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2014/06/14

C++N3242, 2011 (60) 7.2 Enumeration declarations

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// 1 filename:cpp2011-7-12.cpp
// ver 0.1 June.13, 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
// > 7 Declarations 7.2 Enumeration declarations
//
// 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 cpp2011-7-2.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 cpp2011-7-2.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>

using namespace std;

enum { a, b, c=0 };
enum { d, e, f=e+2 };

//
struct X {
enum direction { left='l', right='r' };
int f(int i) { return i==left ? 0 : i==right ? 1 : 2; }
};
void g(X* p) {
//error: direction d; // error: direction not in scope
int i;
//error: i = p->f(left); // error: left not in scope
i = p->f(X::right); // OK
i = p->f(p->left); // OK
// ...
}
//
//
enum direction { left_d='l', right_d='r' };
void g() {
direction d; // OK
d = left_d; // OK
d = direction::right_d; // OK
}
enum class altitude { high='h', low='l' };
void h() {
altitude a; // OK
//error: a = high; // error: high not in scope
a = altitude::low; // OK
}

int main() {
enum color { red, yellow, green=20, blue };
color col = red;
color* cp = &col;
if (*cp == blue) // ...
//
//error: color c = 1; // error: type mismatch,
// no conversion from int to color
// cpp2011-7-2.cpp:110:5: warning: unused variable 'i' [-Wunused-variable]
int i=yellow; // OK: yellow converted to integral value 1
// integral promotion
//cout << i << std::endl;cpp2011-7-2.cpp:112:12: error: use of undeclared identifier 'i'
cout << d << std::endl;
//
enum class Col { red, yellow, green };
//error: int x = Col::red; // error: no Col to int conversion
Col y = Col::red;
//error: if (y) { } // error: no Col to bool conversion
//
cout << col << std::endl;
cout << *cp << std::endl;
cout << (int)y << std::endl;
cout << "7 Declarations 7.2 Enumeration declarations" << std::endl;
return 0;
}
// 1 output
// 0
// 0
// 0
// 0
// 7 Declarations 7.2 Enumeration declarations


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