Language
C++
Compiler
gcc HEAD 11.0.0 20200918 (experimental)
Options
Warnings
Boost 1.73.0
C++2a(GNU)
-pedantic
$ g++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.73.0/gcc-head/include -std=gnu++2a -pedantic Exit Code:
0
C++
gcc HEAD 11.0.0 20200918 (experimental)
$ g++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.73.0/gcc-head/include -std=gnu++2a -pedantic prog.cc: In function 'int main()':
prog.cc:7:15: warning: self-comparison always evaluates to false [-Wtautological-compare]
7 | int l = (i != i,0); // C4547
| ~ ^~ ~
prog.cc:7:15: warning: left operand of comma operator has no effect [-Wunused-value]
7 | int l = (i != i,0); // C4547
| ~~^~~~
prog.cc:7:8: warning: unused variable 'l' [-Wunused-variable]
7 | int l = (i != i,0); // C4547
| ^