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// { dg-do compile }

// { dg-options "-Weffc++" }

// Contributed by Benjamin Kosnik 

// PR c++/16169 : Improve -Weffc++ rule 15

struct A {

 const A& foo();

 const A& operator=(int)

 { return foo(); }

};

struct B {

  B& foo();

  B& operator=(int)

  { return foo(); }

};

struct C {

  C& operator=(int)

  { return *this; }

};

struct D {

  D operator=(int)

  { return *this; }      // { dg-warning "should return a reference" }

};

struct E {

  E& foo();

  E operator=(int)

  { return foo(); }      // { dg-warning "should return a reference" }

};

struct F

{

  operator float();

  float operator=(int)

  { return *this; }      // { dg-warning "should return a reference" }

};