foo.cc: In function ‘int main()’:
foo.cc:7:13: error: no match for ‘operator<<’ (operand types are ‘std::istream’ {aka ‘std::basic_istream<char>’} and ‘int’)
7 | cin << a << b;
| ~~~ ^~ ~
| | |
| | int
| std::istream {aka std::basic_istream<char>}
foo.cc:7:13: note: candidate: ‘operator<<(int, int)’ (built-in)
7 | cin << a << b;
| ~~~~^~~~
foo.cc:7:13: note: no known conversion for argument 1 from ‘std::istream’ {aka ‘std::basic_istream<char>’} to ‘int’
In file included from /nix/gcc-13.3.0/include/c++/13.3.0/regex:68,
from stdc++.h:181:
/nix/gcc-13.3.0/include/c++/13.3.0/bits/regex.h:1715:5: note: candidate: ‘template<class _Ch_type, class _Ch_traits, class _Bi_iter> std::basic_ostream<_CharT, _Traits>& std::__cxx11::operator<<(std::basic_ostream<_CharT, _Traits>&, const sub_match<_Bi_iter>&)’
1715 | operator<<(basic_ostream<_Ch_type, _Ch_traits>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/regex.h:1715:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
In file included from /nix/gcc-13.3.0/include/c++/13.3.0/string:54,
from /nix/gcc-13.3.0/include/c++/13.3.0/bitset:52,
from stdc++.h:52:
/nix/gcc-13.3.0/include/c++/13.3.0/bits/basic_string.h:4032:5: note: candidate: ‘template<class _CharT, class _Traits, class _Alloc> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const __cxx11::basic_string<_CharT, _Traits, _Alloc>&)’
4032 | operator<<(basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/basic_string.h:4032:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bitset:1683:5: note: candidate: ‘template<class _CharT, class _Traits, long unsigned int _Nb> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const bitset<_Nb>&)’
1683 | operator<<(std::basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bitset:1683:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
In file included from /nix/gcc-13.3.0/include/c++/13.3.0/bits/ios_base.h:46,
from /nix/gcc-13.3.0/include/c++/13.3.0/streambuf:43,
from /nix/gcc-13.3.0/include/c++/13.3.0/bits/streambuf_iterator.h:35,
from /nix/gcc-13.3.0/include/c++/13.3.0/iterator:66,
from stdc++.h:54:
/nix/gcc-13.3.0/include/c++/13.3.0/system_error:339:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const error_code&)’
339 | operator<<(basic_ostream<_CharT, _Traits>& __os, const error_code& __e)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/system_error:339:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
In file included from /nix/gcc-13.3.0/include/c++/13.3.0/memory:80,
from stdc++.h:56:
/nix/gcc-13.3.0/include/c++/13.3.0/bits/shared_ptr.h:70:5: note: candidate: ‘template<class _Ch, class _Tr, class _Tp, __gnu_cxx::_Lock_policy _Lp> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const __shared_ptr<_Tp, _Lp>&)’
70 | operator<<(std::basic_ostream<_Ch, _Tr>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/shared_ptr.h:70:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
In file included from /nix/gcc-13.3.0/include/c++/13.3.0/istream:41,
from /nix/gcc-13.3.0/include/c++/13.3.0/sstream:40,
from /nix/gcc-13.3.0/include/c++/13.3.0/complex:45,
from /nix/gcc-13.3.0/include/c++/13.3.0/ccomplex:39,
from stdc++.h:127:
/nix/gcc-13.3.0/include/c++/13.3.0/ostream:554:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _CharT)’
554 | operator<<(basic_ostream<_CharT, _Traits>& __out, _CharT __c)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/ostream:554:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/ostream:564:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, char)’
564 | operator<<(basic_ostream<_CharT, _Traits>& __out, char __c)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/ostream:564:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/ostream:570:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, char)’
570 | operator<<(basic_ostream<char, _Traits>& __out, char __c)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/ostream:570:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<char, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/ostream:581:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, signed char)’
581 | operator<<(basic_ostream<char, _Traits>& __out, signed char __c)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/ostream:581:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<char, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/ostream:586:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, unsigned char)’
586 | operator<<(basic_ostream<char, _Traits>& __out, unsigned char __c)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/ostream:586:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<char, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/ostream:645:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const _CharT*)’
645 | operator<<(basic_ostream<_CharT, _Traits>& __out, const _CharT* __s)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/ostream:645:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
In file included from /nix/gcc-13.3.0/include/c++/13.3.0/ostream:880:
/nix/gcc-13.3.0/include/c++/13.3.0/bits/ostream.tcc:307:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const char*)’
307 | operator<<(basic_ostream<_CharT, _Traits>& __out, const char* __s)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/ostream.tcc:307:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/ostream:662:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, const char*)’
662 | operator<<(basic_ostream<char, _Traits>& __out, const char* __s)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/ostream:662:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<char, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/ostream:675:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, const signed char*)’
675 | operator<<(basic_ostream<char, _Traits>& __out, const signed char* __s)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/ostream:675:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<char, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/ostream:680:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, const unsigned char*)’
680 | operator<<(basic_ostream<char, _Traits>& __out, const unsigned char* __s)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/ostream:680:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<char, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/ostream:801:5: note: candidate: ‘template<class _Ostream, class _Tp> _Ostream&& std::operator<<(_Ostream&&, const _Tp&)’
801 | operator<<(_Ostream&& __os, const _Tp& __x)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/ostream:801:5: note: template argument deduction/substitution failed:
/nix/gcc-13.3.0/include/c++/13.3.0/ostream: In substitution of ‘template<class _Ostream, class _Tp> _Ostream&& std::operator<<(_Ostream&&, const _Tp&) [with _Ostream = std::basic_istream<char>&; _Tp = int]’:
foo.cc:7:9: required from here
/nix/gcc-13.3.0/include/c++/13.3.0/ostream:801:5: error: no type named ‘type’ in ‘struct std::enable_if<false, void>’
/nix/gcc-13.3.0/include/c++/13.3.0/complex:558:5: note: candidate: ‘template<class _Tp, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const complex<_Tp>&)’
558 | operator<<(basic_ostream<_CharT, _Traits>& __os, const complex<_Tp>& __x)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/complex:558:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
In file included from stdc++.h:143:
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:81:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _Resetiosflags)’
81 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Resetiosflags __f)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:81:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:111:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _Setiosflags)’
111 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Setiosflags __f)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:111:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:145:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _Setbase)’
145 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Setbase __f)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:145:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:180:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _Setfill<_CharT>)’
180 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Setfill<_CharT> __f)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:180:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:210:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _Setprecision)’
210 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Setprecision __f)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:210:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:240:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _Setw)’
240 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Setw __f)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:240:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:313:5: note: candidate: ‘template<class _CharT, class _Traits, class _MoneyT> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _Put_money<_MoneyT>)’
313 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Put_money<_MoneyT> __f)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:313:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:365:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _Put_time<_CharT>)’
365 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Put_time<_CharT> __f)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:365:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
In file included from /nix/gcc-13.3.0/include/c++/13.3.0/valarray:605,
from stdc++.h:166:
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:413:5: note: candidate: ‘template<class _Dom1, class _Dom2> std::_Expr<std::__detail::_BinClos<std::__shift_left, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__shift_left, typename _Dom1::value_type>::result_type> std::operator<<(const _Expr<_Dom1, typename _Dom1::value_type>&, const _Expr<_Dom2, typename _Dom2::value_type>&)’
413 | _DEFINE_EXPR_BINARY_OPERATOR(<<, struct std::__shift_left)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:413:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:413:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__shift_left, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__shift_left, typename _Dom1::value_type>::result_type> std::operator<<(const _Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)’
413 | _DEFINE_EXPR_BINARY_OPERATOR(<<, struct std::__shift_left)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:413:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:413:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__shift_left, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__shift_left, typename _Dom1::value_type>::result_type> std::operator<<(const typename _Dom::value_type&, const _Expr<_Dom1, typename _Dom1::value_type>&)’
413 | _DEFINE_EXPR_BINARY_OPERATOR(<<, struct std::__shift_left)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:413:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: mismatched types ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’ and ‘int’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:413:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__shift_left, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__shift_left, typename _Dom1::value_type>::result_type> std::operator<<(const _Expr<_Dom1, typename _Dom1::value_type>&, const valarray<typename _Dom::value_type>&)’
413 | _DEFINE_EXPR_BINARY_OPERATOR(<<, struct std::__shift_left)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:413:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:413:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__shift_left, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__shift_left, typename _Dom1::value_type>::result_type> std::operator<<(const valarray<typename _Dom::value_type>&, const _Expr<_Dom1, typename _Dom1::value_type>&)’
413 | _DEFINE_EXPR_BINARY_OPERATOR(<<, struct std::__shift_left)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:413:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: mismatched types ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’ and ‘int’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/valarray:1204:1: note: candidate: ‘template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__shift_left, std::_ValArray, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__shift_left, _Tp>::result_type> std::operator<<(const valarray<_Tp>&, const valarray<_Tp>&)’
1204 | _DEFINE_BINARY_OPERATOR(<<, __shift_left)
| ^~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/valarray:1204:1: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘const std::valarray<_Tp>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/valarray:1204:1: note: candidate: ‘template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__shift_left, std::_ValArray, std::_Constant, _Tp, _Tp>, typename std::__fun<std::__shift_left, _Tp>::result_type> std::operator<<(const valarray<_Tp>&, const typename valarray<_Tp>::value_type&)’
1204 | _DEFINE_BINARY_OPERATOR(<<, __shift_left)
| ^~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/valarray:1204:1: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘const std::valarray<_Tp>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/valarray:1204:1: note: candidate: ‘template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__shift_left, std::_Constant, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__shift_left, _Tp>::result_type> std::operator<<(const typename valarray<_Tp>::value_type&, const valarray<_Tp>&)’
1204 | _DEFINE_BINARY_OPERATOR(<<, __shift_left)
| ^~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/valarray:1204:1: note: template argument deduction/substitution failed:
foo.cc:7:16: note: mismatched types ‘const std::valarray<_Tp>’ and ‘int’
7 | cin << a << b;
| ^
In file included from /nix/gcc-13.3.0/include/c++/13.3.0/random:51,
from stdc++.h:179:
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.h:1341:5: note: candidate: ‘template<class _RandomNumberEngine, long unsigned int __w, class _UIntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const independent_bits_engine<_RandomNumberEngine, __w, _UIntType>&)’
1341 | operator<<(std::basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.h:1341:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
In file included from /nix/gcc-13.3.0/include/c++/13.3.0/random:53:
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:910:5: note: candidate: ‘template<class _IntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const uniform_int_distribution<_IntType>&)’
910 | operator<<(std::basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:910:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:968:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const uniform_real_distribution<_IntType>&)’
968 | operator<<(std::basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:968:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2145:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const cauchy_distribution<_RealType>&)’
2145 | operator<<(std::basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2145:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:1029:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const bernoulli_distribution&)’
1029 | operator<<(std::basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:1029:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:1110:5: note: candidate: ‘template<class _IntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const geometric_distribution<_IntType>&)’
1110 | operator<<(std::basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:1110:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:1762:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const exponential_distribution<_RealType>&)’
1762 | operator<<(std::basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:1762:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2539:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const weibull_distribution<_RealType>&)’
2539 | operator<<(std::basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2539:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2613:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const extreme_value_distribution<_RealType>&)’
2613 | operator<<(std::basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2613:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:156:5: note: candidate: ‘template<class _UIntType, _UIntType __a, _UIntType __c, _UIntType __m, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const linear_congruential_engine<_UIntType, __a, __c, __m>&)’
156 | operator<<(std::basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:156:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:477:5: note: candidate: ‘template<class _UIntType1, long unsigned int __w1, long unsigned int __n1, long unsigned int __m1, long unsigned int __r1, _UIntType1 __a1, long unsigned int __u1, _UIntType1 __d1, long unsigned int __s1, _UIntType1 __b1, long unsigned int __t1, _UIntType1 __c1, long unsigned int __l1, _UIntType1 __f1, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>&)’
477 | operator<<(std::basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:477:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:635:5: note: candidate: ‘template<class _UIntType, long unsigned int __w, long unsigned int __s, long unsigned int __r, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const subtract_with_carry_engine<_UIntType, __w, __s, __r>&)’
635 | operator<<(std::basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:635:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:704:5: note: candidate: ‘template<class _RandomNumberEngine, long unsigned int __p, long unsigned int __r, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const discard_block_engine<_RandomNumberEngine, __p, __r>&)’
704 | operator<<(std::basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:704:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:866:5: note: candidate: ‘template<class _RandomNumberEngine, long unsigned int __k, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const shuffle_order_engine<_RandomNumberEngine, __k>&)’
866 | operator<<(std::basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:866:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:1224:5: note: candidate: ‘template<class _IntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const negative_binomial_distribution<_IntType>&)’
1224 | operator<<(std::basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:1224:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:1434:5: note: candidate: ‘template<class _IntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const poisson_distribution<_IntType>&)’
1434 | operator<<(std::basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:1434:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:1700:5: note: candidate: ‘template<class _IntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const binomial_distribution<_IntType>&)’
1700 | operator<<(std::basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:1700:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:1920:5: note: candidate: ‘template<class _RealType1, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const normal_distribution<_RealType>&)’
1920 | operator<<(std::basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:1920:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:1987:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const lognormal_distribution<_RealType>&)’
1987 | operator<<(std::basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:1987:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2059:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const chi_squared_distribution<_RealType>&)’
2059 | operator<<(std::basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2059:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2220:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const fisher_f_distribution<_RealType>&)’
2220 | operator<<(std::basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2220:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2294:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const student_t_distribution<_RealType>&)’
2294 | operator<<(std::basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2294:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2463:5: note: candidate: ‘template<class _RealType1, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const gamma_distribution<_RealType>&)’
2463 | operator<<(std::basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2463:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2749:5: note: candidate: ‘template<class _IntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const discrete_distribution<_IntType>&)’
2749 | operator<<(std::basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2749:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2971:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const piecewise_constant_distribution<_RealType>&)’
2971 | operator<<(std::basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2971:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:3177:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const piecewise_linear_distribution<_RealType>&)’
3177 | operator<<(std::basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:3177:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
In file included from stdc++.h:184:
/nix/gcc-13.3.0/include/c++/13.3.0/thread:97:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, thread::id)’
97 | operator<<(basic_ostream<_CharT, _Traits>& __out, thread::id __id)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/thread:97:5: note: template argument deduction/substitution failed:
foo.cc:7:16: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’
7 | cin << a << b;
| ^
foo.cc:8:14: error: no match for ‘operator>>’ (operand types are ‘std::ostream’ {aka ‘std::basic_ostream<char>’} and ‘int’)
8 | cout >> a + b;
| ~~~~ ^~ ~~~~~
| | |
| | int
| std::ostream {aka std::basic_ostream<char>}
foo.cc:8:14: note: candidate: ‘operator>>(int, int)’ (built-in)
8 | cout >> a + b;
| ~~~~~^~~~~~~~
foo.cc:8:14: note: no known conversion for argument 1 from ‘std::ostream’ {aka ‘std::basic_ostream<char>’} to ‘int’
In file included from /nix/gcc-13.3.0/include/c++/13.3.0/string:55:
/nix/gcc-13.3.0/include/c++/13.3.0/bits/basic_string.tcc:827:5: note: candidate: ‘template<class _CharT, class _Traits, class _Alloc> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, __cxx11::basic_string<_CharT, _Traits, _Alloc>&)’
827 | operator>>(basic_istream<_CharT, _Traits>& __in,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/basic_string.tcc:827:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bitset:1593:5: note: candidate: ‘template<class _CharT, class _Traits, long unsigned int _Nb> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, bitset<_Nb>&)’
1593 | operator>>(std::basic_istream<_CharT, _Traits>& __is, bitset<_Nb>& __x)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bitset:1593:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
In file included from /nix/gcc-13.3.0/include/c++/13.3.0/istream:1106:
/nix/gcc-13.3.0/include/c++/13.3.0/bits/istream.tcc:975:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _CharT&)’
975 | operator>>(basic_istream<_CharT, _Traits>& __in, _CharT& __c)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/istream.tcc:975:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/istream:846:5: note: candidate: ‘template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(basic_istream<char, _Traits>&, unsigned char&)’
846 | operator>>(basic_istream<char, _Traits>& __in, unsigned char& __c)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/istream:846:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<char, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/istream:851:5: note: candidate: ‘template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(basic_istream<char, _Traits>&, signed char&)’
851 | operator>>(basic_istream<char, _Traits>& __in, signed char& __c)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/istream:851:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<char, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/istream:893:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _CharT*)’
893 | operator>>(basic_istream<_CharT, _Traits>& __in, _CharT* __s)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/istream:893:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/istream:936:5: note: candidate: ‘template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(basic_istream<char, _Traits>&, unsigned char*)’
936 | operator>>(basic_istream<char, _Traits>& __in, unsigned char* __s)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/istream:936:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<char, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/istream:942:5: note: candidate: ‘template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(basic_istream<char, _Traits>&, signed char*)’
942 | operator>>(basic_istream<char, _Traits>& __in, signed char* __s)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/istream:942:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<char, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/istream:1096:5: note: candidate: ‘template<class _Istream, class _Tp> _Istream&& std::operator>>(_Istream&&, _Tp&&)’
1096 | operator>>(_Istream&& __is, _Tp&& __x)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/istream:1096:5: note: template argument deduction/substitution failed:
/nix/gcc-13.3.0/include/c++/13.3.0/istream: In substitution of ‘template<class _Istream, class _Tp> _Istream&& std::operator>>(_Istream&&, _Tp&&) [with _Istream = std::basic_ostream<char>&; _Tp = int]’:
foo.cc:8:14: required from here
/nix/gcc-13.3.0/include/c++/13.3.0/istream:1096:5: error: no type named ‘type’ in ‘struct std::enable_if<false, void>’
/nix/gcc-13.3.0/include/c++/13.3.0/complex:504:5: note: candidate: ‘template<class _Tp, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, complex<_Tp>&)’
504 | operator>>(basic_istream<_CharT, _Traits>& __is, complex<_Tp>& __x)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/complex:504:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:73:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _Resetiosflags)’
73 | operator>>(basic_istream<_CharT, _Traits>& __is, _Resetiosflags __f)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:73:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:103:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _Setiosflags)’
103 | operator>>(basic_istream<_CharT, _Traits>& __is, _Setiosflags __f)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:103:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:134:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _Setbase)’
134 | operator>>(basic_istream<_CharT, _Traits>& __is, _Setbase __f)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:134:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:172:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _Setfill<_CharT>)’
172 | operator>>(basic_istream<_CharT, _Traits>& __is, _Setfill<_CharT> __f)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:172:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:202:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _Setprecision)’
202 | operator>>(basic_istream<_CharT, _Traits>& __is, _Setprecision __f)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:202:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:232:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _Setw)’
232 | operator>>(basic_istream<_CharT, _Traits>& __is, _Setw __f)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:232:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:266:5: note: candidate: ‘template<class _CharT, class _Traits, class _MoneyT> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _Get_money<_MoneyT>)’
266 | operator>>(basic_istream<_CharT, _Traits>& __is, _Get_money<_MoneyT> __f)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:266:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:420:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _Get_time<_CharT>)’
420 | operator>>(basic_istream<_CharT, _Traits>& __is, _Get_time<_CharT> __f)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/iomanip:420:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:414:5: note: candidate: ‘template<class _Dom1, class _Dom2> std::_Expr<std::__detail::_BinClos<std::__shift_right, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__shift_right, typename _Dom1::value_type>::result_type> std::operator>>(const _Expr<_Dom1, typename _Dom1::value_type>&, const _Expr<_Dom2, typename _Dom2::value_type>&)’
414 | _DEFINE_EXPR_BINARY_OPERATOR(>>, struct std::__shift_right)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:414:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:414:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__shift_right, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__shift_right, typename _Dom1::value_type>::result_type> std::operator>>(const _Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)’
414 | _DEFINE_EXPR_BINARY_OPERATOR(>>, struct std::__shift_right)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:414:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:414:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__shift_right, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__shift_right, typename _Dom1::value_type>::result_type> std::operator>>(const typename _Dom::value_type&, const _Expr<_Dom1, typename _Dom1::value_type>&)’
414 | _DEFINE_EXPR_BINARY_OPERATOR(>>, struct std::__shift_right)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:414:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: mismatched types ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’ and ‘int’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:414:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__shift_right, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__shift_right, typename _Dom1::value_type>::result_type> std::operator>>(const _Expr<_Dom1, typename _Dom1::value_type>&, const valarray<typename _Dom::value_type>&)’
414 | _DEFINE_EXPR_BINARY_OPERATOR(>>, struct std::__shift_right)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:414:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:414:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__shift_right, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__shift_right, typename _Dom1::value_type>::result_type> std::operator>>(const valarray<typename _Dom::value_type>&, const _Expr<_Dom1, typename _Dom1::value_type>&)’
414 | _DEFINE_EXPR_BINARY_OPERATOR(>>, struct std::__shift_right)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:414:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: mismatched types ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’ and ‘int’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/valarray:1205:1: note: candidate: ‘template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__shift_right, std::_ValArray, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__shift_right, _Tp>::result_type> std::operator>>(const valarray<_Tp>&, const valarray<_Tp>&)’
1205 | _DEFINE_BINARY_OPERATOR(>>, __shift_right)
| ^~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/valarray:1205:1: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘const std::valarray<_Tp>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/valarray:1205:1: note: candidate: ‘template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__shift_right, std::_ValArray, std::_Constant, _Tp, _Tp>, typename std::__fun<std::__shift_right, _Tp>::result_type> std::operator>>(const valarray<_Tp>&, const typename valarray<_Tp>::value_type&)’
1205 | _DEFINE_BINARY_OPERATOR(>>, __shift_right)
| ^~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/valarray:1205:1: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘const std::valarray<_Tp>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/valarray:1205:1: note: candidate: ‘template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__shift_right, std::_Constant, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__shift_right, _Tp>::result_type> std::operator>>(const typename valarray<_Tp>::value_type&, const valarray<_Tp>&)’
1205 | _DEFINE_BINARY_OPERATOR(>>, __shift_right)
| ^~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/valarray:1205:1: note: template argument deduction/substitution failed:
foo.cc:8:21: note: mismatched types ‘const std::valarray<_Tp>’ and ‘int’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:930:5: note: candidate: ‘template<class _IntType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, uniform_int_distribution<_IntType>&)’
930 | operator>>(std::basic_istream<_CharT, _Traits>& __is,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:930:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:991:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, uniform_real_distribution<_IntType>&)’
991 | operator>>(std::basic_istream<_CharT, _Traits>& __is,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:991:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2168:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, cauchy_distribution<_RealType>&)’
2168 | operator>>(std::basic_istream<_CharT, _Traits>& __is,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2168:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.h:3830:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, bernoulli_distribution&)’
3830 | operator>>(std::basic_istream<_CharT, _Traits>& __is,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.h:3830:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:1133:5: note: candidate: ‘template<class _IntType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, geometric_distribution<_IntType>&)’
1133 | operator>>(std::basic_istream<_CharT, _Traits>& __is,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:1133:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:1784:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, exponential_distribution<_RealType>&)’
1784 | operator>>(std::basic_istream<_CharT, _Traits>& __is,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:1784:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2562:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, weibull_distribution<_RealType>&)’
2562 | operator>>(std::basic_istream<_CharT, _Traits>& __is,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2562:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2636:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, extreme_value_distribution<_RealType>&)’
2636 | operator>>(std::basic_istream<_CharT, _Traits>& __is,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2636:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:177:5: note: candidate: ‘template<class _UIntType, _UIntType __a, _UIntType __c, _UIntType __m, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, linear_congruential_engine<_UIntType, __a, __c, __m>&)’
177 | operator>>(std::basic_istream<_CharT, _Traits>& __is,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:177:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:504:5: note: candidate: ‘template<class _UIntType1, long unsigned int __w1, long unsigned int __n1, long unsigned int __m1, long unsigned int __r1, _UIntType1 __a1, long unsigned int __u1, _UIntType1 __d1, long unsigned int __s1, _UIntType1 __b1, long unsigned int __t1, _UIntType1 __c1, long unsigned int __l1, _UIntType1 __f1, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>&)’
504 | operator>>(std::basic_istream<_CharT, _Traits>& __is,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:504:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:659:5: note: candidate: ‘template<class _UIntType, long unsigned int __w, long unsigned int __s, long unsigned int __r, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, subtract_with_carry_engine<_UIntType, __w, __s, __r>&)’
659 | operator>>(std::basic_istream<_CharT, _Traits>& __is,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:659:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:726:5: note: candidate: ‘template<class _RandomNumberEngine, long unsigned int __p, long unsigned int __r, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, discard_block_engine<_RandomNumberEngine, __p, __r>&)’
726 | operator>>(std::basic_istream<_CharT, _Traits>& __is,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:726:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:890:5: note: candidate: ‘template<class _RandomNumberEngine, long unsigned int __k, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, shuffle_order_engine<_RandomNumberEngine, __k>&)’
890 | operator>>(std::basic_istream<_CharT, _Traits>& __is,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:890:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:1248:5: note: candidate: ‘template<class _IntType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, negative_binomial_distribution<_IntType>&)’
1248 | operator>>(std::basic_istream<_CharT, _Traits>& __is,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:1248:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:1458:5: note: candidate: ‘template<class _IntType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, poisson_distribution<_IntType>&)’
1458 | operator>>(std::basic_istream<_CharT, _Traits>& __is,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:1458:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:1725:5: note: candidate: ‘template<class _IntType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, binomial_distribution<_IntType>&)’
1725 | operator>>(std::basic_istream<_CharT, _Traits>& __is,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:1725:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:1946:5: note: candidate: ‘template<class _RealType1, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, normal_distribution<_RealType>&)’
1946 | operator>>(std::basic_istream<_CharT, _Traits>& __is,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:1946:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2011:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, lognormal_distribution<_RealType>&)’
2011 | operator>>(std::basic_istream<_CharT, _Traits>& __is,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2011:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2082:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, chi_squared_distribution<_RealType>&)’
2082 | operator>>(std::basic_istream<_CharT, _Traits>& __is,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2082:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2244:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, fisher_f_distribution<_RealType>&)’
2244 | operator>>(std::basic_istream<_CharT, _Traits>& __is,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2244:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2317:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, student_t_distribution<_RealType>&)’
2317 | operator>>(std::basic_istream<_CharT, _Traits>& __is,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2317:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2487:5: note: candidate: ‘template<class _RealType1, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, gamma_distribution<_RealType>&)’
2487 | operator>>(std::basic_istream<_CharT, _Traits>& __is,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2487:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2795:5: note: candidate: ‘template<class _IntType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, discrete_distribution<_IntType>&)’
2795 | operator>>(std::basic_istream<_CharT, _Traits>& __is,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:2795:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:3002:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, piecewise_constant_distribution<_RealType>&)’
3002 | operator>>(std::basic_istream<_CharT, _Traits>& __is,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:3002:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:3208:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, piecewise_linear_distribution<_RealType>&)’
3208 | operator>>(std::basic_istream<_CharT, _Traits>& __is,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/random.tcc:3208:5: note: template argument deduction/substitution failed:
foo.cc:8:21: note: ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
8 | cout >> a + b;
| ^
foo.cc:8:19: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses]
8 | cout >> a + b;
| ~~^~~
floating cloud LV 6
undefined
