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Merge pull request #21 from dermojo/main
Issue #10: sources for "how to read template error messages"
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‎archive/2024-04-10/how_to_read_template_error_messages/How to read template error messages.key

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‎archive/2024-04-10/how_to_read_template_error_messages/How to read template error messages.pdf

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‎archive/2024-04-10/how_to_read_template_error_messages/additional/sample_sort.cpp

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#include <algorithm>
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#include <string>
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#include <vector>
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struct UserName
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{
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std::string name;
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};
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int main()
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{
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std::vector<UserName> users;
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std::sort(users.begin(), users.end());
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}

‎archive/2024-04-10/how_to_read_template_error_messages/additional/sample_sort.cpp_gcc13.log

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In file included from /opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_algobase.h:71,
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from /opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/algorithm:60,
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from <source>:1:
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/predefined_ops.h: In instantiation of 'constexpr bool __gnu_cxx::__ops::_Iter_less_iter::operator()(_Iterator1, _Iterator2) const [with _Iterator1 = __gnu_cxx::__normal_iterator<UserName*, std::vector<UserName> >; _Iterator2 = __gnu_cxx::__normal_iterator<UserName*, std::vector<UserName> >]':
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_algo.h:1819:14: required from 'void std::__insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<UserName*, vector<UserName> >; _Compare = __gnu_cxx::__ops::_Iter_less_iter]'
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_algo.h:1859:25: required from 'void std::__final_insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<UserName*, vector<UserName> >; _Compare = __gnu_cxx::__ops::_Iter_less_iter]'
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_algo.h:1950:31: required from 'void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<UserName*, vector<UserName> >; _Compare = __gnu_cxx::__ops::_Iter_less_iter]'
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_algo.h:4861:18: required from 'void std::sort(_RAIter, _RAIter) [with _RAIter = __gnu_cxx::__normal_iterator<UserName*, vector<UserName> >]'
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<source>:13:14: required from here
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/predefined_ops.h:45:23: error: no match for 'operator<' (operand types are 'UserName' and 'UserName')
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45 | { return *__it1 < *__it2; }
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| ~~~~~~~^~~~~~~~
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In file included from /opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_algobase.h:67:
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_iterator.h:1250:5: note: candidate: 'template<class _IteratorL, class _IteratorR, class _Container> bool __gnu_cxx::operator<(const __normal_iterator<_IteratorL, _Container>&, const __normal_iterator<_IteratorR, _Container>&)'
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1250 | operator<(const __normal_iterator<_IteratorL, _Container>& __lhs,
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| ^~~~~~~~
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_iterator.h:1250:5: note: template argument deduction/substitution failed:
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/predefined_ops.h:45:23: note: 'UserName' is not derived from 'const __gnu_cxx::__normal_iterator<_IteratorL, _Container>'
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45 | { return *__it1 < *__it2; }
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| ~~~~~~~^~~~~~~~
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_iterator.h:1258:5: note: candidate: 'template<class _Iterator, class _Container> bool __gnu_cxx::operator<(const __normal_iterator<_Iterator, _Container>&, const __normal_iterator<_Iterator, _Container>&)'
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1258 | operator<(const __normal_iterator<_Iterator, _Container>& __lhs,
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| ^~~~~~~~
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_iterator.h:1258:5: note: template argument deduction/substitution failed:
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/predefined_ops.h:45:23: note: 'UserName' is not derived from 'const __gnu_cxx::__normal_iterator<_Iterator, _Container>'
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45 | { return *__it1 < *__it2; }
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| ~~~~~~~^~~~~~~~
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/predefined_ops.h: In instantiation of 'bool __gnu_cxx::__ops::_Val_less_iter::operator()(_Value&, _Iterator) const [with _Value = UserName; _Iterator = __gnu_cxx::__normal_iterator<UserName*, std::vector<UserName> >]':
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_algo.h:1799:20: required from 'void std::__unguarded_linear_insert(_RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<UserName*, vector<UserName> >; _Compare = __gnu_cxx::__ops::_Val_less_iter]'
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_algo.h:1827:36: required from 'void std::__insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<UserName*, vector<UserName> >; _Compare = __gnu_cxx::__ops::_Iter_less_iter]'
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_algo.h:1859:25: required from 'void std::__final_insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<UserName*, vector<UserName> >; _Compare = __gnu_cxx::__ops::_Iter_less_iter]'
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_algo.h:1950:31: required from 'void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<UserName*, vector<UserName> >; _Compare = __gnu_cxx::__ops::_Iter_less_iter]'
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_algo.h:4861:18: required from 'void std::sort(_RAIter, _RAIter) [with _RAIter = __gnu_cxx::__normal_iterator<UserName*, vector<UserName> >]'
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<source>:13:14: required from here
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/predefined_ops.h:98:22: error: no match for 'operator<' (operand types are 'UserName' and 'UserName')
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98 | { return __val < *__it; }
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| ~~~~~~^~~~~~~
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_iterator.h:1250:5: note: candidate: 'template<class _IteratorL, class _IteratorR, class _Container> bool __gnu_cxx::operator<(const __normal_iterator<_IteratorL, _Container>&, const __normal_iterator<_IteratorR, _Container>&)'
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1250 | operator<(const __normal_iterator<_IteratorL, _Container>& __lhs,
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| ^~~~~~~~
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_iterator.h:1250:5: note: template argument deduction/substitution failed:
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/predefined_ops.h:98:22: note: 'UserName' is not derived from 'const __gnu_cxx::__normal_iterator<_IteratorL, _Container>'
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98 | { return __val < *__it; }
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| ~~~~~~^~~~~~~
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_iterator.h:1258:5: note: candidate: 'template<class _Iterator, class _Container> bool __gnu_cxx::operator<(const __normal_iterator<_Iterator, _Container>&, const __normal_iterator<_Iterator, _Container>&)'
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1258 | operator<(const __normal_iterator<_Iterator, _Container>& __lhs,
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| ^~~~~~~~
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_iterator.h:1258:5: note: template argument deduction/substitution failed:
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/predefined_ops.h:98:22: note: 'UserName' is not derived from 'const __gnu_cxx::__normal_iterator<_Iterator, _Container>'
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98 | { return __val < *__it; }
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| ~~~~~~^~~~~~~
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/predefined_ops.h: In instantiation of 'bool __gnu_cxx::__ops::_Iter_less_val::operator()(_Iterator, _Value&) const [with _Iterator = __gnu_cxx::__normal_iterator<UserName*, std::vector<UserName> >; _Value = UserName]':
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_heap.h:140:48: required from 'void std::__push_heap(_RandomAccessIterator, _Distance, _Distance, _Tp, _Compare&) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<UserName*, vector<UserName> >; _Distance = long int; _Tp = UserName; _Compare = __gnu_cxx::__ops::_Iter_less_val]'
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_heap.h:247:23: required from 'void std::__adjust_heap(_RandomAccessIterator, _Distance, _Distance, _Tp, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<UserName*, vector<UserName> >; _Distance = long int; _Tp = UserName; _Compare = __gnu_cxx::__ops::_Iter_less_iter]'
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_heap.h:356:22: required from 'void std::__make_heap(_RandomAccessIterator, _RandomAccessIterator, _Compare&) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<UserName*, vector<UserName> >; _Compare = __gnu_cxx::__ops::_Iter_less_iter]'
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_algo.h:1635:23: required from 'void std::__heap_select(_RandomAccessIterator, _RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<UserName*, vector<UserName> >; _Compare = __gnu_cxx::__ops::_Iter_less_iter]'
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_algo.h:1910:25: required from 'void std::__partial_sort(_RandomAccessIterator, _RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<UserName*, vector<UserName> >; _Compare = __gnu_cxx::__ops::_Iter_less_iter]'
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_algo.h:1926:27: required from 'void std::__introsort_loop(_RandomAccessIterator, _RandomAccessIterator, _Size, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<UserName*, vector<UserName> >; _Size = long int; _Compare = __gnu_cxx::__ops::_Iter_less_iter]'
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_algo.h:1947:25: required from 'void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<UserName*, vector<UserName> >; _Compare = __gnu_cxx::__ops::_Iter_less_iter]'
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_algo.h:4861:18: required from 'void std::sort(_RAIter, _RAIter) [with _RAIter = __gnu_cxx::__normal_iterator<UserName*, vector<UserName> >]'
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<source>:13:14: required from here
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/predefined_ops.h:69:22: error: no match for 'operator<' (operand types are 'UserName' and 'UserName')
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69 | { return *__it < __val; }
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| ~~~~~~^~~~~~~
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_iterator.h:1250:5: note: candidate: 'template<class _IteratorL, class _IteratorR, class _Container> bool __gnu_cxx::operator<(const __normal_iterator<_IteratorL, _Container>&, const __normal_iterator<_IteratorR, _Container>&)'
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1250 | operator<(const __normal_iterator<_IteratorL, _Container>& __lhs,
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| ^~~~~~~~
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_iterator.h:1250:5: note: template argument deduction/substitution failed:
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/predefined_ops.h:69:22: note: 'UserName' is not derived from 'const __gnu_cxx::__normal_iterator<_IteratorL, _Container>'
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69 | { return *__it < __val; }
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| ~~~~~~^~~~~~~
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_iterator.h:1258:5: note: candidate: 'template<class _Iterator, class _Container> bool __gnu_cxx::operator<(const __normal_iterator<_Iterator, _Container>&, const __normal_iterator<_Iterator, _Container>&)'
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1258 | operator<(const __normal_iterator<_Iterator, _Container>& __lhs,
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| ^~~~~~~~
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/stl_iterator.h:1258:5: note: template argument deduction/substitution failed:
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/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/predefined_ops.h:69:22: note: 'UserName' is not derived from 'const __gnu_cxx::__normal_iterator<_Iterator, _Container>'
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69 | { return *__it < __val; }
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| ~~~~~~^~~~~~~
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Compiler returned: 1

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