mirror of
https://github.com/autc04/Retro68.git
synced 2024-12-22 19:30:36 +00:00
54 lines
5.2 KiB
HTML
54 lines
5.2 KiB
HTML
<?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>Chapter 5. Diagnostics</title><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><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="std_contents.html" title="Part II. Standard Contents" /><link rel="prev" href="termination.html" title="Termination" /><link rel="next" href="errno.html" title="Use of errno by the library" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Chapter 5.
|
||
Diagnostics
|
||
|
||
</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="termination.html">Prev</a> </td><th width="60%" align="center">Part II.
|
||
Standard Contents
|
||
</th><td width="20%" align="right"> <a accesskey="n" href="errno.html">Next</a></td></tr></table><hr /></div><div class="chapter"><div class="titlepage"><div><div><h2 class="title"><a id="std.diagnostics"></a>Chapter 5.
|
||
Diagnostics
|
||
<a id="id-1.3.4.3.1.1.1" class="indexterm"></a>
|
||
</h2></div></div></div><div class="toc"><p><strong>Table of Contents</strong></p><dl class="toc"><dt><span class="section"><a href="diagnostics.html#std.diagnostics.exceptions">Exceptions</a></span></dt><dd><dl><dt><span class="section"><a href="diagnostics.html#std.diagnostics.exceptions.api">API Reference</a></span></dt><dt><span class="section"><a href="diagnostics.html#std.diagnostics.exceptions.data">Adding Data to <code class="classname">exception</code></a></span></dt></dl></dd><dt><span class="section"><a href="errno.html">Use of errno by the library</a></span></dt><dt><span class="section"><a href="concept_checking.html">Concept Checking</a></span></dt></dl></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="std.diagnostics.exceptions"></a>Exceptions</h2></div></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="std.diagnostics.exceptions.api"></a>API Reference</h3></div></div></div><p>
|
||
Most exception classes are defined in one of the standard headers
|
||
<code class="filename"><exception></code>,
|
||
<code class="filename"><stdexcept></code>,
|
||
<code class="filename"><new></code>, and
|
||
<code class="filename"><typeinfo></code>.
|
||
The C++ 2011 revision of the standard added more exception types
|
||
in the headers
|
||
<code class="filename"><functional></code>,
|
||
<code class="filename"><future></code>,
|
||
<code class="filename"><regex></code>, and
|
||
<code class="filename"><system_error></code>.
|
||
The C++ 2017 revision of the standard added more exception types
|
||
in the headers
|
||
<code class="filename"><any></code>,
|
||
<code class="filename"><filesystem></code>,
|
||
<code class="filename"><optional></code>, and
|
||
<code class="filename"><variant></code>.
|
||
</p><p>
|
||
All exceptions thrown by the library have a base class of type
|
||
<code class="classname">std::exception</code>,
|
||
defined in <code class="filename"><exception></code>.
|
||
This type has no <code class="classname">std::string</code> member.
|
||
</p><p>
|
||
Derived from this are several classes that may have a
|
||
<code class="classname">std::string</code> member. A full hierarchy can be
|
||
found in the source documentation.
|
||
</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="std.diagnostics.exceptions.data"></a>Adding Data to <code class="classname">exception</code></h3></div></div></div><p>
|
||
The standard exception classes carry with them a single string as
|
||
data (usually describing what went wrong or where the 'throw' took
|
||
place). It's good to remember that you can add your own data to
|
||
these exceptions when extending the hierarchy:
|
||
</p><pre class="programlisting">
|
||
struct My_Exception : public std::runtime_error
|
||
{
|
||
public:
|
||
My_Exception (const string& whatarg)
|
||
: std::runtime_error(whatarg), e(errno), id(GetDataBaseID()) { }
|
||
int errno_at_time_of_throw() const { return e; }
|
||
DBID id_of_thing_that_threw() const { return id; }
|
||
protected:
|
||
int e;
|
||
DBID id; // some user-defined type
|
||
};
|
||
</pre></div></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="termination.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="std_contents.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="errno.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Termination </td><td width="20%" align="center"><a accesskey="h" href="../index.html">Home</a></td><td width="40%" align="right" valign="top"> Use of errno by the library</td></tr></table></div></body></html> |