swc/tests/fixture/issue-1729/case2/output/index.ts

function createConstructor(callback) {
    let klass;
    return (...args)=>{
        if (klass === undefined) {
            klass = callback();
        }
        return new klass(...args);
    };
}
const constructor = createConstructor(()=>class {
    }
);
console.log(constructor());