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Groups > comp.lang.c++ > #7715 > unrolled thread
| Started by | eric <cneric12lin0@gmail.com> |
|---|---|
| First post | 2011-07-10 23:32 -0700 |
| Last post | 2011-07-11 20:54 +1200 |
| Articles | 4 — 3 participants |
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in g++(invalid use of incomplete type) eric <cneric12lin0@gmail.com> - 2011-07-10 23:32 -0700
Re: in g++(invalid use of incomplete type) eric <cneric12lin0@gmail.com> - 2011-07-11 00:31 -0700
Re: in g++(invalid use of incomplete type) Michael DOUBEZ <michael.doubez@free.fr> - 2011-07-11 01:54 -0700
Re: in g++(invalid use of incomplete type) Ian Collins <ian-news@hotmail.com> - 2011-07-11 20:54 +1200
| From | eric <cneric12lin0@gmail.com> |
|---|---|
| Date | 2011-07-10 23:32 -0700 |
| Subject | in g++(invalid use of incomplete type) |
| Message-ID | <e56f2431-3294-45f1-a5c5-7c0cf172fd96@k19g2000prn.googlegroups.com> |
Dear c++ programers:
If you are also an g++ programers, especially ever create/modify its
source code, I need your help
I have a piece simple code about formatting a date/time as a string
from a book. its authors claim it work in vc++7.1 on xp.
but my g++4.5.2 didn't pass it on compile stage
-------------------------------------------------------------------------------------------
eric@eric-laptop:~/cppcookbook/ch5$ g++ Example5-4.cpp
Example5-4.cpp: In function ‘std::ostream&
formatDatetime(std::ostream&, const tm&, const char*)’:
Example5-4.cpp:16:17: error: invalid use of incomplete type ‘const
struct std::time_put<char>’
/usr/local/lib/gcc/i686-pc-linux-gnu/4.5.2/../../../../include/c++/
4.5.2/bits/localefwd.h:163:11: error: declaration of ‘const struct
std::time_put<char>’
Example5-4.cpp: In function ‘std::string dateTimeToString(const tm&,
const char*)’:
Example5-4.cpp:24:31: error: ‘formatDateTime’ was not declared in this
scope
In file included from /usr/local/lib/gcc/i686-pc-linux-gnu/
4.5.2/../../../../include/c++/4.5.2/bits/locale_classes.h:815:0,
from /usr/local/lib/gcc/i686-pc-linux-gnu/
4.5.2/../../../../include/c++/4.5.2/bits/ios_base.h:43,
from /usr/local/lib/gcc/i686-pc-linux-gnu/
4.5.2/../../../../include/c++/4.5.2/ios:43,
from /usr/local/lib/gcc/i686-pc-linux-gnu/
4.5.2/../../../../include/c++/4.5.2/ostream:40,
from /usr/local/lib/gcc/i686-pc-linux-gnu/
4.5.2/../../../../include/c++/4.5.2/iostream:40,
from Example5-4.cpp:2:
/usr/local/lib/gcc/i686-pc-linux-gnu/4.5.2/../../../../include/c++/
4.5.2/bits/locale_classes.tcc: In function ‘const _Facet&
std::use_facet(const std::locale&) [with _Facet =
std::time_put<char>]’:
Example5-4.cpp:14:77: instantiated from here
/usr/local/lib/gcc/i686-pc-linux-gnu/4.5.2/../../../../include/c++/
4.5.2/bits/locale_classes.tcc:107:43: error: incomplete type
‘std::time_put<char>’ used in nested name specifier
/usr/local/lib/gcc/i686-pc-linux-gnu/4.5.2/../../../../include/c++/
4.5.2/bits/locale_classes.tcc:112:56: error: cannot dynamic_cast ‘*
*(__facets + ((unsigned int)(((unsigned int)__i) * 4u)))’ (of type
‘const class std::locale::facet’) to type ‘const struct
std::time_put<char>&’ (target is not pointer or reference to complete
type)
eric@eric-laptop:~/cppcookbook/ch5$
------------------------------------------------------------------------------------------------------------------------------------------------------
I welcome anyone can leading me to modify the source code as well as
any short method to get around it.
thanks a lot in advance
Eric
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| From | eric <cneric12lin0@gmail.com> |
|---|---|
| Date | 2011-07-11 00:31 -0700 |
| Message-ID | <9216c5aa-78f7-43cd-9957-dea63f1b5a84@34g2000pru.googlegroups.com> |
| In reply to | #7715 |
On Jul 10, 11:32 pm, eric <cneric12l...@gmail.com> wrote:
> Dear c++ programers:
>
> If you are also an g++ programers, especially ever create/modify its
> source code, I need your help
> I have a piece simple code about formatting a date/time as a string
> from a book. its authors claim it work in vc++7.1 on xp.
> but my g++4.5.2 didn't pass it on compile stage
> -------------------------------------------------------------------------------------------
> eric@eric-laptop:~/cppcookbook/ch5$ g++ Example5-4.cpp
> Example5-4.cpp: In function ‘std::ostream&
> formatDatetime(std::ostream&, const tm&, const char*)’:
> Example5-4.cpp:16:17: error: invalid use of incomplete type ‘const
> struct std::time_put<char>’
> /usr/local/lib/gcc/i686-pc-linux-gnu/4.5.2/../../../../include/c++/
> 4.5.2/bits/localefwd.h:163:11: error: declaration of ‘const struct
> std::time_put<char>’
> Example5-4.cpp: In function ‘std::string dateTimeToString(const tm&,
> const char*)’:
> Example5-4.cpp:24:31: error: ‘formatDateTime’ was not declared in this
> scope
> In file included from /usr/local/lib/gcc/i686-pc-linux-gnu/
> 4.5.2/../../../../include/c++/4.5.2/bits/locale_classes.h:815:0,
> from /usr/local/lib/gcc/i686-pc-linux-gnu/
> 4.5.2/../../../../include/c++/4.5.2/bits/ios_base.h:43,
> from /usr/local/lib/gcc/i686-pc-linux-gnu/
> 4.5.2/../../../../include/c++/4.5.2/ios:43,
> from /usr/local/lib/gcc/i686-pc-linux-gnu/
> 4.5.2/../../../../include/c++/4.5.2/ostream:40,
> from /usr/local/lib/gcc/i686-pc-linux-gnu/
> 4.5.2/../../../../include/c++/4.5.2/iostream:40,
> from Example5-4.cpp:2:
> /usr/local/lib/gcc/i686-pc-linux-gnu/4.5.2/../../../../include/c++/
> 4.5.2/bits/locale_classes.tcc: In function ‘const _Facet&
> std::use_facet(const std::locale&) [with _Facet =
> std::time_put<char>]’:
> Example5-4.cpp:14:77: instantiated from here
> /usr/local/lib/gcc/i686-pc-linux-gnu/4.5.2/../../../../include/c++/
> 4.5.2/bits/locale_classes.tcc:107:43: error: incomplete type
> ‘std::time_put<char>’ used in nested name specifier
> /usr/local/lib/gcc/i686-pc-linux-gnu/4.5.2/../../../../include/c++/
> 4.5.2/bits/locale_classes.tcc:112:56: error: cannot dynamic_cast ‘*
> *(__facets + ((unsigned int)(((unsigned int)__i) * 4u)))’ (of type
> ‘const class std::locale::facet’) to type ‘const struct
> std::time_put<char>&’ (target is not pointer or reference to complete
> type)
> eric@eric-laptop:~/cppcookbook/ch5$
> ------------------------------------------------------------------------------------------------------------------------------------------------------
> I welcome anyone can leading me to modify the source code as well as
> any short method to get around it.
> thanks a lot in advance
> Eric
-----------------------------------------------------the program I
used to compile is-----------------------
// Example 5-4 formatting a datetime string
#include <iostream>
#include <cstdlib>
#include <ctime>
#include <cstring>
#include <string>
#include <stdexcept>
#include <iterator>
#include <sstream>
using namespace std;
ostream& formatDatetime(ostream& out, const tm& t, const char* fmt) {
const time_put<char>& dateWriter = use_facet<time_put<char>
>(out.getloc());
int n = strlen(fmt);
if (dateWriter.put(out, out, ' ', &t, fmt, fmt + n).failed()) {
throw runtime_error("failure to format date time");
}
return out;
}
string dateTimeToString(const tm& t, const char* format) {
stringstream s;
formatDateTime(s, t, format);
return s.str();
}
tm now() {
time_t now = time(0);
return *localtime(&now);
}
int main()
{
try {
string s=dateTimeToString(now(), "%A %B, %d %Y %I:%M%p");
cout << s << endl;
s=dateTimeToString(now(), "%Y-%m-%d %H:%M:%S");
cout << s << endl;
}
catch(...) {
cerr << "failed to format date time" << endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
--------------------------------------------------------------
or you can get from its download site
http://examples.oreilly.com/9780596007614/
5-4.cpp
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| From | Michael DOUBEZ <michael.doubez@free.fr> |
|---|---|
| Date | 2011-07-11 01:54 -0700 |
| Message-ID | <13a34610-cf63-45a5-a952-8bc0fa50e295@hd10g2000vbb.googlegroups.com> |
| In reply to | #7722 |
On Jul 11, 9:31 am, eric <cneric12l...@gmail.com> wrote: > On Jul 10, 11:32 pm, eric <cneric12l...@gmail.com> wrote: [snip] > > I have a piece simple code about formatting a date/time as a string > > from a book. its authors claim it work in vc++7.1 on xp. > > but my g++4.5.2 didn't pass it on compile stage > > ------------------------------------------------------------------------------------------- > > eric@eric-laptop:~/cppcookbook/ch5$ g++ Example5-4.cpp > > Example5-4.cpp: In function ‘std::ostream& > > formatDatetime(std::ostream&, const tm&, const char*)’: > > Example5-4.cpp:16:17: error: invalid use of incomplete type ‘const > > struct std::time_put<char>’ > > /usr/local/lib/gcc/i686-pc-linux-gnu/4.5.2/../../../../include/c++/ > > 4.5.2/bits/localefwd.h:163:11: error: declaration of ‘const struct > > std::time_put<char>’ > > Example5-4.cpp: In function ‘std::string dateTimeToString(const tm&, > > const char*)’: > > Example5-4.cpp:24:31: error: ‘formatDateTime’ was not declared in this > > scope > > In file included from /usr/local/lib/gcc/i686-pc-linux-gnu/ > > 4.5.2/../../../../include/c++/4.5.2/bits/locale_classes.h:815:0, > > from /usr/local/lib/gcc/i686-pc-linux-gnu/ > > 4.5.2/../../../../include/c++/4.5.2/bits/ios_base.h:43, > > from /usr/local/lib/gcc/i686-pc-linux-gnu/ > > 4.5.2/../../../../include/c++/4.5.2/ios:43, > > from /usr/local/lib/gcc/i686-pc-linux-gnu/ > > 4.5.2/../../../../include/c++/4.5.2/ostream:40, > > from /usr/local/lib/gcc/i686-pc-linux-gnu/ > > 4.5.2/../../../../include/c++/4.5.2/iostream:40, > > from Example5-4.cpp:2: > > /usr/local/lib/gcc/i686-pc-linux-gnu/4.5.2/../../../../include/c++/ > > 4.5.2/bits/locale_classes.tcc: In function ‘const _Facet& > > std::use_facet(const std::locale&) [with _Facet = > > std::time_put<char>]’: > > Example5-4.cpp:14:77: instantiated from here > > /usr/local/lib/gcc/i686-pc-linux-gnu/4.5.2/../../../../include/c++/ > > 4.5.2/bits/locale_classes.tcc:107:43: error: incomplete type > > ‘std::time_put<char>’ used in nested name specifier > > /usr/local/lib/gcc/i686-pc-linux-gnu/4.5.2/../../../../include/c++/ > > 4.5.2/bits/locale_classes.tcc:112:56: error: cannot dynamic_cast ‘* > > *(__facets + ((unsigned int)(((unsigned int)__i) * 4u)))’ (of type > > ‘const class std::locale::facet’) to type ‘const struct > > std::time_put<char>&’ (target is not pointer or reference to complete > > type) > > eric@eric-laptop:~/cppcookbook/ch5$ > > ------------------------------------------------------------------------------------------------------------------------------------------------------ > > I welcome anyone can leading me to modify the source code as well as > > any short method to get around it. [...] > #include <cstdlib> > #include <ctime> > #include <cstring> > #include <string> > #include <stdexcept> > #include <iterator> > #include <sstream> #include <locale> -- Michael
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| From | Ian Collins <ian-news@hotmail.com> |
|---|---|
| Date | 2011-07-11 20:54 +1200 |
| Message-ID | <97vs3fF61iU1@mid.individual.net> |
| In reply to | #7722 |
On 07/11/11 07:31 PM, eric wrote:
>
> -----------------------------------------------------the program I
> used to compile is-----------------------
> // Example 5-4 formatting a datetime string
> #include<iostream>
> #include<cstdlib>
> #include<ctime>
> #include<cstring>
> #include<string>
> #include<stdexcept>
> #include<iterator>
> #include<sstream>
>
> using namespace std;
>
> ostream& formatDatetime(ostream& out, const tm& t, const char* fmt) {
> const time_put<char>& dateWriter = use_facet<time_put<char>
>> (out.getloc());
In which standard header is time_put declared? Check for balance of <
and >.
> int n = strlen(fmt);
> if (dateWriter.put(out, out, ' ',&t, fmt, fmt + n).failed()) {
> throw runtime_error("failure to format date time");
> }
> return out;
> }
>
> string dateTimeToString(const tm& t, const char* format) {
> stringstream s;
> formatDateTime(s, t, format);
Names are case sensitive!
> return s.str();
> }
--
Ian Collins
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