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Language

C++

Compiler

clang HEAD 12.0.0 (https://github.com/llvm/llvm-project.git 344a3d0bc0fb0868b519c3342b4982d6121eece3)

Options
Warnings
Boost 1.73.0
C++2a
no pedantic
Raw compiler options
-Weverything

$ clang++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.73.0/clang-head/include -std=c++2a -Weverything
prog.cc:3:10: warning: no previous prototype for function 'shift8' [-Wmissing-prototypes]
unsigned shift8 (unsigned char c) {
         ^
prog.cc:3:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
unsigned shift8 (unsigned char c) {
^
static 
1 warning generated.
Exit Code:
0