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added a note about type generators being a workaround for no templated

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typedefs


[SVN r9185]
This commit is contained in:
Jeremy Siek 2001-02-13 04:32:00 +00:00
parent aa83d91940
commit edfc1409f1
1 changed files with 12 additions and 5 deletions
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17
more/generic_programming.html
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@ -157,11 +157,11 @@ namespace std {
<h2><a name="type_generator">Type Generators</a></h2>
<p>A <i>type generator</i> is a template whose only purpose is to
synthesize a single new type based on its template argument(s). The
generated type is usually expressed as a nested typedef named,
appropriately <tt>type</tt>. A type generator is usually used to
consolidate a complicated type expression into a simple one, as in
<tt>boost::<a href=
synthesize a single new type based on its template argument(s)<a
href="#1">[1]</a>. The generated type is usually expressed as a
nested typedef named, appropriately <tt>type</tt>. A type
generator is usually used to consolidate a complicated type
expression into a simple one, as in <tt>boost::<a href=
"../libs/utility/filter_iterator.hpp">filter_iterator_generator</a></tt>,
which looks something like this:
@ -191,6 +191,7 @@ boost::filter_iterator_generator&lt;my_predicate,my_base_iterator&gt;::type
</pre>
</blockquote>
<h2><a name="object_generator">Object Generators</a></h2>
<p>An <i>object generator</i> is a function template whose only purpose is
@ -286,6 +287,12 @@ void append_sequence(Container&amp; c, Iterator start, Iterator finish)
<a href=
"http://www.cs.rpi.edu/~wiseb/xrds/ovp2-3b.html#SECTION00015000000000000000">
here</a>.
<h2>Notes</h2>
<a name="1">[1]</a> Type generators are a workaround for the lack
of ``templated typedefs'' in C++.
<hr>
<p>Revised