awson added a comment. Now, this
#include <vector> #include <ranges> auto drop1(const std::vector<int>& s){ return s | std::views::drop(1); } when compiled against gcc's-13.1 libstdc++ spits: boro.cpp:5:11: error: invalid operands to binary expression ('const std::vector<int>' and '_Partial<_Drop, decay_t<int>>' (aka '_Partial<std::ranges::views::_Drop, int>')) return s | std::views::drop(1); ~ ^ ~~~~~~~~~~~~~~~~~~~ C:\Progs\msys64\ucrt64\include\c++\13.1.0\cstddef:135:3: note: candidate function not viable: no known conversion from 'const std::vector<int>' to 'byte' for 1st argument operator|(byte __l, byte __r) noexcept ^ C:\Progs\msys64\ucrt64\include\c++\13.1.0\bits/ios_base.h:87:3: note: candidate function not viable: no known conversion from 'const std::vector<int>' to '_Ios_Fmtflags' for 1st argument operator|(_Ios_Fmtflags __a, _Ios_Fmtflags __b) ^ C:\Progs\msys64\ucrt64\include\c++\13.1.0\bits/ios_base.h:130:3: note: candidate function not viable: no known conversion from 'const std::vector<int>' to '_Ios_Openmode' for 1st argument operator|(_Ios_Openmode __a, _Ios_Openmode __b) ^ C:\Progs\msys64\ucrt64\include\c++\13.1.0\bits/ios_base.h:170:3: note: candidate function not viable: no known conversion from 'const std::vector<int>' to '_Ios_Iostate' for 1st argument operator|(_Ios_Iostate __a, _Ios_Iostate __b) ^ C:\Progs\msys64\ucrt64\include\c++\13.1.0\ranges:887:7: note: candidate template ignored: constraints not satisfied [with _Self = _Partial<_Drop, decay_t<int>>, _Range = const std::vector<int> &] operator|(_Range&& __r, _Self&& __self) ^ C:\Progs\msys64\ucrt64\include\c++\13.1.0\ranges:885:5: note: because '__adaptor_invocable<std::ranges::views::__adaptor::_Partial<std::ranges::views::_Drop, int>, const std::vector<int> &>' evaluated to false && __adaptor_invocable<_Self, _Range> ^ C:\Progs\msys64\ucrt64\include\c++\13.1.0\ranges:860:20: note: because 'std::declval<_Adaptor>()(declval<_Args>()...)' would be invalid: no matching function for call to object of type 'std::ranges::views::__adaptor::_Partial<std::ranges::views::_Drop, int>' = requires { std::declval<_Adaptor>()(declval<_Args>()...); }; ^ C:\Progs\msys64\ucrt64\include\c++\13.1.0\ranges:896:7: note: candidate template ignored: constraints not satisfied [with _Lhs = std::vector<int>, _Rhs = _Partial<_Drop, decay_t<int>>] operator|(_Lhs __lhs, _Rhs __rhs) ^ C:\Progs\msys64\ucrt64\include\c++\13.1.0\ranges:893:16: note: because 'derived_from<std::vector<int>, _RangeAdaptorClosure>' evaluated to false requires derived_from<_Lhs, _RangeAdaptorClosure> ^ C:\Progs\msys64\ucrt64\include\c++\13.1.0\concepts:67:28: note: because '__is_base_of(std::ranges::views::__adaptor::_RangeAdaptorClosure, std::vector<int>)' evaluated to false concept derived_from = __is_base_of(_Base, _Derived) ^ 1 error generated. `transform` doesn't work either. Repository: rG LLVM Github Monorepo CHANGES SINCE LAST ACTION https://reviews.llvm.org/D146178/new/ https://reviews.llvm.org/D146178 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits