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| author | bstarynk <bstarynk@138bc75d-0d04-0410-961f-82ee72b054a4> | 2009-10-09 15:21:54 +0000 |
|---|---|---|
| committer | bstarynk <bstarynk@138bc75d-0d04-0410-961f-82ee72b054a4> | 2009-10-09 15:21:54 +0000 |
| commit | 27e0321aadb8c2c656af795612836cf896f0557d (patch) | |
| tree | 7624fc2d71c047c04fe2c3c927b645f19760fdee /libstdc++-v3/doc/html/manual/bk01pt12ch34s03.html | |
| parent | cf4848768d6fbbbaec367eb8107504f1803091e2 (diff) | |
| download | gcc-27e0321aadb8c2c656af795612836cf896f0557d.tar.gz | |
2009-10-09 Basile Starynkevitch <basile@starynkevitch.net>
MELT branch merged with trunk rev 152583 after the LTO merge
inside trunk.
[during merge with trunk 152583 the version information from GCC
is used, not the checksum of the executable!]
* gcc/melt-runtime.h (melt_gccversionstr): added extern declaration.
* gcc/melt-runtime.c: Moved the #include before everything else.
Updated comment NOTE about gengtype - which is now compatible
with the trunk's.
(melt_gccversionstr): added declaration.
(load_checked_dynamic_module_index): use a gcc version string in
modules, not a checksum of the executable.
(melt_really_initialize): get a second argument for the gcc
version string. Initialize melt_gccversionstr with it.
(plugin_init): Build the gccversionstr out of gcc_version
structure.
(melt_initialize): calls melt_really_initialize with
version_string.
(melt_output_cfile_decl_impl): generates a genversionstr_melt
instead of a genchecksum_melt.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/melt-branch@152591 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'libstdc++-v3/doc/html/manual/bk01pt12ch34s03.html')
| -rw-r--r-- | libstdc++-v3/doc/html/manual/bk01pt12ch34s03.html | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/libstdc++-v3/doc/html/manual/bk01pt12ch34s03.html b/libstdc++-v3/doc/html/manual/bk01pt12ch34s03.html new file mode 100644 index 00000000000..3e3b28d9998 --- /dev/null +++ b/libstdc++-v3/doc/html/manual/bk01pt12ch34s03.html @@ -0,0 +1,50 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!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>Deprecated HP/SGI</title><meta name="generator" content="DocBook XSL Stylesheets V1.74.3" /><meta name="keywords" content=" ISO C++ , library " /><link rel="home" href="../spine.html" title="The GNU C++ Library Documentation" /><link rel="up" href="ext_containers.html" title="Chapter 34. Containers" /><link rel="prev" href="bk01pt12ch34s02.html" title="HP/SGI" /><link rel="next" href="ext_utilities.html" title="Chapter 35. Utilities" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Deprecated HP/SGI</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="bk01pt12ch34s02.html">Prev</a> </td><th width="60%" align="center">Chapter 34. Containers</th><td width="20%" align="right"> <a accesskey="n" href="ext_utilities.html">Next</a></td></tr></table><hr /></div><div class="sect1" lang="en" xml:lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="manual.ext.containers.deprecated_sgi"></a>Deprecated HP/SGI</h2></div></div></div><p> + The SGI hashing classes <code class="classname">hash_set</code> and + <code class="classname">hash_set</code> have been deprecated by the + unordered_set, unordered_multiset, unordered_map, + unordered_multimap containers in TR1 and the upcoming C++0x, and + may be removed in future releases. + </p><p>The SGI headers</p><pre class="programlisting"> + <hash_map> + <hash_set> + <rope> + <slist> + <rb_tree> + </pre><p>are all here; + <code class="code"><hash_map></code> and <code class="code"><hash_set></code> + are deprecated but available as backwards-compatible extensions, + as discussed further below. <code class="code"><rope></code> is the + SGI specialization for large strings ("rope," + "large strings," get it? Love that geeky humor.) + <code class="code"><slist></code> is a singly-linked list, for when the + doubly-linked <code class="code">list<></code> is too much space + overhead, and <code class="code"><rb_tree></code> exposes the red-black + tree classes used in the implementation of the standard maps and + sets. + </p><p>Each of the associative containers map, multimap, set, and multiset + have a counterpart which uses a + <a class="ulink" href="http://www.sgi.com/tech/stl/HashFunction.html" target="_top">hashing + function</a> to do the arranging, instead of a strict weak ordering + function. The classes take as one of their template parameters a + function object that will return the hash value; by default, an + instantiation of + <a class="ulink" href="http://www.sgi.com/tech/stl/hash.html" target="_top">hash</a>. + You should specialize this functor for your class, or define your own, + before trying to use one of the hashing classes. + </p><p>The hashing classes support all the usual associative container + functions, as well as some extra constructors specifying the number + of buckets, etc. + </p><p>Why would you want to use a hashing class instead of the + “<span class="quote">normal</span>”implementations? Matt Austern writes: + </p><div class="blockquote"><blockquote class="blockquote"><p> + <span class="emphasis"><em>[W]ith a well chosen hash function, hash tables + generally provide much better average-case performance than + binary search trees, and much worse worst-case performance. So + if your implementation has hash_map, if you don't mind using + nonstandard components, and if you aren't scared about the + possibility of pathological cases, you'll probably get better + performance from hash_map. + </em></span> + </p></blockquote></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="bk01pt12ch34s02.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ext_containers.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="ext_utilities.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">HP/SGI </td><td width="20%" align="center"><a accesskey="h" href="../spine.html">Home</a></td><td width="40%" align="right" valign="top"> Chapter 35. Utilities</td></tr></table></div></body></html> |