#include <iostream>

typedef int value_t;

class A {
public:
    A(int i) : i(i) {}
private:
    value_t operator &() {}
    const value_t operator &() const {}
    value_t& operator *() {}
    const value_t& operator *() const {}
    value_t* operator ->() {}
    const value_t* operator ->() const {}
    value_t& operator [](std::size_t index) {}
    const value_t& operator [](std::size_t index) const {}
    int i;
};

int main() {
    A a(1);
    return 0;
}

Scenario:
- reformat code
==> 'operator ->', 'operator -> const', 'operator [] const', 'operator []' has not empty line between methods
I see:
    const value_t& operator *() const {
    }
    value_t* operator ->() {
    }
    const value_t* operator ->() const {
    }
    value_t& operator [](std::size_t index) {
    }
    const value_t& operator [](std::size_t index) const {
    }