diff options
Diffstat (limited to 'libstdc++-v3/doc/html/manual/backwards.html')
| -rw-r--r-- | libstdc++-v3/doc/html/manual/backwards.html | 48 |
1 files changed, 24 insertions, 24 deletions
diff --git a/libstdc++-v3/doc/html/manual/backwards.html b/libstdc++-v3/doc/html/manual/backwards.html index b0e62138d1e..40511603955 100644 --- a/libstdc++-v3/doc/html/manual/backwards.html +++ b/libstdc++-v3/doc/html/manual/backwards.html @@ -14,8 +14,8 @@ ISO Standard (e.g., statistical analysis). While there are a lot of really useful things that are used by a lot of people, the Standards Committee couldn't include everything, and so a lot of those “<span class="quote">obvious</span>” classes didn't get included. -</p><p>Known Issues include many of the limitations of its immediate ancestor.</p><p>Portability notes and known implementation limitations are as follows.</p><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id508903"></a>No <code class="code">ios_base</code></h4></div></div></div><p> At least some older implementations don't have <code class="code">std::ios_base</code>, so you should use <code class="code">std::ios::badbit</code>, <code class="code">std::ios::failbit</code> and <code class="code">std::ios::eofbit</code> and <code class="code">std::ios::goodbit</code>. -</p></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id508935"></a>No <code class="code">cout</code> in <code class="code">ostream.h</code>, no <code class="code">cin</code> in <code class="code">istream.h</code></h4></div></div></div><p> +</p><p>Known Issues include many of the limitations of its immediate ancestor.</p><p>Portability notes and known implementation limitations are as follows.</p><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id476508"></a>No <code class="code">ios_base</code></h4></div></div></div><p> At least some older implementations don't have <code class="code">std::ios_base</code>, so you should use <code class="code">std::ios::badbit</code>, <code class="code">std::ios::failbit</code> and <code class="code">std::ios::eofbit</code> and <code class="code">std::ios::goodbit</code>. +</p></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id476540"></a>No <code class="code">cout</code> in <code class="code">ostream.h</code>, no <code class="code">cin</code> in <code class="code">istream.h</code></h4></div></div></div><p> In earlier versions of the standard, <code class="filename">fstream.h</code>, <code class="filename">ostream.h</code> @@ -41,7 +41,7 @@ considered replaced and rewritten. archived. The code is considered replaced and rewritten. </p><p> Portability notes and known implementation limitations are as follows. -</p><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id509035"></a>Namespace <code class="code">std::</code> not supported</h4></div></div></div><p> +</p><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id474567"></a>Namespace <code class="code">std::</code> not supported</h4></div></div></div><p> Some care is required to support C++ compiler and or library implementation that do not have the standard library in <code class="code">namespace std</code>. @@ -105,7 +105,7 @@ AC_DEFUN([AC_CXX_NAMESPACE_STD], [ AC_DEFINE(HAVE_NAMESPACE_STD,,[Define if g++ supports namespace std. ]) fi ]) -</pre></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id509158"></a>Illegal iterator usage</h4></div></div></div><p> +</pre></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id474690"></a>Illegal iterator usage</h4></div></div></div><p> The following illustrate implementation-allowed illegal iterator use, and then correct use. </p><div class="itemizedlist"><ul type="disc"><li><p> @@ -118,7 +118,7 @@ AC_DEFUN([AC_CXX_NAMESPACE_STD], [ </p></li><li><p> <code class="code">if (iterator)</code> won't work any more => use <code class="code">if (iterator != iterator_type())</code> - </p></li></ul></div></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id590218"></a><code class="code">isspace</code> from <code class="filename">cctype</code> is a macro + </p></li></ul></div></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id474751"></a><code class="code">isspace</code> from <code class="filename">cctype</code> is a macro </h4></div></div></div><p> Glibc 2.0.x and 2.1.x define <code class="filename">ctype.h</code> functionality as macros (isspace, isalpha etc.). @@ -151,7 +151,7 @@ std:: (__ctype_b[(int) ( ( 'X' ) )] & (unsigned short int) _ISspace ) ; (<code class="filename">ctype.h</code>) and the definitions in namespace <code class="code">std::</code> (<code class="code"><cctype></code>). -</p></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id590311"></a>No <code class="code">vector::at</code>, <code class="code">deque::at</code>, <code class="code">string::at</code></h4></div></div></div><p> +</p></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id474845"></a>No <code class="code">vector::at</code>, <code class="code">deque::at</code>, <code class="code">string::at</code></h4></div></div></div><p> One solution is to add an autoconf-test for this: </p><pre class="programlisting"> AC_MSG_CHECKING(for container::at) @@ -177,7 +177,7 @@ AC_DEFINE(HAVE_CONTAINER_AT)], </pre><p> If you are using other (non-GNU) compilers it might be a good idea to check for <code class="code">string::at</code> separately. -</p></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id590349"></a>No <code class="code">std::char_traits<char>::eof</code></h4></div></div></div><p> +</p></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id415929"></a>No <code class="code">std::char_traits<char>::eof</code></h4></div></div></div><p> Use some kind of autoconf test, plus this: </p><pre class="programlisting"> #ifdef HAVE_CHAR_TRAITS @@ -185,7 +185,7 @@ AC_DEFINE(HAVE_CONTAINER_AT)], #else #define CPP_EOF EOF #endif -</pre></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id590367"></a>No <code class="code">string::clear</code></h4></div></div></div><p> +</pre></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id415947"></a>No <code class="code">string::clear</code></h4></div></div></div><p> There are two functions for deleting the contents of a string: <code class="code">clear</code> and <code class="code">erase</code> (the latter returns the string). @@ -203,12 +203,12 @@ erase(size_type __pos = 0, size_type __n = npos) Unfortunately, <code class="code">clear</code> is not implemented in this version, so you should use <code class="code">erase</code> (which is probably faster than <code class="code">operator=(charT*)</code>). -</p></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id590413"></a> +</p></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id415993"></a> Removal of <code class="code">ostream::form</code> and <code class="code">istream::scan</code> extensions </h4></div></div></div><p> These are no longer supported. Please use stringstreams instead. -</p></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id590432"></a>No <code class="code">basic_stringbuf</code>, <code class="code">basic_stringstream</code></h4></div></div></div><p> +</p></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id416012"></a>No <code class="code">basic_stringbuf</code>, <code class="code">basic_stringstream</code></h4></div></div></div><p> Although the ISO standard <code class="code">i/ostringstream</code>-classes are provided, (<code class="filename">sstream</code>), for compatibility with older implementations the pre-ISO @@ -296,14 +296,14 @@ any = temp; Another example of using stringstreams is in <a class="link" href="bk01pt05ch13s05.html" title="Shrink to Fit">this howto</a>. </p><p> There is additional information in the libstdc++-v2 info files, in particular “<span class="quote">info iostream</span>”. -</p></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id590584"></a>Little or no wide character support</h4></div></div></div><p> +</p></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id416164"></a>Little or no wide character support</h4></div></div></div><p> Classes <code class="classname">wstring</code> and <code class="classname">char_traits<wchar_t></code> are not supported. - </p></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id474404"></a>No templatized iostreams</h4></div></div></div><p> + </p></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id416183"></a>No templatized iostreams</h4></div></div></div><p> Classes <code class="classname">wfilebuf</code> and <code class="classname">wstringstream</code> are not supported. - </p></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id474423"></a>Thread safety issues</h4></div></div></div><p> + </p></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id416202"></a>Thread safety issues</h4></div></div></div><p> Earlier GCC releases had a somewhat different approach to threading configuration and proper compilation. Before GCC 3.0, configuration of the threading model was dictated by compiler @@ -361,7 +361,7 @@ libstdc++-v3. of the SGI STL (version 3.3), with extensive changes. </p><p>A more formal description of the V3 goals can be found in the official <a class="ulink" href="../17_intro/DESIGN" target="_top">design document</a>. - </p><p>Portability notes and known implementation limitations are as follows.</p><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id474542"></a>Pre-ISO headers moved to backwards or removed</h4></div></div></div><p> The pre-ISO C++ headers + </p><p>Portability notes and known implementation limitations are as follows.</p><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id418744"></a>Pre-ISO headers moved to backwards or removed</h4></div></div></div><p> The pre-ISO C++ headers (<code class="code">iostream.h</code>, <code class="code">defalloc.h</code> etc.) are available, unlike previous libstdc++ versions, but inclusion generates a warning that you are using deprecated headers. @@ -433,7 +433,7 @@ like <code class="filename">vector.h</code> can be replaced with <code class="fi directive <code class="code">using namespace std;</code> can be put at the global scope. This should be enough to get this code compiling, assuming the other usage is correct. -</p></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id474625"></a>Extension headers hash_map, hash_set moved to ext or backwards</h4></div></div></div><p>At this time most of the features of the SGI STL extension have been +</p></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id418827"></a>Extension headers hash_map, hash_set moved to ext or backwards</h4></div></div></div><p>At this time most of the features of the SGI STL extension have been replaced by standardized libraries. In particular, the unordered_map and unordered_set containers of TR1 are suitable replacement for the non-standard hash_map and hash_set @@ -505,7 +505,7 @@ AC_DEFUN([AC_HEADER_EXT_HASH_SET], [ AC_DEFINE(HAVE_EXT_HASH_SET,,[Define if ext/hash_set is present. ]) fi ]) -</pre></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id474727"></a>No <code class="code">ios::nocreate/ios::noreplace</code>. +</pre></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id418929"></a>No <code class="code">ios::nocreate/ios::noreplace</code>. </h4></div></div></div><p> The existence of <code class="code">ios::nocreate</code> being used for input-streams has been confirmed, most probably because the author thought it would be more correct to specify nocreate explicitly. So @@ -516,7 +516,7 @@ open the file for reading, check if it has been opened, and then decide whether you want to create/replace or not. To my knowledge, even older implementations support <code class="code">app</code>, <code class="code">ate</code> and <code class="code">trunc</code> (except for <code class="code">app</code> ?). -</p></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id474775"></a> +</p></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id418977"></a> No <code class="code">stream::attach(int fd)</code> </h4></div></div></div><p> Phil Edwards writes: It was considered and rejected for the ISO @@ -539,7 +539,7 @@ No <code class="code">stream::attach(int fd)</code> For another example of this, refer to <a class="ulink" href="http://www.josuttis.com/cppcode/fdstream.html" target="_top">fdstream example</a> by Nicolai Josuttis. -</p></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id572745"></a> +</p></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id474129"></a> Support for C++98 dialect. </h4></div></div></div><p>Check for complete library coverage of the C++1998/2003 standard. </p><pre class="programlisting"> @@ -607,7 +607,7 @@ AC_DEFUN([AC_HEADER_STDCXX_98], [ AC_DEFINE(STDCXX_98_HEADERS,,[Define if ISO C++ 1998 header files are present. ]) fi ]) -</pre></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id572772"></a> +</pre></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id474157"></a> Support for C++TR1 dialect. </h4></div></div></div><p>Check for library coverage of the TR1 standard. </p><pre class="programlisting"> @@ -684,7 +684,7 @@ AC_DEFUN([AC_HEADER_TR1_UNORDERED_SET], [ AC_DEFINE(HAVE_TR1_UNORDERED_SET,,[Define if tr1/unordered_set is present. ]) fi ]) -</pre></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id572816"></a> +</pre></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id474201"></a> Support for C++0x dialect. </h4></div></div></div><p>Check for baseline language coverage in the compiler for the C++0xstandard. </p><pre class="programlisting"> @@ -896,27 +896,27 @@ AC_DEFUN([AC_HEADER_UNORDERED_SET], [ AC_DEFINE(HAVE_UNORDERED_SET,,[Define if unordered_set is present. ]) fi ]) -</pre></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id572893"></a> +</pre></div><div class="sect3" lang="en" xml:lang="en"><div class="titlepage"><div><div><h4 class="title"><a id="id474278"></a> Container::iterator_type is not necessarily Container::value_type* </h4></div></div></div><p> This is a change in behavior from the previous version. Now, most <span class="type">iterator_type</span> typedefs in container classes are POD objects, not <span class="type">value_type</span> pointers. -</p></div></div><div class="bibliography"><div class="titlepage"><div><div><h3 class="title"><a id="backwards.biblio"></a>Bibliography</h3></div></div></div><div class="biblioentry"><a id="id572925"></a><p>[<abbr class="abbrev"> +</p></div></div><div class="bibliography"><div class="titlepage"><div><div><h3 class="title"><a id="backwards.biblio"></a>Bibliography</h3></div></div></div><div class="biblioentry"><a id="id474310"></a><p>[<abbr class="abbrev"> kegel41 </abbr>] <span class="title"><i> Migrating to GCC 4.1 </i>. </span><span class="author"><span class="firstname">Dan</span> <span class="surname">Kegel</span>. </span><span class="biblioid"> <a class="ulink" href="http://www.kegel.com/gcc/gcc4.html" target="_top"> </a> - . </span></p></div><div class="biblioentry"><a id="id572957"></a><p>[<abbr class="abbrev"> + . </span></p></div><div class="biblioentry"><a id="id474342"></a><p>[<abbr class="abbrev"> kegel41 </abbr>] <span class="title"><i> Building the Whole Debian Archive with GCC 4.1: A Summary </i>. </span><span class="author"><span class="firstname">Martin</span> <span class="surname">Michlmayr</span>. </span><span class="biblioid"> <a class="ulink" href="http://lists.debian.org/debian-gcc/2006/03/msg00405.html" target="_top"> </a> - . </span></p></div><div class="biblioentry"><a id="id572990"></a><p>[<abbr class="abbrev"> + . </span></p></div><div class="biblioentry"><a id="id474375"></a><p>[<abbr class="abbrev"> lbl32 </abbr>] <span class="title"><i> Migration guide for GCC-3.2 |