AC_DISABLE_COPY

Reference

#include <actl/lifetime/copy/AC_DISABLE_COPY.hpp>

AC_DISABLE_COPY(type)

Macro to be used inside a class to disable its copy constructor and assignment operator while allowing to define custom move constructor and assignment operator. For example,

class unique_ptr {
    void* pointer = nullptr;
public:
    unique_ptr() = default;
    AC_DISABLE_COPY(unique_ptr)

    unique_ptr(unique_ptr&& that) {
        this = std::move(*that);
    }
    unique_ptr& operator=(unique_ptr&& that) {
        this->poiner = that->pointer;
        that->poiner = nullptr;
        return *this;
    }
};

unique_ptr a;
unique_ptr b = a;            // compilation error
unique_ptr c = std::move(a); // ok

Default constructor is also disabled unless defined explicitly.

Note

Move constructor and assignment operator are disabled if not defined. If that’s the intention then it’s more descriptive to use AC_DISABLE_MOVE.

See tests at tests/lifetime/copy/AC_DISABLE_COPY.cpp