enum_ostream.cpp
1.49 KB
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// Copyright (c) 2017-2023, University of Cincinnati, developed by Henry Schreiner
// under NSF AWARD 1414736 and by the respective contributors.
// All rights reserved.
//
// SPDX-License-Identifier: BSD-3-Clause
#include <CLI/CLI.hpp>
#include <iostream>
#include <map>
#include <string>
enum class Level : int { High, Medium, Low };
// Defining operator<<() for your enum class (in this case for 'Level') overrides CLI11's enum streaming
inline std::ostream &operator<<(std::ostream &os, const Level &level) {
switch(level) {
case Level::High:
os << "High";
break;
case Level::Medium:
os << "Medium";
break;
case Level::Low:
os << "Low";
break;
}
os << " (ft rom custom ostream)";
return os;
}
int main(int argc, char **argv) {
CLI::App app;
Level level{Level::Low};
// specify string->value mappings
std::map<std::string, Level> map{{"high", Level::High}, {"medium", Level::Medium}, {"low", Level::Low}};
// CheckedTransformer translates and checks whether the results are either in one of the strings or in 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 CLI::enums::operator<<;
std::cout << "Enum received: " << level << std::endl;
return 0;
}