 |
C++Talk.NET
C++ language newsgroups
|
| View previous topic :: View next topic |
| Author |
Message |
Prateek R Karandikar
Guest
|
 Posted: Wed May 19, 2004 8:18 pm Post subject: Why isn't the nonspecialized numeric_limits empty? |
 |
|
Why isn't nonspecialized numeric_limits empty? All its members ( of
the nonspecialized class) are meaningless anyway. The nonspecialized
char_traits is empty. Why not numeric_limits? Or both (char_traits and
numeric_limits) could have declared and not defined :
template<typename T> struct numeric_limits;
template<> struct numeric_limits<bool> {/*...*/};
/*...*/
Why do the numeric_limits specializations for integral types also have
members relevant only to only floating-point types? It seems wierd to
talk about numeric_limits<int>::round_error.
---
[ comp.std.c++ is moderated. To submit articles, try just posting with ]
[ your news-reader. If that fails, use mailto:std-c++@ncar.ucar.edu ]
[ --- Please see the FAQ before posting. --- ]
[ FAQ: http://www.jamesd.demon.co.uk/csc/faq.html ]
|
|
| Back to top |
|
 |
Prateek R Karandikar
Guest
|
| Posted: Sat Jun 12, 2004 6:21 pm Post subject: Re: Why isn't the nonspecialized numeric_limits empty? |
|
|
Anything wrong in it being empty?
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
To iterate is human, to recurse divine.
-L. Peter Deutsch
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
---
[ comp.std.c++ is moderated. To submit articles, try just posting with ]
[ your news-reader. If that fails, use mailto:std-c++@ncar.ucar.edu ]
[ --- Please see the FAQ before posting. --- ]
[ FAQ: http://www.jamesd.demon.co.uk/csc/faq.html ]
|
|
| Back to top |
|
|
Terje Sletteb?
Guest
|
| Posted: Sun Jun 13, 2004 8:36 pm Post subject: Re: Why isn't the nonspecialized numeric_limits empty? |
|
|
[email]kprateek88 (AT) yahoo (DOT) com[/email] (Prateek R Karandikar) wrote in message news:<607f883e.0406120927.2a4bd460 (AT) posting (DOT) google.com>...
| Quote: | Anything wrong in it being empty?
|
std::numeric_limts has a lot of problems, also, besides this, such as
min/max not being integral constant expressions (althought Boost has a
component that fixes this:
[url]http://www.boost.org/libs/integer/integer_traits.html)[/url]. See e.g.:
http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-active.html#201
"[post-Toronto: The opinion of the LWG is that the wording in the
standard, as well as the wording of the proposed resolution, is
flawed. The term "arithmetic types" is well defined in C and C++, and
it is not clear that the term is being used correctly. It is also not
clear that the term "implementation dependent" has any useful meaning
in this context. The biggest problem is that numeric_limits seems to
be intended both for built-in types and for user-defined types, and
the standard doesn't make it clear how numeric_limits applies to each
of those cases. A wholesale review of numeric_limits is needed. A
paper would be welcome.]"
as well as:
http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-defects.html#184 (bool
is neither signed nor unsigned)
There was also a thread about numeric_limits a few years ago
([url]http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&selm=73611vs31id2ejf4qjpbpatcml4jadgluc%404ax.com)[/url].
Regards,
Terje
---
[ comp.std.c++ is moderated. To submit articles, try just posting with ]
[ your news-reader. If that fails, use mailto:std-c++@ncar.ucar.edu ]
[ --- Please see the FAQ before posting. --- ]
[ FAQ: http://www.jamesd.demon.co.uk/csc/faq.html ]
|
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
|
|
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
