Language
C++
Compiler
clang 8.0.0
Options
Warnings
Boost 1.73.0
C++2a(GNU)
no pedantic
$ clang++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.73.0/clang-8.0.0/include -std=gnu++2a Exit Code:
0
C++
clang 8.0.0
$ clang++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.73.0/clang-8.0.0/include -std=gnu++2a prog.cc:10:36: warning: equality comparison with extraneous parentheses [-Wparentheses-equality]
for(int i=0; ( x[ (c = f(0)) ] == 4 ); )
~~~~~~~~~~~~~~~~^~~~
prog.cc:10:36: note: remove extraneous parentheses around the comparison to silence this warning
for(int i=0; ( x[ (c = f(0)) ] == 4 ); )
~~ ^ ~
prog.cc:10:36: note: use '=' to turn this equality comparison into an assignment
for(int i=0; ( x[ (c = f(0)) ] == 4 ); )
^~
=
1 warning generated.