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/*

# Delegating constructor

Call one constructor from another in a given class.

*/

#include "common.hpp"

int main() {

#if __cplusplus >= 201103L

/* Basic example. */

{

class C {

public:

int i;

C() : C(1) {}

C(int i) : i(i) {}

};

C c;

assert(c.i == 1);

}

/* Nothing prevents recursion. */

{

class C {

public:

int i;

C() : C(1) {}

C(int i) : C() {}

};

/* Segfault because of stack overflow. */

/*C c;*/

}

/* Cannot call multiple constructors of the same class. */

{

class C {

public:

int i;

float f;

/* ERROR. */

/*C() : C(1), C(1.5) {}*/

C(int i) : i(i) {}

C(float f) : f(f) {}

};

}

/*

Cannot initialize anything else when a delegation is used:

http://stackoverflow.com/questions/12190051/member-initialization-while-using-delegated-constructor

*/

{

class C {

public:

int i;

int j;

C() : i(i) {}

//C(int i) : C(), i(i) {}

};

C c;

assert(c.i == 1);

}

/*

Works with inheritance.

TODO: Is this still called a "delegated constructor"?

*/

{

class B {

public:

int i;

B() : i(1) {}

};

class C : public B {

public:

int j;

C() : B(), j(2) {}

};

C c;

assert(c.i == 1);

assert(c.j == 2);

}

#endif

}