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Boost-Commit : |
From: grafikrobot_at_[hidden]
Date: 2007-11-30 10:58:59
Author: grafik
Date: 2007-11-30 10:58:59 EST (Fri, 30 Nov 2007)
New Revision: 41494
URL: http://svn.boost.org/trac/boost/changeset/41494
Log:
Obsolete. (fixes #1362)
Removed:
trunk/more/microsoft_vcpp.html
Deleted: trunk/more/microsoft_vcpp.html
Boost-Commit list run by bdawes at acm.org, david.abrahams at rcn.com, gregod at cs.rpi.edu, cpdaniel at pacbell.net, john at johnmaddock.co.uk
==============================================================================
--- trunk/more/microsoft_vcpp.html 2007-11-30 10:58:59 EST (Fri, 30 Nov 2007)
+++ (empty file)
@@ -1,326 +0,0 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
-
-<html>
-<head>
- <meta http-equiv="Content-Language" content="en-us">
- <meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
-
- <title>Portability Hints: Microsoft Visual C++ 6.0 SP4</title>
-</head>
-
-<body bgcolor="#FFFFFF" text="#000000">
- <table border="1" bgcolor="#007F7F" cellpadding="2" summary="">
- <tr>
- <td bgcolor="#FFFFFF"><img src="../boost.png" alt=
- "boost.png (6897 bytes)" width="277" height="86"></td>
-
- <td><a href="../index.htm"><font face="Arial,Helvetica" color=
- "#FFFFFF"><big>Home</big></font></a></td>
-
- <td><a href="../libs/libraries.htm"><font face="Arial,Helvetica" color=
- "#FFFFFF"><big>Libraries</big></font></a></td>
-
- <td><a href="../people/people.htm"><font face="Arial,Helvetica" color=
- "#FFFFFF"><big>People</big></font></a></td>
-
- <td><a href="faq.htm"><font face="Arial,Helvetica" color=
- "#FFFFFF"><big>FAQ</big></font></a></td>
-
- <td><a href="index.htm"><font face="Arial,Helvetica" color=
- "#FFFFFF"><big>More</big></font></a></td>
- </tr>
- </table>
-
- <h1>Portability Hints: Microsoft Visual C++ 6.0 SP4</h1>
-
- <p>Similar to the <a href="borland_cpp.html">portability hints for Borland
- C++</a>, this page provides hints on some language features of the
- Microsoft Visual C++ version 6.0 service pack 4 compiler. A list of
- acknowledged deficiencies can be found at the <a href=
- "http://support.microsoft.com/support/kb/articles/q243/4/51.asp">Microsoft
- support site</a>.</p>
-
- <p>Each entry in the following list describes a particular issue, complete
- with sample source code to demonstrate the effect. Most sample code herein
- has been verified to compile with gcc 2.95.2 and Comeau C++ 4.2.44.</p>
-
- <h2>Preprocessor symbol</h2>
-
- <p>The preprocessor symbol <code>_MSC_VER</code> is defined for all
- Microsoft C++ compilers. Its value is the internal version number of the
- compiler interpreted as a decimal number. Since a few other compilers also
- define this symbol, boost provides the symbol <code>BOOST_MSVC</code>,
- which is defined in boost/config.hpp to
- the value of _MSC_VER if and only if the compiler is really Microsoft
- Visual C++. The following table lists some known values.</p>
-
- <table border="1" summary="">
- <tr>
- <th>Compiler</th>
-
- <th><code>BOOST_MSVC</code> value</th>
- </tr>
-
- <tr>
- <td>Microsoft Visual C++ 6.0 (up to SP6)</td>
-
- <td>1200</td>
- </tr>
-
- <tr>
- <td>Microsoft embedded Visual C++ 4.0</td>
-
- <td>1200-1202 (cross compilers)</td>
- </tr>
- </table>
-
- <h2>Core Language</h2>
-
- <h3>[chained using] Chaining <code>using</code>-declarations</h3>
-
- <p>Chaining <code>using</code>-declarations does not work.</p>
- <pre>
-void f();
-
-namespace N {
- using ::f;
-}
-
-void g()
-{
- using N::f; // C2873: 'f': the symbol cannot be used in a using-declaration
-}
-</pre>
-
- <h3>[explicit-instantiation] Explicit function template instantiation</h3>
-
- <p>Trying to explicitly instantiate a function template leads to the wrong
- function being called silently.</p>
- <pre>
-#include <stdio.h>
-
-template<class T>
-void f()
-{
- printf("%d\n", sizeof(T));
-}
-
-int main()
-{
- f<double>(); // output: "1"
- f<char>(); // output: "1"
- return 0;
-}
-</pre>
-
- <h3>[for-scoping] Scopes of definitions in for-loops</h3>
-
- <p>The scope of variable definitions in <code>for</code> loops should be
- local to the loop's body, but it is instead local to the enclosing
- block.</p>
- <pre>
-int main()
-{
- for(int i = 0; i < 5; ++i)
- ;
- for(int i = 0; i < 5; ++i) // C2374: 'i': Redefinition; multiple initialization
- ;
- return 0;
-}
-</pre>
-
- <p><strong>Workaround:</strong> Enclose the offending <code>for</code>
- loops in another pair of curly braces.</p>
-
- <p>Another possible workaround (brought to my attention by Vesa Karvonen)
- is this:</p>
- <pre>
-#ifndef for
-#define for if (0) {} else for
-#endif
-</pre>
-
- <p>Note that platform-specific inline functions in included headers might
- depend on the old-style <code>for</code> scoping.</p>
-
- <h3>[inclass-member-init] In-class member initialization</h3>
-
- <p>In-class member initialization, required to implement a
- Standard-conforming <code>std::numeric_limits</code> template, does not
- work.</p>
- <pre>
-struct A
-{
- static const int i = 5; // "invalid syntax for pure virtual method"
-};
-</pre>
-
- <p><strong>Workaround:</strong> Either use an enum (which has incorrect
- type, but can be used in compile-time constant expressions), or define the
- value out-of-line (which allows for the correct type, but prohibits using
- the constant in compile-time constant expressions). See <a href=
- "int_const_guidelines.htm">Coding Guidelines for Integral Constant
- Expressions</a> for guidelines how to define member constants portably in
- boost libraries.</p>
-
- <h3>[koenig-lookup] Argument-dependent lookup</h3>
-
- <p>Argument-dependent lookup, also called Koenig lookup, works for
- overloaded operators, but not for ordinary functions. No additional
- namespaces induced from the argument types seem to be considered.</p>
- <pre>
-namespace N {
- struct A {};
- void f(A);
-}
-
-void g()
-{
- N::A a;
- f(a); // 'f': undeclared identifier
-}
-</pre>
-
- <h3>[template-friend] Templates as friends</h3>
-
- <p>A Template cannot be declared a friend of a class.</p>
- <pre>
-template<class T>
-struct A {};
-
-struct B
-{
- template<class T>
- friend struct A; // "syntax error"
-};
-</pre>
-
- <h3>[member-template-outofline] Out-of-line definitions of member
- templates</h3>
-
- <p>Defining member templates outside their enclosing class does not
- work.</p>
- <pre>
-template<class T>
-struct A
-{
- template<class U>
- void f();
-};
-
-template<class T>
-template<class U> // "syntax error"
-void A<T>::f() // "T: undeclared identifier"
-{
-}
-</pre>
-
- <p><strong>Workaround:</strong> Define member templates in-line within
- their enclosing class.</p>
-
- <h3>[partial-spec] Partial specialization</h3>
-
- <p>Partial specialization of class templates does not work.</p>
- <pre>
-template<class T>
-struct A {};
-
-template<class T>
-struct B {};
-
-template<class T>
-struct A<B<T> > {}; // template class was already defined as a non-template
-</pre>
-
- <p><strong>Workaround:</strong> In some situations where interface does not
- matter, class member templates can simulate partial specialization.</p>
-
- <h3>[template-value] Dependent template value parameters</h3>
-
- <p>Template value parameters whose type depends on a previous template
- parameter provoke an internal compiler error if the correct syntax (with
- "typename") is used.</p>
- <pre>
-template<class T, typename T::result_type> // C1001: INTERNAL COMPILER ERROR: msc1.cpp, line 1794
-struct B {};
- // (omit "typename" and it compiles)
-
-</pre>
-
- <p><strong>Workaround:</strong> Leave off the "typename" keyword. That
- makes the program non-conforming, though.</p>
-
- <h3>[wchar_t] <code>wchar_t</code> is not built-in</h3>
-
- <p>The type <code>wchar_t</code> is not a built-in type.</p>
- <pre>
-wchar_t x; // "missing storage class or type identifier"
-</pre>
-
- <p><strong>Workaround:</strong> When using Microsoft Visual C++, the header
- boost/config.hpp includes
- <code><cstddef></code>, which defines <code>wchar_t</code> as a
- typedef for <code>unsigned short</code>. Note that this means that the
- compiler does not regard <code>wchar_t</code> and <code>unsigned
- short</code> as distinct types, as is required by the standard, and so
- ambiguities may emanate when overloading on <code>wchar_t</code>. The macro
- <code>BOOST_NO_INTRINSIC_WCHAR_T</code> is defined in this situation.</p>
-
- <h3>[delete-const-pointer] Deleting <code>const X *</code> does not
- work</h3>
-
- <p>Trying to delete a pointer to a cv-qualified type gives an error:</p>
- <pre>
-void f()
-{
- const int *p = new int(5);
- delete p; // C2664: cannot convert from "const int *" to "void *"
-}
-</pre>
-
- <p><strong>Workaround:</strong> Define the function</p>
- <pre>
-inline void operator delete(const void *p) throw()
-{ operator delete(const_cast<void*>(p)); }
-</pre>
-
- <p>and similar functions for the other cv-qualifier combinations, for
- operator delete[], and for the <code>std::nothrow</code> variants.</p>
-
- <h2>Standard Library</h2>
-
- <h3>[clib-namespace] C library names in global namespace instead of
- std</h3>
-
- <p>Library names from the <c...> headers are in the global namespace
- instead of namespace std.</p>
-
- <p><b>Workaround:</b> The header <a href=
- "../libs/config/config.htm">boost/config.hpp</a> will define
- BOOST_NO_STDC_NAMESPACE. It can be used as follows:</p>
- <pre>
-# ifdef BOOST_NO_STDC_NAMESPACE
- namespace std { using ::abs; using ::fabs; }
-# endif
-</pre>
-
- <p>Because std::size_t and std::ptrdiff_t are so commonly used, the
- workaround for these is already provided in boost/config.hpp.</p>
- <hr>
-
- <p><a href="http://validator.w3.org/check?uri=referer"><img border="0" src=
- "http://www.w3.org/Icons/valid-html401" alt="Valid HTML 4.01 Transitional"
- height="31" width="88"></a></p>
-
- <p>Revised
- <!--webbot bot="Timestamp" s-type="EDITED" s-format="%d %B, %Y" startspan -->04 December, 2006<!--webbot bot="Timestamp" endspan i-checksum="38514" --></p>
-
- <p><i>Copyright © 2001-2002 <a href="../people/jens_maurer.htm">Jens
- Maurer</a></i></p>
-
- <p><i>Distributed under the Boost Software License, Version 1.0. (See
- accompanying file LICENSE_1_0.txt or copy
- at <a href=
- "http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt>)</i></p>
-</body>
-</html>