clearing a stringstream

[Gary Wessle]

Hi

how can I clear a stringstream?
ss.clear();
or
ss.flush();

thanks

[s5n]

On Feb 23, 8:26 pm, Gary Wessle <[e-mail]:

Hi

how can I clear a stringstream?
ss.clear();
or
ss.flush();

For an ostringstream, try os.str("");

[Jacek Dziedzic]

Gary Wessle wrote:

Hi

how can I clear a stringstream?
ss.clear();
or
ss.flush();

Depends what you mean by 'clear'. To clear the state
(error flags, etc.) use ss.clear(). This does not clear
the contents of the stringstream, however. In particular,
if you are trying to read data from a stringstream and
fail because of some leftover characters, clear()ing the
stringstream only clears the error flags, leaving the
leftover characters still in the stringstream.

HTH,
- J.

[Gary Wessle]

Jacek Dziedzic <ja************************@gmail.comwrites:

Gary Wessle wrote:

Hi
how can I clear a stringstream?
ss.clear(); or ss.flush();

Depends what you mean by 'clear'. To clear the state
(error flags, etc.) use ss.clear(). This does not clear
the contents of the stringstream, however. In particular,
if you are trying to read data from a stringstream and
fail because of some leftover characters, clear()ing the
stringstream only clears the error flags, leaving the
leftover characters still in the stringstream.

yes, I want to clear the content of the stringstream and not the flag.
how can I do this?

[John Harrison]

Gary Wessle wrote:

Jacek Dziedzic <ja************************@gmail.comwrites:

>>Gary Wessle wrote:

>>>Hi
how can I clear a stringstream?
ss.clear(); or ss.flush();

Depends what you mean by 'clear'. To clear the state
(error flags, etc.) use ss.clear(). This does not clear
the contents of the stringstream, however. In particular,
if you are trying to read data from a stringstream and
fail because of some leftover characters, clear()ing the
stringstream only clears the error flags, leaving the
leftover characters still in the stringstream.

yes, I want to clear the content of the stringstream and not the flag.
how can I do this?

ss.str("");

But I think it's generally better to start with a new stringstream
rather than try to reuse an old one.

Why not post some code?

john

[Victor Bazarov]

Gary Wessle wrote:

Jacek Dziedzic <ja************************@gmail.comwrites:

>Gary Wessle wrote:

>>Hi
how can I clear a stringstream?
ss.clear(); or ss.flush();

Depends what you mean by 'clear'. To clear the state
(error flags, etc.) use ss.clear(). This does not clear
the contents of the stringstream, however. In particular,
if you are trying to read data from a stringstream and
fail because of some leftover characters, clear()ing the
stringstream only clears the error flags, leaving the
leftover characters still in the stringstream.

yes, I want to clear the content of the stringstream and not the flag.
how can I do this?

You've been already told: ss.str("")

Don't you have TFM you can R?

V
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