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2014/06/16

C++N3242, 2011(117) 12.2 Temporary objects

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// 1 filename:cpp2011-12-2.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
// > 12 Special member functions 12.2 Temporary objects
//
// 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 cpp2011-12-2.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 cpp2011-12-2.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>

//#define complex _Complex double

using namespace std;

class X {
public:
X(int);
X(const X&);
~X();
};
class Y {
public:
Y(int);
Y(Y&&);
~Y();
};
X f(X);
Y g(Y);
void h() {
X a(1);
X b = f(X(2));
Y c = g(Y(3));
a = f(a);
}
//
struct S { int mi; const std::pair<int,int>& mp; };
S a { 1, {2,3} };
S* p = new S{ 1, {2,3} }; // Creates dangling reference
//
struct S1 {
S1();
S1(int);
friend S1 operator+(const S1&, const S1&);
~S1();
};
int main() {
S1 obj1;
const S1& cr = S1(16)+S1(23);
S1 obj2;
//
cout << "12 Special member functions 12.2 Temporary objects" << std::endl;
return 0;
}
// 1  output
// 1.1 llvm  c++ -std=c++11 -stdlib=libc++  -Wall cpp2011-12-2.cpp 
cpp2011-12-2.cpp:109:11: warning: unused variable 'cr' [-Wunused-variable]
const S1& cr = S1(16)+S1(23);
          ^
1 warning generated.
Undefined symbols for architecture x86_64:
  "f(X)", referenced from:
      h() in cpp2011-12-2-986544.o
  "g(Y)", referenced from:
      h() in cpp2011-12-2-986544.o
  "X::X(X const&)", referenced from:
      h() in cpp2011-12-2-986544.o
  "X::X(int)", referenced from:
      h() in cpp2011-12-2-986544.o
  "X::~X()", referenced from:
      h() in cpp2011-12-2-986544.o
  "Y::Y(int)", referenced from:
      h() in cpp2011-12-2-986544.o
  "Y::~Y()", referenced from:
      h() in cpp2011-12-2-986544.o
  "S1::S1(int)", referenced from:
      _main in cpp2011-12-2-986544.o
  "S1::S1()", referenced from:
      _main in cpp2011-12-2-986544.o
  "S1::~S1()", referenced from:
      _main in cpp2011-12-2-986544.o
  "operator+(S1 const&, S1 const&)", referenced from:
      _main in cpp2011-12-2-986544.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
// 1.2 gcc: g++-4.9 -std=c++11 -Wall cpp2011-12-2.cpp 
Undefined symbols for architecture x86_64:
  "f(X)", referenced from:
      h()    in ccfpQGAT.o
  "g(Y)", referenced from:
      h()    in ccfpQGAT.o
  "X::X(X const&)", referenced from:
      h()    in ccfpQGAT.o
  "X::X(int)", referenced from:
      h()    in ccfpQGAT.o
  "X::~X()", referenced from:
      h()    in ccfpQGAT.o
  "Y::Y(int)", referenced from:
      h()    in ccfpQGAT.o
  "Y::~Y()", referenced from:
      h()    in ccfpQGAT.o
  "S1::S1(int)", referenced from:
      _main in ccfpQGAT.o
  "S1::S1()", referenced from:
      _main in ccfpQGAT.o
  "S1::~S1()", referenced from:
      _main in ccfpQGAT.o
  "operator+(S1 const&, S1 const&)", referenced from:
      _main in ccfpQGAT.o
ld: symbol(s) not found for architecture x86_64
collect2: error: ld returned 1 exit status


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