Language
C++
Compiler
gcc HEAD 12.0.0 20210721 (experimental)
Options
Warnings
Optimization
Boost 1.73.0
C++2b
no pedantic
$ g++ prog.cc -Wall -Wextra -O2 -march=native -I/opt/wandbox/boost-1.73.0/gcc-head/include -std=c++2b Exit Code:
1
Author
anonymous
over 3 years ago
C++
gcc HEAD 12.0.0 20210721 (experimental)
Author
anonymous
over 3 years ago
$ g++ prog.cc -Wall -Wextra -O2 -march=native -I/opt/wandbox/boost-1.73.0/gcc-head/include -std=c++2b prog.cc: In function 'int main()':
prog.cc:13:7: error: use of deleted function 'U::U()'
13 | U tmp;
| ^~~
prog.cc:7:7: note: 'U::U()' is implicitly deleted because the default definition would be ill-formed:
7 | union U {
| ^
prog.cc:9:19: error: union member 'U::value' with non-trivial 'non_trivially::non_trivially()'
9 | non_trivially value;
| ^~~~~
prog.cc:13:7: warning: unused variable 'tmp' [-Wunused-variable]
13 | U tmp;
| ^~~