Re: [boost] Re: I/O library status
Daryle, On Thursday 05 June 2003 01:28, Daryle Walker wrote: Actually, that reason isn't accurate. The '\n' is an expression of type char, and all output streams can print a char object with operator , even if the stream's character type isn't char. (The stream will secretly call the widen member function.) Yep, you are right. This will tell me to stop talking about io issues from memory ;-). Thomas -- Dipl.-Ing. Thomas Witt Institut fuer Verkehrswesen, Eisenbahnbau und -betrieb, Universitaet Hannover voice: +49(0) 511 762 - 4273, fax: +49(0) 511 762-3001 http://www.ive.uni-hannover.de ___ Unsubscribe other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
RE: [boost] Re: I/O library status
I agree with these conclusions and strongly support the addition of newl.
Paul
Paul A Bristow, Prizet Farmhouse, Kendal, Cumbria, LA8 8AB UK
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| -Original Message-
| From: [EMAIL PROTECTED]
| [mailto:[EMAIL PROTECTED] Behalf Of Thomas Witt
| Sent: Tuesday, June 03, 2003 8:19 AM
| To: Boost mailing list
| Subject: Re: [boost] Re: I/O library status
|
|
|
| Hi,
|
| On Monday 02 June 2003 19:21, Ed Brey wrote:
| * newl differs from '\n' only in that newl doesn't perform background
| formatting. Presumably one would choose to use newl to avoid the
| formatting. What is undesirable about '\n' being formatted?
|
| To me there are basically two reasons that make newl desirable beside the
| formatting issue.
|
| 1. std::endl was and is still abused heavily. I think there is a reason for
| this. Most c++ programmers are taught to stay clear of ugly low-level c
| things and to use the new shiny c++ facilities instead. And that's what they
| do, replace '\n' with std::endl. Personally I believe this reason alone
| justifies a std library extension std::newl.
|
| 2. IIUC the difference between a character and a manipulator is that the
| manipulator is not tied to the streams character type. So for some
| applications '\n' does not suffice. To me stream.widen('\n') is sufficiently
| ugly to justify a newl modifier.
|
| Thomas
|
| --
| Dipl.-Ing. Thomas Witt
| Institut fuer Verkehrswesen, Eisenbahnbau und -betrieb, Universitaet Hannover
| voice: +49(0) 511 762 - 4273, fax: +49(0) 511 762-3001
| http://www.ive.uni-hannover.de
|
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Re: [boost] Re: I/O library status
Hi,
On Monday 02 June 2003 19:21, Ed Brey wrote:
* newl differs from '\n' only in that newl doesn't perform background
formatting. Presumably one would choose to use newl to avoid the
formatting. What is undesirable about '\n' being formatted?
To me there are basically two reasons that make newl desirable beside the
formatting issue.
1. std::endl was and is still abused heavily. I think there is a reason for
this. Most c++ programmers are taught to stay clear of ugly low-level c
things and to use the new shiny c++ facilities instead. And that's what they
do, replace '\n' with std::endl. Personally I believe this reason alone
justifies a std library extension std::newl.
2. IIUC the difference between a character and a manipulator is that the
manipulator is not tied to the streams character type. So for some
applications '\n' does not suffice. To me stream.widen('\n') is sufficiently
ugly to justify a newl modifier.
Thomas
--
Dipl.-Ing. Thomas Witt
Institut fuer Verkehrswesen, Eisenbahnbau und -betrieb, Universitaet Hannover
voice: +49(0) 511 762 - 4273, fax: +49(0) 511 762-3001
http://www.ive.uni-hannover.de
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