Subject: [Boost-bugs] [Boost C++ Libraries] #11631: boost chrono io v2 does not let you support custom clocks
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2015-09-09 10:00:25
#11631: boost chrono io v2 does not let you support custom clocks
-------------------------------------------------+---------------------
Reporter: Sébastien Barthélémy <barthelemy@…> | Owner: viboes
Type: Bugs | Status: new
Milestone: To Be Determined | Component: chrono
Version: Boost 1.58.0 | Severity: Problem
Keywords: |
-------------------------------------------------+---------------------
v1 lets you specialize struct clock_string in order to add support for a
custom clock.
I could not find a way to do the equivalent with v2. If confirmed, that
would also mean that boost chrono io canot support std::chrono clocks.
Attached is a minimalistic example showing a custom clock with chrono io
v1 support. The code does not compile under v2.
Compilation result with boost 1.58
{{{
$ make clean && make test
rm -f src/*.o src/chrono_io
clang++ -std=c++11 -c -g -fPIC -Iinclude -I/usr/include -o src/chrono_io.o
src/chrono_io.cc
clang++ -std=c++11 -rdynamic -Lsrc -o src/chrono_io src/chrono_io.o
-lboost_chrono -lboost_system -L/usr/lib/x86_64-linux-gnu
LD_LIBRARY_PATH=/usr/lib/x86_64-linux-gnu ./src/chrono_io
1402372272646902866 nanoseconds since year 2k
}}}
idem with #define BOOST_CHRONO_DONT_PROVIDES_DEPRECATED_IO_SINCE_V2_0_0
{{{
$ make clean && make test
rm -f src/*.o src/chrono_io
clang++ -std=c++11 -c -g -fPIC -Iinclude -I/usr/include -o src/chrono_io.o
src/chrono_io.cc
In file included from src/chrono_io.cc:4:
In file included from /usr/include/boost/chrono/chrono_io.hpp:26:
In file included from /usr/include/boost/chrono/io/time_point_io.hpp:22:
In file included from /usr/include/boost/chrono/io/time_point_put.hpp:15:
/usr/include/boost/chrono/io/time_point_units.hpp:77:16: error: no
matching member function for call to 'do_get_epoch'
return do_get_epoch(Clock());
^~~~~~~~~~~~
/usr/include/boost/chrono/io/time_point_put.hpp:236:42: note: in
instantiation of function template specialization
'boost::chrono::time_point_units<char>::get_epoch<MyMillenniumClock>'
requested here
string_type str = facet.template get_epoch<Clock>();
^
/usr/include/boost/chrono/io/time_point_put.hpp:134:19: note: in
instantiation of function template specialization
'boost::chrono::time_point_put<char, std::ostreambuf_iterator<char,
std::char_traits<char> > >::put_epoch<MyMillenniumClock>' requested
here
s = put_epoch<Clock> (units_facet, s, ios);
^
/usr/include/boost/chrono/io/time_point_put.hpp:170:18: note: in
instantiation of function template specialization
'boost::chrono::time_point_put<char, std::ostreambuf_iterator<char,
std::char_traits<char> > >::put<MyMillenniumClock,
boost::chrono::duration<long, boost::ratio<1, 1000000000> > >'
requested here
return put(facet, i, ios, fill, tp, str.data(), str.data() +
str.size());
^
/usr/include/boost/chrono/io/time_point_io.hpp:662:44: note: in
instantiation of function template specialization
'boost::chrono::time_point_put<char, std::ostreambuf_iterator<char,
std::char_traits<char> > >::put<MyMillenniumClock,
boost::chrono::duration<long, boost::ratio<1, 1000000000> > >'
requested here
if (time_point_put<CharT> ().put(os, os, os.fill(), tp)
.failed())
^
src/chrono_io.cc:45:15: note: in instantiation of function template
specialization 'boost::chrono::operator<<<char, std::char_traits<char>,
MyMillenniumClock, boost::chrono::duration<long, boost::ratio<1,
1000000000> > >' requested here
std::cout << MyMillenniumClock::now() << std::endl;
^
/usr/include/boost/chrono/io/time_point_units.hpp:92:27: note: candidate
function not viable: no known conversion from 'MyMillenniumClock' to
'boost::chrono::system_clock' for 1st argument
virtual string_type do_get_epoch(system_clock) const=0;
^
/usr/include/boost/chrono/io/time_point_units.hpp:99:27: note: candidate
function not viable: no known conversion from 'MyMillenniumClock' to
'boost::chrono::steady_clock' for 1st argument
virtual string_type do_get_epoch(steady_clock) const=0;
^
/usr/include/boost/chrono/io/time_point_units.hpp:107:27: note: candidate
function not viable: no known conversion from 'MyMillenniumClock' to
'boost::chrono::process_real_cpu_clock' for 1st argument
virtual string_type do_get_epoch(process_real_cpu_clock) const=0;
^
/usr/include/boost/chrono/io/time_point_units.hpp:114:27: note: candidate
function not viable: no known conversion from 'MyMillenniumClock' to
'boost::chrono::process_user_cpu_clock' for 1st argument
virtual string_type do_get_epoch(process_user_cpu_clock) const=0;
^
/usr/include/boost/chrono/io/time_point_units.hpp:120:27: note: candidate
function not viable: no known conversion from 'MyMillenniumClock' to
'boost::chrono::process_system_cpu_clock' for 1st argument
virtual string_type do_get_epoch(process_system_cpu_clock) const=0;
^
/usr/include/boost/chrono/io/time_point_units.hpp:126:27: note: candidate
function not viable: no known conversion from 'MyMillenniumClock' to
'boost::chrono::process_cpu_clock' for 1st argument
virtual string_type do_get_epoch(process_cpu_clock) const=0;
^
/usr/include/boost/chrono/io/time_point_units.hpp:135:27: note: candidate
function not viable: no known conversion from 'MyMillenniumClock' to
'boost::chrono::thread_clock' for 1st argument
virtual string_type do_get_epoch(thread_clock) const=0;
^
1 error generated.
Makefile:7: recipe for target 'src/chrono_io.o' failed
make: *** [src/chrono_io.o] Error 1
}}}
-- Ticket URL: <https://svn.boost.org/trac/boost/ticket/11631> Boost C++ Libraries <http://www.boost.org/> Boost provides free peer-reviewed portable C++ source libraries.
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