Hi, I am writing tests with streams, and I noticed that a stream opened on a string doesn't close, but FileStreams do close. Is it normal ? -- Jérémie Regnault
On 29 Jun 2017, at 16:07, Jérémie Regnault <jeremie.regnault@outlook.com> wrote:
Hi,
I am writing tests with streams, and I noticed that a stream opened on a string doesn't close, but FileStreams do close. Is it normal ?
How do you mean that ? That FileStreams close automatically ? That is indeed the case, that they are closed as a finalization action (i.e. when they become garbage), but that I consider that a fail safe thing, not something you should rely on. They should be properly closed, like #readStreamDo: and #writeStreamDo: do. Streams over collections such as Strings do not need closing, as there is no opening either. But general stream code better does.
-- Jérémie Regnault
In fact the question comes from the fact that they are not polymorphic and you should know if you're manipulating a closable stream or not... Maybe a solution is indeed to use #writeStreamDo:, that should behave well even for in-memory, collection streams, no? On Thu, Jun 29, 2017 at 4:58 PM, Sven Van Caekenberghe <sven@stfx.eu> wrote:
On 29 Jun 2017, at 16:07, Jérémie Regnault <jeremie.regnault@outlook.com> wrote:
Hi,
I am writing tests with streams, and I noticed that a stream opened on a string doesn't close, but FileStreams do close. Is it normal ?
How do you mean that ? That FileStreams close automatically ?
That is indeed the case, that they are closed as a finalization action (i.e. when they become garbage), but that I consider that a fail safe thing, not something you should rely on. They should be properly closed, like #readStreamDo: and #writeStreamDo: do.
Streams over collections such as Strings do not need closing, as there is no opening either. But general stream code better does.
-- Jérémie Regnault
-- Guille Polito Research Engineer French National Center for Scientific Research - *http://www.cnrs.fr* <http://www.cnrs.fr> *Web:* *http://guillep.github.io* <http://guillep.github.io> *Phone: *+33 06 52 70 66 13
participants (3)
-
Guillermo Polito -
Jérémie Regnault -
Sven Van Caekenberghe