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Ran the chapter-renumbering thing.

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@ -66,16 +66,15 @@
</ul>
<li><a href="#n44">Operator overloading</a>
<ul>
<li><a href="#n45">An example (putting everything together)</a>
<li><a href="#n47">STL Vector to Ruby Array</a>
<li><a href="#n45">Example: STL Vector to Ruby Array</a>
</ul>
<li><a href="#n48">Advanced Topics</a>
<li><a href="#n46">Advanced Topics</a>
<ul>
<li><a href="#n49">Creating Multi-Module Packages</a>
<li><a href="#n50">Defining Aliases</a>
<li><a href="#n51">Predicate Methods</a>
<li><a href="#n52">Specifying Mixin Modules</a>
<li><a href="#n53">Interacting with Ruby's Garbage Collector</a>
<li><a href="#n47">Creating Multi-Module Packages</a>
<li><a href="#n48">Defining Aliases</a>
<li><a href="#n49">Predicate Methods</a>
<li><a href="#n50">Specifying Mixin Modules</a>
<li><a href="#n51">Interacting with Ruby's Garbage Collector</a>
</ul>
</ul>
<!-- INDEX -->
@ -1075,6 +1074,7 @@ For example:
<blockquote>
<pre>
%module example
%{
#include "pair.h"
%}
@ -1109,9 +1109,36 @@ irb(main):004:0> <b>p.second</b>
</pre>
</blockquote>
Obviously, there is more to template wrapping than shown in this example.
More details can be found in the <a href="SWIGPlus.html">SWIG and C++</a> chapter. Some more complicated
examples will appear later.
On a related note, the standard SWIG library contains a number of modules that
provide typemaps for standard C++ library classes (such as <tt>std::pair</tt>, <tt>std::string</tt>
and <tt>std::vector</tt>). These library modules don't provide wrappers around the templates
themselves, but they do make it convenient for users of your extension module to pass
Ruby objects (such as arrays and strings) to wrapped C++ code that expects instances
of standard C++ templates. For example, suppose the C++ library you're wrapping has a
function that expects a vector of floats:
<blockquote><pre>
%module example
float sum(const std::vector&lt;float&gt;& values);
</pre></blockquote>
Rather than go through the hassle of writing an "in" typemap to convert an array of Ruby
numbers into a std::vector&lt;float&gt;, you can just use the <tt>std_vector.i</tt> module
from the standard SWIG library:
<blockquote>
<pre>
%module example
<b>%include std_vector.i</b>
float sum(const std::vector&lt;float&gt;& values);
</pre>
</blockquote>
Obviously, there is a lot more to template wrapping than shown in these examples.
More details can be found in the <a href="SWIGPlus.html">SWIG and C++</a> chapter.
<a name="n24"></a><H3>20.3.13 C++ Smart Pointers</H3>
@ -2353,68 +2380,10 @@ __ge__ - &gt;=
Note that although SWIG supports the <tt>__eq__</tt> magic method name for defining an equivalence operator, there is no separate method for handling <i>inequality</i> since Ruby parses the expression <i>a != b</i> as <i>!(a == b)</i>.
<a name="n45"></a><H3>20.7.1 Example: Using Standard SWIG Library Modules</H3>
<a name="n45"></a><H3>20.7.1 Example: STL Vector to Ruby Array</H3>
The following example illustrates how to use two of the standard SWIG library modules
(the <tt>std_string.i</tt> and <tt>std_vector.i</tt> modules).
<p>
<blockquote><pre>
%module example
%{
#include &lt;string&gt;
#include &lt;vector&gt;
%}
%include std_string.i
%include std_vector.i
%template(StringVector) std::vector&lt;string&gt;;
%template(IntVector) std::vector&lt;int&gt;;
</pre></blockquote>
<p>
An IRB session using this extension might go like this:
<blockquote><pre>
$ <b>irb</b>
irb(main):001:0> <b>require 'Example'</b>
=> true
irb(main):002:0> <b>i_list = Example::IntVector.new</b>
=> #&lt;Example::IntVector:0x2ab9a18>
irb(main):003:0> <b>i_list.push(1)</b>
=> nil
irb(main):004:0> <b>i_list.push(2)</b>
=> nil
irb(main):005:0> <b>i_list.each { |i| puts i }</b>
1
2
=> nil
irb(main):006:0> <b>i_list.length</b>
=> 2
irb(main):007:0> <b>s_list = Example::StringVector.new</b>
=> #&lt;Example::IntVector:0x2aa9c98>
irb(main):008:0> <b>s_list.push("Hello")</b>
=> nil
irb(main):009:0> <b>s_list.push("There")</b>
=> nil
irb(main):010:0> <b>s_list.each { |s| puts s }</b>
Hello
There
=> nil
irb(main):011:0> <b>s_list.length</b>
=> 2
irb(main):012:0> <b>s_list[0]</b>
=> "Hello"
irb(main):013:0> <b>s_list[0] = "New Entry"</b>
=> "New Entry"
irb(main):014:0> <b>s_list[0]</b>
=> "New Entry"
</pre></blockquote>
<p>
<a name="n47"></a><H3>20.7.3 Example: STL Vector to Ruby Array</H3>
<em><b>FIXME: This example is out of place here!</b></em><p>
Another use for macros and type maps is to create a Ruby array from a STL
vector of pointers. In essence, copy of all the pointers in the vector into a Ruby
@ -2500,10 +2469,10 @@ It is also possible to create a Ruby array from a vector of static data types:
</pre></blockquote>
<a name="n48"></a><H2>20.8 Advanced Topics</H2>
<a name="n46"></a><H2>20.8 Advanced Topics</H2>
<a name="n49"></a><H3>20.8.1 Creating Multi-Module Packages</H3>
<a name="n47"></a><H3>20.8.1 Creating Multi-Module Packages</H3>
The chapter on <a href="Advanced.html">Advanced Topics</a> discusses the basics
@ -2628,7 +2597,7 @@ irb(main):005:0> <b>c.getX()</b>
</pre>
</blockquote>
<a name="n50"></a><H3>20.8.2 Defining Aliases</H3>
<a name="n48"></a><H3>20.8.2 Defining Aliases</H3>
It's a fairly common practice in the Ruby built-ins and standard library to
@ -2696,7 +2665,7 @@ mechanism and so the same name matching rules used for other kinds of features
apply (see the chapter on <a href="Customization.html">"Customization Features"</a>)
for more details).
<a name="n51"></a><H3>20.8.3 Predicate Methods</H3>
<a name="n49"></a><H3>20.8.3 Predicate Methods</H3>
Predicate methods in Ruby are those which return either <tt>true</tt> or
@ -2747,7 +2716,7 @@ Note that the <tt>%predicate</tt> directive is implemented using SWIG's
of features apply (see the chapter on <a href="Customization.html">"Customization
Features"</a>) for more details).
<a name="n52"></a><H3>20.8.4 Specifying Mixin Modules</H3>
<a name="n50"></a><H3>20.8.4 Specifying Mixin Modules</H3>
The Ruby language doesn't support multiple inheritance, but it does allow you
@ -2819,7 +2788,7 @@ Note that the <tt>%mixin</tt> directive is implemented using SWIG's
of features apply (see the chapter on <a href="Customization.html">"Customization
Features"</a>) for more details).
<a name="n53"></a><H3>20.8.5 Interacting with Ruby's Garbage Collector</H3>
<a name="n51"></a><H3>20.8.5 Interacting with Ruby's Garbage Collector</H3>
<b>This section is still unfinished!</b><p>
@ -2988,4 +2957,4 @@ for more details).
<address>SWIG 1.3 - Last Modified : $Date$</address>
</body>
</html>
</html>