// Copyright (c) Andreas Fertig.

// SPDX-License-Identifier: MIT

#include <iostream>

#ifdef WILL_NOT_COMPILE

struct Container {}; // #A Container without begin

int* begin(Container); // #B Free-function begin for Container

struct OtherContainer { // #C Container with begin

int* begin();

};

void Use(auto& c)

{

begin(c); // #D Call ::begin(Container)

std::begin(c); // #E Call STL std::begin

}

int* begin(Container) // #B Free-function begin for Container

{

std::cout << "begin(Container)\n";

return nullptr;

}

int* OtherContainer::begin()

{

std::cout << "OtherContainer::begin()\n";

return nullptr;

}

#endif

int main()

{

#ifdef WILL_NOT_COMPILE

Container c{};

Use(c);

#endif

}