@aikidosec/firewall/sources/koa/isDeprecatedGenerator.js

Zen by Aikido is an embedded Application Firewall that autonomously protects Node.js apps against common and critical attacks, provides rate limiting, detects malicious traffic (including bots), and more.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.isDeprecatedGenerator = isDeprecatedGenerator;
/* eslint-disable func-names */
/**
 * Checks if a function is a generator function.
 * They are deprecated in koa v2 and are already removed in the main branch (will be completely removed in v3).
 */
function isDeprecatedGenerator(fn) {
    const GeneratorFunction = function* () { }.constructor;
    if (fn instanceof GeneratorFunction) {
        return true;
    }
    const AsyncGeneratorFunction = async function* () { }.constructor;
    if (fn instanceof AsyncGeneratorFunction) {
        return true;
    }
    return false;
}