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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
-Wimplicit-int-conversion

$ clang++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.73.0/clang-head/include -std=c++2a -Wimplicit-int-conversion
prog.cc:10:8: warning: implicit conversion loses integer precision: 'int' to 'char' [-Wimplicit-int-conversion]
   a = func();   // C4242, return type and variable type do not match
     ~ ^~~~~~
1 warning generated.
Exit Code:
0