Wandbox

Ran/Viewed Log

Author

anonymous

about 4 years ago

Language

C++

Compiler

gcc HEAD 11.0.1 20210317 (experimental)

Options

Warnings

Boost 1.73.0

C++2b(GNU)

no pedantic

Author

anonymous

about 4 years ago

$ g++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.73.0/gcc-head/include -std=gnu++2b

prog.cc: In function 'int main()':
prog.cc:8:25: error: cannot bind non-const lvalue reference of type 'bool&' to an rvalue of type 'bool'
    8 |   bool& non_const_ref = *iter;
      |                         ^~~~~
In file included from /opt/wandbox/gcc-head/include/c++/11.0.1/vector:68,
                 from prog.cc:1:
/opt/wandbox/gcc-head/include/c++/11.0.1/bits/stl_bvector.h:86:5: note:   after user-defined conversion: 'std::_Bit_reference::operator bool() const'
   86 |     operator bool() const _GLIBCXX_NOEXCEPT
      |     ^~~~~~~~
prog.cc:7:15: warning: unused variable 'const_ref' [-Wunused-variable]
    7 |   bool const& const_ref = *iter;
      |               ^~~~~~~~~
prog.cc:8:9: warning: unused variable 'non_const_ref' [-Wunused-variable]
    8 |   bool& non_const_ref = *iter;
      |         ^~~~~~~~~~~~~

Exit Code:

1