Function optional_int

src/framework/io/yaml.cpp:278–284

    return std::stoi(require_string(document, key));
}

int64_t require_i64(const FlattenedDocument & document, const std::string & key) {
    return std::stoll(require_string(document, key));
}

float require_float(const FlattenedDocument & document, const std::string & key) {
    return std::stof(require_string(document, key));
}

bool require_bool(const FlattenedDocument & document, const std::string & key) {