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Language

C++

Compiler

gcc HEAD 11.0.0 20200919 (experimental)

Options
Warnings
Boost 1.73.0
C++14
-pedantic

$ g++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.73.0/gcc-head/include -std=c++14 -pedantic 
prog.cc: In function 'int main()':
prog.cc:4:8: warning: 'if constexpr' only available with '-std=c++17' or '-std=gnu++17'
    4 |     if constexpr (b) { return 0; }
      |        ^~~~~~~~~
Exit Code:
0