ClaraBool.cpp

#include "clara.hpp"
#include <iostream>

int main( int argc, char** argv ) {
    int count = 0;
    using namespace clara;
    auto cli = Parser() | Opt( [&]( bool ) { count++; } )
            ["-s"];
    cli.parse( Args{ argc, argv } );
    std::cout << "Repeated: " << count << ", effective " << std::boolalpha << (count%2==1) << " (Command line was:";
    while (*argv) std::cout << " " << *argv++;
    std::cout << ")\n";
}