Language
C++
Compiler
gcc HEAD 11.0.0 20200917 (experimental)
Options
Warnings
Boost 1.73.0
C++2a
no pedantic
$ g++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.73.0/gcc-head/include -std=c++2a Exit Code:
0
C++
gcc HEAD 11.0.0 20200917 (experimental)
$ g++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.73.0/gcc-head/include -std=c++2a prog.cc: In function 'int main()':
prog.cc:7:10: warning: comparison of unsigned expression in '< 0' is always false [-Wtype-limits]
7 | if (u < 0) // C4296
| ~~^~~
prog.cc:9:10: warning: comparison of unsigned expression in '>= 0' is always true [-Wtype-limits]
9 | if (u >= 0) // C4296
| ~~^~~~