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index.html ([5.2]): Mention TR1 and point to paragraph [5.5], describing it.
2006-01-24 Ed Smith-Rowland <3dw4rd@verizon.net> * docs/html/faq/index.html ([5.2]): Mention TR1 and point to paragraph [5.5], describing it. ([5.5]): New. * docs/html/ext/tr1.html: New. From-SVN: r110165
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Ed Smith-Rowland
Paolo Carlini
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2006-01-24 Ed Smith-Rowland <3dw4rd@verizon.net>
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* docs/html/faq/index.html ([5.2]): Mention TR1 and point to
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paragraph [5.5], describing it.
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([5.5]): New.
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* docs/html/ext/tr1.html: New.
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2006-01-20 Benjamin Kosnik <bkoz@redhat.com>
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* acinclude.m4 (GLIBCXX_CHECK_LINKER_FEATURES): Verbose ld version
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libstdc++-v3/docs/html/ext/tr1.html
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libstdc++-v3/docs/html/ext/tr1.html
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@ -113,7 +113,7 @@
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<li><a href="#5_2">What's next after libstdc++-v3?</a> </li>
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<li><a href="#5_3">What about the STL from SGI?</a> </li>
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<li><a href="#5_4">Extensions and Backward Compatibility</a> </li>
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<li><a href="#5_5">[removed]</a> </li>
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<li><a href="#5_5">Does libstdc++ support TR1?</a> </li>
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<li><a href="#5_6">Is libstdc++-v3 thread-safe?</a> </li>
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<li><a href="#5_7">How do I get a copy of the ISO C++ Standard?</a> </li>
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<li><a href="#5_8">What's an ABI and why is it so messy?</a> </li>
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@ -868,7 +868,7 @@ http://clisp.cons.org/~haible/gccinclude-glibc-2.2-compat.diff
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<li><p>The ISO Committee will meet periodically to review Defect Reports
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in the C++ Standard. Undoubtedly some of these will result in
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changes to the Standard, which will be reflected in patches to
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libstdc++. Some of that is already happening, see 4.2. Some of
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libstdc++. Some of that is already happening, see <a href="#4_3">4.3</a>. Some of
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those changes are being predicted by the library maintainers, and
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we add code to the library based on what the current proposed
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resolution specifies. Those additions are listed in
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@ -891,6 +891,13 @@ http://clisp.cons.org/~haible/gccinclude-glibc-2.2-compat.diff
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Bugfixes and rewrites (to improve or fix thread safety, for
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instance) will of course be a continuing task.
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</p></li>
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<li><p>There is an effort underway to add significant extensions to
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the standard library specification. The latest version of this effort is
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described in
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<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1836.pdf">
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The C++ Library Technical Report 1</a>.
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See <a href="#5_5">5.5</a>.
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</p></li>
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</ol>
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<p><a href="http://gcc.gnu.org/ml/libstdc++/1999/msg00080.html">This
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question</a> about the next libstdc++ prompted some brief but
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@ -930,6 +937,13 @@ http://clisp.cons.org/~haible/gccinclude-glibc-2.2-compat.diff
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e.g., <code><sys/stat.h></code>, <code><X11/Xlib.h></code>.
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</p>
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<p>At this time most of the features of the SGI STL extension have been
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replaced by standardized libraries.
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In particular, the unordered_map and unordered_set containers of TR1
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are suitable replacement for the non-standard hash_map and hash_set
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containers in the SGI STL. See <a href="#5_5">5.5</a> for more details.
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</p>
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<p>The extensions are no longer in the global or <code>std</code>
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namespaces, instead they are declared in the <code>__gnu_cxx</code>
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namespace. For maximum portability, consider defining a namespace
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@ -966,9 +980,66 @@ http://clisp.cons.org/~haible/gccinclude-glibc-2.2-compat.diff
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</p>
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<hr />
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<h2><a name="5_5">5.5 [removed]</a></h2>
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<p>This question has become moot and has been removed. The stub
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is here to preserve numbering (and hence links/bookmarks).
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<h2><a name="5_5">5.5 Does libstdc++ support TR1?</a></h2>
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<p>The C++ Standard Library Technical Report adds many new features to the library.
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The latest version of this effort is described in
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<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1836.pdf">
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Technical Report 1</a>.
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</p>
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<p>libstdc++ strives to implement all of TR1.
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The libstdc++ implementation status of the TR1 draft is listed in
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<a href="../ext/tr1.html">this page</a>.
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</p>
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<p>Briefly, the features of TR1 and the current status are:
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</p>
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<p><strong>Unordered containers - Complete -</strong>
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The unordered_set, unordered_map, unordered_multiset, and unordered_multimap containers
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are hashed versions of the map, set, multimap, and multiset containers respectively.
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These classes are suitable replacements for the SGI STL hash_map and hash_set extensions.
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</p>
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<p><strong>Reference-counted smart pointers - Complete -</strong>
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The shared_ptr and weak_ptr allow several object to know about a pointer and whether it is valid.
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When the last reference to the pointer is destroyed the pointer is freed.
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</p>
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<p><strong>Type traits - Complete -</strong>
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The type_traits class gives templates the ability to probe information about the input type
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and enable type-dependent logic to be performed without the need of template specializations.
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</p>
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<p><strong>Fixed-size arrays - Complete -</strong>
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The array class implements small fixed-sized arrays with container semantics.
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</p>
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<p><strong>Tuples - Complete -</strong>
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The tuple class implements small heterogeneous arrays. This is an enhanced pair.
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In fact, the standard pair is enhanced with a tuple interface.
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</p>
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<p><strong>A regular expression engine</strong>
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This library provides for regular expression objects with traversal of
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text with return of subexpressions.
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</p>
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<p><strong>A random number engine</strong>
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This library contains randow number generators with several different choices
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of distribution.
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</p>
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<p><strong>Special functions - Under construction - </strong>
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Twenty-three mathematical functions familiar to physicists and engineers are included:
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cylindrical and spherical Bessel and Neumann functions, hypergeometric functions,
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Laguerre polynomials, Legendre functions, elliptic integrals, exponential integrals
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and the Riemann zeta function all for your computing pleasure.
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</p>
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<p><strong>C99 compatibility - Under construction - </strong>
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There are many features designed to minimize the divergence of the C and the C++ languages.
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</p>
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<hr />
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