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The SGI STL and pre-1998 drafts of the C++ standard had a default argument for vector<bool>::insert(iterator, const bool&) which was remove by N1051. The default argument is still present in libstdc++ for some reason. There are no tests verifying it as an extension, so I don't think it has been kept intentionally. This removes the default argument but adds an overload without the second parameter, and adds the deprecated attribute to it. This allows any code using it to keep working (for now) but with a warning. libstdc++-v3/ChangeLog: PR libstdc++/104559 * doc/xml/manual/evolution.xml: Document deprecation. * doc/html/manual/api.html: Regenerate. * include/bits/stl_bvector.h (insert(const_iterator, const bool&)): Remove default argument. (insert(const_iterator)): New overload with deprecated attribute. * testsuite/23_containers/vector/bool/modifiers/insert/104559.cc: New test.
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>API Evolution and Deprecation History</title><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><meta name="keywords" content="ISO C++, api, evolution, deprecation, history" /><meta name="keywords" content="ISO C++, library" /><meta name="keywords" content="ISO C++, runtime, library" /><link rel="home" href="../index.html" title="The GNU C++ Library" /><link rel="up" href="appendix_porting.html" title="Appendix B. Porting and Maintenance" /><link rel="prev" href="abi.html" title="ABI Policy and Guidelines" /><link rel="next" href="backwards.html" title="Backwards Compatibility" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">API Evolution and Deprecation History</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="abi.html">Prev</a> </td><th width="60%" align="center">Appendix B.
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Porting and Maintenance
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</th><td width="20%" align="right"> <a accesskey="n" href="backwards.html">Next</a></td></tr></table><hr /></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="appendix.porting.api"></a>API Evolution and Deprecation History</h2></div></div></div><p>
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A list of user-visible changes, in chronological order
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</p><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="api.rel_300"></a><code class="constant">3.0</code></h3></div></div></div><p>
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Extensions moved to <code class="filename">include/ext</code>.
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</p><p>
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Include files from the SGI/HP sources that pre-date the ISO standard
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are added. These files are placed into
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the <code class="filename">include/backward</code> directory and a deprecated warning
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is added that notifies on inclusion (<code class="literal">-Wno-deprecated</code>
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deactivates the warning.)
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</p><p>Deprecated include <code class="filename"><backward/strstream></code> added.</p><p>Removal of include <code class="filename"><builtinbuf.h></code>, <code class="filename"><indstream.h></code>, <code class="filename"><parsestream.h></code>, <code class="filename"><PlotFile.h></code>, <code class="filename"><SFile.h></code>, <code class="filename"><stdiostream.h></code>, and <code class="filename"><stream.h></code>.
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</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="api.rel_310"></a><code class="constant">3.1</code></h3></div></div></div><p>
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</p><p>
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Extensions from SGI/HP moved from <code class="code">namespace std</code>
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to <code class="code">namespace __gnu_cxx</code>. As part of this, the following
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new includes are
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added: <code class="filename"><ext/algorithm></code>, <code class="filename"><ext/functional></code>, <code class="filename"><ext/iterator></code>, <code class="filename"><ext/memory></code>, and <code class="filename"><ext/numeric></code>.
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</p><p>
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Extensions to <code class="code">basic_filebuf</code> introduced: <code class="code">__gnu_cxx::enc_filebuf</code>, and <code class="code">__gnu_cxx::stdio_filebuf</code>.
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</p><p>
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Extensions to tree data structures added in <code class="filename"><ext/rb_tree></code>.
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</p><p>
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Removal of <code class="filename"><ext/tree></code>, moved to <code class="filename"><backward/tree.h></code>.
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</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="api.rel_320"></a><code class="constant">3.2</code></h3></div></div></div><p>
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</p><p>Symbol versioning introduced for shared library.</p><p>Removal of include <code class="filename"><backward/strstream.h></code>.</p><p>Allocator changes. Change <code class="code">__malloc_alloc</code> to <code class="code">malloc_allocator</code> and <code class="code">__new_alloc</code> to <code class="code">new_allocator</code>. </p><p> For GCC releases from 2.95 through the 3.1 series, defining
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<code class="literal">__USE_MALLOC</code> on the gcc command line would change the
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default allocation strategy to instead use <code class="code">malloc</code> and
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<code class="code">free</code>. For the 3.2 and 3.3 release series the same
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functionality was spelled <code class="literal">_GLIBCXX_FORCE_NEW</code>. From
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GCC 3.4 onwards the default allocator uses <code class="code">new</code> anyway,
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but for the optional pooling allocators the functionality is enabled by
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setting <code class="literal">GLIBCXX_FORCE_NEW</code> in the environment, see
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<a class="link" href="mt_allocator.html" title="Chapter 19. The mt_allocator">the mt allocator chapter</a>
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for details.
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</p><p>Error handling in iostreams cleaned up, made consistent. </p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="api.rel_330"></a><code class="constant">3.3</code></h3></div></div></div><p>
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</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="api.rel_340"></a><code class="constant">3.4</code></h3></div></div></div><p>
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</p><p>
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Large file support.
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</p><p> Extensions for generic characters and <code class="code">char_traits</code> added in <code class="filename"><ext/pod_char_traits.h></code>.
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||
</p><p>
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||
Support for <code class="code">wchar_t</code> specializations of <code class="code">basic_filebuf</code> enhanced to support <code class="code">UTF-8</code> and <code class="code">Unicode</code>, depending on host. More hosts support basic <code class="code">wchar_t</code> functionality.
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</p><p>
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Support for <code class="code">char_traits</code> beyond builtin types.
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</p><p>
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Conformant <code class="code">allocator</code> class and usage in containers. As
|
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part of this, the following extensions are
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added: <code class="filename"><ext/bitmap_allocator.h></code>, <code class="filename"><ext/debug_allocator.h></code>, <code class="filename"><ext/mt_allocator.h></code>, <code class="filename"><ext/malloc_allocator.h></code>,<code class="filename"><ext/new_allocator.h></code>, <code class="filename"><ext/pool_allocator.h></code>.
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</p><p>
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This is a change from all previous versions, and may require
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source-level changes due to allocator-related changes to structures
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names and template parameters, filenames, and file locations. Some,
|
||
like <code class="code">__simple_alloc, __allocator, __alloc, </code> and <code class="code">
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_Alloc_traits</code> have been removed.
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||
</p><p>Default behavior of <code class="code">std::allocator</code> has changed.</p><p>
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||
Previous versions prior to 3.4 cache allocations in a memory
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pool, instead of passing through to call the global allocation
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||
operators (i.e., <code class="classname">__gnu_cxx::pool_allocator</code>). More
|
||
recent versions default to the
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simpler <code class="classname">__gnu_cxx::new_allocator</code>.
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||
</p><p> Previously, all allocators were written to the SGI
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style, and all STL containers expected this interface. This
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interface had a traits class called <code class="code">_Alloc_traits</code> that
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attempted to provide more information for compile-time allocation
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selection and optimization. This traits class had another allocator
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wrapper, <code class="code">__simple_alloc<T,A></code>, which was a
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wrapper around another allocator, A, which itself is an allocator
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for instances of T. But wait, there's more:
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<code class="code">__allocator<T,A></code> is another adapter. Many of
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the provided allocator classes were SGI style: such classes can be
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changed to a conforming interface with this wrapper:
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<code class="code">__allocator<T, __alloc></code> is thus the same as
|
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<code class="code">allocator<T></code>.
|
||
</p><p> The class <code class="classname">allocator</code> used the typedef
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<span class="type">__alloc</span> to select an underlying allocator that
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||
satisfied memory allocation requests. The selection of this
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||
underlying allocator was not user-configurable.
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</p><div class="table"><a id="table.extension_allocators"></a><p class="title"><strong>Table B.6. Extension Allocators</strong></p><div class="table-contents"><table class="table" summary="Extension Allocators" border="1"><colgroup><col align="left" class="c1" /><col align="left" class="c2" /><col align="left" class="c3" /><col align="left" class="c4" /></colgroup><thead><tr><th align="left">Allocator (3.4)</th><th align="left">Header (3.4)</th><th align="left">Allocator (3.[0-3])</th><th align="left">Header (3.[0-3])</th></tr></thead><tbody><tr><td align="left"><code class="classname">__gnu_cxx::new_allocator<T></code></td><td align="left"><code class="filename"><ext/new_allocator.h></code></td><td align="left"><code class="classname">std::__new_alloc</code></td><td align="left"><code class="filename"><memory></code></td></tr><tr><td align="left"><code class="classname">__gnu_cxx::malloc_allocator<T></code></td><td align="left"><code class="filename"><ext/malloc_allocator.h></code></td><td align="left"><code class="classname">std::__malloc_alloc_template<int></code></td><td align="left"><code class="filename"><memory></code></td></tr><tr><td align="left"><code class="classname">__gnu_cxx::debug_allocator<T></code></td><td align="left"><code class="filename"><ext/debug_allocator.h></code></td><td align="left"><code class="classname">std::debug_alloc<T></code></td><td align="left"><code class="filename"><memory></code></td></tr><tr><td align="left"><code class="classname">__gnu_cxx::__pool_alloc<T></code></td><td align="left"><code class="filename"><ext/pool_allocator.h></code></td><td align="left"><code class="classname">std::__default_alloc_template<bool,int></code></td><td align="left"><code class="filename"><memory></code></td></tr><tr><td align="left"><code class="classname">__gnu_cxx::__mt_alloc<T></code></td><td align="left"><code class="filename"><ext/mt_allocator.h></code></td><td align="left"> </td><td align="left"> </td></tr><tr><td align="left"><code class="classname">__gnu_cxx::bitmap_allocator<T></code></td><td align="left"><code class="filename"><ext/bitmap_allocator.h></code></td><td align="left"> </td><td align="left"> </td></tr></tbody></table></div></div><br class="table-break" /><p> Releases after gcc-3.4 have continued to add to the collection
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||
of available allocators. All of these new allocators are
|
||
standard-style. The following table includes details, along with
|
||
the first released version of GCC that included the extension allocator.
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||
</p><div class="table"><a id="table.extension_allocators2"></a><p class="title"><strong>Table B.7. Extension Allocators Continued</strong></p><div class="table-contents"><table class="table" summary="Extension Allocators Continued" border="1"><colgroup><col align="left" class="c1" /><col align="left" class="c2" /><col align="left" class="c3" /></colgroup><thead><tr><th align="left">Allocator</th><th align="left">Include</th><th align="left">Version</th></tr></thead><tbody><tr><td align="left"><code class="classname">__gnu_cxx::array_allocator<T></code></td><td align="left"><code class="filename"><ext/array_allocator.h></code></td><td align="left">4.0.0</td></tr><tr><td align="left"><code class="classname">__gnu_cxx::throw_allocator<T></code></td><td align="left"><code class="filename"><ext/throw_allocator.h></code></td><td align="left">4.2.0</td></tr></tbody></table></div></div><br class="table-break" /><p>
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||
Debug mode first appears.
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||
</p><p>
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||
Precompiled header support <acronym class="acronym">PCH</acronym> support.
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||
</p><p>
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||
Macro guard for changed, from <code class="literal">_GLIBCPP_</code> to <code class="literal">_GLIBCXX_</code>.
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||
</p><p>
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||
Extension <code class="filename"><ext/stdio_sync_filebuf.h></code> added.
|
||
</p><p>
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||
Extension <code class="filename"><ext/demangle.h></code> added.
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||
</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="api.rel_400"></a><code class="constant">4.0</code></h3></div></div></div><p>
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||
</p><p>
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||
TR1 features first appear.
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||
</p><p>
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||
Extension allocator <code class="filename"><ext/array_allocator.h></code> added.
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||
</p><p>
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||
Extension <code class="code">codecvt</code> specializations moved to <code class="filename"><ext/codecvt_specializations.h></code>.
|
||
</p><p>
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||
Removal of <code class="filename"><ext/demangle.h></code>.
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||
</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="api.rel_410"></a><code class="constant">4.1</code></h3></div></div></div><p>
|
||
</p><p>
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||
Removal of <code class="filename"><cassert></code> from all standard headers: now has to be explicitly included for <code class="code">std::assert</code> calls.
|
||
</p><p> Extensions for policy-based data structures first added. New includes,
|
||
types, namespace <code class="code">pb_assoc</code>.
|
||
</p><p> Extensions for typelists added in <code class="filename"><ext/typelist.h></code>.
|
||
</p><p> Extension for policy-based <code class="code">basic_string</code> first added: <code class="code">__gnu_cxx::__versa_string</code> in <code class="filename"><ext/vstring.h></code>.
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||
</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="api.rel_420"></a><code class="constant">4.2</code></h3></div></div></div><p>
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||
</p><p> Default visibility attributes applied to <code class="code">namespace std</code>. Support for <code class="code">-fvisibility</code>.
|
||
</p><p>TR1 <code class="filename"><random></code>, <code class="filename"><complex></code>, and C compatibility headers added.</p><p> Extensions for concurrent programming consolidated
|
||
into <code class="filename"><ext/concurrence.h></code> and <code class="filename"><ext/atomicity.h></code>,
|
||
including change of namespace to <code class="code">__gnu_cxx</code> in some
|
||
cases. Added types
|
||
include <code class="code">_Lock_policy</code>, <code class="code">__concurrence_lock_error</code>, <code class="code">__concurrence_unlock_error</code>, <code class="code">__mutex</code>, <code class="code">__scoped_lock</code>.</p><p> Extensions for type traits consolidated
|
||
into <code class="filename"><ext/type_traits.h></code>. Additional traits are added
|
||
(<code class="code">__conditional_type</code>, <code class="code">__enable_if</code>, others.)
|
||
</p><p> Extensions for policy-based data structures revised. New includes,
|
||
types, namespace moved to <code class="code">__pb_ds</code>.
|
||
</p><p> Extensions for debug mode modified: now nested in <code class="code">namespace
|
||
std::__debug</code> and extensions in <code class="code">namespace
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||
__gnu_cxx::__debug</code>.</p><p> Extensions added: <code class="filename"><ext/typelist.h></code>
|
||
and <code class="filename"><ext/throw_allocator.h></code>.
|
||
</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="api.rel_430"></a><code class="constant">4.3</code></h3></div></div></div><p>
|
||
</p><p>
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||
C++0X features first appear.
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||
</p><p>TR1 <code class="filename"><regex></code> and <code class="filename"><cmath></code>'s mathematical special function added.
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||
</p><p>
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||
Backward include edit.
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||
</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>Removed</p><p>
|
||
<code class="filename"><algobase.h></code> <code class="filename"><algo.h></code> <code class="filename"><alloc.h></code> <code class="filename"><bvector.h></code> <code class="filename"><complex.h></code>
|
||
<code class="filename"><defalloc.h></code> <code class="filename"><deque.h></code> <code class="filename"><fstream.h></code> <code class="filename"><function.h></code> <code class="filename"><hash_map.h></code> <code class="filename"><hash_set.h></code>
|
||
<code class="filename"><hashtable.h></code> <code class="filename"><heap.h></code> <code class="filename"><iomanip.h></code> <code class="filename"><iostream.h></code> <code class="filename"><istream.h></code> <code class="filename"><iterator.h></code>
|
||
<code class="filename"><list.h></code> <code class="filename"><map.h></code> <code class="filename"><multimap.h></code> <code class="filename"><multiset.h></code> <code class="filename"><new.h></code> <code class="filename"><ostream.h></code> <code class="filename"><pair.h></code> <code class="filename"><queue.h></code> <code class="filename"><rope.h></code> <code class="filename"><set.h></code> <code class="filename"><slist.h></code> <code class="filename"><stack.h></code> <code class="filename"><streambuf.h></code> <code class="filename"><stream.h></code> <code class="filename"><tempbuf.h></code>
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||
<code class="filename"><tree.h></code> <code class="filename"><vector.h></code>
|
||
</p></li><li class="listitem"><p>Added</p><p>
|
||
<code class="filename"><hash_map></code> and <code class="filename"><hash_set></code>
|
||
</p></li><li class="listitem"><p>Added in C++11</p><p>
|
||
<code class="filename"><auto_ptr.h></code> and <code class="filename"><binders.h></code>
|
||
</p></li></ul></div><p>
|
||
Header dependency streamlining.
|
||
</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p><code class="filename"><algorithm></code> no longer includes <code class="filename"><climits></code>, <code class="filename"><cstring></code>, or <code class="filename"><iosfwd></code> </p></li><li class="listitem"><p><code class="filename"><bitset></code> no longer includes <code class="filename"><istream></code> or <code class="filename"><ostream></code>, adds <code class="filename"><iosfwd></code> </p></li><li class="listitem"><p><code class="filename"><functional></code> no longer includes <code class="filename"><cstddef></code></p></li><li class="listitem"><p><code class="filename"><iomanip></code> no longer includes <code class="filename"><istream></code>, <code class="filename"><istream></code>, or <code class="filename"><functional></code>, adds <code class="filename"><ioswd></code> </p></li><li class="listitem"><p><code class="filename"><numeric></code> no longer includes <code class="filename"><iterator></code></p></li><li class="listitem"><p><code class="filename"><string></code> no longer includes <code class="filename"><algorithm></code> or <code class="filename"><memory></code></p></li><li class="listitem"><p><code class="filename"><valarray></code> no longer includes <code class="filename"><numeric></code> or <code class="filename"><cstdlib></code></p></li><li class="listitem"><p><code class="filename"><tr1/hashtable></code> no longer includes <code class="filename"><memory></code> or <code class="filename"><functional></code></p></li><li class="listitem"><p><code class="filename"><tr1/memory></code> no longer includes <code class="filename"><algorithm></code></p></li><li class="listitem"><p><code class="filename"><tr1/random></code> no longer includes <code class="filename"><algorithm></code> or <code class="filename"><fstream></code></p></li></ul></div><p>
|
||
Debug mode for <code class="filename"><unordered_map></code> and <code class="filename"><unordered_set></code>.
|
||
</p><p>
|
||
Parallel mode first appears.
|
||
</p><p>Variadic template implementations of items in <code class="filename"><tuple></code> and
|
||
<code class="filename"><functional></code>.
|
||
</p><p>Default <code class="code">what</code> implementations give more elaborate
|
||
exception strings for <code class="code">bad_cast</code>,
|
||
<code class="code">bad_typeid</code>, <code class="code">bad_exception</code>, and
|
||
<code class="code">bad_alloc</code>.
|
||
</p><p>
|
||
PCH binary files no longer installed. Instead, the source files are installed.
|
||
</p><p>
|
||
Namespace pb_ds moved to __gnu_pb_ds.
|
||
</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="api.rel_440"></a><code class="constant">4.4</code></h3></div></div></div><p>
|
||
</p><p>
|
||
C++0X features.
|
||
</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>
|
||
Added.
|
||
</p><p>
|
||
<code class="filename"><atomic></code>,
|
||
<code class="filename"><chrono></code>,
|
||
<code class="filename"><condition_variable></code>,
|
||
<code class="filename"><forward_list></code>,
|
||
<code class="filename"><initializer_list></code>,
|
||
<code class="filename"><mutex></code>,
|
||
<code class="filename"><ratio></code>,
|
||
<code class="filename"><thread></code>
|
||
</p></li><li class="listitem"><p>
|
||
Updated and improved.
|
||
</p><p>
|
||
<code class="filename"><algorithm></code>,
|
||
<code class="filename"><system_error></code>,
|
||
<code class="filename"><type_traits></code>
|
||
</p></li><li class="listitem"><p>
|
||
Use of the GNU extension namespace association converted to inline namespaces.
|
||
</p></li><li class="listitem"><p>
|
||
Preliminary support for <code class="classname">initializer_list</code>
|
||
and defaulted and deleted constructors in container classes.
|
||
</p></li><li class="listitem"><p>
|
||
<code class="classname">unique_ptr</code>.
|
||
</p></li><li class="listitem"><p>
|
||
Support for new character types <span class="type">char16_t</span>
|
||
and <span class="type">char32_t</span> added
|
||
to <code class="classname">char_traits</code>, <code class="classname">basic_string</code>, <code class="classname">numeric_limits</code>,
|
||
and assorted compile-time type traits.
|
||
</p></li><li class="listitem"><p>
|
||
Support for string conversions <code class="function">to_string</code>
|
||
and <code class="function">to_wstring</code>.
|
||
</p></li><li class="listitem"><p>
|
||
Member functions taking string arguments were added to iostreams
|
||
including <code class="classname">basic_filebuf</code>, <code class="classname">basic_ofstream</code>,
|
||
and <code class="classname">basic_ifstream</code>.
|
||
</p></li><li class="listitem"><p>
|
||
Exception propagation support,
|
||
including <code class="classname">exception_ptr</code>, <code class="function">current_exception</code>, <code class="function">copy_exception</code>,
|
||
and <code class="function">rethrow_exception</code>.
|
||
</p></li></ul></div><p>
|
||
Uglification of <code class="literal">try</code> to <code class="literal">__try</code>
|
||
and <code class="literal">catch</code> to <code class="literal">__catch</code>.
|
||
</p><p>
|
||
Audit of internal mutex usage, conversion to functions returning static
|
||
local mutex.
|
||
</p><p> Extensions
|
||
added: <code class="filename"><ext/pointer.h></code>
|
||
and <code class="filename"><ext/extptr_allocator.h></code>. Support
|
||
for non-standard pointer types has been added
|
||
to <code class="classname">vector</code>
|
||
and <code class="classname">forward_list</code>.
|
||
</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="api.rel_450"></a><code class="constant">4.5</code></h3></div></div></div><p>
|
||
</p><p>
|
||
C++0X features.
|
||
</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>
|
||
Added.
|
||
</p><p>
|
||
<code class="filename"><functional></code>,
|
||
<code class="filename"><future></code>,
|
||
<code class="filename"><random></code>
|
||
</p></li><li class="listitem"><p>
|
||
Updated and improved.
|
||
</p><p>
|
||
<code class="filename"><atomic></code>,
|
||
<code class="filename"><system_error></code>,
|
||
<code class="filename"><type_traits></code>
|
||
</p></li><li class="listitem"><p>
|
||
Add support for explicit operators and standard layout types.
|
||
</p></li></ul></div><p>
|
||
Profile mode first appears.
|
||
</p><p>
|
||
Support for decimal floating-point arithmetic, including <code class="classname">decimal32</code>, <code class="classname">decimal64</code>, and <code class="classname">decimal128</code>.
|
||
</p><p>
|
||
Python pretty-printers are added for use with appropriately-advanced versions of <span class="command"><strong>gdb</strong></span>.
|
||
</p><p>
|
||
Audit for application of function attributes nothrow, const, pure, and noreturn.
|
||
</p><p>
|
||
The default behavior for comparing typeinfo names changed, so
|
||
in <code class="filename"><typeinfo></code>, <code class="literal">__GXX_MERGED_TYPEINFO_NAMES</code>
|
||
now defaults to zero.
|
||
</p><p> Extensions modified: <code class="filename"><ext/throw_allocator.h></code>.
|
||
</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="api.rel_460"></a><code class="constant">4.6</code></h3></div></div></div><p>
|
||
Use constexpr and nullptr where appropriate throughout the library.
|
||
</p><p>
|
||
The library was updated to avoid including
|
||
<code class="filename"><stddef.h></code> in order
|
||
to reduce namespace pollution.
|
||
</p><p>Reference-count annotations to assist data race detectors.
|
||
</p><p>
|
||
Added <code class="function">make_exception_ptr</code> as an alias of
|
||
<code class="function">copy_exception</code>.
|
||
</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="api.rel_470"></a><code class="constant">4.7</code></h3></div></div></div><p>Use of noexcept throughout library.</p><p>Partial support for C++11 allocators first appears.</p><p>
|
||
<code class="classname">monotonic_clock</code> renamed to
|
||
<code class="classname">steady_clock</code> as required by the final C++11
|
||
standard.
|
||
</p><p>A new clocale model for newlib is available.</p><p>
|
||
The library was updated to avoid including
|
||
<code class="filename"><unistd.h></code> in order
|
||
to reduce namespace pollution.
|
||
</p><p>Debug Mode was improved for unordered containers. </p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="api.rel_480"></a><code class="constant">4.8</code></h3></div></div></div><p>
|
||
New random number engines and distributions.
|
||
Optimisations for random.
|
||
</p><p>New --enable-libstdcxx-verbose configure option</p><p>
|
||
The --enable-libstdcxx-time configure option becomes unnecessary given a
|
||
sufficiently recent glibc.
|
||
</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="api.rel_490"></a><code class="constant">4.9</code></h3></div></div></div><p> Implementation of <code class="classname">regex</code> completed. </p><p> C++14 library and TS implementations are added. </p><p> <code class="function">copy_exception</code> deprecated. </p><p> <code class="classname">__gnu_cxx::array_allocator</code> deprecated. </p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="api.rel_51"></a><code class="constant">5</code></h3></div></div></div><p>
|
||
ABI transition adds new implementations of several components, using the
|
||
<code class="code">abi_tag</code> attribute and the <code class="code">__cxx11</code> inline
|
||
namespace to distinguish the new entities from the old ones.
|
||
</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>
|
||
Use of the new or old ABI can be selected per-translation unit with the
|
||
<a class="xref" href="using_macros.html" title="Macros">Macros</a>.
|
||
</p></li><li class="listitem"><p>
|
||
New non-reference-counted <code class="classname">string</code> implementation.
|
||
</p></li><li class="listitem"><p>
|
||
New <code class="classname">list</code> implementation containing a new
|
||
data member in order to provide O(1) <code class="function">size()</code>.
|
||
</p></li><li class="listitem"><p>
|
||
New <code class="classname">ios_base::failure</code> implementation inheriting
|
||
from <code class="classname">system_error</code>.
|
||
</p></li></ul></div><p>
|
||
C++11 support completed (movable iostreams, new I/O manipulators,
|
||
Unicode conversion utilities, atomic operations for
|
||
<code class="classname">shared_ptr</code>, functions for notifying condition
|
||
variables and making futures ready at thread exit).
|
||
</p><p>
|
||
Changed formatting of floating point types when
|
||
<code class="code">ios_base::fixed|ios_base::scientific</code> is set in a stream's
|
||
format flags.
|
||
</p><p> Improved C++14 support and TS implementations. </p><p> New random number engines and distributions. </p><p>
|
||
GDB Xmethods for containers and <code class="classname">unique_ptr</code> added.
|
||
</p><p>
|
||
<code class="classname">has_trivial_default_constructor</code>,
|
||
<code class="classname">has_trivial_copy_constructor</code> and
|
||
<code class="classname">has_trivial_copy_assign</code> deprecated.
|
||
</p><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="api.rel_53"></a><code class="constant">5.3</code></h4></div></div></div><p> Experimental implementation of the C++ Filesystem TS added. </p></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="api.rel_61"></a><code class="constant">6</code></h3></div></div></div><p> C++14 support completed. </p><p>
|
||
Support for mathematical special functions (ISO/IEC 29124:2010) added.
|
||
</p><p>
|
||
Assertions to check function preconditions can be enabled by defining the
|
||
<a class="link" href="using_macros.html" title="Macros"><span class="symbol">_GLIBCXX_ASSERTIONS</span>
|
||
macro</a>.
|
||
The initial set of assertions are a subset of the checks enabled by
|
||
the Debug Mode, but without the ABI changes and changes to algorithmic
|
||
complexity that are caused by enabling the full Debug Mode.
|
||
</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="api.rel_71"></a><code class="constant">7</code></h3></div></div></div><p>
|
||
The type of exception thrown by iostreams changed to the <code class="code">cxx11</code>
|
||
ABI version of <code class="classname">std::ios_base::failure</code>.
|
||
</p><p>
|
||
Experimental C++17 support added, including most new library features.
|
||
The meaning of <code class="classname">shared_ptr<T[]></code> changed to
|
||
match the C++17 semantics.
|
||
</p><p>
|
||
<a class="xref" href="using_macros.html" title="Macros">Macros</a> added.
|
||
</p><p>
|
||
<code class="classname">has_trivial_default_constructor</code>,
|
||
<code class="classname">has_trivial_copy_constructor</code> and
|
||
<code class="classname">has_trivial_copy_assign</code> removed.
|
||
</p><p> Profile Mode was deprecated. </p><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="api.rel_72"></a><code class="constant">7.2</code></h4></div></div></div><p>
|
||
Library Fundamentals TS header
|
||
<code class="filename"><experimental/source_location></code>
|
||
added.
|
||
</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="api.rel_73"></a><code class="constant">7.3</code></h4></div></div></div><p>
|
||
Including new C++14 or C++17 headers without a suitable <code class="option">-std</code>
|
||
no longer causes compilation to fail via <code class="literal">#error</code>.
|
||
Instead the header is simply empty and doesn't define anything.
|
||
</p></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="api.rel_81"></a><code class="constant">8</code></h3></div></div></div><p>
|
||
The exceptions thrown by iostreams can now be caught by handlers for either
|
||
version of <code class="classname">std::ios_base::failure</code>.
|
||
</p><p>
|
||
Improved experimental C++17 support. Headers
|
||
<code class="filename"><charconv></code> and
|
||
<code class="filename"><filesystem></code>.
|
||
Experimental implementation of the C++17 Filesystem library added.
|
||
</p><p>
|
||
Experimental C++2a support
|
||
(<code class="function">to_address</code> and <code class="classname">endian</code>).
|
||
</p><p>
|
||
AddressSanitizer annotations added to <code class="classname">std::vector</code>
|
||
to detect out-of-range accesses to the unused capacity of a vector.
|
||
</p><p>
|
||
<code class="function">std::char_traits<char16_t>::to_int_type(u'\uFFFF')</code>
|
||
now returns <code class="literal">0xFFFD</code>, as <code class="literal">0xFFFF</code> is
|
||
used for <code class="function">std::char_traits<char16_t>::eof()</code>.
|
||
</p><p>
|
||
The extension allowing arithmetic on
|
||
<code class="classname">std::atomic<void*></code> and types like
|
||
<code class="classname">std::atomic<R(*)()></code> was deprecated.
|
||
</p><p>
|
||
The <code class="function">std::uncaught_exception</code> function was deprecated
|
||
for C++17 mode.
|
||
</p><p>
|
||
The nested typedefs <span class="type">std::hash::result_type</span> and
|
||
<span class="type">std::hash::argument_type</span> were deprecated for C++17 mode.
|
||
</p><p>
|
||
The deprecated iostream members <span class="type">ios_base::io_state</span>,
|
||
<span class="type">ios_base::open_mode</span>, <span class="type">ios_base::seek_dir</span>, and
|
||
<code class="function">basic_streambuf::stossc</code> were removed for C++17 mode.
|
||
</p><p>
|
||
The non-standard C++0x <code class="function">std::copy_exception</code> function
|
||
was removed.
|
||
</p><p>
|
||
For <code class="option">-std=c++11</code>, <code class="option">-std=c++14</code>, and
|
||
<code class="option">-std=c++17</code> modes the <code class="filename"><complex.h></code>
|
||
header no longer includes the C99 <code class="filename"><complex.h></code>
|
||
header.
|
||
</p><p>
|
||
For the non-default <code class="option">--enable-symvers=gnu-versioned-namespace</code>
|
||
configuration, the shared library SONAME has been changed to
|
||
<code class="filename">libstdc++.so.8</code>.
|
||
</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="api.rel_91"></a><code class="constant">9</code></h3></div></div></div><p>
|
||
C++17 header
|
||
<code class="filename"><memory_resource></code>
|
||
added.
|
||
</p><p>
|
||
Experimental C++2a support improved, with new headers
|
||
<code class="filename"><bit></code> and
|
||
<code class="filename"><version></code> added.
|
||
Support for new character type <span class="type">char8_t</span> added
|
||
to <code class="classname">char_traits</code>, <code class="classname">basic_string</code>,
|
||
<code class="classname">numeric_limits</code>,
|
||
and relevant locale facets and type traits.
|
||
</p><p>
|
||
Experimental implementation of the Networking TS library added,
|
||
with new headers
|
||
<code class="filename"><experimental/buffer></code>,
|
||
<code class="filename"><experimental/executor></code>,
|
||
<code class="filename"><experimental/internet></code>,
|
||
<code class="filename"><experimental/io_context></code>,
|
||
<code class="filename"><experimental/net></code>,
|
||
<code class="filename"><experimental/netfwd></code>,
|
||
<code class="filename"><experimental/socket></code>,
|
||
and
|
||
<code class="filename"><experimental/timer></code>.
|
||
</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="api.rel_101"></a><code class="constant">10</code></h3></div></div></div><p> Deprecated features removed:
|
||
</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"> Profile Mode </li><li class="listitem"><code class="classname">__gnu_cxx::array_allocator</code></li></ul></div><p>
|
||
</p><p>
|
||
The non-standard <code class="function">std::__is_nullptr_t</code> type trait
|
||
was deprecated.
|
||
</p><p>
|
||
The <code class="classname">std::packaged_task</code> constructors taking
|
||
an allocator argument are only defined for C++11 and C++14.
|
||
</p><p>
|
||
Several members of <code class="classname">std::allocator</code> were removed
|
||
for C++20 mode. The removed functionality has been provided by
|
||
<code class="classname">std::allocator_traits</code> since C++11 and that should
|
||
be used instead.
|
||
</p><p>
|
||
The type of the <code class="classname">std::iterator</code> base class of
|
||
<code class="classname">std::istreambuf_iterator</code> was changed to be
|
||
consistent for all <code class="option">-std</code> modes.
|
||
Before GCC 10.1 the base class had one type in C++98 mode and a
|
||
different type in C++11 and later modes. The type in C++98 mode
|
||
was changed to be the same as for C++11 and later.
|
||
</p><p>
|
||
Experimental C++2a support improved, with new headers
|
||
<code class="filename"><concepts></code>,
|
||
<code class="filename"><ranges></code>,
|
||
<code class="filename"><compare></code>,
|
||
<code class="filename"><coroutine></code>,
|
||
<code class="filename"><numbers></code>,
|
||
<code class="filename"><span></code>,
|
||
and
|
||
<code class="filename"><stop_token></code>
|
||
added.
|
||
</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="api.rel_111"></a><code class="constant">11</code></h3></div></div></div><p>
|
||
The <code class="option">--enable-cheaders=c_std</code> configuration
|
||
was deprecated.
|
||
</p><p>
|
||
When compiling as C++20, the <code class="function">operator>></code> overloads
|
||
for extracting strings into character buffers only work with arrays,
|
||
not raw pointers.
|
||
</p><p>
|
||
<code class="code">std::string::reserve(n)</code> will no longer reduce
|
||
the string's capacity.
|
||
Calling <code class="function">reserve()</code> with no arguments is equivalent
|
||
to <code class="function">shrink_to_fit()</code>, but is deprecated.
|
||
<code class="function">shrink_to_fit()</code> should be used instead.
|
||
</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="api.rel_121"></a><code class="constant">12</code></h3></div></div></div><p>
|
||
The <code class="function">std::random_shuffle</code> algorithms are deprecated
|
||
for C++14 and later. The C++11 <code class="function">std::shuffle</code> algorithm
|
||
can be used instead.
|
||
</p><p>
|
||
The <code class="function">std::unexpected</code> function and related typedef and
|
||
accessors for the unexpected handler are deprecated for C++11 and later.
|
||
Dynamic exception specifications should be replaced with <code class="code">noexcept</code>.
|
||
</p><p>
|
||
C++98 adaptable function utilities
|
||
(<code class="code">std::bind1st</code>, <code class="code">std::unary_function</code>,
|
||
<code class="code">std::ptr_fun</code>, <code class="code">std::mem_fun_ref</code> etc.)
|
||
were deprecated for C++11.
|
||
<code class="code">std::iterator</code>, <code class="code">std::raw_storage_iterator</code>,
|
||
<code class="code">get_temporary_buffer</code>, and <code class="code">std::not_fun</code>
|
||
were deprecated for C++17.
|
||
</p><p>
|
||
Non-standard <code class="code">std::pair</code> constructors were deprecated.
|
||
A non-standard default argument for
|
||
<code class="code">vector<bool>::insert(const_iterator, const bool&)</code>
|
||
was deprecated.
|
||
</p><p>
|
||
The <code class="literal">bitmap</code>, <code class="literal">mt</code>, and <code class="literal">pool</code>
|
||
options for <code class="option">--enable-libstdcxx-allocator</code> were removed.
|
||
For the <code class="literal">new</code> option, <code class="classname">std::allocator</code>
|
||
no longer derives from <code class="classname">__gnu_cxx::new_allocator</code>;
|
||
they both derive from <code class="classname">std::__new_allocator</code> instead.
|
||
</p><p>
|
||
<code class="function">std::condition_variable::wait</code> changed to be
|
||
<code class="code">noexcept(false)</code> to allow thread cancellation exceptions to
|
||
be thrown from <code class="function">pthread_cond_wait</code> without aborting
|
||
the process.
|
||
</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="abi.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="appendix_porting.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="backwards.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">ABI Policy and Guidelines </td><td width="20%" align="center"><a accesskey="h" href="../index.html">Home</a></td><td width="40%" align="right" valign="top"> Backwards Compatibility</td></tr></table></div></body></html> |