bool __ArraySupportsBizarreInterface(DmdType arrayType, DmdType @interface)
{
if (arrayType.__GetInternalCorElementType() != DDN.ElementType.SZArray)
{
return(false);
}
if (!__IsImplicitInterfaceOfSZArray(@interface))
{
return(false);
}
return(__CanCastParam(arrayType.GetElementType(), @interface.GetGenericArguments()[0]));
}
__CastResult __TypeDesc_CanCastToNoGC(DmdType toType)
{
Debug.Assert(this != toType);
if (IsGenericParameter)
{
if (toType == AppDomain.System_Object)
{
return(__CastResult.CanCast);
}
if (toType == AppDomain.System_ValueType)
{
return(__CastResult.MaybeCast);
}
foreach (var constraint in GetGenericParameterConstraints())
{
if (constraint.__CanCastToNoGC(toType) == __CastResult.CanCast)
{
return(__CastResult.CanCast);
}
}
return(__CastResult.MaybeCast);
}
if (!toType.__IsTypeDesc())
{
if (!IsArray)
{
return(__CastResult.CannotCast);
}
return(__CanCastToClassOrInterfaceNoGC(toType));
}
var toKind = toType.__GetInternalCorElementType();
var fromKind = __GetInternalCorElementType();
if (!(toKind == fromKind || (toKind == DDN.ElementType.Array && fromKind == DDN.ElementType.SZArray)))
{
return(__CastResult.CannotCast);
}
switch (toKind)
{
case DDN.ElementType.Array:
if (GetArrayRank() != toType.GetArrayRank())
{
return(__CastResult.CannotCast);
}
goto case DDN.ElementType.SZArray;
case DDN.ElementType.SZArray:
case DDN.ElementType.ByRef:
case DDN.ElementType.Ptr:
return(__CanCastParamNoGC(GetElementType(), toType.GetElementType()));
case DDN.ElementType.Var:
case DDN.ElementType.MVar:
case DDN.ElementType.FnPtr:
return(__CastResult.CannotCast);
default:
return(__CastResult.CanCast);
}
}
bool __TypeDesc_CanCastTo(DmdType toType)
{
if (this == toType)
{
return(true);
}
if (IsGenericParameter)
{
if (toType == AppDomain.System_Object)
{
return(true);
}
if (toType == AppDomain.System_ValueType)
{
if ((GenericParameterAttributes & DmdGenericParameterAttributes.NotNullableValueTypeConstraint) != 0)
{
return(true);
}
}
foreach (var constraint in GetGenericParameterConstraints())
{
if (constraint.__CanCastTo(toType))
{
return(true);
}
}
return(false);
}
if (!toType.__IsTypeDesc())
{
if (!IsArray)
{
return(false);
}
if (__CanCastToClassOrInterface(toType))
{
return(true);
}
if (toType.IsInterface)
{
if (__ArraySupportsBizarreInterface(this, toType))
{
return(true);
}
}
return(false);
}
var toKind = toType.__GetInternalCorElementType();
var fromKind = __GetInternalCorElementType();
if (!(toKind == fromKind || (toKind == DDN.ElementType.Array && fromKind == DDN.ElementType.SZArray)))
{
return(false);
}
switch (toKind)
{
case DDN.ElementType.Array:
if (GetArrayRank() != toType.GetArrayRank())
{
return(false);
}
goto case DDN.ElementType.SZArray;
case DDN.ElementType.SZArray:
case DDN.ElementType.ByRef:
case DDN.ElementType.Ptr:
return(__CanCastParam(GetElementType(), toType.GetElementType()));
case DDN.ElementType.Var:
case DDN.ElementType.MVar:
case DDN.ElementType.FnPtr:
return(false);
default:
return(true);
}
}
