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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
-Wtype-limits

$ clang++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.73.0/clang-head/include -std=c++2a -Wtype-limits
prog.cc:7:10: warning: result of comparison of unsigned expression < 0 is always false [-Wtautological-unsigned-zero-compare]
   if (u < 0)    // C4296
       ~ ^ ~
prog.cc:9:10: warning: result of comparison of unsigned expression >= 0 is always true [-Wtautological-unsigned-zero-compare]
   if (u >= 0)   // C4296
       ~ ^  ~
2 warnings generated.
Exit Code:
0