Macintosh-Tools/Retro68
1
0
Fork 0
mirror of https://github.com/autc04/Retro68.git synced 2024-12-03 10:49:58 +00:00
Code Issues Projects Releases Wiki Activity
1d95fb6dd9
Retro68/gcc/libstdc++-v3/doc/html/manual/concept_checking.html

47 lines
4.1 KiB
HTML
Raw Normal View History

add gcc 4.70
2012-03-27 23:13:14 +00:00
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
upgrade gcc to 6.3.0, binutils to 2.28
2017-04-10 11:32:00 +00:00
<!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>Concept Checking</title><meta name="generator" content="DocBook XSL-NS Stylesheets V1.78.1" /><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="diagnostics.html" title="Chapter 5.  Diagnostics" /><link rel="prev" href="errno.html" title="Use of errno by the library" /><link rel="next" href="utilities.html" title="Chapter 6.  Utilities" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Concept Checking</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="errno.html">Prev</a> </td><th width="60%" align="center">Chapter 5. 
add gcc 4.70
2012-03-27 23:13:14 +00:00
Diagnostics
upgrade to gcc 4.9.1
2014-09-21 17:33:12 +00:00
</th><td width="20%" align="right"> <a accesskey="n" href="utilities.html">Next</a></td></tr></table><hr /></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="std.diagnostics.concept_checking"></a>Concept Checking</h2></div></div></div><p>
add gcc 4.70
2012-03-27 23:13:14 +00:00
In 1999, SGI added <span class="quote">“<span class="quote">concept checkers</span>”</span> to their
implementation of the STL: code which checked the template
parameters of instantiated pieces of the STL, in order to insure
that the parameters being used met the requirements of the
standard. For example, the Standard requires that types passed as
template parameters to <code class="classname">vector</code> be
"Assignable" (which means what you think it means). The
checking was done during compilation, and none of the code was
executed at runtime.
</p><p>
Unfortunately, the size of the compiler files grew significantly
as a result. The checking code itself was cumbersome. And bugs
were found in it on more than one occasion.
</p><p>
The primary author of the checking code, Jeremy Siek, had already
started work on a replacement implementation. The new code was
formally reviewed and accepted into
upgrade to gcc 4.9.1
2014-09-21 17:33:12 +00:00
<a class="link" href="http://www.boost.org/libs/concept_check/concept_check.htm" target="_top">the
add gcc 4.70
2012-03-27 23:13:14 +00:00
Boost libraries</a>, and we are pleased to incorporate it into the
GNU C++ library.
</p><p>
The new version imposes a much smaller space overhead on the generated
object file. The checks are also cleaner and easier to read and
understand.
</p><p>
They are off by default for all versions of GCC.
They can be enabled at configure time with
<a class="link" href="configure.html" title="Configure"><code class="literal">--enable-concept-checks</code></a>.
You can enable them on a per-translation-unit basis with
<code class="literal">-D_GLIBCXX_CONCEPT_CHECKS</code>.
</p><p>
Please note that the checks are based on the requirements in the original
upgrade gcc to 6.3.0, binutils to 2.28
2017-04-10 11:32:00 +00:00
C++ standard, many of which were relaxed in the C++11 standard and so valid
C++11 code may be incorrectly rejected by the concept checks. Additionally,
some correct C++03 code might be rejected by the concept checks,
add gcc 4.70
2012-03-27 23:13:14 +00:00
for example template argument types may need to be complete when used in
a template definition, rather than at the point of instantiation.
There are no plans to address these shortcomings.
upgrade gcc to 6.3.0, binutils to 2.28
2017-04-10 11:32:00 +00:00
</p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="errno.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="diagnostics.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="utilities.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Use of errno by the library </td><td width="20%" align="center"><a accesskey="h" href="../index.html">Home</a></td><td width="40%" align="right" valign="top"> Chapter 6. 
add gcc 4.70
2012-03-27 23:13:14 +00:00
Utilities
upgrade to gcc 4.9.1
2014-09-21 17:33:12 +00:00
</td></tr></table></div></body></html>
Reference in New Issue Copy Permalink