null;}
TypeNode t = nsScope.GetType(identifier, out duplicates, true);
if (t != null && t.Name != null && t.Name.UniqueIdKey == identifier.UniqueIdKey){
AliasDefinition aliasDef = nsScope.GetConflictingAlias(identifier);
if (aliasDef != null) aliasDef.ConflictingType = t;
}else if (!typeOnly){
TrivialHashtable alreadySeenAliases = new TrivialHashtable();
AliasDefinition aliasDef = nsScope.GetAliasFor(identifier);
while (aliasDef != null){
if (aliasDef.AliasedType != null) return (TypeNode)aliasDef.AliasedType;
if (alreadySeenAliases[aliasDef.UniqueKey] != null) break; //TODO: error?
alreadySeenAliases[aliasDef.UniqueKey] = aliasDef;
if (aliasDef.AliasedAssemblies != null) return aliasDef;
if (aliasDef.AliasedExpression is Identifier)
aliasDef = nsScope.GetAliasFor(identifier = (Identifier)aliasDef.AliasedExpression);
else if (aliasDef.AliasedExpression is QualifiedIdentifier)
return this.LookupTypeOrNamespace(aliasDef.AliasedExpression, false);
else
aliasDef = null;
}
Identifier ns = nsScope.GetNamespaceFullNameFor(identifier);
if (ns != null) return ns;
}
return t;
}
public virtual void ExpandRootIfAnAlias(ref Expression qualOrId, NamespaceScope nsscope){
if (nsscope == null) return;
if (qualOrId == null){Debug.Assert(false); return;}
QualifiedIdentifier qual = qualOrId as QualifiedIdentifier;
if (qual != null){this.ExpandRootIfAnAlias(ref qual.Qualifier, nsscope); return;}
Identifier id = qualOrId as Identifier;
if (id == null) return;
NamespaceScope outerScope = nsscope.OuterScope as NamespaceScope;
if (id.Prefix != null){
AliasDefinition aliasDef = nsscope.GetAliasFor(id.Prefix);
if (aliasDef != null && aliasDef.AliasedAssemblies != null){
//TODO: pass it back up to the caller
return;
}
if (outerScope == null) return;
aliasDef = outerScope.GetAliasFor(id.Prefix);
if (aliasDef != null){
qualOrId = new QualifiedIdentifier(aliasDef.AliasedExpression, this.GetUnprefixedIdentifier(id), id.SourceContext);
return;
}
}else{
AliasDefinition aliasDef = nsscope.GetAliasFor(id);
if (aliasDef != null && aliasDef.AliasedAssemblies != null){
//TODO: pass it back up to the caller
return;
}
if (outerScope == null) return;
aliasDef = outerScope.GetAliasFor(id);
if (aliasDef != null){
qualOrId = aliasDef.AliasedExpression;
return;
}
}
}