private static MemberDataBase FindEquivalentMemberInClassHierarchy(MemberDataBase oldMember, DeclaringTypeData newType, AssemblyFamily newAssemblyFamily)
{
var allowMatchOnNameOnly = true;
var current = newType;
while (current != null)
{
var newMember = MetadataComparer.FindEquivalentMember(oldMember, current, newAssemblyFamily, allowMatchOnNameOnly);
if (newMember != null)
{
return(newMember);
}
current = current.BaseType;
allowMatchOnNameOnly = false;
}
return(null);
}
private static List <BreakingChangeBase> CompareTypes(TypeData oldTypeBase, TypeData newTypeBase, AssemblyFamily newAssemblyFamily)
{
var oldType = (TypeDefinitionData)oldTypeBase;
var newType = (TypeDefinitionData)newTypeBase;
var breakingChanges = MetadataComparer.CompareItems(oldType, newType, newAssemblyFamily);
if (oldType.GenericParameters.Count == newType.GenericParameters.Count)
{
for (int i = 0; i < oldType.GenericParameters.Count; i++)
{
breakingChanges.AddRange(MetadataComparer.CompareGenericTypeParameters(oldType.GenericParameters[i], newType.GenericParameters[i], newAssemblyFamily));
}
}
var hasExternallyVisibleConstructor = oldType.GetMembers(".ctor").Count != 0;
if (oldType.TypeKind != TypeKind.Delegate)
{
foreach (var oldMember in oldType.GetMembers())
{
MemberDataBase newMember;
if (oldType.TypeKind == TypeKind.Class && oldMember.IsOverride == false)
{
newMember = MetadataComparer.FindEquivalentMemberInClassHierarchy(oldMember, newType, newAssemblyFamily);
}
else
{
newMember = MetadataComparer.FindEquivalentMember(oldMember, newType, newAssemblyFamily);
}
if (newMember != null)
{
breakingChanges.AddRange(MetadataComparer.CompareMembers(oldMember, newMember, newAssemblyFamily));
continue;
}
if (MetadataComparer.IsMemberKindChangeAllowed(oldMember, newType, newAssemblyFamily))
{
continue;
}
if (oldMember.IsOverride)
{
if (hasExternallyVisibleConstructor)
{
var baseMember = oldMember.GetBaseMember();
if (baseMember.IsAbstract)
{
breakingChanges.Add(new RemovedOverrideOfAbstractMember(oldMember, newType));
}
}
continue;
}
breakingChanges.Add(new RemovedMember(oldMember, newType));
}
}
switch (oldType.TypeKind)
{
case TypeKind.Class:
foreach (var newMember in newType.GetMembers())
{
if (newMember.IsAbstract)
{
var oldMember = MetadataComparer.FindEquivalentMemberInClassHierarchy(newMember, oldType, newAssemblyFamily);
if (oldMember == null)
{
breakingChanges.Add(new AddedAbstractMember(newMember));
}
}
else if (newType.IsSealed == false && newMember.IsSealed && newMember.IsOverride)
{
// If the class contains a sealed override member, find the original equivalent member and see if derived
// classes would have been able to override the member previously.
var oldMember = MetadataComparer.FindEquivalentMemberInClassHierarchy(newMember, oldType, newAssemblyFamily);
if (oldMember != null && oldMember.CanBeOverridden)
{
breakingChanges.Add(new SealedMember(oldMember, newMember));
}
}
}
break;
case TypeKind.Interface:
foreach (var newMember in newType.GetMembers())
{
var oldMember = MetadataComparer.FindEquivalentMember(newMember, oldType, newAssemblyFamily);
if (oldMember == null)
{
breakingChanges.Add(new AddedInterfaceMember(newMember));
}
}
break;
case TypeKind.Delegate:
MetadataComparer.CompareParameters(oldType, newType, newAssemblyFamily, breakingChanges);
break;
}
return(breakingChanges);
}
