Author
anonymous
over 5 years ago
Language
C++
Compiler
gcc 9.2.0
Options
Warnings
Boost 1.71.0
C++17
-pedantic
Author
anonymous
over 5 years ago
$ g++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.71.0/gcc-9.2.0/include -std=c++17 -pedantic prog.cc: In instantiation of 'void print(T) [with T = ns::A]':
prog.cc:17:18: required from here
prog.cc:5:23: error: no matching function for call to 'operator<<(std::ostream&, ns::A&)'
5 | return operator<< (std::cout, t);
| ~~~~~~~~~~~^~~~~~~~~~~~~~
In file included from /opt/wandbox/gcc-9.2.0/include/c++/9.2.0/bits/basic_string.h:48,
from /opt/wandbox/gcc-9.2.0/include/c++/9.2.0/string:55,
from /opt/wandbox/gcc-9.2.0/include/c++/9.2.0/bits/locale_classes.h:40,
from /opt/wandbox/gcc-9.2.0/include/c++/9.2.0/bits/ios_base.h:41,
from /opt/wandbox/gcc-9.2.0/include/c++/9.2.0/ios:42,
from /opt/wandbox/gcc-9.2.0/include/c++/9.2.0/ostream:38,
from /opt/wandbox/gcc-9.2.0/include/c++/9.2.0/iostream:39,
from prog.cc:1:
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/string_view:582:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::basic_string_view<_CharT, _Traits>)'
582 | operator<<(basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/string_view:582:5: note: template argument deduction/substitution failed:
prog.cc:5:23: note: 'ns::A' is not derived from 'std::basic_string_view<_CharT, _Traits>'
5 | return operator<< (std::cout, t);
| ~~~~~~~~~~~^~~~~~~~~~~~~~
In file included from /opt/wandbox/gcc-9.2.0/include/c++/9.2.0/string:55,
from /opt/wandbox/gcc-9.2.0/include/c++/9.2.0/bits/locale_classes.h:40,
from /opt/wandbox/gcc-9.2.0/include/c++/9.2.0/bits/ios_base.h:41,
from /opt/wandbox/gcc-9.2.0/include/c++/9.2.0/ios:42,
from /opt/wandbox/gcc-9.2.0/include/c++/9.2.0/ostream:38,
from /opt/wandbox/gcc-9.2.0/include/c++/9.2.0/iostream:39,
from prog.cc:1:
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/bits/basic_string.h:6416:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
6416 | operator<<(basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/bits/basic_string.h:6416:5: note: template argument deduction/substitution failed:
prog.cc:5:23: note: 'ns::A' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
5 | return operator<< (std::cout, t);
| ~~~~~~~~~~~^~~~~~~~~~~~~~
In file included from /opt/wandbox/gcc-9.2.0/include/c++/9.2.0/bits/ios_base.h:46,
from /opt/wandbox/gcc-9.2.0/include/c++/9.2.0/ios:42,
from /opt/wandbox/gcc-9.2.0/include/c++/9.2.0/ostream:38,
from /opt/wandbox/gcc-9.2.0/include/c++/9.2.0/iostream:39,
from prog.cc:1:
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/system_error:217:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::error_code&)'
217 | operator<<(basic_ostream<_CharT, _Traits>& __os, const error_code& __e)
| ^~~~~~~~
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/system_error:217:5: note: template argument deduction/substitution failed:
prog.cc:5:35: note: cannot convert 't' (type 'ns::A') to type 'const std::error_code&'
5 | return operator<< (std::cout, t);
| ^
In file included from /opt/wandbox/gcc-9.2.0/include/c++/9.2.0/iostream:39,
from prog.cc:1:
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/ostream:506:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, _CharT)'
506 | operator<<(basic_ostream<_CharT, _Traits>& __out, _CharT __c)
| ^~~~~~~~
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/ostream:506:5: note: template argument deduction/substitution failed:
prog.cc:5:23: note: deduced conflicting types for parameter '_CharT' ('char' and 'ns::A')
5 | return operator<< (std::cout, t);
| ~~~~~~~~~~~^~~~~~~~~~~~~~
In file included from /opt/wandbox/gcc-9.2.0/include/c++/9.2.0/iostream:39,
from prog.cc:1:
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/ostream:511:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, char)'
511 | operator<<(basic_ostream<_CharT, _Traits>& __out, char __c)
| ^~~~~~~~
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/ostream:511:5: note: template argument deduction/substitution failed:
prog.cc:5:35: note: cannot convert 't' (type 'ns::A') to type 'char'
5 | return operator<< (std::cout, t);
| ^
In file included from /opt/wandbox/gcc-9.2.0/include/c++/9.2.0/iostream:39,
from prog.cc:1:
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/ostream:517:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, char)'
517 | operator<<(basic_ostream<char, _Traits>& __out, char __c)
| ^~~~~~~~
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/ostream:517:5: note: template argument deduction/substitution failed:
prog.cc:5:35: note: cannot convert 't' (type 'ns::A') to type 'char'
5 | return operator<< (std::cout, t);
| ^
In file included from /opt/wandbox/gcc-9.2.0/include/c++/9.2.0/iostream:39,
from prog.cc:1:
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/ostream:523:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, signed char)'
523 | operator<<(basic_ostream<char, _Traits>& __out, signed char __c)
| ^~~~~~~~
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/ostream:523:5: note: template argument deduction/substitution failed:
prog.cc:5:35: note: cannot convert 't' (type 'ns::A') to type 'signed char'
5 | return operator<< (std::cout, t);
| ^
In file included from /opt/wandbox/gcc-9.2.0/include/c++/9.2.0/iostream:39,
from prog.cc:1:
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/ostream:528:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, unsigned char)'
528 | operator<<(basic_ostream<char, _Traits>& __out, unsigned char __c)
| ^~~~~~~~
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/ostream:528:5: note: template argument deduction/substitution failed:
prog.cc:5:35: note: cannot convert 't' (type 'ns::A') to type 'unsigned char'
5 | return operator<< (std::cout, t);
| ^
In file included from /opt/wandbox/gcc-9.2.0/include/c++/9.2.0/iostream:39,
from prog.cc:1:
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/ostream:548:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const _CharT*)'
548 | operator<<(basic_ostream<_CharT, _Traits>& __out, const _CharT* __s)
| ^~~~~~~~
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/ostream:548:5: note: template argument deduction/substitution failed:
prog.cc:5:23: note: mismatched types 'const _CharT*' and 'ns::A'
5 | return operator<< (std::cout, t);
| ~~~~~~~~~~~^~~~~~~~~~~~~~
In file included from /opt/wandbox/gcc-9.2.0/include/c++/9.2.0/ostream:702,
from /opt/wandbox/gcc-9.2.0/include/c++/9.2.0/iostream:39,
from prog.cc:1:
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/bits/ostream.tcc:321:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const char*)'
321 | operator<<(basic_ostream<_CharT, _Traits>& __out, const char* __s)
| ^~~~~~~~
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/bits/ostream.tcc:321:5: note: template argument deduction/substitution failed:
prog.cc:5:35: note: cannot convert 't' (type 'ns::A') to type 'const char*'
5 | return operator<< (std::cout, t);
| ^
In file included from /opt/wandbox/gcc-9.2.0/include/c++/9.2.0/iostream:39,
from prog.cc:1:
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/ostream:565:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const char*)'
565 | operator<<(basic_ostream<char, _Traits>& __out, const char* __s)
| ^~~~~~~~
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/ostream:565:5: note: template argument deduction/substitution failed:
prog.cc:5:35: note: cannot convert 't' (type 'ns::A') to type 'const char*'
5 | return operator<< (std::cout, t);
| ^
In file included from /opt/wandbox/gcc-9.2.0/include/c++/9.2.0/iostream:39,
from prog.cc:1:
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/ostream:578:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const signed char*)'
578 | operator<<(basic_ostream<char, _Traits>& __out, const signed char* __s)
| ^~~~~~~~
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/ostream:578:5: note: template argument deduction/substitution failed:
prog.cc:5:35: note: cannot convert 't' (type 'ns::A') to type 'const signed char*'
5 | return operator<< (std::cout, t);
| ^
In file included from /opt/wandbox/gcc-9.2.0/include/c++/9.2.0/iostream:39,
from prog.cc:1:
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/ostream:583:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const unsigned char*)'
583 | operator<<(basic_ostream<char, _Traits>& __out, const unsigned char* __s)
| ^~~~~~~~
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/ostream:583:5: note: template argument deduction/substitution failed:
prog.cc:5:35: note: cannot convert 't' (type 'ns::A') to type 'const unsigned char*'
5 | return operator<< (std::cout, t);
| ^
In file included from /opt/wandbox/gcc-9.2.0/include/c++/9.2.0/iostream:39,
from prog.cc:1:
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/ostream:691:5: note: candidate: 'template<class _Ostream, class _Tp> typename std::enable_if<std::__and_<std::__not_<std::is_lvalue_reference<_Tp> >, std::__is_convertible_to_basic_ostream<_Ostream>, std::__is_insertable<typename std::__is_convertible_to_basic_ostream<_Tp>::__ostream_type, const _Tp&, void> >::value, typename std::__is_convertible_to_basic_ostream<_Tp>::__ostream_type>::type std::operator<<(_Ostream&&, const _Tp&)'
691 | operator<<(_Ostream&& __os, const _Tp& __x)
| ^~~~~~~~
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/ostream:691:5: note: template argument deduction/substitution failed:
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/ostream: In substitution of 'template<class _Ostream, class _Tp> typename std::enable_if<std::__and_<std::__not_<std::is_lvalue_reference<_Tp> >, std::__is_convertible_to_basic_ostream<_Ostream>, std::__is_insertable<typename std::__is_convertible_to_basic_ostream<_Tp>::__ostream_type, const _Tp&, void> >::value, typename std::__is_convertible_to_basic_ostream<_Tp>::__ostream_type>::type std::operator<<(_Ostream&&, const _Tp&) [with _Ostream = std::basic_ostream<char>&; _Tp = ns::A]':
prog.cc:5:23: required from 'void print(T) [with T = ns::A]'
prog.cc:17:18: required from here
/opt/wandbox/gcc-9.2.0/include/c++/9.2.0/ostream:691:5: error: no type named 'type' in 'struct std::enable_if<false, std::basic_ostream<char>&>'
prog.cc: In instantiation of 'void print(T) [with T = ns::A]':
prog.cc:17:18: required from here
prog.cc:5:36: error: return-statement with a value, in function returning 'void' [-fpermissive]
5 | return operator<< (std::cout, t);
| ^
Exit Code:
1