// 1 filename:cpp2011-13-3-3.cpp
// ver 0.1 June.15, 2014
//
// 2 original examples and/or notes:
// (c) ISO/IEC JTC1 SC22 WG21 N3242, April 12, 2011
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2011/n3242.pdf
// >13 Overloading 13.3 Overload resolution 13.3.3 Best viable function
// (c) Dr. OGAWA Kiyoshi, kaizen at gifu-u.ac.jp,
//
// 4 compile errors and/or warnings:
// 4.1(c) Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn)
// Target: x86_64-apple-darwin13.2.0,  Thread model: posix
// Command/Options: c++ -std=c++11 -stdlib=libc++ -Wall cpp2011-13-3-3.cpp 
// (c) LLVM 2003-2009 University of Illinois at Urbana-Champaign.

// 4.2. g++-4.9 (GCC) 4.9.0 20131229 (experimental)
// Copyright (C) 2013 Free Software Foundation, Inc.
// This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// http://gcc.gnu.org/onlinedocs/gcc/Standards.html
// Command/Options: g++-4.9  -std=c++11  -Wall cpp2011-13-3-3.cpp 
// g++-4.9: error: unrecognized command line option '-stdlib=libc++'
// Configuration:brew install gcc49
//
// 4.3. Visual Studio Express 2013, 
// (c) Microsoft http://www.visualstudio.com/
// SPEC:
// Windows 7, .NET Framework
// (c) VMware, Inc.
// VMWare fusion 6
//
// 5. Hardware:  MacBook Pro, 
//(c) Intel http://ark.intel.com/products/37006/
//Core 2 Duo 2.53GHz, 8GB, 1067MHz DDR3
//
// 6. Special Thanks: Upper organizatios and 
// ITSCJ/IPSJ http://www.itscj.ipsj.or.jp/itscj_english/index.html
// Renesas Electronics Corporation.http://www.renesas.com/
// NPO SESSAME project, http://www.sessame.jp/workinggroup/WorkingGroup3/
// Toyo Corporation, http://www.toyo.co.jp/English/
// Japan Standard Association, http://bit.ly/1lzykg1
// NPO TOPPERS project, https://www.toppers.jp/asp-d-download.html
// Daido Universcity, http://www.daido-it.ac.jp/gakubugakka/computer/index.html
// WITZ Co.Ltd., http://www.witz-inc.co.jp/products/solution/solution.html
// SevenWise.co., http://www.7ws.co.jp/index.html
// TOYOTA Motor Corporation, http://toyota.jp/
// IT planning Inc., http://www.itpl.co.jp/en/index.html
// DENSO Corporation, http://www.globaldenso.com/en/
// Aisin Seiki co. Ltd., http://www.aisin.com/
// Spancion Inc., http://www.spansion.com/
// Yazaki Corporation, http://www.yazaki-group.com/global/
// Pananosic Corporation, http://www.panasonic.net/
// SWEST: Summer Workshop on Embedded System Technologies , http://swest.toppers.jp
// CEST: Consortium for Embedded System Technology, http://www.ertl.jp/CEST/
// JUSE: Union of Japanese Scientists and Engineers, http://www.juse.or.jp/e/
// OSC:Open Source Conference, http://www.ospn.jp/

#include <iostream>
//#include <cstdlib>
//#include <string.h>
//#include <cstring>
//#include <type_traits>
//#include <cassert>
//#include <algorithm>
//#include <cmath>
//#include <complex>
//#include <cstddef>
//#include <new>
//#include <vector>
//#include <valarray>

using namespace std;

struct A {
A();
operator int();
operator double();
} a;
int i = a; // a.operator int() followed by no conversion
// is better than a.operator double() followed by
// a conversion to int
//error: float x = a; // ambiguous: both possibilities require conversions,
// and neither is better than the other
//
void Fcn(const int*, short);
void Fcn(int*, int);
int i1;
short s = 0;
void f() {
	//error: Fcn(&i, s); // is ambiguous because
// &i ! int* is better than &i ! const int*
// but s ! short is also better than s ! int
Fcn(&i1, 1L); // calls Fcn(int*, int), because
// &i ! int* is better than &i ! const int*
// and 1L ! short and 1L ! int are indistinguishable
Fcn(&i1,'c'); // calls Fcn(int*, int), because
// &i ! int* is better than &i ! const int*
// and c ! int is better than c ! short
}
//
namespace A1 {
extern "C" void f(int = 5);
}
namespace B1 {
extern "C" void f(int = 5);
}
using A1::f;
using B1::f;
void use() {
f(3); // OK, default argument was not used for viability
	//error: f(); // Error: found default argument twice
}


int main() {
	cout << "13 Overloading 13.3 Overload resolution 13.3.3 Best viable function" << std::endl;
	return 0;
}
// 1 link error
// c++ -std=c++11 -stdlib=libc++  -Wall cpp2011-13-3-3.cpp 
Undefined symbols for architecture x86_64:
  "Fcn(int*, int)", referenced from:
      f() in cpp2011-13-3-3-6bec91.o
  "A::A()", referenced from:
      ___cxx_global_var_init in cpp2011-13-3-3-6bec91.o
  "A::operator int()", referenced from:
      ___cxx_global_var_init1 in cpp2011-13-3-3-6bec91.o
  "_f", referenced from:
      use() in cpp2011-13-3-3-6bec91.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)