test/CodeGenCXX/ptr-to-member-function.cpp

// RUN: clang-cc -triple x86_64-apple-darwin -std=c++0x -S %s -o %t-64.s &&
// RUN: FileCheck -check-prefix LP64 --input-file=%t-64.s %s &&
// RUN: clang-cc -triple i386-apple-darwin -std=c++0x -S %s -o %t-32.s &&
// RUN: FileCheck -check-prefix LP32 --input-file=%t-32.s %s &&
// RUN: true
// 13.3.3.2 Ranking implicit conversion sequences

extern "C" int printf(...);

struct A {
int Ai;
}; 

struct B : public A {
  void bf() { printf("B::bf called\n"); }
}; 

struct C : public B { }; 

// conversion of B::* to C::* is better than conversion of A::* to C::*
typedef void (A::*pmfa)();
typedef void (B::*pmfb)();
typedef void (C::*pmfc)();

struct X {
	operator pmfa();
	operator pmfb() {
	  return &B::bf;
        }
};


void g(pmfc pm) {
  C c;
  (c.*pm)();
}

void test2(X x) 
{
    g(x);
}

int main()
{
	X x;
	test2(x);
}

// CHECK-LP64: call	__ZN1XcvM1BFvvEEv
// CHECK-LP64: call	__Z1gM1CFvvE

// CHECK-LP32: call	L__ZN1XcvM1BFvvEEv
// CHECK-LP32: call	__Z1gM1CFvvE