error: invalid operands to binary expression ('std::ostream' (aka 'basic_ostream<char>') and 'const operations_research::sat::CpSolverResponse')

[yurivict]

What version of OR-Tools and what language are you using?
Version: 9.7

What operating system (Linux, Windows, ...) and version?
FreeBSD 13.2
clang-16

In file included from /usr/ports/math/or-tools/work/or-tools-9.7/ortools/constraint_solver/routing_constraints.cc:14:
In file included from /usr/ports/math/or-tools/work/or-tools-9.7/ortools/constraint_solver/routing_constraints.h:20:
In file included from /usr/ports/math/or-tools/work/or-tools-9.7/ortools/constraint_solver/constraint_solver.h:93:
In file included from /usr/ports/math/or-tools/work/or-tools-9.7/ortools/base/logging.h:23:
In file included from /usr/local/include/absl/log/check.h:37:
In file included from /usr/local/include/absl/log/internal/check_impl.h:19:
In file included from /usr/local/include/absl/log/internal/check_op.h:37:
In file included from /usr/local/include/absl/log/internal/strip.h:24:
/usr/local/include/absl/log/internal/log_message.h:289:17: error: invalid operands to binary expression ('std::ostream' (aka 'basic_ostream<char>') and 'const operations_research::sat::CpSolverResponse')
  view.stream() << log_internal::NullGuard<T>().Guard(v);
  ~~~~~~~~~~~~~ ^  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/ports/math/or-tools/work/or-tools-9.7/ortools/constraint_solver/routing_lp_scheduling.h:592:13: note: in instantiation of function template specialization 'absl::log_internal::LogMessage::operator<<<operations_research::sat::CpSolverResponse, 0>' requested here
    VLOG(2) << response_;
            ^                       
/usr/include/c++/v1/cstddef:125:3: note: candidate function template not viable: no known conversion from 'std::ostream' (aka 'basic_ostream<char>') to 'byte' for 1st argument
  operator<< (byte  __lhs, _Integer __shift) noexcept
  ^
/usr/include/c++/v1/__random/bernoulli_distribution.h:114:1: note: candidate function template not viable: no known conversion from 'const operations_research::sat::CpSolverResponse' to 'const bernoulli_distribution' for 2nd argument
operator<<(basic_ostream<_CharT, _Traits>& __os, const bernoulli_distribution& __x)
^
/usr/include/c++/v1/ostream:792:1: note: candidate function template not viable: no known conversion from 'const operations_research::sat::CpSolverResponse' to 'char' for 2nd argument
operator<<(basic_ostream<_CharT, _Traits>& __os, char __cn)
^
/usr/include/c++/v1/ostream:825:1: note: candidate function template not viable: no known conversion from 'const operations_research::sat::CpSolverResponse' to 'char' for 2nd argument
operator<<(basic_ostream<char, _Traits>& __os, char __c)
^
/usr/include/c++/v1/ostream:832:1: note: candidate function template not viable: no known conversion from 'const operations_research::sat::CpSolverResponse' to 'signed char' for 2nd argument

[lperron]

Strange. Still compiling in c++ 17 mode?

[yurivict]

Yes, in c++17 mode.

[lperron]

can you check protobuf is the latest version (24.4. I believe)

[lperron]

same for abseil. Everything need to be in lockstep

[Mizux]

For v9.7 we use:

or-tools/Dependencies.txt

Lines 1 to 2 in ed8db90

	Protobuf=v23.3
	abseil-cpp=20230125.3

or-tools/Dependencies.txt

Line 9 in ed8db90

Re2=2023-07-01

While on main/v9.8 we use:

or-tools/Dependencies.txt

Lines 1 to 2 in f7f79cd

	Protobuf=v24.4
	abseil-cpp=20230802.0

or-tools/Dependencies.txt

Line 9 in f7f79cd

Re2=2023-09-01

Could be related to issues in conda-forge/or-tools-feedstock#47
note: beware this PR was facing several issue due to re2, protobuf, abseil-cpp version mismatch