internal static IExtendedType ChangeNullability(
IExtendedType type,
ReadOnlySpan <bool?> nullable,
TypeCache cache)
{
if (nullable.Length == 0)
{
return(type);
}
ExtendedTypeId id = Tools.CreateId(type, nullable);
if (cache.TryGetType(id, out ExtendedType? extendedType))
{
return(extendedType);
}
var pos = 0;
return(ChangeNullability(id, (ExtendedType)type, nullable, ref pos, cache));
}
public bool Equals(ExtendedTypeId other) => Type == other.Type && Nullability == other.Nullability && Kind == other.Kind;
private static ExtendedType ChangeNullability(
ExtendedTypeId id,
ExtendedType type,
ReadOnlySpan <bool?> nullable,
ref int position,
TypeCache cache)
{
if (cache.TryGetType(id, out ExtendedType? cached))
{
return(cached);
}
var pos = position++;
var changeNullability =
nullable.Length > pos &&
nullable[pos].HasValue &&
nullable[pos] !.Value != type.IsNullable;
IReadOnlyList <ExtendedType> typeArguments = type.TypeArguments;
if (type.TypeArguments.Count > 0 && nullable.Length > position)
{
var args = new ExtendedType[type.TypeArguments.Count];
for (var j = 0; j < type.TypeArguments.Count; j++)
{
ExtendedType typeArgument = type.TypeArguments[j];
ExtendedTypeId typeArgumentId =
Tools.CreateId(typeArgument, nullable.Slice(position));
args[j] = nullable.Length > position
? ChangeNullability(
typeArgumentId,
typeArgument,
nullable,
ref position,
cache)
: type.TypeArguments[j];
}
typeArguments = args;
}
if (changeNullability || !ReferenceEquals(typeArguments, type.TypeArguments))
{
ExtendedType?elementType = type.IsArrayOrList
? type.ElementType
: null;
if (elementType is not null &&
!ReferenceEquals(typeArguments, type.TypeArguments))
{
for (var e = 0; e < type.TypeArguments.Count; e++)
{
if (ReferenceEquals(elementType, type.TypeArguments[e]))
{
elementType = typeArguments[e];
}
}
}
var rewritten = new ExtendedType(
type.Type,
type.Kind,
typeArguments: typeArguments,
source: type.Source,
definition: type.Definition,
elementType: elementType,
isList: type.IsList,
isNamedType: type.IsNamedType,
isNullable: nullable[pos] ?? type.IsNullable);
return(cache.TryAdd(rewritten)
? rewritten
: cache.GetType(rewritten.Id));
}
return(type);
}