Show Lecture.SyntaxErrors as a slide show.
CS253 Syntax Errors
KEEP
CALM
and
FIND
SYNTAX
ERRORS
Syntax errors
Interpreting compiler syntax errors can take a bit of practice.
My algorithm:
- Note the line number in the error message.
- Look at that line in the source code.
- If that solved the problem, great, we’re done.
- Otherwise, read the error message.
Options
By default, without -Wfatal-errors, g++ will provide
all manner of helpful suggestions:
vector<int> v;
cout << v;
c.cc:2: error: no match for 'operator<<' in 'std::cout << v' (operand types are
'std::ostream' {aka 'std::basic_ostream<char>'} and 'std::vector<int>')
In file included from /usr/include/c++/8/istream:39,
from /usr/include/c++/8/sstream:38,
from /usr/include/c++/8/complex:45,
from /usr/include/c++/8/ccomplex:39,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:52,
from c.cc:1:
/usr/include/c++/8/ostream:108: note: candidate: 'std::basic_ostream<_CharT,
_Traits>::__ostream_type& std::basic_ostream<_CharT,
_Traits>::operator<<(std::basic_ostream<_CharT, _Traits>::__ostream_type&
(*)(std::basic_ostream<_CharT, _Traits>::__ostream_type&)) [with _CharT =
char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT,
_Traits>::__ostream_type = std::basic_ostream<char>]'
/usr/include/c++/8/ostream:108: note: no known conversion for argument 1 from
'std::vector<int>' to 'std::basic_ostream<char>::__ostream_type&
(*)(std::basic_ostream<char>::__ostream_type&)' {aka
'std::basic_ostream<char>& (*)(std::basic_ostream<char>&)'}
/usr/include/c++/8/ostream:117: note: candidate: 'std::basic_ostream<_CharT,
_Traits>::__ostream_type& std::basic_ostream<_CharT,
_Traits>::operator<<(std::basic_ostream<_CharT, _Traits>::__ios_type&
(*)(std::basic_ostream<_CharT, _Traits>::__ios_type&)) [with _CharT = char;
_Traits = std::char_traits<char>; std::basic_ostream<_CharT,
_Traits>::__ostream_type = std::basic_ostream<char>;
std::basic_ostream<_CharT, _Traits>::__ios_type = std::basic_ios<char>]'
/usr/include/c++/8/ostream:117: note: no known conversion for argument 1 from
'std::vector<int>' to 'std::basic_ostream<char>::__ios_type&
(*)(std::basic_ostream<char>::__ios_type&)' {aka 'std::basic_ios<char>&
(*)(std::basic_ios<char>&)'}
/usr/include/c++/8/ostream:127: note: candidate: 'std::basic_ostream<_CharT,
_Traits>::__ostream_type& std::basic_ostream<_CharT,
_Traits>::operator<<(std::ios_base& (*)(std::ios_base&)) [with _CharT =
char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT,
_Traits>::__ostream_type = std::basic_ostream<char>]'
/usr/include/c++/8/ostream:127: note: no known conversion for argument 1 from
'std::vector<int>' to 'std::ios_base& (*)(std::ios_base&)'
/usr/include/c++/8/ostream:166: note: candidate: 'std::basic_ostream<_CharT,
_Traits>::__ostream_type& std::basic_ostream<_CharT,
_Traits>::operator<<(long int) [with _CharT = char; _Traits =
std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type
= std::basic_ostream<char>]'
/usr/include/c++/8/ostream:166: note: no known conversion for argument 1 from
'std::vector<int>' to 'long int'
/usr/include/c++/8/ostream:170: note: candidate: 'std::basic_ostream<_CharT,
_Traits>::__ostream_type& std::basic_ostream<_CharT,
_Traits>::operator<<(long unsigned int) [with _CharT = char; _Traits =
std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type
= std::basic_ostream<char>]'
/usr/include/c++/8/ostream:170: note: no known conversion for argument 1 from
'std::vector<int>' to 'long unsigned int'
/usr/include/c++/8/ostream:174: note: candidate: 'std::basic_ostream<_CharT,
_Traits>::__ostream_type& std::basic_ostream<_CharT,
_Traits>::operator<<(bool) [with _CharT = char; _Traits =
std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type
= std::basic_ostream<char>]'
/usr/include/c++/8/ostream:174: note: no known conversion for argument 1 from
'std::vector<int>' to 'bool'
In file included from /usr/include/c++/8/ostream:696,
from /usr/include/c++/8/istream:39,
from /usr/include/c++/8/sstream:38,
from /usr/include/c++/8/complex:45,
from /usr/include/c++/8/ccomplex:39,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:52,
from c.cc:1:
/usr/include/c++/8/bits/ostream.tcc:91: note: candidate:
'std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,
_Traits>::operator<<(short int) [with _CharT = char; _Traits =
std::char_traits<char>]'
/usr/include/c++/8/bits/ostream.tcc:91: note: no known conversion for
argument 1 from 'std::vector<int>' to 'short int'
In file included from /usr/include/c++/8/istream:39,
from /usr/include/c++/8/sstream:38,
from /usr/include/c++/8/complex:45,
from /usr/include/c++/8/ccomplex:39,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:52,
from c.cc:1:
/usr/include/c++/8/ostream:181: note: candidate: 'std::basic_ostream<_CharT,
_Traits>::__ostream_type& std::basic_ostream<_CharT,
_Traits>::operator<<(short unsigned int) [with _CharT = char; _Traits =
std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type
= std::basic_ostream<char>]'
/usr/include/c++/8/ostream:181: note: no known conversion for argument 1 from
'std::vector<int>' to 'short unsigned int'
In file included from /usr/include/c++/8/ostream:696,
from /usr/include/c++/8/istream:39,
from /usr/include/c++/8/sstream:38,
from /usr/include/c++/8/complex:45,
from /usr/include/c++/8/ccomplex:39,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:52,
from c.cc:1:
/usr/include/c++/8/bits/ostream.tcc:105: note: candidate:
'std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,
_Traits>::operator<<(int) [with _CharT = char; _Traits =
std::char_traits<char>]'
/usr/include/c++/8/bits/ostream.tcc:105: note: no known conversion for
argument 1 from 'std::vector<int>' to 'int'
In file included from /usr/include/c++/8/istream:39,
from /usr/include/c++/8/sstream:38,
from /usr/include/c++/8/complex:45,
from /usr/include/c++/8/ccomplex:39,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:52,
from c.cc:1:
/usr/include/c++/8/ostream:192: note: candidate: 'std::basic_ostream<_CharT,
_Traits>::__ostream_type& std::basic_ostream<_CharT,
_Traits>::operator<<(unsigned int) [with _CharT = char; _Traits =
std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type
= std::basic_ostream<char>]'
/usr/include/c++/8/ostream:192: note: no known conversion for argument 1 from
'std::vector<int>' to 'unsigned int'
/usr/include/c++/8/ostream:201: note: candidate: 'std::basic_ostream<_CharT,
_Traits>::__ostream_type& std::basic_ostream<_CharT,
_Traits>::operator<<(long long int) [with _CharT = char; _Traits =
std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type
= std::basic_ostream<char>]'
/usr/include/c++/8/ostream:201: note: no known conversion for argument 1 from
'std::vector<int>' to 'long long int'
/usr/include/c++/8/ostream:205: note: candidate: 'std::basic_ostream<_CharT,
_Traits>::__ostream_type& std::basic_ostream<_CharT,
_Traits>::operator<<(long long unsigned int) [with _CharT = char; _Traits =
std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type
= std::basic_ostream<char>]'
/usr/include/c++/8/ostream:205: note: no known conversion for argument 1 from
'std::vector<int>' to 'long long unsigned int'
/usr/include/c++/8/ostream:220: note: candidate: 'std::basic_ostream<_CharT,
_Traits>::__ostream_type& std::basic_ostream<_CharT,
_Traits>::operator<<(double) [with _CharT = char; _Traits =
std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type
= std::basic_ostream<char>]'
/usr/include/c++/8/ostream:220: note: no known conversion for argument 1 from
'std::vector<int>' to 'double'
/usr/include/c++/8/ostream:224: note: candidate: 'std::basic_ostream<_CharT,
_Traits>::__ostream_type& std::basic_ostream<_CharT,
_Traits>::operator<<(float) [with _CharT = char; _Traits =
std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type
= std::basic_ostream<char>]'
/usr/include/c++/8/ostream:224: note: no known conversion for argument 1 from
'std::vector<int>' to 'float'
/usr/include/c++/8/ostream:232: note: candidate: 'std::basic_ostream<_CharT,
_Traits>::__ostream_type& std::basic_ostream<_CharT,
_Traits>::operator<<(long double) [with _CharT = char; _Traits =
std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type
= std::basic_ostream<char>]'
/usr/include/c++/8/ostream:232: note: no known conversion for argument 1 from
'std::vector<int>' to 'long double'
/usr/include/c++/8/ostream:245: note: candidate: 'std::basic_ostream<_CharT,
_Traits>::__ostream_type& std::basic_ostream<_CharT,
_Traits>::operator<<(const void*) [with _CharT = char; _Traits =
std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type
= std::basic_ostream<char>]'
/usr/include/c++/8/ostream:245: note: no known conversion for argument 1 from
'std::vector<int>' to 'const void*'
In file included from /usr/include/c++/8/ostream:696,
from /usr/include/c++/8/istream:39,
from /usr/include/c++/8/sstream:38,
from /usr/include/c++/8/complex:45,
from /usr/include/c++/8/ccomplex:39,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:52,
from c.cc:1:
/usr/include/c++/8/bits/ostream.tcc:119: note: candidate:
'std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,
_Traits>::operator<<(std::basic_ostream<_CharT, _Traits>::__streambuf_type*)
[with _CharT = char; _Traits = std::char_traits<char>;
std::basic_ostream<_CharT, _Traits>::__streambuf_type =
std::basic_streambuf<char>]'
/usr/include/c++/8/bits/ostream.tcc:119: note: no known conversion for
argument 1 from 'std::vector<int>' to
'std::basic_ostream<char>::__streambuf_type*' {aka
'std::basic_streambuf<char>*'}
In file included from /usr/include/c++/8/regex:62,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:110,
from c.cc:1:
/usr/include/c++/8/bits/regex.h:1523: 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 std::__cxx11::sub_match<_Bi_iter>&)'
/usr/include/c++/8/bits/regex.h:1523: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::__cxx11::sub_match<_Bi_iter>'
In file included from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:45,
from c.cc:1:
/usr/include/c++/8/cstddef:124: note: candidate: 'template<class _IntegerType>
constexpr std::__byte_op_t<_IntegerType> std::operator<<(std::byte,
_IntegerType)'
/usr/include/c++/8/cstddef:124: note: template argument
deduction/substitution failed:
c.cc:2: note: cannot convert 'std::cout' (type 'std::ostream' {aka
'std::basic_ostream<char>'}) to type 'std::byte'
In file included from /usr/include/c++/8/bits/basic_string.h:48,
from /usr/include/c++/8/string:52,
from /usr/include/c++/8/bits/locale_classes.h:40,
from /usr/include/c++/8/bits/ios_base.h:41,
from /usr/include/c++/8/ios:42,
from /usr/include/c++/8/istream:38,
from /usr/include/c++/8/sstream:38,
from /usr/include/c++/8/complex:45,
from /usr/include/c++/8/ccomplex:39,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:52,
from c.cc:1:
/usr/include/c++/8/string_view:545: 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>)'
/usr/include/c++/8/string_view:545: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from
'std::basic_string_view<_CharT, _Traits>'
In file included from /usr/include/c++/8/string:52,
from /usr/include/c++/8/bits/locale_classes.h:40,
from /usr/include/c++/8/bits/ios_base.h:41,
from /usr/include/c++/8/ios:42,
from /usr/include/c++/8/istream:38,
from /usr/include/c++/8/sstream:38,
from /usr/include/c++/8/complex:45,
from /usr/include/c++/8/ccomplex:39,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:52,
from c.cc:1:
/usr/include/c++/8/bits/basic_string.h:6323: 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>&)'
/usr/include/c++/8/bits/basic_string.h:6323: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
In file included from /usr/include/c++/8/bits/ios_base.h:46,
from /usr/include/c++/8/ios:42,
from /usr/include/c++/8/istream:38,
from /usr/include/c++/8/sstream:38,
from /usr/include/c++/8/complex:45,
from /usr/include/c++/8/ccomplex:39,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:52,
from c.cc:1:
/usr/include/c++/8/system_error:217: note: candidate: 'template<class _CharT,
class _Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, const
std::error_code&)'
/usr/include/c++/8/system_error:217: note: template argument
deduction/substitution failed:
c.cc:2: note: cannot convert 'v' (type 'std::vector<int>') to type 'const
std::error_code&'
In file included from /usr/include/c++/8/istream:39,
from /usr/include/c++/8/sstream:38,
from /usr/include/c++/8/complex:45,
from /usr/include/c++/8/ccomplex:39,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:52,
from c.cc:1:
/usr/include/c++/8/ostream:500: note: candidate: 'template<class _CharT, class
_Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, _CharT)'
/usr/include/c++/8/ostream:500: note: template argument
deduction/substitution failed:
c.cc:2: note: deduced conflicting types for parameter '_CharT' ('char' and
'std::vector<int>')
In file included from /usr/include/c++/8/istream:39,
from /usr/include/c++/8/sstream:38,
from /usr/include/c++/8/complex:45,
from /usr/include/c++/8/ccomplex:39,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:52,
from c.cc:1:
/usr/include/c++/8/ostream:505: note: candidate: 'template<class _CharT, class
_Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, char)'
/usr/include/c++/8/ostream:505: note: template argument
deduction/substitution failed:
c.cc:2: note: cannot convert 'v' (type 'std::vector<int>') to type 'char'
In file included from /usr/include/c++/8/istream:39,
from /usr/include/c++/8/sstream:38,
from /usr/include/c++/8/complex:45,
from /usr/include/c++/8/ccomplex:39,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:52,
from c.cc:1:
/usr/include/c++/8/ostream:511: note: candidate: 'template<class _Traits>
std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char,
_Traits>&, char)'
/usr/include/c++/8/ostream:511: note: template argument
deduction/substitution failed:
c.cc:2: note: cannot convert 'v' (type 'std::vector<int>') to type 'char'
In file included from /usr/include/c++/8/istream:39,
from /usr/include/c++/8/sstream:38,
from /usr/include/c++/8/complex:45,
from /usr/include/c++/8/ccomplex:39,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:52,
from c.cc:1:
/usr/include/c++/8/ostream:517: note: candidate: 'template<class _Traits>
std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char,
_Traits>&, signed char)'
/usr/include/c++/8/ostream:517: note: template argument
deduction/substitution failed:
c.cc:2: note: cannot convert 'v' (type 'std::vector<int>') to type 'signed
char'
In file included from /usr/include/c++/8/istream:39,
from /usr/include/c++/8/sstream:38,
from /usr/include/c++/8/complex:45,
from /usr/include/c++/8/ccomplex:39,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:52,
from c.cc:1:
/usr/include/c++/8/ostream:522: note: candidate: 'template<class _Traits>
std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char,
_Traits>&, unsigned char)'
/usr/include/c++/8/ostream:522: note: template argument
deduction/substitution failed:
c.cc:2: note: cannot convert 'v' (type 'std::vector<int>') to type 'unsigned
char'
In file included from /usr/include/c++/8/istream:39,
from /usr/include/c++/8/sstream:38,
from /usr/include/c++/8/complex:45,
from /usr/include/c++/8/ccomplex:39,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:52,
from c.cc:1:
/usr/include/c++/8/ostream:542: note: candidate: 'template<class _CharT, class
_Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, const _CharT*)'
/usr/include/c++/8/ostream:542: note: template argument
deduction/substitution failed:
c.cc:2: note: mismatched types 'const _CharT*' and 'std::vector<int>'
In file included from /usr/include/c++/8/ostream:696,
from /usr/include/c++/8/istream:39,
from /usr/include/c++/8/sstream:38,
from /usr/include/c++/8/complex:45,
from /usr/include/c++/8/ccomplex:39,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:52,
from c.cc:1:
/usr/include/c++/8/bits/ostream.tcc:321: note: candidate: 'template<class
_CharT, class _Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, const char*)'
/usr/include/c++/8/bits/ostream.tcc:321: note: template argument
deduction/substitution failed:
c.cc:2: note: cannot convert 'v' (type 'std::vector<int>') to type 'const
char*'
In file included from /usr/include/c++/8/istream:39,
from /usr/include/c++/8/sstream:38,
from /usr/include/c++/8/complex:45,
from /usr/include/c++/8/ccomplex:39,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:52,
from c.cc:1:
/usr/include/c++/8/ostream:559: note: candidate: 'template<class _Traits>
std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char,
_Traits>&, const char*)'
/usr/include/c++/8/ostream:559: note: template argument
deduction/substitution failed:
c.cc:2: note: cannot convert 'v' (type 'std::vector<int>') to type 'const
char*'
In file included from /usr/include/c++/8/istream:39,
from /usr/include/c++/8/sstream:38,
from /usr/include/c++/8/complex:45,
from /usr/include/c++/8/ccomplex:39,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:52,
from c.cc:1:
/usr/include/c++/8/ostream:572: note: candidate: 'template<class _Traits>
std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char,
_Traits>&, const signed char*)'
/usr/include/c++/8/ostream:572: note: template argument
deduction/substitution failed:
c.cc:2: note: cannot convert 'v' (type 'std::vector<int>') to type 'const
signed char*'
In file included from /usr/include/c++/8/istream:39,
from /usr/include/c++/8/sstream:38,
from /usr/include/c++/8/complex:45,
from /usr/include/c++/8/ccomplex:39,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:52,
from c.cc:1:
/usr/include/c++/8/ostream:577: note: candidate: 'template<class _Traits>
std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char,
_Traits>&, const unsigned char*)'
/usr/include/c++/8/ostream:577: note: template argument
deduction/substitution failed:
c.cc:2: note: cannot convert 'v' (type 'std::vector<int>') to type 'const
unsigned char*'
In file included from /usr/include/c++/8/istream:39,
from /usr/include/c++/8/sstream:38,
from /usr/include/c++/8/complex:45,
from /usr/include/c++/8/ccomplex:39,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:52,
from c.cc:1:
/usr/include/c++/8/ostream:685: 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&)'
/usr/include/c++/8/ostream:685: note: template argument
deduction/substitution failed:
/usr/include/c++/8/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 = std::vector<int>]':
c.cc:2: required from here
/usr/include/c++/8/ostream:685: error: no type named 'type' in 'struct
std::enable_if<false, std::basic_ostream<char>&>'
In file included from /usr/include/c++/8/ccomplex:39,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:52,
from c.cc:1:
/usr/include/c++/8/complex:547: note: candidate: 'template<class _Tp, class
_CharT, class _Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, const
std::complex<_Tp>&)'
/usr/include/c++/8/complex:547: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::complex<_Tp>'
In file included from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:66,
from c.cc:1:
/usr/include/c++/8/bitset:1534: note: candidate: 'template<class _CharT, class
_Traits, long unsigned int _Nb> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, const
std::bitset<_Nb>&)'
/usr/include/c++/8/bitset:1534: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const std::bitset<_Nb>'
In file included from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:72,
from c.cc:1:
/usr/include/c++/8/iomanip:79: note: candidate: 'template<class _CharT, class
_Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Resetiosflags)'
/usr/include/c++/8/iomanip:79: note: template argument deduction/substitution
failed:
c.cc:2: note: cannot convert 'v' (type 'std::vector<int>') to type
'std::_Resetiosflags'
In file included from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:72,
from c.cc:1:
/usr/include/c++/8/iomanip:109: note: candidate: 'template<class _CharT, class
_Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Setiosflags)'
/usr/include/c++/8/iomanip:109: note: template argument
deduction/substitution failed:
c.cc:2: note: cannot convert 'v' (type 'std::vector<int>') to type
'std::_Setiosflags'
In file included from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:72,
from c.cc:1:
/usr/include/c++/8/iomanip:143: note: candidate: 'template<class _CharT, class
_Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Setbase)'
/usr/include/c++/8/iomanip:143: note: template argument
deduction/substitution failed:
c.cc:2: note: cannot convert 'v' (type 'std::vector<int>') to type
'std::_Setbase'
In file included from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:72,
from c.cc:1:
/usr/include/c++/8/iomanip:178: note: candidate: 'template<class _CharT, class
_Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&,
std::_Setfill<_CharT>)'
/usr/include/c++/8/iomanip:178: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'std::_Setfill<_CharT>'
In file included from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:72,
from c.cc:1:
/usr/include/c++/8/iomanip:208: note: candidate: 'template<class _CharT, class
_Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Setprecision)'
/usr/include/c++/8/iomanip:208: note: template argument
deduction/substitution failed:
c.cc:2: note: cannot convert 'v' (type 'std::vector<int>') to type
'std::_Setprecision'
In file included from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:72,
from c.cc:1:
/usr/include/c++/8/iomanip:238: note: candidate: 'template<class _CharT, class
_Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Setw)'
/usr/include/c++/8/iomanip:238: note: template argument
deduction/substitution failed:
c.cc:2: note: cannot convert 'v' (type 'std::vector<int>') to type
'std::_Setw'
In file included from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:72,
from c.cc:1:
/usr/include/c++/8/iomanip:311: note: candidate: 'template<class _CharT, class
_Traits, class _MoneyT> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&,
std::_Put_money<_MoneyT>)'
/usr/include/c++/8/iomanip:311: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from
'std::_Put_money<_MoneyT>'
In file included from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:72,
from c.cc:1:
/usr/include/c++/8/iomanip:363: note: candidate: 'template<class _CharT, class
_Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&,
std::_Put_time<_CharT>)'
/usr/include/c++/8/iomanip:363: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'std::_Put_time<_CharT>'
In file included from /usr/include/c++/8/memory:81,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:82,
from c.cc:1:
/usr/include/c++/8/bits/shared_ptr.h:66: note: candidate: 'template<class _Ch,
class _Tr, class _Tp, __gnu_cxx::_Lock_policy _Lp>
std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, const
std::__shared_ptr<_Tp, _Lp>&)'
/usr/include/c++/8/bits/shared_ptr.h:66: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::__shared_ptr<_Tp, _Lp>'
In file included from /usr/include/c++/8/valarray:592,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:95,
from c.cc:1:
/usr/include/c++/8/bits/valarray_after.h:410: note: candidate: 'template<class
_Dom1, class _Dom2> std::_Expr<std::_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 std::_Expr<_Dom1,
typename _Dom1::value_type>&, const std::_Expr<_Dom2, typename
_Dom2::value_type>&)'
/usr/include/c++/8/bits/valarray_after.h:410: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::ostream' {aka 'std::basic_ostream<char>'} is not derived
from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
In file included from /usr/include/c++/8/valarray:592,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:95,
from c.cc:1:
/usr/include/c++/8/bits/valarray_after.h:410: note: candidate: 'template<class
_Dom> std::_Expr<std::_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 std::_Expr<_Dom1, typename _Dom1::value_type>&, const
typename _Dom::value_type&)'
/usr/include/c++/8/bits/valarray_after.h:410: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::ostream' {aka 'std::basic_ostream<char>'} is not derived
from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
In file included from /usr/include/c++/8/valarray:592,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:95,
from c.cc:1:
/usr/include/c++/8/bits/valarray_after.h:410: note: candidate: 'template<class
_Dom> std::_Expr<std::_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 std::_Expr<_Dom1,
typename _Dom1::value_type>&)'
/usr/include/c++/8/bits/valarray_after.h:410: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const std::_Expr<_Dom1,
typename _Dom1::value_type>'
In file included from /usr/include/c++/8/valarray:592,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:95,
from c.cc:1:
/usr/include/c++/8/bits/valarray_after.h:410: note: candidate: 'template<class
_Dom> std::_Expr<std::_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 std::_Expr<_Dom1, typename _Dom1::value_type>&, const
std::valarray<typename _Dom::value_type>&)'
/usr/include/c++/8/bits/valarray_after.h:410: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::ostream' {aka 'std::basic_ostream<char>'} is not derived
from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
In file included from /usr/include/c++/8/valarray:592,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:95,
from c.cc:1:
/usr/include/c++/8/bits/valarray_after.h:410: note: candidate: 'template<class
_Dom> std::_Expr<std::_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 std::valarray<typename _Dom::value_type>&, const
std::_Expr<_Dom1, typename _Dom1::value_type>&)'
/usr/include/c++/8/bits/valarray_after.h:410: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const std::_Expr<_Dom1,
typename _Dom1::value_type>'
In file included from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:95,
from c.cc:1:
/usr/include/c++/8/valarray:1180: note: candidate: 'template<class _Tp>
std::_Expr<std::_BinClos<std::__shift_left, std::_ValArray, std::_ValArray,
_Tp, _Tp>, typename std::__fun<std::__shift_left, _Tp>::result_type>
std::operator<<(const std::valarray<_Tp>&, const std::valarray<_Tp>&)'
/usr/include/c++/8/valarray:1180: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::ostream' {aka 'std::basic_ostream<char>'} is not derived
from 'const std::valarray<_Tp>'
In file included from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:95,
from c.cc:1:
/usr/include/c++/8/valarray:1180: note: candidate: 'template<class _Tp>
std::_Expr<std::_BinClos<std::__shift_left, std::_ValArray, std::_Constant,
_Tp, _Tp>, typename std::__fun<std::__shift_left, _Tp>::result_type>
std::operator<<(const std::valarray<_Tp>&, const _Tp&)'
/usr/include/c++/8/valarray:1180: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::ostream' {aka 'std::basic_ostream<char>'} is not derived
from 'const std::valarray<_Tp>'
In file included from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:95,
from c.cc:1:
/usr/include/c++/8/valarray:1180: note: candidate: 'template<class _Tp>
std::_Expr<std::_BinClos<std::__shift_left, std::_Constant, std::_ValArray,
_Tp, _Tp>, typename std::__fun<std::__shift_left, _Tp>::result_type>
std::operator<<(const _Tp&, const std::valarray<_Tp>&)'
/usr/include/c++/8/valarray:1180: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::valarray<_Tp>'
In file included from /usr/include/c++/8/future:39,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:105,
from c.cc:1:
/usr/include/c++/8/thread:323: note: candidate: 'template<class _CharT, class
_Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::thread::id)'
/usr/include/c++/8/thread:323: note: template argument deduction/substitution
failed:
c.cc:2: note: cannot convert 'v' (type 'std::vector<int>') to type
'std::thread::id'
In file included from /usr/include/c++/8/random:49,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:108,
from c.cc:1:
/usr/include/c++/8/bits/random.h:1262: note: candidate: 'template<class
_RandomNumberEngine, long unsigned int __w, class _UIntType, class _CharT,
class _Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, const
std::independent_bits_engine<_RandomNumberEngine, __w, _UIntType>&)'
/usr/include/c++/8/bits/random.h:1262: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::independent_bits_engine<_RandomNumberEngine, __w, _UIntType>'
In file included from /usr/include/c++/8/random:51,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:108,
from c.cc:1:
/usr/include/c++/8/bits/random.tcc:874: note: candidate: 'template<class
_IntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, const
std::uniform_int_distribution<_IntType>&)'
/usr/include/c++/8/bits/random.tcc:874: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::uniform_int_distribution<_IntType>'
In file included from /usr/include/c++/8/random:51,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:108,
from c.cc:1:
/usr/include/c++/8/bits/random.tcc:933: note: candidate: 'template<class
_RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, const
std::uniform_real_distribution<_IntType>&)'
/usr/include/c++/8/bits/random.tcc:933: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::uniform_real_distribution<_IntType>'
In file included from /usr/include/c++/8/random:51,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:108,
from c.cc:1:
/usr/include/c++/8/bits/random.tcc:2126: note: candidate: 'template<class
_RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, const
std::cauchy_distribution<_RealType>&)'
/usr/include/c++/8/bits/random.tcc:2126: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::cauchy_distribution<_RealType>'
In file included from /usr/include/c++/8/random:51,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:108,
from c.cc:1:
/usr/include/c++/8/bits/random.tcc:995: note: candidate: 'template<class
_CharT, class _Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, const
std::bernoulli_distribution&)'
/usr/include/c++/8/bits/random.tcc:995: note: template argument
deduction/substitution failed:
c.cc:2: note: cannot convert 'v' (type 'std::vector<int>') to type 'const
std::bernoulli_distribution&'
In file included from /usr/include/c++/8/random:51,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:108,
from c.cc:1:
/usr/include/c++/8/bits/random.tcc:1077: note: candidate: 'template<class
_IntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, const
std::geometric_distribution<_IntType>&)'
/usr/include/c++/8/bits/random.tcc:1077: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::geometric_distribution<_IntType>'
In file included from /usr/include/c++/8/random:51,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:108,
from c.cc:1:
/usr/include/c++/8/bits/random.tcc:1734: note: candidate: 'template<class
_RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, const
std::exponential_distribution<_RealType>&)'
/usr/include/c++/8/bits/random.tcc:1734: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::exponential_distribution<_RealType>'
In file included from /usr/include/c++/8/random:51,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:108,
from c.cc:1:
/usr/include/c++/8/bits/random.tcc:2525: note: candidate: 'template<class
_RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, const
std::weibull_distribution<_RealType>&)'
/usr/include/c++/8/bits/random.tcc:2525: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::weibull_distribution<_RealType>'
In file included from /usr/include/c++/8/random:51,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:108,
from c.cc:1:
/usr/include/c++/8/bits/random.tcc:2601: note: candidate: 'template<class
_RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, const
std::extreme_value_distribution<_RealType>&)'
/usr/include/c++/8/bits/random.tcc:2601: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::extreme_value_distribution<_RealType>'
In file included from /usr/include/c++/8/random:51,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:108,
from c.cc:1:
/usr/include/c++/8/bits/random.tcc:153: note: candidate: 'template<class
_UIntType, _UIntType __a, _UIntType __c, _UIntType __m, class _CharT, class
_Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, const
std::linear_congruential_engine<_UIntType, __a, __c, __m>&)'
/usr/include/c++/8/bits/random.tcc:153: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::linear_congruential_engine<_UIntType, __a, __c, __m>'
In file included from /usr/include/c++/8/random:51,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:108,
from c.cc:1:
/usr/include/c++/8/bits/random.tcc:474: 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<<(std::basic_ostream<_CharT, _Traits>&, const
std::mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d,
__s, __b, __t, __c, __l, __f>&)'
/usr/include/c++/8/bits/random.tcc:474: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d,
__s, __b, __t, __c, __l, __f>'
In file included from /usr/include/c++/8/random:51,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:108,
from c.cc:1:
/usr/include/c++/8/bits/random.tcc:629: 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<<(std::basic_ostream<_CharT, _Traits>&, const
std::subtract_with_carry_engine<_UIntType, __w, __s, __r>&)'
/usr/include/c++/8/bits/random.tcc:629: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::subtract_with_carry_engine<_UIntType, __w, __s, __r>'
In file included from /usr/include/c++/8/random:51,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:108,
from c.cc:1:
/usr/include/c++/8/bits/random.tcc:699: note: candidate: 'template<class
_RandomNumberEngine, long unsigned int __p, long unsigned int __r, class
_CharT, class _Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, const
std::discard_block_engine<_RandomNumberEngine, __p, __r>&)'
/usr/include/c++/8/bits/random.tcc:699: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::discard_block_engine<_RandomNumberEngine, __p, __r>'
In file included from /usr/include/c++/8/random:51,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:108,
from c.cc:1:
/usr/include/c++/8/bits/random.tcc:828: note: candidate: 'template<class
_RandomNumberEngine, long unsigned int __k, class _CharT, class _Traits>
std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, const
std::shuffle_order_engine<_RandomNumberEngine, __k>&)'
/usr/include/c++/8/bits/random.tcc:828: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::shuffle_order_engine<_RandomNumberEngine, __k>'
In file included from /usr/include/c++/8/random:51,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:108,
from c.cc:1:
/usr/include/c++/8/bits/random.tcc:1192: note: candidate: 'template<class
_IntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, const
std::negative_binomial_distribution<_IntType>&)'
/usr/include/c++/8/bits/random.tcc:1192: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::negative_binomial_distribution<_IntType>'
In file included from /usr/include/c++/8/random:51,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:108,
from c.cc:1:
/usr/include/c++/8/bits/random.tcc:1403: note: candidate: 'template<class
_IntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, const
std::poisson_distribution<_IntType>&)'
/usr/include/c++/8/bits/random.tcc:1403: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::poisson_distribution<_IntType>'
In file included from /usr/include/c++/8/random:51,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:108,
from c.cc:1:
/usr/include/c++/8/bits/random.tcc:1670: note: candidate: 'template<class
_IntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, const
std::binomial_distribution<_IntType>&)'
/usr/include/c++/8/bits/random.tcc:1670: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::binomial_distribution<_IntType>'
In file included from /usr/include/c++/8/random:51,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:108,
from c.cc:1:
/usr/include/c++/8/bits/random.tcc:1901: note: candidate: 'template<class
_RealType1, class _CharT, class _Traits> std::basic_ostream<_CharT,
_Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const
std::normal_distribution<_RealType>&)'
/usr/include/c++/8/bits/random.tcc:1901: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::normal_distribution<_RealType>'
In file included from /usr/include/c++/8/random:51,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:108,
from c.cc:1:
/usr/include/c++/8/bits/random.tcc:1966: note: candidate: 'template<class
_RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, const
std::lognormal_distribution<_RealType>&)'
/usr/include/c++/8/bits/random.tcc:1966: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::lognormal_distribution<_RealType>'
In file included from /usr/include/c++/8/random:51,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:108,
from c.cc:1:
/usr/include/c++/8/bits/random.tcc:2039: note: candidate: 'template<class
_RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, const
std::chi_squared_distribution<_RealType>&)'
/usr/include/c++/8/bits/random.tcc:2039: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::chi_squared_distribution<_RealType>'
In file included from /usr/include/c++/8/random:51,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:108,
from c.cc:1:
/usr/include/c++/8/bits/random.tcc:2203: note: candidate: 'template<class
_RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, const
std::fisher_f_distribution<_RealType>&)'
/usr/include/c++/8/bits/random.tcc:2203: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::fisher_f_distribution<_RealType>'
In file included from /usr/include/c++/8/random:51,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:108,
from c.cc:1:
/usr/include/c++/8/bits/random.tcc:2278: note: candidate: 'template<class
_RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, const
std::student_t_distribution<_RealType>&)'
/usr/include/c++/8/bits/random.tcc:2278: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::student_t_distribution<_RealType>'
In file included from /usr/include/c++/8/random:51,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:108,
from c.cc:1:
/usr/include/c++/8/bits/random.tcc:2447: note: candidate: 'template<class
_RealType1, class _CharT, class _Traits> std::basic_ostream<_CharT,
_Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const
std::gamma_distribution<_RealType>&)'
/usr/include/c++/8/bits/random.tcc:2447: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::gamma_distribution<_RealType>'
In file included from /usr/include/c++/8/random:51,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:108,
from c.cc:1:
/usr/include/c++/8/bits/random.tcc:2737: note: candidate: 'template<class
_IntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, const
std::discrete_distribution<_IntType>&)'
/usr/include/c++/8/bits/random.tcc:2737: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::discrete_distribution<_IntType>'
In file included from /usr/include/c++/8/random:51,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:108,
from c.cc:1:
/usr/include/c++/8/bits/random.tcc:2947: note: candidate: 'template<class
_RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, const
std::piecewise_constant_distribution<_RealType>&)'
/usr/include/c++/8/bits/random.tcc:2947: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::piecewise_constant_distribution<_RealType>'
In file included from /usr/include/c++/8/random:51,
from /usr/include/c++/8/x86_64-redhat-linux/bits/stdc++.h:108,
from c.cc:1:
/usr/include/c++/8/bits/random.tcc:3163: note: candidate: 'template<class
_RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&, const
std::piecewise_linear_distribution<_RealType>&)'
/usr/include/c++/8/bits/random.tcc:3163: note: template argument
deduction/substitution failed:
c.cc:2: note: 'std::vector<int>' is not derived from 'const
std::piecewise_linear_distribution<_RealType>'
Options
On the other hand, -Wfatal-errors makes it all stop:
vector<int> v;
cout << v;
c.cc:2: error: no match for 'operator<<' in 'std::cout << v' (operand types are
'std::ostream' {aka 'std::basic_ostream<char>'} and 'std::vector<int>')
#1
This works:
stringstream ss;
ss << 42;
cout << "It is " << ss.str() << '\n';
It is 42
Why does this fail?
stringstream ss;
cout << "It is " << (ss << 42).str() << '\n';
c.cc:2: error: 'class std::basic_ostream<char>' has no member named 'str'
Go nuts and read the error message. The entire message.
#2
vector<int> x;
x.pushback(3);
c.cc:2: error: 'class std::vector<int>' has no member named 'pushback'; did you
mean 'push_back'?
Well, that used to be difficult, until g++ started
doing spelling correction.
#3
class Foo {
public:
int n;
};
ostream &operator>>(ostream &os, const Foo &f) {
return os << f.n;
}
int main() {
Foo bar;
cout << bar;
}
c.cc:12: error: no match for 'operator<<' in 'std::cout << bar' (operand types
are 'std::ostream' {aka 'std::basic_ostream<char>'} and 'Foo')
#4
class Foo {
public:
int n;
};
ostream &operator<<(ostream os, const Foo &f) {
return os << f.n;
}
int main() {
Foo bar;
cout << bar;
}
c.cc:12: error: use of deleted function 'std::basic_ostream<_CharT,
_Traits>::basic_ostream(const std::basic_ostream<_CharT, _Traits>&) [with
_CharT = char; _Traits = std::char_traits<char>]'