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2014/04/26

cpp2011// 14.8.3 Overload resolution

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// 1 filename:cpp2011-14-8-3.cpp
// ver 0.1 June.12, 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
// >14 Templates 14.8 Function template specializations 14.8.3 Overload resolution
//
// 3 compile and output mechanism:
// (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 cpp2011-14-8-3.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 cpp2011-14-8-3.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 
//#include 
//#include 
//#include 
//#include 
//#include 
//#include 
//#include 
//#include 

using namespace std;
//cpp2011-14-8-3.cpp:73:10: error: call to 'max' is ambiguous
//int m1 = max(a,b); // max(int a, int b)
// ^~~
///Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/c++/v1/algorithm:2608:1: note: 
// candidate function [with _Tp = int]
//max(const _Tp& __a, const _Tp& __b)
//^
//cpp2011-14-8-3.cpp:71:21: note: candidate function [with T = int]
//template T max(T a, T b) { return a>b?a:b; }
// ^
// change max to max2
template T max2(T a, T b) { return a>b?a:b; }
void f(int a, int b, char c, char d) {
int m1 = max2(a,b); // max(int a, int b)
char m2 = max2(c,d); // max(char a, char b)
//error: int m3 = max(a,c); // error: cannot generate max(int,char)
}

//
template struct B { /* ... */ };
template struct D : public B { /* ... */ };
template void f2(B&);
void g(B& bi, D& di) {
//
f2(bi); // f(bi)
f2(di); // f((B&)di)
}
//
template void f3(T*,int); // #1
template void f3(T,char); // #2
void h(int* pi, int i, char c) {
f3(pi,i); // #1: f(pi,i)
f3(pi,c); // #2: f(pi,c)
f3(i,c); // #2: f(i,c);
f3(i,i); // #2: f(i,char(i))
}
//
template void f4(T); // declaration
void g() {
f4("Annemarie"); // call of f
}

//
int main() {
cout << "14 Templates 14.8 Function template specializations 14.8.3 Overload resolution"<
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