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Language

C++

Compiler

clang HEAD 12.0.0 (https://github.com/llvm/llvm-project.git 2ac06241d277c969c0dee0f40fb4f00971a4d7f7)

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:3:9: warning: unknown pragma ignored [-Wunknown-pragmas]
#pragma warning(default: 4389)
        ^
prog.cc:9:10: warning: comparison of integers of different signs: 'int' and 'unsigned int' [-Wsign-compare]
   if (a == b)   // C4389
       ~ ^  ~
2 warnings generated.
Exit Code:
0