cli

import
    std.stdio,
    std.conv;


mixin template cli(T){

    this(string[] args){
        foreach(member; __traits(allMembers, T)) {
            foreach(attr; __traits(getAttributes, mixin(member))){
                foreach(i, arg; args){
                    if(arg == attr){
                        static if(is(typeof(mixin(member)) == bool)){
                            mixin(member ~ " = ! " ~ member ~ ";");
                        }else{
                            mixin(member ~ " = to!(typeof(" ~ member ~ "))(args[i+1]);");
                        }
                    }
                }
            }
        }
    }

}


struct Options {

    @("-v") bool version_;
    @("-t") float time;
    @("-n") string name = "default";

    mixin cli!Options;

}

void main(string[] args){
    auto options = Options(args);
    writeln(options.version_);
    writeln(options.time);
    writeln(options.name);
}