Objective-C Block type as return value

问题

How do I write the following:

typedef void (^T)(void);
T f() {
    return ^{};
}

without the typedef?

回答1:

void (^f())(void) { 
  return ^{};
}

You'd better keep the typedef as the return type is not easy to understand in this form.

来源：https://stackoverflow.com/questions/3948173/objective-c-block-type-as-return-value