enum_ostream.cpp
1.1 KB
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#include <CLI/CLI.hpp>
enum class Level : int { High, Medium, Low };
// this breaks the code
inline std::ostream &operator<<(std::ostream &o, const Level &l) {
switch(l) {
case Level::High:
o << "High";
break;
case Level::Medium:
o << "Medium";
break;
case Level::Low:
o << "Low";
break;
}
return o;
}
int main(int argc, char **argv) {
CLI::App app;
Level level;
// specify string->value mappings
std::vector<std::pair<std::string, Level>> map{
{"high", Level::High}, {"medium", Level::Medium}, {"low", Level::Low}};
// checked Transform does the translation and checks the results are either in one of the strings or one of the
// translations already
app.add_option("-l,--level", level, "Level settings")
->required()
->transform(CLI::CheckedTransformer(map, CLI::ignore_case));
CLI11_PARSE(app, argc, argv);
// CLI11's built in enum streaming can be used outside CLI11 like this:
using namespace CLI::enums;
std::cout << "Enum received: " << level << std::endl;
return 0;
}