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2014/06/17

cpp2011// 14.6 Name resolution

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// 1 filename:cpp2011-14-6.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
// >14 Templates 14.6 Name resolution
// (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 cpp2011-14-6.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 cpp2011-14-6.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 <ccomplex>
#include <cstddef>
#include <new>
#include <vector>
#include <valarray>

using namespace std;

// no B declared here
class X;
template<class T> class Y {
class Z; // forward declaration of member class
void f() {
X* a1; // declare pointer to X
T* a2; // declare pointer to T
Y* a3; // declare pointer to Y<T>
Z* a4; // declare pointer to Z
typedef typename T::A TA;
TA* a5; // declare pointer to T’s A
typename T::A* a6; // declare pointer to T’s A
//error: T::A* a7; // T::A is not a type name:
// multiply T::A by a7; ill-formed,
// no visible declaration of a7
//error: B* a8; // B is not a type name:
// multiply B by a8; ill-formed,
// no visible declarations of B and a8
}
};
//
struct A1 {
struct X { };
int X;
};
struct B {
struct X { };
};
template<class T> void f(T t) {
//error: typename T::X x;// typename specifier refers to non-type member 'X' in 'A1'
}
void foo() {
A1 a;
B b;
f(b); // OK: T::X refers to B::X
f(a); // error: T::X refers to the data member A::X not the struct A::X
}
//
template <class T> void f(int i) {
//error: T::x * i; // T::x must not be a type
}
struct Foo {
typedef int x;
};

struct Bar {
static int const x = 5;
};

//
template<class T> struct A2 {
typedef int B;
B b; // OK, no typename required
};
//
int j;
template<class T> class X1 {
void f(T t, int i, char* p) {
t = i; // diagnosed if X::f is instantiated
// and the assignment to t is an error
//error: p = i; // may be diagnosed even if X::f is
// not instantiated
//error: p = j; // may be diagnosed even if X::f is
// not instantiated
}
void g(T t) {
//error: +; // may be diagnosed even if X::g is
// not instantiated
}
};
//
#include <iostream>
using namespace std;
template<class T> class Set {
T* p;
int cnt;
public:
Set();
Set<T>(const Set<T>&);
void printall() {
for (int i = 0; i<cnt; i++)
cout << p[i] << '\n';
}
};
//
void f(char);
template<class T> void g(T t) {
f(1); // f(char)
f(T(1)); // dependent
f(t); // dependent
//error: dd++; // not dependent
// error: declaration for dd not found
}
enum E { e };
void f(E);
double dd;
void h() {
g(e); // will cause one call of f(char) followed
// by two calls of f(E)
g('a'); // will cause three calls of f(char)
}

int main() {
f<Bar>(1); // OK
f<Foo>(1); // error: Foo::x is a type
//
cout << "14 Templates 14.6 Name resolution" << std::endl;
return 0;
}
// 1 link error
// 1.1 llvm: c++ -std=c++11 -stdlib=libc++  -Wall cpp2011-14-6.cpp
cpp2011-14-6.cpp:80:4: warning: unused variable 'a1' [-Wunused-variable]
X* a1; // declare pointer to X
   ^
1 warning generated.
Undefined symbols for architecture x86_64:
  "f(E)", referenced from:
      void g<E>(E) in cpp2011-14-6-f90b6c.o
  "f(char)", referenced from:
      void g<char>(char) in cpp2011-14-6-f90b6c.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

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