std::vector<std::string> args = Platform::InitCli(argc, argv);

if(args.size() == 3 && args[1] == "expr") {

std::string expr = args[2], err;

Expr *e = Expr::Parse(expr.c_str(), &err);

if(e == NULL) {

fprintf(stderr, "cannot parse: %s\n", err.c_str());

} else {

fprintf(stderr, "%g\n", e->Eval());

}

Platform::FreeAllTemporary();

} else {

fprintf(stderr, "Usage: %s <command> <options>\n", args[0].c_str());

fprintf(stderr, R"(

)");

}

return 0;