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Language

C++

Compiler

clang HEAD 12.0.0 (https://github.com/llvm/llvm-project.git 9087209314caafed4b232d4a66287f2d16054ad3)

Options
Warnings
Boost 1.73.0
C++2a
no pedantic

$ clang++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.73.0/clang-head/include -std=c++2a 
prog.cc:5:15: warning: operator '<<' has lower precedence than '+'; '+' will be evaluated first [-Wshift-op-parentheses]
   a = a << b + c;   // C4554
         ~~ ~~^~~
prog.cc:5:15: note: place parentheses around the '+' expression to silence this warning
   a = a << b + c;   // C4554
              ^
            (    )
1 warning generated.
Exit Code:
0