public ValueGetter <TValue> GetGetterCore <TValue>(int col, Action checkIsGood)
{
bool isSrc;
int index = _parent._schema.MapColumnIndex(out isSrc, col);
if (isSrc)
{
return(_input.GetGetter <TValue>(index));
}
var appendedGetter = _appendedRow.GetGetter <TValue>(index);
return
((ref TValue value) =>
{
checkIsGood?.Invoke();
if (_lastServedPosition != _input.Position)
{
_input.FillValues(_src);
// REVIEW: what if this throws? Maybe swallow the exception?
_parent._mapAction(_src, _dst);
_lastServedPosition = _input.Position;
}
appendedGetter(ref value);
});
}
