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<TITLE>MFC Programmer's SourceBook : STL Programmer's Guide</TITLE>
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content="A freely available implementation
of the C++ Standard Template Library, including
hypertext documentation.">
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<h1>What's New</h1>
<H2>Release 3.12: February 2, 1999</H2>
<P>
<UL>
<LI> Minor bug fixes.
<LI> The <A Href="string/index.htm"><string></A> and
<A Href="bitset/index.htm"><bitset></A> headers are now supported on
compilers that lack full support for member templates and partial
specialization, such as Microsoft v6.0.
<LI> Code to support multithreading has been consolidated in a single
file, so that system dependences are better isolated.
</UL>
<H2>Release 3.11: July 21, 1998</H2>
<UL>
<LI> Minor bug fixes.
<LI> Faster <tt>operator[]</tt> in <tt><A href="Map.html">map</A></tt>.
<LI> Algorithmic improvements in <tt><A href="find.html">find</A></tt>,
<tt><A href="find_if.html">find_if</A></tt>, and <tt><A href="partition.html" tppabs="http://www.sgi.com/Technology/STL/partition.shtml">partition</A></tt>.
<LI> The <A Href="stdexcept/index.htm">standard exception hierarchy</A> is
now usable on compilers that do not provide an
<tt><exception></tt> header.
</UL>
<H2>Release 3.1: June 9, 1998</H2>
This release provides several new features.
<UL>
<LI> Standard-conforming <tt><A href="basic_string.html">string</A></tt> and
<tt><A href="bitset.html">bitset</A></tt> classes, and the
<A Href="stdexcept/index.htm">standard exception hierarchy</A>.
<LI> Standard-conforming allocators, including the default allocator
class <tt>allocator<T></tt>. All containers now use
standard allocators, and all containers now support allocators
whose instances are distinct. Old-style allocators, like <tt>alloc</tt>,
are still supported for backward compatibility.
<LI> Algorithmic improvements in <tt><A href="search.html">search</A></tt>.
<LI> All sequences now support the <tt>resize</tt> and <tt>assign</tt>
member functions. All sequences now properly support overloaded
<tt>insert</tt> member functions and constructors in the presence
of member templates.
<LI> Bug fixes in <tt><A href="Rope.html">rope</A></tt>, and minor bug fixes elsewhere.
Minor changes for standard conformance.
<LI> Standard-conforming <tt>auto_ptr</tt> class.
<LI> Internal names, such as names of function and template
parameters, have been changed so that they cannot conflict with
user names (including user macros).
</UL>
<H2>Release 3.01: October 31, 1997</H2>
This is a minor release. It consists only of bug fixes (the most
important ones are in <tt><A href="Rope.html">rope</A></tt>), small changes to reflect
changes in the Final Draft International Standard (FDIS), and
performance improvements in single-element insertion into containers.
<H2>Release 3.0: October 31, 1997</H2>
<UL>
<LI> Major reorganization of header files. Headers now have the names
described in the draft C++ standard. (Old header names are
provided as well for backward compatibility.) The new-style
headers declare their contents in namespace <tt>std</tt>; the
old-style headers do too, but they import those declarations into
the global namespace with using declarations. So, for example,
<tt>#include <vector.h></tt> is roughly equivalent to
<tt>#include <vector></tt> followed by the declaration
<tt>using std::vector;</tt>.
<P>
Note that namespace <tt>std</tt> is only enabled for compilers
whose support for namespaces is sufficient; this is controlled by
the header <tt><stl_config.h></tt>.
<LI> Bug fixes, and minor changes for standard conformance.
</UL>
<H2>Release 2.03: September 9, 1997</H2>
<UL>
<LI> Bug fixes, most importantly in <tt><A href="Rope.html">rope</A></tt>.
<LI> New version of <tt>reverse_iterator</tt> that takes only a single
template parameter, as described in the draft standard. (This
relies on <tt><A href="iterator_traits.html">iterator_traits</A></tt>, so you can only use
the new version of <tt>reverse_iterator</tt> if your compiler
supports partial specialization.)
<LI> New algorithms: <tt><A href="find_first_of.html">find_first_of</A></tt>,
<tt><A href="search_n.html">search_n</A></tt>, <tt><A href="find_end.html" tppabs="http://www.sgi.com/Technology/STL/find_end.shtml">find_end</A></tt>
<LI> Changed the <A href="iterator_tags.html">iterator tag</A> classes so that they form an
inheritance hierarchy.
<LI> Added the <tt>-></tt> operator to all predefined iterators
(except for output iterators).
</UL>
<H2>Release 2.02: July 31, 1997</H2>
<UL>
<LI>Bug fixes, most importantly in
<tt><A Href="Rope.html">rope</A></tt> and
<tt><A Href="Deque.html">deque</A></tt>.
<LI>New feature: function object adaptors for member functions.
This is a family of classes:
<tt><A Href="mem_fun_t.html">mem_fun_t</A></tt>,
<tt><A Href="mem_fun_ref_t.html">mem_fun_ref_t</A></tt>,
<tt><A Href="mem_fun1_t.html">mem_fun1_t</A></tt>,
<tt><A Href="mem_fun1_ref_t.html">mem_fun1_ref_t</A></tt>.
</UL>
<H2>Release 2.01: June 30, 1997</H2>
Bug fixes only, no new features.
<H2>Release 2.0: June 13, 1997</H2>
This is a major release, with many new features. Here are some of the
most important.
<UL>
<LI>Exception safety. All STL components are now exception safe.
<LI>New container class: <tt><A Href="Rope.html">rope</A></tt>. A scalable
string representation.
<LI>New container class: <tt><A Href="Slist.html">slist</A></tt>. Singly
linked lists.
<LI>Member templates. If your compiler supports member templates,
then you will be able to use the fully general form of containers'
copy constructors and <tt>insert</tt> member functions.
<LI>New mechanism for accessing <A href="Iterators.html">iterators</A>'
associated type information: <tt><A Href="iterator_traits.html">iterator_traits</A></tt>.
(Note: you can only use <tt><A Href="iterator_traits.html">iterator_traits</A></tt>
if your compiler supports "partial specialization".)
The algorithms
<tt><A href="count.html">count</A></tt>, <tt><A href="count_if.html" tppabs="http://www.sgi.com/Technology/STL/count_if.shtml">count_if</A></tt>,
and <tt><A href="distance.html">distance</A></tt> have been rewritten in
terms of <tt><A Href="iterator_traits.html">iterator_traits</A></tt>.
<LI>Reimplementation of <tt><A Href="Deque.html">deque</A></tt>.
<tt><A Href="Deque.html">deque</A></tt> has been completely rewritten,
for higher performance.
<LI><tt>type_traits</tt> mechanism, which allows omission of null
constructor and destructor calls.
<LI>New <tt><A href="temporary_buffer.html">temporary_buffer</A></tt>
class. This was partially motivated by exception safety, but it
is also more convenient and more efficient than the old
<tt><A href="get_temporary_buffer.html">get_temporary_buffer</A></tt>
and <tt><A href="return_temporary_buffer.html">return_temporary_buffer</A></tt>
functions.
<LI>New allocator, <tt>debug_alloc</tt>, which is useful for verifying
the correctness of memory allocation and deallocation.
<LI>New algorithms:
<tt><A href="copy_n.html">copy_n</A></tt>,
<tt><A href="lexicographical_compare_3way.html">lexicographical_compare_3way</A></tt>,
<tt><A href="power.html">power</A></tt>,
<tt><A href="uninitialized_copy_n.html">uninitialized_copy_n</A></tt>.
<LI>Greater portability. The SGI STL can now be compiled using
Microsoft Visual C++ 5.0, and Borland C++ 5.02; it should not be
difficult to port it to any other compiler that has good support
for templates. (Specifically, any compiler that has default template
parameters.) Most compiler-specific code is isolated in the file
<tt>stl_config.h</tt>.
</UL>
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